/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:32:01,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:32:01,896 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 08:32:01,900 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:32:01,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:32:01,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:32:01,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:32:01,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:32:01,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:32:01,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:32:01,928 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:32:01,928 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:32:01,928 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:32:01,929 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:32:01,929 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:32:01,929 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:32:01,930 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:32:01,930 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:32:01,930 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:32:01,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:32:01,930 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:32:01,931 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:32:01,931 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:32:01,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:32:01,932 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:32:01,932 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:32:01,932 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:32:01,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:32:01,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:32:01,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:32:01,933 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:32:01,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:32:01,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:32:01,933 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:32:01,934 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:32:01,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:32:02,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:32:02,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:32:02,208 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:32:02,209 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:32:02,209 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:32:02,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-24 08:32:03,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:32:03,391 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:32:03,391 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-24 08:32:03,397 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c749efe08/5cc170b306714a6bbb47fcb397e9a72b/FLAGc808e80b3 [2023-08-24 08:32:03,407 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c749efe08/5cc170b306714a6bbb47fcb397e9a72b [2023-08-24 08:32:03,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:32:03,409 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:32:03,410 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:32:03,410 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:32:03,412 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:32:03,412 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67629c44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03, skipping insertion in model container [2023-08-24 08:32:03,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,428 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:32:03,598 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-08-24 08:32:03,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:32:03,617 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:32:03,648 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c[2271,2284] [2023-08-24 08:32:03,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:32:03,664 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:32:03,664 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:32:03,669 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:32:03,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03 WrapperNode [2023-08-24 08:32:03,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:32:03,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:32:03,671 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:32:03,671 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:32:03,675 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,713 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 143 [2023-08-24 08:32:03,714 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:32:03,715 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:32:03,715 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:32:03,715 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:32:03,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,743 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,745 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,746 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,748 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:32:03,749 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:32:03,749 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:32:03,749 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:32:03,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (1/1) ... [2023-08-24 08:32:03,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:32:03,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:03,784 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 08:32:03,802 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 08:32:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:32:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:32:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:32:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:32:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:32:03,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:32:03,812 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:32:03,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:32:03,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:32:03,814 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 08:32:03,885 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:32:03,886 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:32:04,072 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:32:04,195 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:32:04,195 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 08:32:04,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:32:04 BoogieIcfgContainer [2023-08-24 08:32:04,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:32:04,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:32:04,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:32:04,200 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:32:04,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:32:03" (1/3) ... [2023-08-24 08:32:04,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeec136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:32:04, skipping insertion in model container [2023-08-24 08:32:04,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:32:03" (2/3) ... [2023-08-24 08:32:04,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@eeec136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:32:04, skipping insertion in model container [2023-08-24 08:32:04,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:32:04" (3/3) ... [2023-08-24 08:32:04,202 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-24 08:32:04,212 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:32:04,212 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:32:04,212 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:32:04,273 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 08:32:04,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 112 transitions, 240 flow [2023-08-24 08:32:04,363 INFO L124 PetriNetUnfolderBase]: 9/110 cut-off events. [2023-08-24 08:32:04,363 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:32:04,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 110 events. 9/110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 71 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-24 08:32:04,369 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 112 transitions, 240 flow [2023-08-24 08:32:04,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 102 transitions, 216 flow [2023-08-24 08:32:04,374 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:32:04,386 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 216 flow [2023-08-24 08:32:04,389 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 102 transitions, 216 flow [2023-08-24 08:32:04,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 216 flow [2023-08-24 08:32:04,419 INFO L124 PetriNetUnfolderBase]: 9/102 cut-off events. [2023-08-24 08:32:04,419 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:32:04,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 102 events. 9/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-08-24 08:32:04,421 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 08:32:07,581 INFO L134 LiptonReduction]: Checked pairs total: 647 [2023-08-24 08:32:07,581 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-24 08:32:07,591 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:32:07,595 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;@70a4a778, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:32:07,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 08:32:07,599 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:32:07,599 INFO L124 PetriNetUnfolderBase]: 3/16 cut-off events. [2023-08-24 08:32:07,599 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 08:32:07,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:07,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:07,600 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:07,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:07,603 INFO L85 PathProgramCache]: Analyzing trace with hash 612242945, now seen corresponding path program 1 times [2023-08-24 08:32:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973251900] [2023-08-24 08:32:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:07,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:07,822 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 08:32:07,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:07,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973251900] [2023-08-24 08:32:07,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973251900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:32:07,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:32:07,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:32:07,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002648000] [2023-08-24 08:32:07,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:32:07,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:32:07,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:07,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:32:07,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:32:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 214 [2023-08-24 08:32:07,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:07,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:07,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 214 [2023-08-24 08:32:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:07,924 INFO L124 PetriNetUnfolderBase]: 66/116 cut-off events. [2023-08-24 08:32:07,924 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 08:32:07,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 116 events. 66/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 318 event pairs, 9 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-08-24 08:32:07,925 INFO L140 encePairwiseOnDemand]: 210/214 looper letters, 21 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-08-24 08:32:07,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 27 transitions, 125 flow [2023-08-24 08:32:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:32:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:32:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-08-24 08:32:07,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4937694704049844 [2023-08-24 08:32:07,946 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-08-24 08:32:07,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-08-24 08:32:07,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:07,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-08-24 08:32:07,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:07,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:07,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:07,959 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 317 transitions. [2023-08-24 08:32:07,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 27 transitions, 125 flow [2023-08-24 08:32:07,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 27 transitions, 111 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 08:32:07,962 INFO L231 Difference]: Finished difference. Result has 20 places, 19 transitions, 57 flow [2023-08-24 08:32:07,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=20, PETRI_TRANSITIONS=19} [2023-08-24 08:32:07,966 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-08-24 08:32:07,966 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 19 transitions, 57 flow [2023-08-24 08:32:07,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:07,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:07,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:07,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:32:07,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:07,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash 73829977, now seen corresponding path program 1 times [2023-08-24 08:32:07,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:07,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035227835] [2023-08-24 08:32:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:07,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:08,140 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 08:32:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:08,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035227835] [2023-08-24 08:32:08,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035227835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:32:08,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:32:08,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:32:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918526616] [2023-08-24 08:32:08,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:32:08,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:32:08,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:32:08,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:32:08,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:08,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 19 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:08,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:08,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:08,219 INFO L124 PetriNetUnfolderBase]: 113/217 cut-off events. [2023-08-24 08:32:08,219 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-24 08:32:08,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 217 events. 113/217 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 825 event pairs, 62 based on Foata normal form. 12/227 useless extension candidates. Maximal degree in co-relation 168. Up to 122 conditions per place. [2023-08-24 08:32:08,222 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 34 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 08:32:08,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 40 transitions, 194 flow [2023-08-24 08:32:08,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:32:08,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:32:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2023-08-24 08:32:08,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38878504672897196 [2023-08-24 08:32:08,225 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2023-08-24 08:32:08,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2023-08-24 08:32:08,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:08,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2023-08-24 08:32:08,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,230 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,230 INFO L175 Difference]: Start difference. First operand has 20 places, 19 transitions, 57 flow. Second operand 5 states and 416 transitions. [2023-08-24 08:32:08,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 40 transitions, 194 flow [2023-08-24 08:32:08,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 08:32:08,231 INFO L231 Difference]: Finished difference. Result has 26 places, 23 transitions, 92 flow [2023-08-24 08:32:08,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=26, PETRI_TRANSITIONS=23} [2023-08-24 08:32:08,232 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 08:32:08,232 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 23 transitions, 92 flow [2023-08-24 08:32:08,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:08,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:08,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:32:08,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:08,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash -226286119, now seen corresponding path program 1 times [2023-08-24 08:32:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30007306] [2023-08-24 08:32:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:08,343 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 08:32:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:08,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30007306] [2023-08-24 08:32:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30007306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:32:08,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:32:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:32:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601193037] [2023-08-24 08:32:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:32:08,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:32:08,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:32:08,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:32:08,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:08,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:08,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:08,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:08,404 INFO L124 PetriNetUnfolderBase]: 79/162 cut-off events. [2023-08-24 08:32:08,404 INFO L125 PetriNetUnfolderBase]: For 89/95 co-relation queries the response was YES. [2023-08-24 08:32:08,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 162 events. 79/162 cut-off events. For 89/95 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 572 event pairs, 44 based on Foata normal form. 12/171 useless extension candidates. Maximal degree in co-relation 320. Up to 116 conditions per place. [2023-08-24 08:32:08,407 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 17 selfloop transitions, 2 changer transitions 16/36 dead transitions. [2023-08-24 08:32:08,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 36 transitions, 195 flow [2023-08-24 08:32:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:32:08,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:32:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 413 transitions. [2023-08-24 08:32:08,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385981308411215 [2023-08-24 08:32:08,408 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 413 transitions. [2023-08-24 08:32:08,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 413 transitions. [2023-08-24 08:32:08,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:08,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 413 transitions. [2023-08-24 08:32:08,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 82.6) internal successors, (413), 5 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,411 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,411 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 92 flow. Second operand 5 states and 413 transitions. [2023-08-24 08:32:08,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 36 transitions, 195 flow [2023-08-24 08:32:08,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 36 transitions, 191 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 08:32:08,414 INFO L231 Difference]: Finished difference. Result has 31 places, 20 transitions, 80 flow [2023-08-24 08:32:08,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=80, PETRI_PLACES=31, PETRI_TRANSITIONS=20} [2023-08-24 08:32:08,415 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-08-24 08:32:08,417 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 20 transitions, 80 flow [2023-08-24 08:32:08,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:08,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:08,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 08:32:08,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:08,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash 189432966, now seen corresponding path program 1 times [2023-08-24 08:32:08,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:08,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34440515] [2023-08-24 08:32:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:08,514 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 08:32:08,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:08,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34440515] [2023-08-24 08:32:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34440515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137776209] [2023-08-24 08:32:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:08,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:08,517 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 08:32:08,571 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 08:32:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:08,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:32:08,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:08,680 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 08:32:08,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:08,715 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 08:32:08,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137776209] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:08,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:32:08,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 08:32:08,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321878332] [2023-08-24 08:32:08,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:32:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:32:08,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:32:08,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:32:08,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:08,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 20 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:08,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:08,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:08,768 INFO L124 PetriNetUnfolderBase]: 68/122 cut-off events. [2023-08-24 08:32:08,768 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-24 08:32:08,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 122 events. 68/122 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 344 event pairs, 23 based on Foata normal form. 12/133 useless extension candidates. Maximal degree in co-relation 354. Up to 92 conditions per place. [2023-08-24 08:32:08,769 INFO L140 encePairwiseOnDemand]: 209/214 looper letters, 21 selfloop transitions, 5 changer transitions 0/27 dead transitions. [2023-08-24 08:32:08,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 159 flow [2023-08-24 08:32:08,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:32:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:32:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 404 transitions. [2023-08-24 08:32:08,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775700934579439 [2023-08-24 08:32:08,770 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 404 transitions. [2023-08-24 08:32:08,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 404 transitions. [2023-08-24 08:32:08,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:08,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 404 transitions. [2023-08-24 08:32:08,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,773 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,773 INFO L175 Difference]: Start difference. First operand has 31 places, 20 transitions, 80 flow. Second operand 5 states and 404 transitions. [2023-08-24 08:32:08,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 159 flow [2023-08-24 08:32:08,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 27 transitions, 133 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-24 08:32:08,775 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 81 flow [2023-08-24 08:32:08,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=81, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2023-08-24 08:32:08,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 5 predicate places. [2023-08-24 08:32:08,776 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 81 flow [2023-08-24 08:32:08,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:08,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:08,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:08,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 08:32:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:08,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:08,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash -596144770, now seen corresponding path program 1 times [2023-08-24 08:32:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:08,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294326314] [2023-08-24 08:32:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:09,054 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 08:32:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294326314] [2023-08-24 08:32:09,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294326314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41248186] [2023-08-24 08:32:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:09,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:09,069 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 08:32:09,123 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 08:32:09,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:09,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:32:09,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:09,188 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 08:32:09,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:09,213 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 08:32:09,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41248186] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:09,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:32:09,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 08:32:09,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215167695] [2023-08-24 08:32:09,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:32:09,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:32:09,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:09,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:32:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:32:09,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:09,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:09,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:09,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:09,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:09,252 INFO L124 PetriNetUnfolderBase]: 52/97 cut-off events. [2023-08-24 08:32:09,253 INFO L125 PetriNetUnfolderBase]: For 63/73 co-relation queries the response was YES. [2023-08-24 08:32:09,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 97 events. 52/97 cut-off events. For 63/73 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 20 based on Foata normal form. 18/113 useless extension candidates. Maximal degree in co-relation 267. Up to 75 conditions per place. [2023-08-24 08:32:09,253 INFO L140 encePairwiseOnDemand]: 209/214 looper letters, 22 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-24 08:32:09,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 163 flow [2023-08-24 08:32:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:32:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:32:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 404 transitions. [2023-08-24 08:32:09,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775700934579439 [2023-08-24 08:32:09,254 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 404 transitions. [2023-08-24 08:32:09,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 404 transitions. [2023-08-24 08:32:09,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:09,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 404 transitions. [2023-08-24 08:32:09,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:09,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:09,257 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 214.0) internal successors, (1284), 6 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:09,257 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 81 flow. Second operand 5 states and 404 transitions. [2023-08-24 08:32:09,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 163 flow [2023-08-24 08:32:09,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 149 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-24 08:32:09,258 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 91 flow [2023-08-24 08:32:09,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-24 08:32:09,258 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-08-24 08:32:09,259 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 91 flow [2023-08-24 08:32:09,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.0) internal successors, (395), 5 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:09,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:09,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:09,273 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 08:32:09,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:09,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:09,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1929170136, now seen corresponding path program 1 times [2023-08-24 08:32:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512374812] [2023-08-24 08:32:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:09,874 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 08:32:09,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512374812] [2023-08-24 08:32:09,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512374812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:09,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535283945] [2023-08-24 08:32:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:09,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:09,875 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 08:32:09,897 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 08:32:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:09,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-24 08:32:09,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:10,011 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 08:32:10,038 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 08:32:10,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:32:10,097 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 08:32:10,139 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 08:32:10,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:10,288 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_ArrVal_133 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset) (+ .cse0 c_~counter~0 1))) (forall ((v_ArrVal_133 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-08-24 08:32:10,309 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (<= (+ c_~counter~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|)) (select (select (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (forall ((v_ArrVal_133 (Array Int Int)) (v_ArrVal_132 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_132))) (< (select (select (store .cse1 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_133) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) (+ c_~counter~0 (select (select .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) is different from false [2023-08-24 08:32:10,320 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:10,321 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 46 treesize of output 35 [2023-08-24 08:32:10,326 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 286 treesize of output 254 [2023-08-24 08:32:10,350 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 08:32:10,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-24 08:32:10,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:10,378 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 47 treesize of output 36 [2023-08-24 08:32:10,380 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:10,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 64 treesize of output 56 [2023-08-24 08:32:10,407 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 08:32:10,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535283945] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:10,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:10,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 08:32:10,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362113885] [2023-08-24 08:32:10,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:10,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:32:10,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:10,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:32:10,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=301, Unknown=10, NotChecked=74, Total=462 [2023-08-24 08:32:10,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:10,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 91 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:10,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:10,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:10,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:10,740 INFO L124 PetriNetUnfolderBase]: 110/198 cut-off events. [2023-08-24 08:32:10,740 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-24 08:32:10,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 198 events. 110/198 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 600 event pairs, 1 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 587. Up to 115 conditions per place. [2023-08-24 08:32:10,741 INFO L140 encePairwiseOnDemand]: 207/214 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-08-24 08:32:10,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 55 transitions, 313 flow [2023-08-24 08:32:10,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:32:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:32:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 534 transitions. [2023-08-24 08:32:10,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3119158878504673 [2023-08-24 08:32:10,743 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 534 transitions. [2023-08-24 08:32:10,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 534 transitions. [2023-08-24 08:32:10,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:10,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 534 transitions. [2023-08-24 08:32:10,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.75) internal successors, (534), 8 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:10,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:10,746 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:10,746 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 91 flow. Second operand 8 states and 534 transitions. [2023-08-24 08:32:10,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 55 transitions, 313 flow [2023-08-24 08:32:10,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 301 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-24 08:32:10,749 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 172 flow [2023-08-24 08:32:10,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-24 08:32:10,751 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-08-24 08:32:10,751 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 172 flow [2023-08-24 08:32:10,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:10,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:10,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:10,777 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 08:32:10,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:10,957 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:10,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:10,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1482654440, now seen corresponding path program 2 times [2023-08-24 08:32:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:10,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402460760] [2023-08-24 08:32:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:10,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:11,223 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 08:32:11,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402460760] [2023-08-24 08:32:11,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402460760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:11,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627763110] [2023-08-24 08:32:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:11,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:11,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:11,245 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 08:32:11,316 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 08:32:11,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:11,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:11,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 08:32:11,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:11,442 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 08:32:11,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:11,475 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:11,475 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 22 treesize of output 15 [2023-08-24 08:32:11,484 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:32:11,484 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 10 [2023-08-24 08:32:11,520 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 08:32:11,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627763110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:11,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:11,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 08:32:11,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100392244] [2023-08-24 08:32:11,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:11,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:32:11,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:32:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:32:11,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 08:32:11,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 75.81818181818181) internal successors, (834), 11 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:11,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:11,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 08:32:11,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:11,658 INFO L124 PetriNetUnfolderBase]: 137/246 cut-off events. [2023-08-24 08:32:11,658 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2023-08-24 08:32:11,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 892 conditions, 246 events. 137/246 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 773 event pairs, 27 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 868. Up to 190 conditions per place. [2023-08-24 08:32:11,659 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 41 selfloop transitions, 13 changer transitions 1/55 dead transitions. [2023-08-24 08:32:11,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 55 transitions, 387 flow [2023-08-24 08:32:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 08:32:11,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711615487316422 [2023-08-24 08:32:11,661 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 08:32:11,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 08:32:11,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:11,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 08:32:11,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:11,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:11,664 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:11,664 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 172 flow. Second operand 7 states and 556 transitions. [2023-08-24 08:32:11,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 55 transitions, 387 flow [2023-08-24 08:32:11,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 362 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 08:32:11,666 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 266 flow [2023-08-24 08:32:11,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=266, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-24 08:32:11,667 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-08-24 08:32:11,667 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 266 flow [2023-08-24 08:32:11,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.81818181818181) internal successors, (834), 11 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:11,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:11,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:11,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 08:32:11,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:11,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:11,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:11,872 INFO L85 PathProgramCache]: Analyzing trace with hash 146066334, now seen corresponding path program 3 times [2023-08-24 08:32:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262509130] [2023-08-24 08:32:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:11,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:12,107 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 08:32:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262509130] [2023-08-24 08:32:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262509130] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021865976] [2023-08-24 08:32:12,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:32:12,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:12,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:12,109 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 08:32:12,111 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 08:32:12,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:32:12,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:12,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 08:32:12,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:12,242 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 08:32:12,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:12,275 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:12,275 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 22 treesize of output 15 [2023-08-24 08:32:12,283 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:32:12,283 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 10 [2023-08-24 08:32:12,324 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 08:32:12,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021865976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:12,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:12,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 08:32:12,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149199907] [2023-08-24 08:32:12,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:12,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:32:12,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:12,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:32:12,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:32:12,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 08:32:12,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 266 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:12,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:12,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 08:32:12,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:12,461 INFO L124 PetriNetUnfolderBase]: 153/275 cut-off events. [2023-08-24 08:32:12,461 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-24 08:32:12,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1081 conditions, 275 events. 153/275 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 921 event pairs, 31 based on Foata normal form. 1/275 useless extension candidates. Maximal degree in co-relation 1053. Up to 219 conditions per place. [2023-08-24 08:32:12,463 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 46 selfloop transitions, 14 changer transitions 1/61 dead transitions. [2023-08-24 08:32:12,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 61 transitions, 472 flow [2023-08-24 08:32:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 558 transitions. [2023-08-24 08:32:12,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724966622162884 [2023-08-24 08:32:12,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 558 transitions. [2023-08-24 08:32:12,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 558 transitions. [2023-08-24 08:32:12,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:12,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 558 transitions. [2023-08-24 08:32:12,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.71428571428571) internal successors, (558), 7 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 08:32:12,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:12,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:12,469 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 266 flow. Second operand 7 states and 558 transitions. [2023-08-24 08:32:12,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 61 transitions, 472 flow [2023-08-24 08:32:12,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 451 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 08:32:12,471 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 334 flow [2023-08-24 08:32:12,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=334, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-08-24 08:32:12,473 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-08-24 08:32:12,473 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 334 flow [2023-08-24 08:32:12,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:12,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:12,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:12,491 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 08:32:12,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:12,678 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:12,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:12,679 INFO L85 PathProgramCache]: Analyzing trace with hash 278098124, now seen corresponding path program 4 times [2023-08-24 08:32:12,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:12,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702435554] [2023-08-24 08:32:12,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:12,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:12,896 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 08:32:12,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702435554] [2023-08-24 08:32:12,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702435554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:12,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842545087] [2023-08-24 08:32:12,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:32:12,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:12,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:12,917 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 08:32:12,974 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 08:32:13,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:32:13,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:13,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 08:32:13,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:13,093 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 08:32:13,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:13,123 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:13,124 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 22 treesize of output 15 [2023-08-24 08:32:13,131 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:32:13,131 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 21 treesize of output 10 [2023-08-24 08:32:13,165 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 08:32:13,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842545087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:13,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:13,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 08:32:13,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022064686] [2023-08-24 08:32:13,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:13,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:32:13,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:13,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:32:13,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:32:13,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 08:32:13,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 334 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:13,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:13,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 08:32:13,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:13,292 INFO L124 PetriNetUnfolderBase]: 175/314 cut-off events. [2023-08-24 08:32:13,292 INFO L125 PetriNetUnfolderBase]: For 759/759 co-relation queries the response was YES. [2023-08-24 08:32:13,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1286 conditions, 314 events. 175/314 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1096 event pairs, 41 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 1254. Up to 262 conditions per place. [2023-08-24 08:32:13,294 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 48 selfloop transitions, 14 changer transitions 1/63 dead transitions. [2023-08-24 08:32:13,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 540 flow [2023-08-24 08:32:13,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:13,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:13,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 08:32:13,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711615487316422 [2023-08-24 08:32:13,310 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 08:32:13,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 08:32:13,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:13,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 08:32:13,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:13,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:13,313 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:13,313 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 334 flow. Second operand 7 states and 556 transitions. [2023-08-24 08:32:13,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 540 flow [2023-08-24 08:32:13,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 504 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-24 08:32:13,316 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 380 flow [2023-08-24 08:32:13,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=380, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2023-08-24 08:32:13,317 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 35 predicate places. [2023-08-24 08:32:13,317 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 380 flow [2023-08-24 08:32:13,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:13,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:13,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:13,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 08:32:13,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:13,522 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:13,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:13,522 INFO L85 PathProgramCache]: Analyzing trace with hash 711512376, now seen corresponding path program 5 times [2023-08-24 08:32:13,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:13,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796376545] [2023-08-24 08:32:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:13,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:13,773 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 08:32:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796376545] [2023-08-24 08:32:13,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796376545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973805540] [2023-08-24 08:32:13,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:32:13,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:13,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:13,789 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 08:32:13,790 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 08:32:13,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:13,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:13,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 08:32:13,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:13,930 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 08:32:13,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:13,985 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:13,985 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 14 [2023-08-24 08:32:14,013 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 08:32:14,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973805540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:14,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:14,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 08:32:14,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720933479] [2023-08-24 08:32:14,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:32:14,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:14,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:32:14,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:32:14,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 08:32:14,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 380 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:14,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 08:32:14,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:14,149 INFO L124 PetriNetUnfolderBase]: 209/373 cut-off events. [2023-08-24 08:32:14,149 INFO L125 PetriNetUnfolderBase]: For 1011/1011 co-relation queries the response was YES. [2023-08-24 08:32:14,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1553 conditions, 373 events. 209/373 cut-off events. For 1011/1011 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1379 event pairs, 35 based on Foata normal form. 1/373 useless extension candidates. Maximal degree in co-relation 1519. Up to 301 conditions per place. [2023-08-24 08:32:14,152 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 50 selfloop transitions, 18 changer transitions 1/69 dead transitions. [2023-08-24 08:32:14,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 631 flow [2023-08-24 08:32:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 556 transitions. [2023-08-24 08:32:14,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3711615487316422 [2023-08-24 08:32:14,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 556 transitions. [2023-08-24 08:32:14,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 556 transitions. [2023-08-24 08:32:14,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:14,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 556 transitions. [2023-08-24 08:32:14,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.42857142857143) internal successors, (556), 7 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,156 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,156 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 380 flow. Second operand 7 states and 556 transitions. [2023-08-24 08:32:14,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 631 flow [2023-08-24 08:32:14,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 592 flow, removed 13 selfloop flow, removed 3 redundant places. [2023-08-24 08:32:14,160 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 472 flow [2023-08-24 08:32:14,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=472, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2023-08-24 08:32:14,160 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 40 predicate places. [2023-08-24 08:32:14,160 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 472 flow [2023-08-24 08:32:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:14,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:14,174 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 08:32:14,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:14,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:14,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash 818579478, now seen corresponding path program 6 times [2023-08-24 08:32:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:14,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121858080] [2023-08-24 08:32:14,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:14,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:14,559 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 08:32:14,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121858080] [2023-08-24 08:32:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121858080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:14,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138144408] [2023-08-24 08:32:14,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:32:14,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:14,561 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 08:32:14,563 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 08:32:14,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:32:14,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:14,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 08:32:14,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:14,711 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 08:32:14,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:14,761 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:14,761 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 22 treesize of output 15 [2023-08-24 08:32:14,770 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:32:14,770 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 10 [2023-08-24 08:32:14,824 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 08:32:14,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138144408] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:14,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:14,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-24 08:32:14,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549483188] [2023-08-24 08:32:14,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:14,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 08:32:14,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:14,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 08:32:14,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-24 08:32:14,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 214 [2023-08-24 08:32:14,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 472 flow. Second operand has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:14,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 214 [2023-08-24 08:32:14,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:14,974 INFO L124 PetriNetUnfolderBase]: 225/402 cut-off events. [2023-08-24 08:32:14,974 INFO L125 PetriNetUnfolderBase]: For 1267/1267 co-relation queries the response was YES. [2023-08-24 08:32:14,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 402 events. 225/402 cut-off events. For 1267/1267 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1522 event pairs, 57 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 1706. Up to 350 conditions per place. [2023-08-24 08:32:14,976 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 56 selfloop transitions, 14 changer transitions 1/71 dead transitions. [2023-08-24 08:32:14,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 698 flow [2023-08-24 08:32:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:14,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:14,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 554 transitions. [2023-08-24 08:32:14,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.369826435246996 [2023-08-24 08:32:14,977 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 554 transitions. [2023-08-24 08:32:14,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 554 transitions. [2023-08-24 08:32:14,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:14,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 554 transitions. [2023-08-24 08:32:14,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.14285714285714) internal successors, (554), 7 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,999 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:14,999 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 472 flow. Second operand 7 states and 554 transitions. [2023-08-24 08:32:14,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 698 flow [2023-08-24 08:32:15,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 631 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-24 08:32:15,004 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 496 flow [2023-08-24 08:32:15,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2023-08-24 08:32:15,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 46 predicate places. [2023-08-24 08:32:15,005 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 496 flow [2023-08-24 08:32:15,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 75.63636363636364) internal successors, (832), 11 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:15,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:15,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:15,023 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 08:32:15,210 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,SelfDestructingSolverStorable10 [2023-08-24 08:32:15,210 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:15,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:15,210 INFO L85 PathProgramCache]: Analyzing trace with hash -570248544, now seen corresponding path program 7 times [2023-08-24 08:32:15,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:15,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186354675] [2023-08-24 08:32:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:15,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:15,286 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 08:32:15,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186354675] [2023-08-24 08:32:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186354675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823722010] [2023-08-24 08:32:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:32:15,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:15,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:15,288 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 08:32:15,290 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 08:32:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:15,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:32:15,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:15,408 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 08:32:15,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:15,447 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 08:32:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823722010] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:15,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:15,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 08:32:15,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228371813] [2023-08-24 08:32:15,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:15,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:32:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:32:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:32:15,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:15,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 496 flow. Second operand has 14 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:15,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:15,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:15,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:15,572 INFO L124 PetriNetUnfolderBase]: 371/696 cut-off events. [2023-08-24 08:32:15,572 INFO L125 PetriNetUnfolderBase]: For 2458/2483 co-relation queries the response was YES. [2023-08-24 08:32:15,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2880 conditions, 696 events. 371/696 cut-off events. For 2458/2483 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3400 event pairs, 151 based on Foata normal form. 56/742 useless extension candidates. Maximal degree in co-relation 2504. Up to 378 conditions per place. [2023-08-24 08:32:15,575 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 97 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2023-08-24 08:32:15,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 117 transitions, 1184 flow [2023-08-24 08:32:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:15,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 575 transitions. [2023-08-24 08:32:15,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38384512683578104 [2023-08-24 08:32:15,577 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 575 transitions. [2023-08-24 08:32:15,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 575 transitions. [2023-08-24 08:32:15,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:15,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 575 transitions. [2023-08-24 08:32:15,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.14285714285714) internal successors, (575), 7 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:15,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:15,580 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:15,580 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 496 flow. Second operand 7 states and 575 transitions. [2023-08-24 08:32:15,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 117 transitions, 1184 flow [2023-08-24 08:32:15,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 117 transitions, 1084 flow, removed 28 selfloop flow, removed 5 redundant places. [2023-08-24 08:32:15,587 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 664 flow [2023-08-24 08:32:15,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=664, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-24 08:32:15,587 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-24 08:32:15,587 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 664 flow [2023-08-24 08:32:15,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:15,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:15,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:15,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 08:32:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:15,793 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:15,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1307592954, now seen corresponding path program 8 times [2023-08-24 08:32:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:15,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473187305] [2023-08-24 08:32:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:15,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:15,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:15,858 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 08:32:15,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473187305] [2023-08-24 08:32:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473187305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819552360] [2023-08-24 08:32:15,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:15,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:15,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:15,860 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 08:32:15,862 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 08:32:15,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:15,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:15,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:32:15,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:15,987 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 08:32:15,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:16,028 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 08:32:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819552360] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:16,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:16,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 08:32:16,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864920704] [2023-08-24 08:32:16,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:16,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:32:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:16,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:32:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:32:16,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:16,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 664 flow. Second operand has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:16,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:16,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:16,146 INFO L124 PetriNetUnfolderBase]: 305/610 cut-off events. [2023-08-24 08:32:16,146 INFO L125 PetriNetUnfolderBase]: For 1934/1959 co-relation queries the response was YES. [2023-08-24 08:32:16,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2549 conditions, 610 events. 305/610 cut-off events. For 1934/1959 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3042 event pairs, 143 based on Foata normal form. 61/669 useless extension candidates. Maximal degree in co-relation 2214. Up to 380 conditions per place. [2023-08-24 08:32:16,150 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 52 selfloop transitions, 3 changer transitions 39/98 dead transitions. [2023-08-24 08:32:16,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 994 flow [2023-08-24 08:32:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 08:32:16,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 08:32:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 574 transitions. [2023-08-24 08:32:16,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38317757009345793 [2023-08-24 08:32:16,151 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 574 transitions. [2023-08-24 08:32:16,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 574 transitions. [2023-08-24 08:32:16,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:16,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 574 transitions. [2023-08-24 08:32:16,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 82.0) internal successors, (574), 7 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,154 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 214.0) internal successors, (1712), 8 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,154 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 664 flow. Second operand 7 states and 574 transitions. [2023-08-24 08:32:16,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 994 flow [2023-08-24 08:32:16,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 98 transitions, 976 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-24 08:32:16,163 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 541 flow [2023-08-24 08:32:16,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=541, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2023-08-24 08:32:16,164 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 58 predicate places. [2023-08-24 08:32:16,164 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 541 flow [2023-08-24 08:32:16,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.0) internal successors, (1092), 14 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:16,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:16,171 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 08:32:16,368 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,SelfDestructingSolverStorable12 [2023-08-24 08:32:16,369 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:16,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:16,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1822216859, now seen corresponding path program 9 times [2023-08-24 08:32:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:16,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108338193] [2023-08-24 08:32:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:16,474 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 08:32:16,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:16,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108338193] [2023-08-24 08:32:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108338193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850621750] [2023-08-24 08:32:16,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:32:16,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:16,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:16,476 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 08:32:16,478 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 08:32:16,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:32:16,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:16,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:32:16,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:16,604 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 08:32:16,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:16,650 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 08:32:16,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850621750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:16,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:16,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-24 08:32:16,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314375138] [2023-08-24 08:32:16,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:16,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 08:32:16,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 08:32:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-08-24 08:32:16,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:16,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 59 transitions, 541 flow. Second operand has 15 states, 15 states have (on average 78.06666666666666) internal successors, (1171), 15 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:16,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:16,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:16,767 INFO L124 PetriNetUnfolderBase]: 166/297 cut-off events. [2023-08-24 08:32:16,767 INFO L125 PetriNetUnfolderBase]: For 1513/1520 co-relation queries the response was YES. [2023-08-24 08:32:16,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 297 events. 166/297 cut-off events. For 1513/1520 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1047 event pairs, 28 based on Foata normal form. 51/347 useless extension candidates. Maximal degree in co-relation 1484. Up to 137 conditions per place. [2023-08-24 08:32:16,768 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 40 selfloop transitions, 26 changer transitions 0/70 dead transitions. [2023-08-24 08:32:16,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 70 transitions, 757 flow [2023-08-24 08:32:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:32:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:32:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2023-08-24 08:32:16,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732476635514019 [2023-08-24 08:32:16,770 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2023-08-24 08:32:16,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2023-08-24 08:32:16,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:16,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2023-08-24 08:32:16,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,773 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,773 INFO L175 Difference]: Start difference. First operand has 79 places, 59 transitions, 541 flow. Second operand 8 states and 639 transitions. [2023-08-24 08:32:16,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 70 transitions, 757 flow [2023-08-24 08:32:16,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 70 transitions, 607 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-08-24 08:32:16,777 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 491 flow [2023-08-24 08:32:16,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=491, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-24 08:32:16,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 51 predicate places. [2023-08-24 08:32:16,778 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 491 flow [2023-08-24 08:32:16,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.06666666666666) internal successors, (1171), 15 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:16,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:16,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:16,785 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 08:32:16,983 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,SelfDestructingSolverStorable13 [2023-08-24 08:32:16,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:16,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:16,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1101918323, now seen corresponding path program 10 times [2023-08-24 08:32:16,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:16,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172126280] [2023-08-24 08:32:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:17,059 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 08:32:17,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:17,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172126280] [2023-08-24 08:32:17,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172126280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:17,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575396767] [2023-08-24 08:32:17,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:32:17,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:17,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:17,061 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 08:32:17,063 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 08:32:17,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:32:17,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:17,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 08:32:17,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:17,181 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 08:32:17,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:17,225 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 08:32:17,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575396767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:17,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:17,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-24 08:32:17,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548099609] [2023-08-24 08:32:17,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:17,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 08:32:17,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:17,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 08:32:17,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 08:32:17,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:17,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 491 flow. Second operand has 14 states, 14 states have (on average 78.14285714285714) internal successors, (1094), 14 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:17,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:17,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:17,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:17,302 INFO L124 PetriNetUnfolderBase]: 120/214 cut-off events. [2023-08-24 08:32:17,302 INFO L125 PetriNetUnfolderBase]: For 1222/1228 co-relation queries the response was YES. [2023-08-24 08:32:17,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 214 events. 120/214 cut-off events. For 1222/1228 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 648 event pairs, 27 based on Foata normal form. 30/240 useless extension candidates. Maximal degree in co-relation 1110. Up to 116 conditions per place. [2023-08-24 08:32:17,303 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 41 selfloop transitions, 26 changer transitions 0/71 dead transitions. [2023-08-24 08:32:17,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 709 flow [2023-08-24 08:32:17,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 08:32:17,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 08:32:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 639 transitions. [2023-08-24 08:32:17,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3732476635514019 [2023-08-24 08:32:17,305 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 639 transitions. [2023-08-24 08:32:17,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 639 transitions. [2023-08-24 08:32:17,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:17,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 639 transitions. [2023-08-24 08:32:17,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.875) internal successors, (639), 8 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:17,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:17,308 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 214.0) internal successors, (1926), 9 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:17,308 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 491 flow. Second operand 8 states and 639 transitions. [2023-08-24 08:32:17,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 709 flow [2023-08-24 08:32:17,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 71 transitions, 627 flow, removed 25 selfloop flow, removed 5 redundant places. [2023-08-24 08:32:17,311 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 505 flow [2023-08-24 08:32:17,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=413, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=505, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2023-08-24 08:32:17,312 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-08-24 08:32:17,312 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 505 flow [2023-08-24 08:32:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.14285714285714) internal successors, (1094), 14 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:17,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:17,312 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:17,337 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 08:32:17,517 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,SelfDestructingSolverStorable14 [2023-08-24 08:32:17,517 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:17,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1642242531, now seen corresponding path program 11 times [2023-08-24 08:32:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:17,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073843176] [2023-08-24 08:32:17,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:17,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:18,243 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 08:32:18,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073843176] [2023-08-24 08:32:18,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073843176] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:18,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725849328] [2023-08-24 08:32:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:32:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:18,244 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 08:32:18,246 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 08:32:18,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:18,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:18,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjunts are in the unsatisfiable core [2023-08-24 08:32:18,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:18,383 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 08:32:18,413 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 08:32:18,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:32:18,535 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 08:32:18,623 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:18,625 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,625 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 31 treesize of output 14 [2023-08-24 08:32:18,643 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 08:32:18,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:18,795 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))))) (and (forall ((v_ArrVal_449 (Array Int Int))) (<= (+ .cse0 c_~counter~0) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse1 c_~A~0.offset) (select .cse1 .cse2))))) (forall ((v_ArrVal_449 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2))) (+ .cse0 c_~counter~0 1))))) is different from false [2023-08-24 08:32:18,805 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_~A~0.base)) (.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse2 (select .cse5 (+ c_~A~0.offset .cse6))) (.cse3 (select .cse5 (+ c_~A~0.offset .cse6 4))) (.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_449 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1))) (+ .cse2 c_~counter~0 .cse3 1))) (forall ((v_ArrVal_449 (Array Int Int))) (<= (+ .cse2 c_~counter~0 .cse3) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1)))))))) is different from false [2023-08-24 08:32:18,811 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset 4)) (.cse5 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select .cse5 c_~A~0.offset)) (.cse1 (select .cse5 .cse3))) (and (forall ((v_ArrVal_449 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) (select .cse2 .cse3))))) (forall ((v_ArrVal_449 (Array Int Int))) (< (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse3))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-08-24 08:32:18,837 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_449 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_448))) (< (let ((.cse0 (select (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse0 .cse1) (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse3 (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse3 .cse1) c_~counter~0 (select .cse3 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 1))))) (forall ((v_ArrVal_449 (Array Int Int)) (v_ArrVal_448 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_448))) (<= (let ((.cse4 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse4 .cse1) c_~counter~0 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (let ((.cse6 (select (store .cse5 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (+ (select .cse6 .cse1) (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))))))) is different from false [2023-08-24 08:32:18,845 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,845 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 94 treesize of output 59 [2023-08-24 08:32:18,849 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,849 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 212 treesize of output 172 [2023-08-24 08:32:18,854 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,854 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 70 treesize of output 58 [2023-08-24 08:32:18,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,859 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 31 treesize of output 25 [2023-08-24 08:32:18,872 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,872 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 95 treesize of output 60 [2023-08-24 08:32:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:18,879 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:18,879 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 90 treesize of output 70 [2023-08-24 08:32:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 5 not checked. [2023-08-24 08:32:18,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725849328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:18,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:18,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 30 [2023-08-24 08:32:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498108806] [2023-08-24 08:32:18,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:18,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:32:18,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:18,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:32:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=665, Unknown=6, NotChecked=220, Total=992 [2023-08-24 08:32:18,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:32:18,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 505 flow. Second operand has 32 states, 32 states have (on average 54.5625) internal successors, (1746), 32 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:18,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:18,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:32:18,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:19,710 INFO L124 PetriNetUnfolderBase]: 179/316 cut-off events. [2023-08-24 08:32:19,710 INFO L125 PetriNetUnfolderBase]: For 1787/1787 co-relation queries the response was YES. [2023-08-24 08:32:19,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 316 events. 179/316 cut-off events. For 1787/1787 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1040 event pairs, 13 based on Foata normal form. 1/317 useless extension candidates. Maximal degree in co-relation 1654. Up to 187 conditions per place. [2023-08-24 08:32:19,712 INFO L140 encePairwiseOnDemand]: 206/214 looper letters, 65 selfloop transitions, 38 changer transitions 1/104 dead transitions. [2023-08-24 08:32:19,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 104 transitions, 948 flow [2023-08-24 08:32:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:32:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:32:19,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 983 transitions. [2023-08-24 08:32:19,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27020340846619023 [2023-08-24 08:32:19,715 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 983 transitions. [2023-08-24 08:32:19,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 983 transitions. [2023-08-24 08:32:19,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:19,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 983 transitions. [2023-08-24 08:32:19,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.8235294117647) internal successors, (983), 17 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:19,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:19,722 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:19,722 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 505 flow. Second operand 17 states and 983 transitions. [2023-08-24 08:32:19,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 104 transitions, 948 flow [2023-08-24 08:32:19,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 104 transitions, 890 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-08-24 08:32:19,727 INFO L231 Difference]: Finished difference. Result has 88 places, 70 transitions, 684 flow [2023-08-24 08:32:19,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=463, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=684, PETRI_PLACES=88, PETRI_TRANSITIONS=70} [2023-08-24 08:32:19,728 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-08-24 08:32:19,728 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 70 transitions, 684 flow [2023-08-24 08:32:19,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 54.5625) internal successors, (1746), 32 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:19,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:19,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:19,736 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 08:32:19,933 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,SelfDestructingSolverStorable15 [2023-08-24 08:32:19,933 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:19,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash -2141350869, now seen corresponding path program 12 times [2023-08-24 08:32:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936414378] [2023-08-24 08:32:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:20,393 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 08:32:20,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:20,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936414378] [2023-08-24 08:32:20,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936414378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242577013] [2023-08-24 08:32:20,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:32:20,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:20,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:20,395 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 08:32:20,409 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 08:32:20,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:32:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:20,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:20,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:20,555 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:20,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:20,556 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 31 treesize of output 14 [2023-08-24 08:32:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:20,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:20,665 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:20,666 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 36 treesize of output 44 [2023-08-24 08:32:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:20,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242577013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:20,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:20,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 17 [2023-08-24 08:32:20,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179076646] [2023-08-24 08:32:20,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:20,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:32:20,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:20,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:32:20,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:32:20,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:20,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 70 transitions, 684 flow. Second operand has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:20,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:20,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:20,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:21,106 INFO L124 PetriNetUnfolderBase]: 243/425 cut-off events. [2023-08-24 08:32:21,106 INFO L125 PetriNetUnfolderBase]: For 2737/2737 co-relation queries the response was YES. [2023-08-24 08:32:21,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 425 events. 243/425 cut-off events. For 2737/2737 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1500 event pairs, 29 based on Foata normal form. 2/427 useless extension candidates. Maximal degree in co-relation 2365. Up to 314 conditions per place. [2023-08-24 08:32:21,109 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 81 selfloop transitions, 40 changer transitions 4/125 dead transitions. [2023-08-24 08:32:21,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 125 transitions, 1311 flow [2023-08-24 08:32:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 08:32:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 08:32:21,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1107 transitions. [2023-08-24 08:32:21,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3042880703683343 [2023-08-24 08:32:21,111 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1107 transitions. [2023-08-24 08:32:21,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1107 transitions. [2023-08-24 08:32:21,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:21,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1107 transitions. [2023-08-24 08:32:21,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.11764705882354) internal successors, (1107), 17 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:21,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:21,117 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 214.0) internal successors, (3852), 18 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:21,117 INFO L175 Difference]: Start difference. First operand has 88 places, 70 transitions, 684 flow. Second operand 17 states and 1107 transitions. [2023-08-24 08:32:21,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 125 transitions, 1311 flow [2023-08-24 08:32:21,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 125 transitions, 1172 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-08-24 08:32:21,124 INFO L231 Difference]: Finished difference. Result has 100 places, 92 transitions, 976 flow [2023-08-24 08:32:21,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=976, PETRI_PLACES=100, PETRI_TRANSITIONS=92} [2023-08-24 08:32:21,124 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-08-24 08:32:21,124 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 92 transitions, 976 flow [2023-08-24 08:32:21,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.05263157894737) internal successors, (1179), 19 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:21,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:21,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:21,131 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 08:32:21,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:21,329 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:21,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:21,329 INFO L85 PathProgramCache]: Analyzing trace with hash -466173589, now seen corresponding path program 13 times [2023-08-24 08:32:21,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:21,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772183752] [2023-08-24 08:32:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:21,760 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 08:32:21,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772183752] [2023-08-24 08:32:21,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772183752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:21,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280278800] [2023-08-24 08:32:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:32:21,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:21,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:21,762 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 08:32:21,763 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 08:32:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:21,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 08:32:21,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:22,028 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 08:32:22,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:22,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:22,139 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 36 treesize of output 44 [2023-08-24 08:32:22,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:22,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280278800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:22,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:22,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 08:32:22,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286529709] [2023-08-24 08:32:22,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:22,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:32:22,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:22,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:32:22,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:32:22,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:22,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 976 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:22,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:22,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:22,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:22,850 INFO L124 PetriNetUnfolderBase]: 296/514 cut-off events. [2023-08-24 08:32:22,851 INFO L125 PetriNetUnfolderBase]: For 3740/3740 co-relation queries the response was YES. [2023-08-24 08:32:22,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3142 conditions, 514 events. 296/514 cut-off events. For 3740/3740 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1887 event pairs, 38 based on Foata normal form. 2/516 useless extension candidates. Maximal degree in co-relation 3081. Up to 396 conditions per place. [2023-08-24 08:32:22,854 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 86 selfloop transitions, 50 changer transitions 2/138 dead transitions. [2023-08-24 08:32:22,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 138 transitions, 1578 flow [2023-08-24 08:32:22,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 08:32:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 08:32:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1418 transitions. [2023-08-24 08:32:22,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011894647408666 [2023-08-24 08:32:22,856 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1418 transitions. [2023-08-24 08:32:22,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1418 transitions. [2023-08-24 08:32:22,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:22,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1418 transitions. [2023-08-24 08:32:22,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.45454545454545) internal successors, (1418), 22 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:22,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 214.0) internal successors, (4922), 23 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:22,862 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 214.0) internal successors, (4922), 23 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:22,862 INFO L175 Difference]: Start difference. First operand has 100 places, 92 transitions, 976 flow. Second operand 22 states and 1418 transitions. [2023-08-24 08:32:22,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 138 transitions, 1578 flow [2023-08-24 08:32:22,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 138 transitions, 1374 flow, removed 92 selfloop flow, removed 6 redundant places. [2023-08-24 08:32:22,870 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 1109 flow [2023-08-24 08:32:22,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1109, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2023-08-24 08:32:22,870 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 99 predicate places. [2023-08-24 08:32:22,871 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 1109 flow [2023-08-24 08:32:22,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:22,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:22,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:22,883 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 08:32:23,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 08:32:23,075 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:23,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 157475593, now seen corresponding path program 14 times [2023-08-24 08:32:23,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:23,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029457971] [2023-08-24 08:32:23,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:23,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:23,732 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 08:32:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029457971] [2023-08-24 08:32:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029457971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341699927] [2023-08-24 08:32:23,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:23,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:23,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:23,733 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 08:32:23,736 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 08:32:23,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:23,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:23,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:23,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:23,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:24,088 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:24,088 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 42 treesize of output 45 [2023-08-24 08:32:24,129 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:24,129 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 08:32:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:24,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341699927] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:24,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:24,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-08-24 08:32:24,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663924102] [2023-08-24 08:32:24,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:24,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:32:24,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:32:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:32:24,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:32:24,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 1109 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:24,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:24,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:32:24,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:24,946 INFO L124 PetriNetUnfolderBase]: 371/633 cut-off events. [2023-08-24 08:32:24,946 INFO L125 PetriNetUnfolderBase]: For 5554/5554 co-relation queries the response was YES. [2023-08-24 08:32:24,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4025 conditions, 633 events. 371/633 cut-off events. For 5554/5554 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2412 event pairs, 52 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3957. Up to 521 conditions per place. [2023-08-24 08:32:24,950 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 110 selfloop transitions, 48 changer transitions 2/160 dead transitions. [2023-08-24 08:32:24,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 160 transitions, 1973 flow [2023-08-24 08:32:24,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:32:24,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:32:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1206 transitions. [2023-08-24 08:32:24,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2683578104138852 [2023-08-24 08:32:24,952 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1206 transitions. [2023-08-24 08:32:24,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1206 transitions. [2023-08-24 08:32:24,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:24,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1206 transitions. [2023-08-24 08:32:24,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.42857142857143) internal successors, (1206), 21 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:24,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:24,958 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:24,958 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 1109 flow. Second operand 21 states and 1206 transitions. [2023-08-24 08:32:24,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 160 transitions, 1973 flow [2023-08-24 08:32:24,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1750 flow, removed 76 selfloop flow, removed 18 redundant places. [2023-08-24 08:32:24,969 INFO L231 Difference]: Finished difference. Result has 129 places, 130 transitions, 1486 flow [2023-08-24 08:32:24,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1486, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2023-08-24 08:32:24,970 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 108 predicate places. [2023-08-24 08:32:24,970 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 1486 flow [2023-08-24 08:32:24,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:24,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:24,970 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:24,977 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 08:32:25,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:25,175 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:25,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash -683630431, now seen corresponding path program 15 times [2023-08-24 08:32:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:25,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495893527] [2023-08-24 08:32:25,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:25,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:25,668 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 08:32:25,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:25,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495893527] [2023-08-24 08:32:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495893527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:25,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200963869] [2023-08-24 08:32:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:32:25,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:25,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:25,670 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 08:32:25,671 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 08:32:25,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:32:25,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:25,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:25,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:25,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:25,982 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:25,982 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 42 treesize of output 45 [2023-08-24 08:32:26,026 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:26,026 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 08:32:26,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:26,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200963869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:26,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:26,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-24 08:32:26,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540034192] [2023-08-24 08:32:26,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:26,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:32:26,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:32:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:32:26,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:26,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 1486 flow. Second operand has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:26,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:26,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:26,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:26,594 INFO L124 PetriNetUnfolderBase]: 453/774 cut-off events. [2023-08-24 08:32:26,594 INFO L125 PetriNetUnfolderBase]: For 8111/8111 co-relation queries the response was YES. [2023-08-24 08:32:26,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5198 conditions, 774 events. 453/774 cut-off events. For 8111/8111 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3185 event pairs, 69 based on Foata normal form. 3/777 useless extension candidates. Maximal degree in co-relation 5125. Up to 641 conditions per place. [2023-08-24 08:32:26,599 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 147 selfloop transitions, 36 changer transitions 3/186 dead transitions. [2023-08-24 08:32:26,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 2476 flow [2023-08-24 08:32:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:32:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:32:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1230 transitions. [2023-08-24 08:32:26,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025086079685194 [2023-08-24 08:32:26,601 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1230 transitions. [2023-08-24 08:32:26,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1230 transitions. [2023-08-24 08:32:26,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:26,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1230 transitions. [2023-08-24 08:32:26,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.73684210526316) internal successors, (1230), 19 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:26,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:26,606 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:26,607 INFO L175 Difference]: Start difference. First operand has 129 places, 130 transitions, 1486 flow. Second operand 19 states and 1230 transitions. [2023-08-24 08:32:26,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 2476 flow [2023-08-24 08:32:26,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 186 transitions, 2089 flow, removed 177 selfloop flow, removed 11 redundant places. [2023-08-24 08:32:26,623 INFO L231 Difference]: Finished difference. Result has 142 places, 149 transitions, 1630 flow [2023-08-24 08:32:26,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1630, PETRI_PLACES=142, PETRI_TRANSITIONS=149} [2023-08-24 08:32:26,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 121 predicate places. [2023-08-24 08:32:26,624 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 149 transitions, 1630 flow [2023-08-24 08:32:26,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:26,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:26,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:26,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 08:32:26,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:26,828 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:26,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:26,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1814150431, now seen corresponding path program 16 times [2023-08-24 08:32:26,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:26,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957678863] [2023-08-24 08:32:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:26,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:27,250 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 08:32:27,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957678863] [2023-08-24 08:32:27,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957678863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:27,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488396642] [2023-08-24 08:32:27,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:32:27,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:27,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:27,252 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 08:32:27,254 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 08:32:27,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:32:27,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:27,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:27,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:27,523 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:27,525 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:27,525 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 31 treesize of output 14 [2023-08-24 08:32:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:27,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:27,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:27,629 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 42 treesize of output 45 [2023-08-24 08:32:27,659 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:27,660 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 08:32:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488396642] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:27,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:27,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-24 08:32:27,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575837754] [2023-08-24 08:32:27,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:32:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:32:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:32:27,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:27,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 149 transitions, 1630 flow. Second operand has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:27,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:27,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:27,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:28,149 INFO L124 PetriNetUnfolderBase]: 510/871 cut-off events. [2023-08-24 08:32:28,149 INFO L125 PetriNetUnfolderBase]: For 10065/10065 co-relation queries the response was YES. [2023-08-24 08:32:28,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 871 events. 510/871 cut-off events. For 10065/10065 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3730 event pairs, 75 based on Foata normal form. 2/871 useless extension candidates. Maximal degree in co-relation 5746. Up to 749 conditions per place. [2023-08-24 08:32:28,154 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 151 selfloop transitions, 48 changer transitions 2/201 dead transitions. [2023-08-24 08:32:28,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 201 transitions, 2564 flow [2023-08-24 08:32:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:32:28,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:32:28,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1233 transitions. [2023-08-24 08:32:28,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30324643384161337 [2023-08-24 08:32:28,156 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1233 transitions. [2023-08-24 08:32:28,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1233 transitions. [2023-08-24 08:32:28,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:28,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1233 transitions. [2023-08-24 08:32:28,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.89473684210526) internal successors, (1233), 19 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:28,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:28,161 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:28,161 INFO L175 Difference]: Start difference. First operand has 142 places, 149 transitions, 1630 flow. Second operand 19 states and 1233 transitions. [2023-08-24 08:32:28,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 201 transitions, 2564 flow [2023-08-24 08:32:28,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 201 transitions, 2166 flow, removed 185 selfloop flow, removed 9 redundant places. [2023-08-24 08:32:28,182 INFO L231 Difference]: Finished difference. Result has 157 places, 167 transitions, 1755 flow [2023-08-24 08:32:28,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1755, PETRI_PLACES=157, PETRI_TRANSITIONS=167} [2023-08-24 08:32:28,183 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 136 predicate places. [2023-08-24 08:32:28,183 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 167 transitions, 1755 flow [2023-08-24 08:32:28,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.0) internal successors, (1488), 24 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:28,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:28,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:28,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-24 08:32:28,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:28,387 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:28,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:28,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1547191255, now seen corresponding path program 17 times [2023-08-24 08:32:28,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:28,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197120090] [2023-08-24 08:32:28,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:28,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:28,941 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 08:32:28,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197120090] [2023-08-24 08:32:28,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197120090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777104514] [2023-08-24 08:32:28,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:32:28,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:28,942 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 08:32:28,945 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 08:32:29,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:32:29,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:29,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 08:32:29,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:29,259 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 08:32:29,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:29,374 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:29,375 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 42 treesize of output 45 [2023-08-24 08:32:29,435 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:29,435 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 08:32:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:29,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777104514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:29,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:29,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 25 [2023-08-24 08:32:29,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254994843] [2023-08-24 08:32:29,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:29,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:32:29,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:29,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:32:29,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-24 08:32:29,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:32:29,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 167 transitions, 1755 flow. Second operand has 27 states, 27 states have (on average 54.77777777777778) internal successors, (1479), 27 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:29,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:29,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:32:29,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:30,306 INFO L124 PetriNetUnfolderBase]: 569/982 cut-off events. [2023-08-24 08:32:30,307 INFO L125 PetriNetUnfolderBase]: For 14171/14171 co-relation queries the response was YES. [2023-08-24 08:32:30,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6803 conditions, 982 events. 569/982 cut-off events. For 14171/14171 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4436 event pairs, 104 based on Foata normal form. 2/982 useless extension candidates. Maximal degree in co-relation 6717. Up to 834 conditions per place. [2023-08-24 08:32:30,314 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 165 selfloop transitions, 52 changer transitions 4/221 dead transitions. [2023-08-24 08:32:30,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 221 transitions, 2711 flow [2023-08-24 08:32:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:32:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:32:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1212 transitions. [2023-08-24 08:32:30,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2696929238985314 [2023-08-24 08:32:30,315 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1212 transitions. [2023-08-24 08:32:30,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1212 transitions. [2023-08-24 08:32:30,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:30,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1212 transitions. [2023-08-24 08:32:30,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 57.714285714285715) internal successors, (1212), 21 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:30,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:30,320 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:30,320 INFO L175 Difference]: Start difference. First operand has 157 places, 167 transitions, 1755 flow. Second operand 21 states and 1212 transitions. [2023-08-24 08:32:30,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 221 transitions, 2711 flow [2023-08-24 08:32:30,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 221 transitions, 2454 flow, removed 111 selfloop flow, removed 11 redundant places. [2023-08-24 08:32:30,349 INFO L231 Difference]: Finished difference. Result has 171 places, 180 transitions, 1958 flow [2023-08-24 08:32:30,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1498, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1958, PETRI_PLACES=171, PETRI_TRANSITIONS=180} [2023-08-24 08:32:30,349 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 150 predicate places. [2023-08-24 08:32:30,349 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 180 transitions, 1958 flow [2023-08-24 08:32:30,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.77777777777778) internal successors, (1479), 27 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:30,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:30,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:30,357 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 08:32:30,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:30,557 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:30,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash -763165645, now seen corresponding path program 18 times [2023-08-24 08:32:30,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:30,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034950259] [2023-08-24 08:32:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:30,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:31,073 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 08:32:31,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034950259] [2023-08-24 08:32:31,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034950259] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:31,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498849811] [2023-08-24 08:32:31,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:32:31,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:31,074 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 08:32:31,077 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 08:32:31,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:32:31,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:31,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-24 08:32:31,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:32:31,268 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 08:32:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:31,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:31,483 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_688 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_688) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2))))) (forall ((v_ArrVal_688 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_688) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse2)) (+ (select .cse3 .cse1) c_~counter~0 1)))))) is different from false [2023-08-24 08:32:31,502 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:31,502 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 74 treesize of output 73 [2023-08-24 08:32:31,513 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:31,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-08-24 08:32:31,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:31,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498849811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:31,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:31,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-24 08:32:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580123466] [2023-08-24 08:32:31,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:31,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:32:31,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:31,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:32:31,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=707, Unknown=1, NotChecked=54, Total=870 [2023-08-24 08:32:31,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 08:32:31,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 180 transitions, 1958 flow. Second operand has 30 states, 30 states have (on average 57.666666666666664) internal successors, (1730), 30 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:31,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:31,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 08:32:31,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:32,320 INFO L124 PetriNetUnfolderBase]: 619/1061 cut-off events. [2023-08-24 08:32:32,321 INFO L125 PetriNetUnfolderBase]: For 16944/16944 co-relation queries the response was YES. [2023-08-24 08:32:32,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7573 conditions, 1061 events. 619/1061 cut-off events. For 16944/16944 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4855 event pairs, 93 based on Foata normal form. 1/1062 useless extension candidates. Maximal degree in co-relation 7481. Up to 874 conditions per place. [2023-08-24 08:32:32,328 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 154 selfloop transitions, 73 changer transitions 1/228 dead transitions. [2023-08-24 08:32:32,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2988 flow [2023-08-24 08:32:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 08:32:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 08:32:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1208 transitions. [2023-08-24 08:32:32,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2822429906542056 [2023-08-24 08:32:32,331 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1208 transitions. [2023-08-24 08:32:32,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1208 transitions. [2023-08-24 08:32:32,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:32,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1208 transitions. [2023-08-24 08:32:32,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.4) internal successors, (1208), 20 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:32,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:32,336 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:32,336 INFO L175 Difference]: Start difference. First operand has 171 places, 180 transitions, 1958 flow. Second operand 20 states and 1208 transitions. [2023-08-24 08:32:32,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2988 flow [2023-08-24 08:32:32,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 228 transitions, 2727 flow, removed 105 selfloop flow, removed 15 redundant places. [2023-08-24 08:32:32,372 INFO L231 Difference]: Finished difference. Result has 180 places, 200 transitions, 2387 flow [2023-08-24 08:32:32,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1701, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2387, PETRI_PLACES=180, PETRI_TRANSITIONS=200} [2023-08-24 08:32:32,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 159 predicate places. [2023-08-24 08:32:32,372 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 200 transitions, 2387 flow [2023-08-24 08:32:32,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 57.666666666666664) internal successors, (1730), 30 states have internal predecessors, (1730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:32,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:32,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:32,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-24 08:32:32,577 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,SelfDestructingSolverStorable22 [2023-08-24 08:32:32,578 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:32,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:32,578 INFO L85 PathProgramCache]: Analyzing trace with hash 43558707, now seen corresponding path program 19 times [2023-08-24 08:32:32,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:32,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023099390] [2023-08-24 08:32:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:32,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:32,992 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 08:32:32,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:32,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023099390] [2023-08-24 08:32:32,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023099390] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:32,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947810769] [2023-08-24 08:32:32,993 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:32:32,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:32,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:33,013 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 08:32:33,014 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 08:32:33,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:33,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 08:32:33,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:33,309 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 08:32:33,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:33,406 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:33,406 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 42 treesize of output 45 [2023-08-24 08:32:33,444 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:33,444 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 08:32:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:33,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947810769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:33,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:33,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 08:32:33,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213842813] [2023-08-24 08:32:33,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:33,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:32:33,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:33,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:32:33,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:32:33,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:33,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 200 transitions, 2387 flow. Second operand has 26 states, 26 states have (on average 61.96153846153846) internal successors, (1611), 26 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:33,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:33,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:33,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:34,168 INFO L124 PetriNetUnfolderBase]: 685/1172 cut-off events. [2023-08-24 08:32:34,168 INFO L125 PetriNetUnfolderBase]: For 22325/22325 co-relation queries the response was YES. [2023-08-24 08:32:34,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8931 conditions, 1172 events. 685/1172 cut-off events. For 22325/22325 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5481 event pairs, 115 based on Foata normal form. 2/1174 useless extension candidates. Maximal degree in co-relation 8835. Up to 1060 conditions per place. [2023-08-24 08:32:34,183 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 204 selfloop transitions, 48 changer transitions 4/256 dead transitions. [2023-08-24 08:32:34,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 256 transitions, 3711 flow [2023-08-24 08:32:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:32:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:32:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1230 transitions. [2023-08-24 08:32:34,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3025086079685194 [2023-08-24 08:32:34,191 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1230 transitions. [2023-08-24 08:32:34,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1230 transitions. [2023-08-24 08:32:34,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:34,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1230 transitions. [2023-08-24 08:32:34,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.73684210526316) internal successors, (1230), 19 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:34,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:34,200 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:34,200 INFO L175 Difference]: Start difference. First operand has 180 places, 200 transitions, 2387 flow. Second operand 19 states and 1230 transitions. [2023-08-24 08:32:34,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 256 transitions, 3711 flow [2023-08-24 08:32:34,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 256 transitions, 3232 flow, removed 206 selfloop flow, removed 13 redundant places. [2023-08-24 08:32:34,262 INFO L231 Difference]: Finished difference. Result has 192 places, 227 transitions, 2727 flow [2023-08-24 08:32:34,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=1955, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2727, PETRI_PLACES=192, PETRI_TRANSITIONS=227} [2023-08-24 08:32:34,263 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-08-24 08:32:34,263 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 227 transitions, 2727 flow [2023-08-24 08:32:34,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.96153846153846) internal successors, (1611), 26 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:34,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:34,263 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:34,268 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 08:32:34,467 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,SelfDestructingSolverStorable23 [2023-08-24 08:32:34,468 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:34,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 806555017, now seen corresponding path program 20 times [2023-08-24 08:32:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:34,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535271367] [2023-08-24 08:32:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:34,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:34,939 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 08:32:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:34,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535271367] [2023-08-24 08:32:34,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535271367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:34,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244384551] [2023-08-24 08:32:34,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:34,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:34,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:34,965 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 08:32:34,968 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 08:32:35,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:35,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:35,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-24 08:32:35,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:35,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:32:35,164 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 08:32:35,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:35,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:35,467 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:35,467 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 74 treesize of output 73 [2023-08-24 08:32:35,481 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:35,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 31 [2023-08-24 08:32:35,526 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244384551] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:35,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:35,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-24 08:32:35,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133294253] [2023-08-24 08:32:35,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:35,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:32:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:35,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:32:35,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=759, Unknown=5, NotChecked=0, Total=870 [2023-08-24 08:32:35,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 08:32:35,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 227 transitions, 2727 flow. Second operand has 30 states, 30 states have (on average 57.56666666666667) internal successors, (1727), 30 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:35,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:35,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 08:32:35,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:36,486 INFO L124 PetriNetUnfolderBase]: 720/1234 cut-off events. [2023-08-24 08:32:36,486 INFO L125 PetriNetUnfolderBase]: For 23273/23273 co-relation queries the response was YES. [2023-08-24 08:32:36,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9218 conditions, 1234 events. 720/1234 cut-off events. For 23273/23273 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5868 event pairs, 99 based on Foata normal form. 1/1233 useless extension candidates. Maximal degree in co-relation 9116. Up to 954 conditions per place. [2023-08-24 08:32:36,495 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 158 selfloop transitions, 104 changer transitions 1/263 dead transitions. [2023-08-24 08:32:36,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 263 transitions, 3742 flow [2023-08-24 08:32:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 08:32:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 08:32:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1207 transitions. [2023-08-24 08:32:36,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820093457943925 [2023-08-24 08:32:36,497 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1207 transitions. [2023-08-24 08:32:36,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1207 transitions. [2023-08-24 08:32:36,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:36,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1207 transitions. [2023-08-24 08:32:36,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.35) internal successors, (1207), 20 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:36,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:36,504 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 214.0) internal successors, (4494), 21 states have internal predecessors, (4494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:36,504 INFO L175 Difference]: Start difference. First operand has 192 places, 227 transitions, 2727 flow. Second operand 20 states and 1207 transitions. [2023-08-24 08:32:36,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 263 transitions, 3742 flow [2023-08-24 08:32:36,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 263 transitions, 3274 flow, removed 223 selfloop flow, removed 7 redundant places. [2023-08-24 08:32:36,555 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 2807 flow [2023-08-24 08:32:36,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2263, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2807, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2023-08-24 08:32:36,555 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-08-24 08:32:36,555 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 2807 flow [2023-08-24 08:32:36,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 57.56666666666667) internal successors, (1727), 30 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:36,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:36,556 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:36,571 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 08:32:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:36,760 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:36,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:36,761 INFO L85 PathProgramCache]: Analyzing trace with hash -779110419, now seen corresponding path program 21 times [2023-08-24 08:32:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745457505] [2023-08-24 08:32:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:37,215 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 08:32:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:37,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745457505] [2023-08-24 08:32:37,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745457505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:37,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833580528] [2023-08-24 08:32:37,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:32:37,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:37,217 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 08:32:37,219 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 08:32:37,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:32:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:37,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:37,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:37,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:37,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:37,569 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:37,570 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 35 treesize of output 43 [2023-08-24 08:32:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833580528] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:37,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:37,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 21 [2023-08-24 08:32:37,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695081188] [2023-08-24 08:32:37,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:37,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:32:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:32:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:32:37,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:37,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 2807 flow. Second operand has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:37,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:37,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:37,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:38,201 INFO L124 PetriNetUnfolderBase]: 754/1293 cut-off events. [2023-08-24 08:32:38,201 INFO L125 PetriNetUnfolderBase]: For 23986/23986 co-relation queries the response was YES. [2023-08-24 08:32:38,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9553 conditions, 1293 events. 754/1293 cut-off events. For 23986/23986 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6237 event pairs, 122 based on Foata normal form. 1/1292 useless extension candidates. Maximal degree in co-relation 9446. Up to 1170 conditions per place. [2023-08-24 08:32:38,210 INFO L140 encePairwiseOnDemand]: 206/214 looper letters, 218 selfloop transitions, 47 changer transitions 1/266 dead transitions. [2023-08-24 08:32:38,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 266 transitions, 3734 flow [2023-08-24 08:32:38,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:32:38,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:32:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1027 transitions. [2023-08-24 08:32:38,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29994158878504673 [2023-08-24 08:32:38,212 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1027 transitions. [2023-08-24 08:32:38,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1027 transitions. [2023-08-24 08:32:38,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:38,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1027 transitions. [2023-08-24 08:32:38,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.1875) internal successors, (1027), 16 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:38,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 214.0) internal successors, (3638), 17 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:38,215 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 214.0) internal successors, (3638), 17 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:38,215 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 2807 flow. Second operand 16 states and 1027 transitions. [2023-08-24 08:32:38,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 266 transitions, 3734 flow [2023-08-24 08:32:38,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 266 transitions, 3428 flow, removed 101 selfloop flow, removed 17 redundant places. [2023-08-24 08:32:38,270 INFO L231 Difference]: Finished difference. Result has 209 places, 245 transitions, 2857 flow [2023-08-24 08:32:38,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2857, PETRI_PLACES=209, PETRI_TRANSITIONS=245} [2023-08-24 08:32:38,271 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 188 predicate places. [2023-08-24 08:32:38,271 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 245 transitions, 2857 flow [2023-08-24 08:32:38,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.0) internal successors, (1426), 23 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:38,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:38,275 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 08:32:38,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:38,475 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:38,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1137570005, now seen corresponding path program 22 times [2023-08-24 08:32:38,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:38,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967313507] [2023-08-24 08:32:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:38,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:38,883 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 08:32:38,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:38,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967313507] [2023-08-24 08:32:38,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967313507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:38,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879739654] [2023-08-24 08:32:38,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:32:38,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:38,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:38,890 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 08:32:38,892 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 08:32:38,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:32:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:38,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 08:32:38,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:39,149 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 08:32:39,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:39,250 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:39,250 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 35 treesize of output 43 [2023-08-24 08:32:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:39,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879739654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:39,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:39,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 08:32:39,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394492984] [2023-08-24 08:32:39,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:39,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:32:39,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:39,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:32:39,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:32:39,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:39,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 245 transitions, 2857 flow. Second operand has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:39,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:39,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:39,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:39,920 INFO L124 PetriNetUnfolderBase]: 807/1382 cut-off events. [2023-08-24 08:32:39,920 INFO L125 PetriNetUnfolderBase]: For 25146/25146 co-relation queries the response was YES. [2023-08-24 08:32:39,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10357 conditions, 1382 events. 807/1382 cut-off events. For 25146/25146 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6773 event pairs, 140 based on Foata normal form. 2/1382 useless extension candidates. Maximal degree in co-relation 10249. Up to 1269 conditions per place. [2023-08-24 08:32:39,932 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 236 selfloop transitions, 50 changer transitions 4/290 dead transitions. [2023-08-24 08:32:39,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 290 transitions, 4190 flow [2023-08-24 08:32:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:32:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:32:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1223 transitions. [2023-08-24 08:32:39,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30078701426463356 [2023-08-24 08:32:39,954 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1223 transitions. [2023-08-24 08:32:39,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1223 transitions. [2023-08-24 08:32:39,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:39,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1223 transitions. [2023-08-24 08:32:39,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 64.36842105263158) internal successors, (1223), 19 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:39,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:39,957 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 214.0) internal successors, (4280), 20 states have internal predecessors, (4280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:39,957 INFO L175 Difference]: Start difference. First operand has 209 places, 245 transitions, 2857 flow. Second operand 19 states and 1223 transitions. [2023-08-24 08:32:39,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 290 transitions, 4190 flow [2023-08-24 08:32:40,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 290 transitions, 3982 flow, removed 77 selfloop flow, removed 11 redundant places. [2023-08-24 08:32:40,026 INFO L231 Difference]: Finished difference. Result has 221 places, 264 transitions, 3393 flow [2023-08-24 08:32:40,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3393, PETRI_PLACES=221, PETRI_TRANSITIONS=264} [2023-08-24 08:32:40,026 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 200 predicate places. [2023-08-24 08:32:40,027 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 264 transitions, 3393 flow [2023-08-24 08:32:40,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.88461538461539) internal successors, (1609), 26 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:40,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:40,027 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:40,033 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 08:32:40,231 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,SelfDestructingSolverStorable26 [2023-08-24 08:32:40,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:40,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:40,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1480436073, now seen corresponding path program 23 times [2023-08-24 08:32:40,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:40,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298298913] [2023-08-24 08:32:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:40,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:40,652 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 08:32:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298298913] [2023-08-24 08:32:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298298913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911970270] [2023-08-24 08:32:40,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:32:40,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:40,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:40,663 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 08:32:40,741 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 08:32:40,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:32:40,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:40,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 73 conjunts are in the unsatisfiable core [2023-08-24 08:32:40,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:40,979 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 08:32:40,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:41,106 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:41,106 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 35 treesize of output 43 [2023-08-24 08:32:41,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:41,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911970270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:41,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:41,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-24 08:32:41,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079943843] [2023-08-24 08:32:41,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:32:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:41,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:32:41,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:32:41,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:41,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 264 transitions, 3393 flow. Second operand has 26 states, 26 states have (on average 61.84615384615385) internal successors, (1608), 26 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:41,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:41,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:41,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:42,037 INFO L124 PetriNetUnfolderBase]: 872/1495 cut-off events. [2023-08-24 08:32:42,038 INFO L125 PetriNetUnfolderBase]: For 32904/32904 co-relation queries the response was YES. [2023-08-24 08:32:42,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12007 conditions, 1495 events. 872/1495 cut-off events. For 32904/32904 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7515 event pairs, 149 based on Foata normal form. 2/1495 useless extension candidates. Maximal degree in co-relation 11894. Up to 1341 conditions per place. [2023-08-24 08:32:42,050 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 249 selfloop transitions, 65 changer transitions 2/316 dead transitions. [2023-08-24 08:32:42,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 316 transitions, 4703 flow [2023-08-24 08:32:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:32:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:32:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1611 transitions. [2023-08-24 08:32:42,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011214953271028 [2023-08-24 08:32:42,061 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1611 transitions. [2023-08-24 08:32:42,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1611 transitions. [2023-08-24 08:32:42,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:42,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1611 transitions. [2023-08-24 08:32:42,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.44) internal successors, (1611), 25 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:42,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:42,066 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:42,066 INFO L175 Difference]: Start difference. First operand has 221 places, 264 transitions, 3393 flow. Second operand 25 states and 1611 transitions. [2023-08-24 08:32:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 316 transitions, 4703 flow [2023-08-24 08:32:42,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 316 transitions, 4180 flow, removed 241 selfloop flow, removed 11 redundant places. [2023-08-24 08:32:42,151 INFO L231 Difference]: Finished difference. Result has 240 places, 279 transitions, 3482 flow [2023-08-24 08:32:42,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3482, PETRI_PLACES=240, PETRI_TRANSITIONS=279} [2023-08-24 08:32:42,152 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 219 predicate places. [2023-08-24 08:32:42,152 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 279 transitions, 3482 flow [2023-08-24 08:32:42,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 61.84615384615385) internal successors, (1608), 26 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:42,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:42,152 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:42,162 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 08:32:42,357 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,SelfDestructingSolverStorable27 [2023-08-24 08:32:42,357 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:42,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2017810507, now seen corresponding path program 24 times [2023-08-24 08:32:42,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:42,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332438914] [2023-08-24 08:32:42,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:42,841 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 08:32:42,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332438914] [2023-08-24 08:32:42,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332438914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:42,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126782664] [2023-08-24 08:32:42,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:32:42,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:42,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:42,845 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 08:32:42,847 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 08:32:42,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:32:42,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:42,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:42,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:43,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:43,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:43,181 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 42 treesize of output 45 [2023-08-24 08:32:43,221 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:43,221 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 08:32:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:43,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126782664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:43,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:43,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-08-24 08:32:43,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300278083] [2023-08-24 08:32:43,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:43,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:32:43,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:43,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:32:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:32:43,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:32:43,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 279 transitions, 3482 flow. Second operand has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:43,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:43,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:32:43,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:43,883 INFO L124 PetriNetUnfolderBase]: 925/1584 cut-off events. [2023-08-24 08:32:43,884 INFO L125 PetriNetUnfolderBase]: For 41723/41723 co-relation queries the response was YES. [2023-08-24 08:32:43,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13155 conditions, 1584 events. 925/1584 cut-off events. For 41723/41723 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8057 event pairs, 158 based on Foata normal form. 2/1584 useless extension candidates. Maximal degree in co-relation 13036. Up to 1465 conditions per place. [2023-08-24 08:32:43,898 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 266 selfloop transitions, 55 changer transitions 4/325 dead transitions. [2023-08-24 08:32:43,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 325 transitions, 4997 flow [2023-08-24 08:32:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:32:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:32:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1034 transitions. [2023-08-24 08:32:43,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2684319833852544 [2023-08-24 08:32:43,919 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1034 transitions. [2023-08-24 08:32:43,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1034 transitions. [2023-08-24 08:32:43,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:43,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1034 transitions. [2023-08-24 08:32:43,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 57.44444444444444) internal successors, (1034), 18 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:43,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 214.0) internal successors, (4066), 19 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:43,924 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 214.0) internal successors, (4066), 19 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:43,924 INFO L175 Difference]: Start difference. First operand has 240 places, 279 transitions, 3482 flow. Second operand 18 states and 1034 transitions. [2023-08-24 08:32:43,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 325 transitions, 4997 flow [2023-08-24 08:32:44,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 325 transitions, 4620 flow, removed 158 selfloop flow, removed 16 redundant places. [2023-08-24 08:32:44,035 INFO L231 Difference]: Finished difference. Result has 246 places, 300 transitions, 3961 flow [2023-08-24 08:32:44,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3961, PETRI_PLACES=246, PETRI_TRANSITIONS=300} [2023-08-24 08:32:44,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 225 predicate places. [2023-08-24 08:32:44,036 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 300 transitions, 3961 flow [2023-08-24 08:32:44,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.84615384615385) internal successors, (1426), 26 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:44,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:44,036 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:44,041 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 08:32:44,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 08:32:44,239 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:44,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:44,239 INFO L85 PathProgramCache]: Analyzing trace with hash 340849289, now seen corresponding path program 25 times [2023-08-24 08:32:44,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:44,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703773712] [2023-08-24 08:32:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:44,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:44,651 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 08:32:44,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703773712] [2023-08-24 08:32:44,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703773712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:44,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683259453] [2023-08-24 08:32:44,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:32:44,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:44,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:44,653 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 08:32:44,655 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 08:32:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:44,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:44,761 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:44,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:44,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:44,990 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:44,990 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 42 treesize of output 45 [2023-08-24 08:32:45,029 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:45,030 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 08:32:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:45,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683259453] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:45,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:45,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-24 08:32:45,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570831263] [2023-08-24 08:32:45,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:45,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 08:32:45,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 08:32:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-08-24 08:32:45,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:45,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 300 transitions, 3961 flow. Second operand has 25 states, 25 states have (on average 61.88) internal successors, (1547), 25 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 08:32:45,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:45,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:45,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:45,824 INFO L124 PetriNetUnfolderBase]: 984/1687 cut-off events. [2023-08-24 08:32:45,824 INFO L125 PetriNetUnfolderBase]: For 50315/50315 co-relation queries the response was YES. [2023-08-24 08:32:45,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14609 conditions, 1687 events. 984/1687 cut-off events. For 50315/50315 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 8730 event pairs, 171 based on Foata normal form. 2/1687 useless extension candidates. Maximal degree in co-relation 14484. Up to 1548 conditions per place. [2023-08-24 08:32:45,837 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 290 selfloop transitions, 57 changer transitions 2/349 dead transitions. [2023-08-24 08:32:45,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 349 transitions, 5425 flow [2023-08-24 08:32:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:32:45,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:32:45,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1484 transitions. [2023-08-24 08:32:45,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30150345388053634 [2023-08-24 08:32:45,854 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1484 transitions. [2023-08-24 08:32:45,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1484 transitions. [2023-08-24 08:32:45,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:45,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1484 transitions. [2023-08-24 08:32:45,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.52173913043478) internal successors, (1484), 23 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:45,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 214.0) internal successors, (5136), 24 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:45,858 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 214.0) internal successors, (5136), 24 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:45,858 INFO L175 Difference]: Start difference. First operand has 246 places, 300 transitions, 3961 flow. Second operand 23 states and 1484 transitions. [2023-08-24 08:32:45,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 349 transitions, 5425 flow [2023-08-24 08:32:45,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 349 transitions, 4836 flow, removed 277 selfloop flow, removed 9 redundant places. [2023-08-24 08:32:45,991 INFO L231 Difference]: Finished difference. Result has 265 places, 313 transitions, 4008 flow [2023-08-24 08:32:45,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4008, PETRI_PLACES=265, PETRI_TRANSITIONS=313} [2023-08-24 08:32:45,991 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-08-24 08:32:45,991 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 313 transitions, 4008 flow [2023-08-24 08:32:45,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.88) internal successors, (1547), 25 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 08:32:45,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:45,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:45,998 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 08:32:46,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:46,196 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:46,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:46,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1359716011, now seen corresponding path program 26 times [2023-08-24 08:32:46,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:46,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633236194] [2023-08-24 08:32:46,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:46,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:46,608 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 08:32:46,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:46,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633236194] [2023-08-24 08:32:46,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633236194] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:46,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444273084] [2023-08-24 08:32:46,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:46,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:46,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:46,610 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 08:32:46,611 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 08:32:46,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:46,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:46,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 69 conjunts are in the unsatisfiable core [2023-08-24 08:32:46,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:46,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:46,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:46,964 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 42 treesize of output 45 [2023-08-24 08:32:46,999 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 08:32:46,999 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 08:32:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444273084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:47,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:47,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-24 08:32:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71987892] [2023-08-24 08:32:47,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:47,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 08:32:47,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 08:32:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-08-24 08:32:47,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:32:47,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 313 transitions, 4008 flow. Second operand has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:47,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:47,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:32:47,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:47,810 INFO L124 PetriNetUnfolderBase]: 1046/1793 cut-off events. [2023-08-24 08:32:47,810 INFO L125 PetriNetUnfolderBase]: For 63302/63302 co-relation queries the response was YES. [2023-08-24 08:32:47,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16034 conditions, 1793 events. 1046/1793 cut-off events. For 63302/63302 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9430 event pairs, 179 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 15902. Up to 1634 conditions per place. [2023-08-24 08:32:47,825 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 316 selfloop transitions, 50 changer transitions 4/370 dead transitions. [2023-08-24 08:32:47,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 370 transitions, 5583 flow [2023-08-24 08:32:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 08:32:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 08:32:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1366 transitions. [2023-08-24 08:32:47,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30396083667111706 [2023-08-24 08:32:47,827 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1366 transitions. [2023-08-24 08:32:47,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1366 transitions. [2023-08-24 08:32:47,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:47,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1366 transitions. [2023-08-24 08:32:47,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.04761904761905) internal successors, (1366), 21 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:47,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:47,831 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 214.0) internal successors, (4708), 22 states have internal predecessors, (4708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:47,831 INFO L175 Difference]: Start difference. First operand has 265 places, 313 transitions, 4008 flow. Second operand 21 states and 1366 transitions. [2023-08-24 08:32:47,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 370 transitions, 5583 flow [2023-08-24 08:32:48,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 370 transitions, 5163 flow, removed 181 selfloop flow, removed 15 redundant places. [2023-08-24 08:32:48,010 INFO L231 Difference]: Finished difference. Result has 273 places, 324 transitions, 4172 flow [2023-08-24 08:32:48,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4172, PETRI_PLACES=273, PETRI_TRANSITIONS=324} [2023-08-24 08:32:48,010 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 252 predicate places. [2023-08-24 08:32:48,010 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 324 transitions, 4172 flow [2023-08-24 08:32:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.0) internal successors, (1550), 25 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:48,011 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:48,025 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 08:32:48,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:48,215 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:48,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1613279369, now seen corresponding path program 27 times [2023-08-24 08:32:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347914324] [2023-08-24 08:32:48,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:48,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:48,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347914324] [2023-08-24 08:32:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347914324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230922455] [2023-08-24 08:32:48,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:32:48,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:48,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:48,503 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 08:32:48,505 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 08:32:48,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:32:48,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:48,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 92 conjunts are in the unsatisfiable core [2023-08-24 08:32:48,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:48,741 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 08:32:48,778 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 08:32:48,799 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 08:32:48,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:48,952 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 15 treesize of output 14 [2023-08-24 08:32:48,997 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 08:32:48,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:49,401 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_999 (Array Int Int)) (v_subst_2 Int)) (or (< (+ v_subst_2 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_999) c_~A~0.base))) (< (select .cse0 (+ c_~A~0.offset (* 4 v_subst_2))) (+ c_~counter~0 (select .cse0 .cse1) 1))) (<= c_~N~0 v_subst_2))) (forall ((v_ArrVal_999 (Array Int Int)) (v_subst_1 Int)) (or (<= c_~N~0 v_subst_1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_999) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse2 .cse1)) (select .cse2 (+ c_~A~0.offset (* 4 v_subst_1))))) (< (+ v_subst_1 1) c_~N~0))))) is different from false [2023-08-24 08:32:49,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:49,506 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 55 treesize of output 44 [2023-08-24 08:32:49,512 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:49,512 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 94 treesize of output 88 [2023-08-24 08:32:49,519 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:49,519 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 80 treesize of output 68 [2023-08-24 08:32:49,527 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:49,527 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 34 treesize of output 33 [2023-08-24 08:32:49,574 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:49,575 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 56 treesize of output 45 [2023-08-24 08:32:49,582 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:32:49,582 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 98 treesize of output 88 [2023-08-24 08:32:49,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:32:49,588 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 46 treesize of output 35 [2023-08-24 08:32:49,595 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:32:49,595 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 72 treesize of output 56 [2023-08-24 08:32:49,669 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 08:32:49,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230922455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:49,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:49,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 30 [2023-08-24 08:32:49,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951953537] [2023-08-24 08:32:49,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:49,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:32:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:32:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=786, Unknown=1, NotChecked=58, Total=992 [2023-08-24 08:32:49,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:32:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 324 transitions, 4172 flow. Second operand has 32 states, 32 states have (on average 54.59375) internal successors, (1747), 32 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:32:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:50,809 INFO L124 PetriNetUnfolderBase]: 1183/2033 cut-off events. [2023-08-24 08:32:50,810 INFO L125 PetriNetUnfolderBase]: For 72763/72763 co-relation queries the response was YES. [2023-08-24 08:32:50,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18264 conditions, 2033 events. 1183/2033 cut-off events. For 72763/72763 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10990 event pairs, 199 based on Foata normal form. 2/2033 useless extension candidates. Maximal degree in co-relation 17989. Up to 1813 conditions per place. [2023-08-24 08:32:50,823 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 333 selfloop transitions, 94 changer transitions 5/432 dead transitions. [2023-08-24 08:32:50,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 432 transitions, 6663 flow [2023-08-24 08:32:50,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:32:50,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:32:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1440 transitions. [2023-08-24 08:32:50,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2691588785046729 [2023-08-24 08:32:50,825 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1440 transitions. [2023-08-24 08:32:50,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1440 transitions. [2023-08-24 08:32:50,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:50,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1440 transitions. [2023-08-24 08:32:50,827 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.6) internal successors, (1440), 25 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:50,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:50,829 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:50,829 INFO L175 Difference]: Start difference. First operand has 273 places, 324 transitions, 4172 flow. Second operand 25 states and 1440 transitions. [2023-08-24 08:32:50,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 432 transitions, 6663 flow [2023-08-24 08:32:50,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 432 transitions, 6136 flow, removed 210 selfloop flow, removed 13 redundant places. [2023-08-24 08:32:51,005 INFO L231 Difference]: Finished difference. Result has 292 places, 384 transitions, 5235 flow [2023-08-24 08:32:51,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3760, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5235, PETRI_PLACES=292, PETRI_TRANSITIONS=384} [2023-08-24 08:32:51,005 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 271 predicate places. [2023-08-24 08:32:51,005 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 384 transitions, 5235 flow [2023-08-24 08:32:51,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 54.59375) internal successors, (1747), 32 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:51,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:51,006 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:51,012 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 08:32:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:51,210 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:51,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:51,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1451669871, now seen corresponding path program 28 times [2023-08-24 08:32:51,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:51,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406304965] [2023-08-24 08:32:51,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:51,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:51,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406304965] [2023-08-24 08:32:51,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406304965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:51,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535006066] [2023-08-24 08:32:51,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:32:51,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:51,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:51,288 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 08:32:51,290 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 08:32:51,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:32:51,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:51,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:32:51,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:51,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:32:51,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535006066] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:51,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:51,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 08:32:51,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952044520] [2023-08-24 08:32:51,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:51,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:32:51,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:51,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:32:51,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:32:51,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:51,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 384 transitions, 5235 flow. Second operand has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:51,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:51,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:51,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:52,158 INFO L124 PetriNetUnfolderBase]: 1614/2894 cut-off events. [2023-08-24 08:32:52,159 INFO L125 PetriNetUnfolderBase]: For 110859/110883 co-relation queries the response was YES. [2023-08-24 08:32:52,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25087 conditions, 2894 events. 1614/2894 cut-off events. For 110859/110883 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17974 event pairs, 534 based on Foata normal form. 146/3020 useless extension candidates. Maximal degree in co-relation 24723. Up to 1806 conditions per place. [2023-08-24 08:32:52,184 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 452 selfloop transitions, 80 changer transitions 27/571 dead transitions. [2023-08-24 08:32:52,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 571 transitions, 8575 flow [2023-08-24 08:32:52,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:32:52,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:32:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 734 transitions. [2023-08-24 08:32:52,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3811007268951194 [2023-08-24 08:32:52,185 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 734 transitions. [2023-08-24 08:32:52,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 734 transitions. [2023-08-24 08:32:52,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:52,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 734 transitions. [2023-08-24 08:32:52,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.55555555555556) internal successors, (734), 9 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:52,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:52,187 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:52,187 INFO L175 Difference]: Start difference. First operand has 292 places, 384 transitions, 5235 flow. Second operand 9 states and 734 transitions. [2023-08-24 08:32:52,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 571 transitions, 8575 flow [2023-08-24 08:32:52,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 571 transitions, 8197 flow, removed 178 selfloop flow, removed 5 redundant places. [2023-08-24 08:32:52,429 INFO L231 Difference]: Finished difference. Result has 299 places, 430 transitions, 5855 flow [2023-08-24 08:32:52,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5855, PETRI_PLACES=299, PETRI_TRANSITIONS=430} [2023-08-24 08:32:52,429 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2023-08-24 08:32:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 430 transitions, 5855 flow [2023-08-24 08:32:52,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:52,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:52,430 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:52,434 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 08:32:52,634 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,SelfDestructingSolverStorable32 [2023-08-24 08:32:52,634 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:52,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:52,634 INFO L85 PathProgramCache]: Analyzing trace with hash 167617211, now seen corresponding path program 29 times [2023-08-24 08:32:52,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:52,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905649306] [2023-08-24 08:32:52,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:32:52,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:52,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905649306] [2023-08-24 08:32:52,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905649306] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:52,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072328397] [2023-08-24 08:32:52,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:32:52,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:52,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:52,712 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 08:32:52,712 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 08:32:52,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:32:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:52,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:32:52,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:32:52,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:52,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:32:52,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072328397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:52,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:52,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 08:32:52,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533216570] [2023-08-24 08:32:52,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:52,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:32:52,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:52,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:32:52,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:32:52,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:52,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 430 transitions, 5855 flow. Second operand has 19 states, 19 states have (on average 77.73684210526316) internal successors, (1477), 19 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:52,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:52,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:52,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:53,548 INFO L124 PetriNetUnfolderBase]: 1363/2560 cut-off events. [2023-08-24 08:32:53,548 INFO L125 PetriNetUnfolderBase]: For 94012/94038 co-relation queries the response was YES. [2023-08-24 08:32:53,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22289 conditions, 2560 events. 1363/2560 cut-off events. For 94012/94038 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 16259 event pairs, 515 based on Foata normal form. 150/2710 useless extension candidates. Maximal degree in co-relation 22134. Up to 1815 conditions per place. [2023-08-24 08:32:53,568 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 322 selfloop transitions, 4 changer transitions 158/489 dead transitions. [2023-08-24 08:32:53,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 489 transitions, 7290 flow [2023-08-24 08:32:53,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:32:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:32:53,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 733 transitions. [2023-08-24 08:32:53,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3805815160955348 [2023-08-24 08:32:53,570 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 733 transitions. [2023-08-24 08:32:53,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 733 transitions. [2023-08-24 08:32:53,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:53,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 733 transitions. [2023-08-24 08:32:53,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 81.44444444444444) internal successors, (733), 9 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:53,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:53,572 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:53,572 INFO L175 Difference]: Start difference. First operand has 299 places, 430 transitions, 5855 flow. Second operand 9 states and 733 transitions. [2023-08-24 08:32:53,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 489 transitions, 7290 flow [2023-08-24 08:32:53,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 489 transitions, 7207 flow, removed 37 selfloop flow, removed 5 redundant places. [2023-08-24 08:32:53,839 INFO L231 Difference]: Finished difference. Result has 305 places, 331 transitions, 4302 flow [2023-08-24 08:32:53,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4302, PETRI_PLACES=305, PETRI_TRANSITIONS=331} [2023-08-24 08:32:53,840 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 284 predicate places. [2023-08-24 08:32:53,840 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 331 transitions, 4302 flow [2023-08-24 08:32:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.73684210526316) internal successors, (1477), 19 states have internal predecessors, (1477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:53,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:53,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:53,844 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 08:32:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:54,044 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:54,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2012572228, now seen corresponding path program 30 times [2023-08-24 08:32:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940916925] [2023-08-24 08:32:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940916925] [2023-08-24 08:32:54,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940916925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:54,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863848443] [2023-08-24 08:32:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:32:54,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:54,131 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 08:32:54,133 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 08:32:54,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:32:54,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:54,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:32:54,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:54,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:54,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863848443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:54,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:54,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 08:32:54,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175198664] [2023-08-24 08:32:54,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:54,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:32:54,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:32:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:32:54,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:54,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 331 transitions, 4302 flow. Second operand has 19 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:54,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:54,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:54,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:54,866 INFO L124 PetriNetUnfolderBase]: 869/1511 cut-off events. [2023-08-24 08:32:54,866 INFO L125 PetriNetUnfolderBase]: For 71519/71521 co-relation queries the response was YES. [2023-08-24 08:32:54,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 1511 events. 869/1511 cut-off events. For 71519/71521 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7755 event pairs, 180 based on Foata normal form. 188/1699 useless extension candidates. Maximal degree in co-relation 12928. Up to 854 conditions per place. [2023-08-24 08:32:54,880 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 197 selfloop transitions, 111 changer transitions 0/313 dead transitions. [2023-08-24 08:32:54,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 313 transitions, 4901 flow [2023-08-24 08:32:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:32:54,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:32:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2023-08-24 08:32:54,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728971962616822 [2023-08-24 08:32:54,882 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2023-08-24 08:32:54,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2023-08-24 08:32:54,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:54,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2023-08-24 08:32:54,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:54,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:54,884 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:54,884 INFO L175 Difference]: Start difference. First operand has 305 places, 331 transitions, 4302 flow. Second operand 10 states and 798 transitions. [2023-08-24 08:32:54,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 313 transitions, 4901 flow [2023-08-24 08:32:55,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 313 transitions, 4247 flow, removed 278 selfloop flow, removed 34 redundant places. [2023-08-24 08:32:55,047 INFO L231 Difference]: Finished difference. Result has 261 places, 296 transitions, 3646 flow [2023-08-24 08:32:55,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3250, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3646, PETRI_PLACES=261, PETRI_TRANSITIONS=296} [2023-08-24 08:32:55,048 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 240 predicate places. [2023-08-24 08:32:55,048 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 296 transitions, 3646 flow [2023-08-24 08:32:55,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.89473684210526) internal successors, (1480), 19 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:55,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:55,048 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:55,052 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-24 08:32:55,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:55,253 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:55,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:55,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2084925748, now seen corresponding path program 31 times [2023-08-24 08:32:55,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:55,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775030089] [2023-08-24 08:32:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:55,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:55,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:55,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775030089] [2023-08-24 08:32:55,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775030089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:55,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006130103] [2023-08-24 08:32:55,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:32:55,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:55,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:55,335 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 08:32:55,337 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 08:32:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:55,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 08:32:55,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:55,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:55,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006130103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:55,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:55,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-24 08:32:55,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568510606] [2023-08-24 08:32:55,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:55,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:32:55,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:55,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:32:55,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:32:55,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 214 [2023-08-24 08:32:55,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 296 transitions, 3646 flow. Second operand has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:55,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:55,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 214 [2023-08-24 08:32:55,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:55,862 INFO L124 PetriNetUnfolderBase]: 682/1196 cut-off events. [2023-08-24 08:32:55,863 INFO L125 PetriNetUnfolderBase]: For 46788/46794 co-relation queries the response was YES. [2023-08-24 08:32:55,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10896 conditions, 1196 events. 682/1196 cut-off events. For 46788/46794 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5755 event pairs, 206 based on Foata normal form. 100/1290 useless extension candidates. Maximal degree in co-relation 10790. Up to 777 conditions per place. [2023-08-24 08:32:55,879 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 168 selfloop transitions, 95 changer transitions 0/272 dead transitions. [2023-08-24 08:32:55,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 272 transitions, 4259 flow [2023-08-24 08:32:55,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:32:55,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:32:55,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 798 transitions. [2023-08-24 08:32:55,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728971962616822 [2023-08-24 08:32:55,880 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 798 transitions. [2023-08-24 08:32:55,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 798 transitions. [2023-08-24 08:32:55,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:55,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 798 transitions. [2023-08-24 08:32:55,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 79.8) internal successors, (798), 10 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:55,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:55,882 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 214.0) internal successors, (2354), 11 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:55,882 INFO L175 Difference]: Start difference. First operand has 261 places, 296 transitions, 3646 flow. Second operand 10 states and 798 transitions. [2023-08-24 08:32:55,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 272 transitions, 4259 flow [2023-08-24 08:32:55,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 272 transitions, 3673 flow, removed 186 selfloop flow, removed 31 redundant places. [2023-08-24 08:32:55,968 INFO L231 Difference]: Finished difference. Result has 232 places, 259 transitions, 3158 flow [2023-08-24 08:32:55,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3158, PETRI_PLACES=232, PETRI_TRANSITIONS=259} [2023-08-24 08:32:55,969 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 211 predicate places. [2023-08-24 08:32:55,969 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 259 transitions, 3158 flow [2023-08-24 08:32:55,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 77.84210526315789) internal successors, (1479), 19 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:55,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:55,969 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:55,974 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 08:32:56,173 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,SelfDestructingSolverStorable35 [2023-08-24 08:32:56,174 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:56,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:56,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1161491682, now seen corresponding path program 32 times [2023-08-24 08:32:56,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:56,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695722295] [2023-08-24 08:32:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:56,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:32:57,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:32:57,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:32:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695722295] [2023-08-24 08:32:57,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695722295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:32:57,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072681334] [2023-08-24 08:32:57,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:32:57,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:32:57,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:32:57,086 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 08:32:57,094 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 08:32:57,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:32:57,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:32:57,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-08-24 08:32:57,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:32:57,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:32:57,398 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 25 treesize of output 23 [2023-08-24 08:32:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:32:57,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:32:57,666 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1182 (Array Int Int))) (<= c_~counter~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_1182 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~counter~0 1))))) is different from false [2023-08-24 08:32:57,673 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 8)) (.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1182 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2))) (+ .cse3 c_~counter~0 1))) (forall ((v_ArrVal_1182 (Array Int Int))) (<= (+ .cse3 c_~counter~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2))))))) is different from false [2023-08-24 08:32:57,680 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| c_~A~0.base)) (.cse7 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 8)) (.cse4 (+ c_~A~0.offset 4)) (.cse0 (select .cse6 (+ c_~A~0.offset .cse7))) (.cse1 (select .cse6 (+ c_~A~0.offset .cse7 4)))) (and (forall ((v_ArrVal_1182 (Array Int Int))) (<= (+ .cse0 c_~counter~0 .cse1) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse2 c_~A~0.offset) (select .cse2 .cse3) (select .cse2 .cse4))))) (forall ((v_ArrVal_1182 (Array Int Int))) (< (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1182) c_~A~0.base))) (+ (select .cse5 c_~A~0.offset) (select .cse5 .cse3) (select .cse5 .cse4))) (+ .cse0 c_~counter~0 .cse1 1)))))) is different from false [2023-08-24 08:32:57,713 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:57,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 120 [2023-08-24 08:32:57,719 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:32:57,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 15 [2023-08-24 08:32:57,897 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:32:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 5 not checked. [2023-08-24 08:32:58,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072681334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:32:58,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:32:58,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 08:32:58,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039646346] [2023-08-24 08:32:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:32:58,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 08:32:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:32:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 08:32:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1014, Unknown=3, NotChecked=198, Total=1332 [2023-08-24 08:32:58,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:32:58,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 259 transitions, 3158 flow. Second operand has 37 states, 37 states have (on average 54.5945945945946) internal successors, (2020), 37 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:58,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:32:58,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:32:58,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:32:59,391 INFO L124 PetriNetUnfolderBase]: 748/1308 cut-off events. [2023-08-24 08:32:59,391 INFO L125 PetriNetUnfolderBase]: For 26769/26769 co-relation queries the response was YES. [2023-08-24 08:32:59,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10475 conditions, 1308 events. 748/1308 cut-off events. For 26769/26769 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6305 event pairs, 123 based on Foata normal form. 1/1309 useless extension candidates. Maximal degree in co-relation 10386. Up to 1025 conditions per place. [2023-08-24 08:32:59,400 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 200 selfloop transitions, 112 changer transitions 1/313 dead transitions. [2023-08-24 08:32:59,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 313 transitions, 4494 flow [2023-08-24 08:32:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:32:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:32:59,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1435 transitions. [2023-08-24 08:32:59,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26822429906542056 [2023-08-24 08:32:59,402 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1435 transitions. [2023-08-24 08:32:59,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1435 transitions. [2023-08-24 08:32:59,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:32:59,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1435 transitions. [2023-08-24 08:32:59,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 57.4) internal successors, (1435), 25 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:59,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:59,406 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:59,406 INFO L175 Difference]: Start difference. First operand has 232 places, 259 transitions, 3158 flow. Second operand 25 states and 1435 transitions. [2023-08-24 08:32:59,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 313 transitions, 4494 flow [2023-08-24 08:32:59,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 313 transitions, 4245 flow, removed 49 selfloop flow, removed 14 redundant places. [2023-08-24 08:32:59,456 INFO L231 Difference]: Finished difference. Result has 248 places, 272 transitions, 3680 flow [2023-08-24 08:32:59,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=2980, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3680, PETRI_PLACES=248, PETRI_TRANSITIONS=272} [2023-08-24 08:32:59,457 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 227 predicate places. [2023-08-24 08:32:59,457 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 272 transitions, 3680 flow [2023-08-24 08:32:59,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.5945945945946) internal successors, (2020), 37 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:32:59,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:32:59,457 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:32:59,461 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 08:32:59,661 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,SelfDestructingSolverStorable36 [2023-08-24 08:32:59,662 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:32:59,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:32:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash -639377598, now seen corresponding path program 33 times [2023-08-24 08:32:59,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:32:59,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824158768] [2023-08-24 08:32:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:32:59,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:32:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:00,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824158768] [2023-08-24 08:33:00,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824158768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:00,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907433219] [2023-08-24 08:33:00,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:33:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:00,436 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 08:33:00,436 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 08:33:00,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:33:00,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:33:00,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-24 08:33:00,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:00,679 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 08:33:00,712 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 08:33:00,744 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 08:33:01,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:33:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:33:01,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:01,032 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 32 treesize of output 33 [2023-08-24 08:33:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:01,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:04,313 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4))) (and (forall ((v_ArrVal_1224 (Array Int Int)) (v_subst_6 Int)) (or (forall ((v_subst_4 Int)) (or (<= c_~N~0 (+ v_subst_4 1)) (< (+ 2 v_subst_4) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1224) c_~A~0.base))) (< (let ((.cse1 (* 4 v_subst_4))) (+ (select .cse0 (+ c_~A~0.offset .cse1 4)) (select .cse0 (+ c_~A~0.offset .cse1)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 (+ c_~A~0.offset (* 4 v_subst_6))) 1))))) (< (+ v_subst_6 1) c_~N~0) (<= c_~N~0 v_subst_6))) (forall ((v_ArrVal_1224 (Array Int Int)) (v_subst_5 Int)) (or (< (+ v_subst_5 1) c_~N~0) (forall ((v_subst_3 Int)) (or (<= c_~N~0 (+ v_subst_3 1)) (< (+ 2 v_subst_3) c_~N~0) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1224) c_~A~0.base))) (<= (+ (select .cse3 (+ c_~A~0.offset (* 4 v_subst_5))) c_~counter~0 (select .cse3 .cse2)) (let ((.cse4 (* 4 v_subst_3))) (+ (select .cse3 (+ c_~A~0.offset .cse4 4)) (select .cse3 (+ c_~A~0.offset .cse4)))))))) (<= c_~N~0 v_subst_5))))) is different from false [2023-08-24 08:33:10,484 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 08:33:10,508 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:10,508 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 112 treesize of output 77 [2023-08-24 08:33:10,532 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 08:33:10,532 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 166 treesize of output 155 [2023-08-24 08:33:10,557 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 08:33:10,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 132 treesize of output 106 [2023-08-24 08:33:10,583 INFO L322 Elim1Store]: treesize reduction 22, result has 48.8 percent of original size [2023-08-24 08:33:10,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 50 [2023-08-24 08:33:10,650 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:10,650 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 111 treesize of output 76 [2023-08-24 08:33:10,669 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 08:33:10,669 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 334 treesize of output 280 [2023-08-24 08:33:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:33:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:33:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:33:10,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:33:10,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 21 [2023-08-24 08:33:10,695 INFO L322 Elim1Store]: treesize reduction 34, result has 20.9 percent of original size [2023-08-24 08:33:10,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 76 treesize of output 39 [2023-08-24 08:33:10,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:10,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907433219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:10,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:10,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2023-08-24 08:33:10,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312247498] [2023-08-24 08:33:10,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:10,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-24 08:33:10,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-24 08:33:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1892, Unknown=1, NotChecked=88, Total=2162 [2023-08-24 08:33:10,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:33:10,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 272 transitions, 3680 flow. Second operand has 47 states, 47 states have (on average 54.340425531914896) internal successors, (2554), 47 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:10,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:10,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:33:10,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:15,024 INFO L124 PetriNetUnfolderBase]: 949/1666 cut-off events. [2023-08-24 08:33:15,025 INFO L125 PetriNetUnfolderBase]: For 29658/29658 co-relation queries the response was YES. [2023-08-24 08:33:15,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13596 conditions, 1666 events. 949/1666 cut-off events. For 29658/29658 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8551 event pairs, 141 based on Foata normal form. 2/1668 useless extension candidates. Maximal degree in co-relation 13507. Up to 1257 conditions per place. [2023-08-24 08:33:15,036 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 266 selfloop transitions, 191 changer transitions 7/464 dead transitions. [2023-08-24 08:33:15,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 464 transitions, 7047 flow [2023-08-24 08:33:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-24 08:33:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-24 08:33:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3073 transitions. [2023-08-24 08:33:15,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26592246452059537 [2023-08-24 08:33:15,039 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3073 transitions. [2023-08-24 08:33:15,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3073 transitions. [2023-08-24 08:33:15,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:15,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3073 transitions. [2023-08-24 08:33:15,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 56.907407407407405) internal successors, (3073), 54 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:15,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 214.0) internal successors, (11770), 55 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:15,047 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 214.0) internal successors, (11770), 55 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:15,047 INFO L175 Difference]: Start difference. First operand has 248 places, 272 transitions, 3680 flow. Second operand 54 states and 3073 transitions. [2023-08-24 08:33:15,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 464 transitions, 7047 flow [2023-08-24 08:33:15,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 464 transitions, 6387 flow, removed 216 selfloop flow, removed 16 redundant places. [2023-08-24 08:33:15,111 INFO L231 Difference]: Finished difference. Result has 298 places, 381 transitions, 5725 flow [2023-08-24 08:33:15,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=3264, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5725, PETRI_PLACES=298, PETRI_TRANSITIONS=381} [2023-08-24 08:33:15,112 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 277 predicate places. [2023-08-24 08:33:15,112 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 381 transitions, 5725 flow [2023-08-24 08:33:15,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 54.340425531914896) internal successors, (2554), 47 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:15,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:15,112 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:15,119 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 08:33:15,317 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,SelfDestructingSolverStorable37 [2023-08-24 08:33:15,317 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:15,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:15,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2072187220, now seen corresponding path program 34 times [2023-08-24 08:33:15,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:15,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200732001] [2023-08-24 08:33:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:15,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:16,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:16,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200732001] [2023-08-24 08:33:16,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200732001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:16,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614532918] [2023-08-24 08:33:16,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:33:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:16,086 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 08:33:16,088 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 08:33:16,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:33:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:33:16,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:33:16,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:16,489 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:16,489 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 15 treesize of output 14 [2023-08-24 08:33:16,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:16,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:17,076 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:17,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 109 [2023-08-24 08:33:17,462 INFO L322 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-24 08:33:17,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 66 [2023-08-24 08:33:17,773 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:17,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614532918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:17,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:17,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 08:33:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448642296] [2023-08-24 08:33:17,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:17,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:33:17,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:17,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:33:17,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1608, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 08:33:17,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:33:17,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 381 transitions, 5725 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:17,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:17,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:33:17,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:19,803 INFO L124 PetriNetUnfolderBase]: 1028/1800 cut-off events. [2023-08-24 08:33:19,803 INFO L125 PetriNetUnfolderBase]: For 40651/40651 co-relation queries the response was YES. [2023-08-24 08:33:19,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 1800 events. 1028/1800 cut-off events. For 40651/40651 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9429 event pairs, 166 based on Foata normal form. 2/1802 useless extension candidates. Maximal degree in co-relation 15671. Up to 1318 conditions per place. [2023-08-24 08:33:19,818 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 276 selfloop transitions, 196 changer transitions 7/479 dead transitions. [2023-08-24 08:33:19,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 479 transitions, 8059 flow [2023-08-24 08:33:19,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 08:33:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 08:33:19,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2570 transitions. [2023-08-24 08:33:19,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26687435098650053 [2023-08-24 08:33:19,820 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2570 transitions. [2023-08-24 08:33:19,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2570 transitions. [2023-08-24 08:33:19,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:19,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2570 transitions. [2023-08-24 08:33:19,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.111111111111114) internal successors, (2570), 45 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:19,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:19,827 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:19,827 INFO L175 Difference]: Start difference. First operand has 298 places, 381 transitions, 5725 flow. Second operand 45 states and 2570 transitions. [2023-08-24 08:33:19,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 479 transitions, 8059 flow [2023-08-24 08:33:19,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 479 transitions, 7400 flow, removed 276 selfloop flow, removed 16 redundant places. [2023-08-24 08:33:19,939 INFO L231 Difference]: Finished difference. Result has 330 places, 412 transitions, 6686 flow [2023-08-24 08:33:19,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=5070, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=6686, PETRI_PLACES=330, PETRI_TRANSITIONS=412} [2023-08-24 08:33:19,939 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 309 predicate places. [2023-08-24 08:33:19,939 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 412 transitions, 6686 flow [2023-08-24 08:33:19,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:19,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:19,940 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:19,945 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 08:33:20,144 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,SelfDestructingSolverStorable38 [2023-08-24 08:33:20,144 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:20,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash -756029916, now seen corresponding path program 35 times [2023-08-24 08:33:20,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:20,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515288655] [2023-08-24 08:33:20,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:20,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:20,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:20,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515288655] [2023-08-24 08:33:20,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515288655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:20,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480619753] [2023-08-24 08:33:20,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:33:20,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:20,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:20,905 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 08:33:20,907 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 08:33:21,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:33:21,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:33:21,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 08:33:21,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:33:21,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:21,480 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:21,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:33:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:33:21,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480619753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:21,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:21,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 08:33:21,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235497608] [2023-08-24 08:33:21,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:21,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:33:21,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:21,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:33:21,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 08:33:21,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:33:21,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 412 transitions, 6686 flow. Second operand has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:21,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:21,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:33:21,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:23,096 INFO L124 PetriNetUnfolderBase]: 1093/1904 cut-off events. [2023-08-24 08:33:23,096 INFO L125 PetriNetUnfolderBase]: For 46262/46262 co-relation queries the response was YES. [2023-08-24 08:33:23,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17565 conditions, 1904 events. 1093/1904 cut-off events. For 46262/46262 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10033 event pairs, 145 based on Foata normal form. 2/1906 useless extension candidates. Maximal degree in co-relation 17459. Up to 1451 conditions per place. [2023-08-24 08:33:23,111 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 277 selfloop transitions, 208 changer transitions 2/487 dead transitions. [2023-08-24 08:33:23,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 487 transitions, 8877 flow [2023-08-24 08:33:23,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 08:33:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 08:33:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1888 transitions. [2023-08-24 08:33:23,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26734636080430474 [2023-08-24 08:33:23,113 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1888 transitions. [2023-08-24 08:33:23,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1888 transitions. [2023-08-24 08:33:23,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:23,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1888 transitions. [2023-08-24 08:33:23,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.21212121212121) internal successors, (1888), 33 states have internal predecessors, (1888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:23,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 214.0) internal successors, (7276), 34 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:23,118 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 214.0) internal successors, (7276), 34 states have internal predecessors, (7276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:23,118 INFO L175 Difference]: Start difference. First operand has 330 places, 412 transitions, 6686 flow. Second operand 33 states and 1888 transitions. [2023-08-24 08:33:23,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 487 transitions, 8877 flow [2023-08-24 08:33:23,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 487 transitions, 7846 flow, removed 420 selfloop flow, removed 31 redundant places. [2023-08-24 08:33:23,264 INFO L231 Difference]: Finished difference. Result has 338 places, 438 transitions, 7196 flow [2023-08-24 08:33:23,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7196, PETRI_PLACES=338, PETRI_TRANSITIONS=438} [2023-08-24 08:33:23,264 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 317 predicate places. [2023-08-24 08:33:23,265 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 438 transitions, 7196 flow [2023-08-24 08:33:23,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.74285714285714) internal successors, (1916), 35 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:23,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:23,265 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:23,271 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 08:33:23,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 08:33:23,469 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:23,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:23,469 INFO L85 PathProgramCache]: Analyzing trace with hash -441116318, now seen corresponding path program 36 times [2023-08-24 08:33:23,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:23,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285300289] [2023-08-24 08:33:23,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:23,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:24,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:24,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285300289] [2023-08-24 08:33:24,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285300289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:24,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118149595] [2023-08-24 08:33:24,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:33:24,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:24,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:24,051 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 08:33:24,053 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 08:33:24,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:33:24,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:33:24,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 08:33:24,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:24,268 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 08:33:24,301 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 08:33:24,327 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 08:33:24,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:24,557 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 15 treesize of output 14 [2023-08-24 08:33:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:24,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:25,239 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1342 (Array Int Int)) (v_subst_10 Int)) (or (< (+ v_subst_10 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1342) c_~A~0.base))) (< (select .cse0 .cse1) (+ (select .cse0 (+ c_~A~0.offset (* v_subst_10 4))) c_~counter~0 1))) (<= c_~N~0 v_subst_10))) (forall ((v_subst_9 Int) (v_ArrVal_1342 (Array Int Int))) (or (< (+ v_subst_9 1) c_~N~0) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1342) c_~A~0.base))) (<= (+ (select .cse2 (+ c_~A~0.offset (* 4 v_subst_9))) c_~counter~0) (select .cse2 .cse1))) (<= c_~N~0 v_subst_9))))) is different from false [2023-08-24 08:33:25,340 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:25,340 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 56 treesize of output 45 [2023-08-24 08:33:25,347 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:25,347 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 206 treesize of output 186 [2023-08-24 08:33:25,356 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:25,356 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 37 treesize of output 36 [2023-08-24 08:33:25,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:25,363 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 46 treesize of output 35 [2023-08-24 08:33:25,420 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:25,420 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 55 treesize of output 44 [2023-08-24 08:33:25,427 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:33:25,428 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 198 treesize of output 174 [2023-08-24 08:33:25,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:33:25,434 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 44 treesize of output 20 [2023-08-24 08:33:25,441 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:33:25,441 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 33 treesize of output 28 [2023-08-24 08:33:25,571 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:25,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118149595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:25,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:25,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 41 [2023-08-24 08:33:25,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594753575] [2023-08-24 08:33:25,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:25,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:33:25,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:33:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1544, Unknown=1, NotChecked=80, Total=1806 [2023-08-24 08:33:25,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:33:25,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 438 transitions, 7196 flow. Second operand has 43 states, 43 states have (on average 54.348837209302324) internal successors, (2337), 43 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:25,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:25,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:33:25,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:28,300 INFO L124 PetriNetUnfolderBase]: 1320/2299 cut-off events. [2023-08-24 08:33:28,300 INFO L125 PetriNetUnfolderBase]: For 56704/56704 co-relation queries the response was YES. [2023-08-24 08:33:28,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 2299 events. 1320/2299 cut-off events. For 56704/56704 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12685 event pairs, 170 based on Foata normal form. 2/2299 useless extension candidates. Maximal degree in co-relation 21052. Up to 1710 conditions per place. [2023-08-24 08:33:28,320 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 323 selfloop transitions, 278 changer transitions 4/605 dead transitions. [2023-08-24 08:33:28,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 605 transitions, 11051 flow [2023-08-24 08:33:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 08:33:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 08:33:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2515 transitions. [2023-08-24 08:33:28,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2670985556499575 [2023-08-24 08:33:28,322 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2515 transitions. [2023-08-24 08:33:28,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2515 transitions. [2023-08-24 08:33:28,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:28,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2515 transitions. [2023-08-24 08:33:28,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.15909090909091) internal successors, (2515), 44 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:28,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:28,328 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:28,328 INFO L175 Difference]: Start difference. First operand has 338 places, 438 transitions, 7196 flow. Second operand 44 states and 2515 transitions. [2023-08-24 08:33:28,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 605 transitions, 11051 flow [2023-08-24 08:33:28,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 605 transitions, 10257 flow, removed 308 selfloop flow, removed 19 redundant places. [2023-08-24 08:33:28,505 INFO L231 Difference]: Finished difference. Result has 367 places, 535 transitions, 9227 flow [2023-08-24 08:33:28,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=9227, PETRI_PLACES=367, PETRI_TRANSITIONS=535} [2023-08-24 08:33:28,505 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 346 predicate places. [2023-08-24 08:33:28,505 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 535 transitions, 9227 flow [2023-08-24 08:33:28,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.348837209302324) internal successors, (2337), 43 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:28,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:28,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:28,512 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 08:33:28,711 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,SelfDestructingSolverStorable40 [2023-08-24 08:33:28,711 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:28,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash 437994252, now seen corresponding path program 37 times [2023-08-24 08:33:28,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:28,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784457435] [2023-08-24 08:33:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:29,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:29,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784457435] [2023-08-24 08:33:29,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784457435] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:29,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734729943] [2023-08-24 08:33:29,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:33:29,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:29,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:29,389 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 08:33:29,433 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 08:33:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:29,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:33:29,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:33:29,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:29,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:29,977 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:33:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:33:30,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734729943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:30,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:30,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-08-24 08:33:30,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092040699] [2023-08-24 08:33:30,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:33:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:33:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2023-08-24 08:33:30,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:33:30,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 535 transitions, 9227 flow. Second operand has 32 states, 32 states have (on average 61.6875) internal successors, (1974), 32 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:30,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:30,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:33:30,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:31,692 INFO L124 PetriNetUnfolderBase]: 1428/2485 cut-off events. [2023-08-24 08:33:31,692 INFO L125 PetriNetUnfolderBase]: For 62833/62833 co-relation queries the response was YES. [2023-08-24 08:33:31,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23721 conditions, 2485 events. 1428/2485 cut-off events. For 62833/62833 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13969 event pairs, 191 based on Foata normal form. 2/2485 useless extension candidates. Maximal degree in co-relation 23605. Up to 1968 conditions per place. [2023-08-24 08:33:31,717 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 382 selfloop transitions, 233 changer transitions 2/617 dead transitions. [2023-08-24 08:33:31,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 617 transitions, 12199 flow [2023-08-24 08:33:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 08:33:31,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 08:33:31,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1929 transitions. [2023-08-24 08:33:31,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30046728971962616 [2023-08-24 08:33:31,720 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1929 transitions. [2023-08-24 08:33:31,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1929 transitions. [2023-08-24 08:33:31,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:31,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1929 transitions. [2023-08-24 08:33:31,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.3) internal successors, (1929), 30 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 08:33:31,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:31,725 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:31,725 INFO L175 Difference]: Start difference. First operand has 367 places, 535 transitions, 9227 flow. Second operand 30 states and 1929 transitions. [2023-08-24 08:33:31,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 617 transitions, 12199 flow [2023-08-24 08:33:31,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 617 transitions, 11418 flow, removed 311 selfloop flow, removed 26 redundant places. [2023-08-24 08:33:31,952 INFO L231 Difference]: Finished difference. Result has 378 places, 573 transitions, 10574 flow [2023-08-24 08:33:31,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=8532, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10574, PETRI_PLACES=378, PETRI_TRANSITIONS=573} [2023-08-24 08:33:31,953 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 357 predicate places. [2023-08-24 08:33:31,953 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 573 transitions, 10574 flow [2023-08-24 08:33:31,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.6875) internal successors, (1974), 32 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:31,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:31,953 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:31,960 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 08:33:32,160 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,SelfDestructingSolverStorable41 [2023-08-24 08:33:32,161 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:32,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash 123080654, now seen corresponding path program 38 times [2023-08-24 08:33:32,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:32,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509647235] [2023-08-24 08:33:32,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:32,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:32,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509647235] [2023-08-24 08:33:32,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509647235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:32,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337039664] [2023-08-24 08:33:32,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:33:32,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:33,009 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 08:33:33,012 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 08:33:33,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:33:33,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:33:33,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 08:33:33,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:33,237 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 08:33:33,277 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 08:33:33,312 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 08:33:33,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:33,559 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 15 treesize of output 14 [2023-08-24 08:33:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:33,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:34,291 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1422 (Array Int Int)) (v_subst_11 Int)) (or (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1422) c_~A~0.base))) (< (select .cse0 (+ c_~A~0.offset (* v_subst_11 4))) (+ c_~counter~0 (select .cse0 .cse1) 1))) (<= c_~N~0 v_subst_11) (< (+ v_subst_11 1) c_~N~0))) (forall ((v_subst_12 Int) (v_ArrVal_1422 (Array Int Int))) (or (<= c_~N~0 v_subst_12) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1422) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse2 .cse1)) (select .cse2 (+ c_~A~0.offset (* v_subst_12 4))))) (< (+ v_subst_12 1) c_~N~0))))) is different from false [2023-08-24 08:33:34,387 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:34,387 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 56 treesize of output 45 [2023-08-24 08:33:34,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:34,398 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 98 treesize of output 92 [2023-08-24 08:33:34,406 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:34,407 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 84 treesize of output 72 [2023-08-24 08:33:34,416 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:34,416 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 36 treesize of output 35 [2023-08-24 08:33:34,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:34,473 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 55 treesize of output 44 [2023-08-24 08:33:34,480 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:33:34,480 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 94 treesize of output 84 [2023-08-24 08:33:34,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:33:34,487 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 44 treesize of output 32 [2023-08-24 08:33:34,493 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:33:34,493 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 66 treesize of output 50 [2023-08-24 08:33:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:34,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337039664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:34,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:34,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 08:33:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324347444] [2023-08-24 08:33:34,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:34,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 08:33:34,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:34,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 08:33:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1687, Unknown=1, NotChecked=84, Total=1980 [2023-08-24 08:33:34,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:33:34,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 573 transitions, 10574 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:34,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:34,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:33:34,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:49,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:33:54,103 INFO L124 PetriNetUnfolderBase]: 1492/2595 cut-off events. [2023-08-24 08:33:54,103 INFO L125 PetriNetUnfolderBase]: For 70982/70982 co-relation queries the response was YES. [2023-08-24 08:33:54,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25775 conditions, 2595 events. 1492/2595 cut-off events. For 70982/70982 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14683 event pairs, 238 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 25652. Up to 2211 conditions per place. [2023-08-24 08:33:54,129 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 445 selfloop transitions, 220 changer transitions 6/671 dead transitions. [2023-08-24 08:33:54,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 671 transitions, 13532 flow [2023-08-24 08:33:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 08:33:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 08:33:54,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2560 transitions. [2023-08-24 08:33:54,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26583592938733125 [2023-08-24 08:33:54,131 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2560 transitions. [2023-08-24 08:33:54,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2560 transitions. [2023-08-24 08:33:54,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:54,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2560 transitions. [2023-08-24 08:33:54,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 56.888888888888886) internal successors, (2560), 45 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:54,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:54,138 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:54,138 INFO L175 Difference]: Start difference. First operand has 378 places, 573 transitions, 10574 flow. Second operand 45 states and 2560 transitions. [2023-08-24 08:33:54,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 671 transitions, 13532 flow [2023-08-24 08:33:54,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 671 transitions, 12497 flow, removed 439 selfloop flow, removed 19 redundant places. [2023-08-24 08:33:54,463 INFO L231 Difference]: Finished difference. Result has 408 places, 610 transitions, 11495 flow [2023-08-24 08:33:54,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=9715, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=11495, PETRI_PLACES=408, PETRI_TRANSITIONS=610} [2023-08-24 08:33:54,463 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 387 predicate places. [2023-08-24 08:33:54,464 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 610 transitions, 11495 flow [2023-08-24 08:33:54,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:54,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:54,464 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:54,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 08:33:54,669 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,SelfDestructingSolverStorable42 [2023-08-24 08:33:54,669 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:54,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1503022048, now seen corresponding path program 39 times [2023-08-24 08:33:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:54,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518428656] [2023-08-24 08:33:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:33:55,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:55,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518428656] [2023-08-24 08:33:55,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518428656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:55,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968509707] [2023-08-24 08:33:55,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:33:55,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:55,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:55,500 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 08:33:55,501 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 08:33:55,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:33:55,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:33:55,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 106 conjunts are in the unsatisfiable core [2023-08-24 08:33:55,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:55,968 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:33:55,968 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 14 [2023-08-24 08:33:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:33:56,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:56,779 INFO L322 Elim1Store]: treesize reduction 38, result has 65.8 percent of original size [2023-08-24 08:33:56,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 84 [2023-08-24 08:33:56,837 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:33:56,837 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 10 [2023-08-24 08:33:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:33:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968509707] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:56,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:56,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-08-24 08:33:56,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629941023] [2023-08-24 08:33:56,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:56,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 08:33:56,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:56,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 08:33:56,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1326, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 08:33:56,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:33:56,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 610 transitions, 11495 flow. Second operand has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:56,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:56,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:33:56,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:59,399 INFO L124 PetriNetUnfolderBase]: 1544/2696 cut-off events. [2023-08-24 08:33:59,399 INFO L125 PetriNetUnfolderBase]: For 78448/78448 co-relation queries the response was YES. [2023-08-24 08:33:59,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27218 conditions, 2696 events. 1544/2696 cut-off events. For 78448/78448 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15538 event pairs, 328 based on Foata normal form. 2/2696 useless extension candidates. Maximal degree in co-relation 27089. Up to 2274 conditions per place. [2023-08-24 08:33:59,426 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 496 selfloop transitions, 180 changer transitions 9/685 dead transitions. [2023-08-24 08:33:59,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 685 transitions, 14106 flow [2023-08-24 08:33:59,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 08:33:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 08:33:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1828 transitions. [2023-08-24 08:33:59,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2669392523364486 [2023-08-24 08:33:59,428 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1828 transitions. [2023-08-24 08:33:59,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1828 transitions. [2023-08-24 08:33:59,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:59,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1828 transitions. [2023-08-24 08:33:59,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.125) internal successors, (1828), 32 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:59,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:59,445 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:59,445 INFO L175 Difference]: Start difference. First operand has 408 places, 610 transitions, 11495 flow. Second operand 32 states and 1828 transitions. [2023-08-24 08:33:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 685 transitions, 14106 flow [2023-08-24 08:33:59,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 685 transitions, 13433 flow, removed 258 selfloop flow, removed 29 redundant places. [2023-08-24 08:33:59,787 INFO L231 Difference]: Finished difference. Result has 416 places, 630 transitions, 12194 flow [2023-08-24 08:33:59,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=10824, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12194, PETRI_PLACES=416, PETRI_TRANSITIONS=630} [2023-08-24 08:33:59,788 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 395 predicate places. [2023-08-24 08:33:59,788 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 630 transitions, 12194 flow [2023-08-24 08:33:59,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.61538461538461) internal successors, (2130), 39 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:33:59,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:59,788 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:33:59,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-24 08:33:59,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:59,993 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:33:59,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:59,994 INFO L85 PathProgramCache]: Analyzing trace with hash -315800322, now seen corresponding path program 40 times [2023-08-24 08:33:59,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:59,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673291678] [2023-08-24 08:33:59,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:59,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:00,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673291678] [2023-08-24 08:34:00,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673291678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:00,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141154102] [2023-08-24 08:34:00,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:34:00,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:00,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:00,761 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 08:34:00,763 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 08:34:00,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:34:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:00,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-24 08:34:00,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:01,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:01,140 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 08:34:01,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:01,305 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 15 treesize of output 14 [2023-08-24 08:34:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:01,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:01,782 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_1499 (Array Int Int)) (|thread1Thread1of1ForFork0_~i~0#1| Int)) (or (<= c_~N~0 |thread1Thread1of1ForFork0_~i~0#1|) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (<= (+ (select .cse0 (+ c_~A~0.offset (* |thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)))))) (forall ((v_ArrVal_1499 (Array Int Int)) (|thread1Thread1of1ForFork0_~i~0#1| Int)) (or (<= c_~N~0 |thread1Thread1of1ForFork0_~i~0#1|) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (< (+ (select .cse3 c_~A~0.offset) (select .cse3 .cse1) (select .cse3 .cse2)) (+ (select .cse3 (+ c_~A~0.offset (* |thread1Thread1of1ForFork0_~i~0#1| 4))) c_~counter~0 1))) (< (+ |thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0))))) is different from false [2023-08-24 08:34:01,800 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_subst_18 Int) (v_ArrVal_1499 (Array Int Int))) (or (< (+ v_subst_18 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (< (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse1) (select .cse0 .cse2)) (+ .cse3 c_~counter~0 (select .cse0 (+ c_~A~0.offset (* v_subst_18 4))) 1))) (<= c_~N~0 v_subst_18))) (forall ((v_ArrVal_1499 (Array Int Int)) (v_subst_17 Int)) (or (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1499) c_~A~0.base))) (<= (+ .cse3 c_~counter~0 (select .cse4 (+ c_~A~0.offset (* v_subst_17 4)))) (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse1) (select .cse4 .cse2)))) (<= c_~N~0 v_subst_17) (< (+ v_subst_17 1) c_~N~0))))) is different from false [2023-08-24 08:34:01,863 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:01,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 140 [2023-08-24 08:34:01,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:01,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 40 [2023-08-24 08:34:02,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:34:02,221 INFO L322 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-24 08:34:02,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-24 08:34:02,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-24 08:34:02,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141154102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:02,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:02,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 08:34:02,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875312656] [2023-08-24 08:34:02,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:02,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 08:34:02,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:02,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 08:34:02,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1659, Unknown=2, NotChecked=166, Total=1980 [2023-08-24 08:34:02,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:34:02,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 630 transitions, 12194 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:02,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:02,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:34:02,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:05,859 INFO L124 PetriNetUnfolderBase]: 1734/3006 cut-off events. [2023-08-24 08:34:05,859 INFO L125 PetriNetUnfolderBase]: For 101802/101802 co-relation queries the response was YES. [2023-08-24 08:34:05,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31095 conditions, 3006 events. 1734/3006 cut-off events. For 101802/101802 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17608 event pairs, 220 based on Foata normal form. 1/3005 useless extension candidates. Maximal degree in co-relation 30960. Up to 2389 conditions per place. [2023-08-24 08:34:05,892 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 475 selfloop transitions, 301 changer transitions 4/780 dead transitions. [2023-08-24 08:34:05,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 780 transitions, 16180 flow [2023-08-24 08:34:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 08:34:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 08:34:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2502 transitions. [2023-08-24 08:34:05,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2657179269328802 [2023-08-24 08:34:05,895 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2502 transitions. [2023-08-24 08:34:05,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2502 transitions. [2023-08-24 08:34:05,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:05,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2502 transitions. [2023-08-24 08:34:05,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 56.86363636363637) internal successors, (2502), 44 states have internal predecessors, (2502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:05,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:05,901 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:05,901 INFO L175 Difference]: Start difference. First operand has 416 places, 630 transitions, 12194 flow. Second operand 44 states and 2502 transitions. [2023-08-24 08:34:05,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 780 transitions, 16180 flow [2023-08-24 08:34:06,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 780 transitions, 15329 flow, removed 329 selfloop flow, removed 21 redundant places. [2023-08-24 08:34:06,327 INFO L231 Difference]: Finished difference. Result has 443 places, 719 transitions, 14316 flow [2023-08-24 08:34:06,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=11347, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=14316, PETRI_PLACES=443, PETRI_TRANSITIONS=719} [2023-08-24 08:34:06,328 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 422 predicate places. [2023-08-24 08:34:06,328 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 719 transitions, 14316 flow [2023-08-24 08:34:06,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:06,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:06,329 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:06,336 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 08:34:06,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:06,534 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:06,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:06,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1754151556, now seen corresponding path program 41 times [2023-08-24 08:34:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:06,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689304051] [2023-08-24 08:34:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:07,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:07,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689304051] [2023-08-24 08:34:07,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689304051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:07,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737195135] [2023-08-24 08:34:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:34:07,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:07,041 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 08:34:07,041 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 08:34:07,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:34:07,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:07,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 08:34:07,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:34:07,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:07,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:07,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:34:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737195135] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:07,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:07,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 22 [2023-08-24 08:34:07,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197832393] [2023-08-24 08:34:07,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:07,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:34:07,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:07,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:34:07,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:34:07,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 214 [2023-08-24 08:34:07,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 719 transitions, 14316 flow. Second operand has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:07,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:07,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 214 [2023-08-24 08:34:07,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:09,032 INFO L124 PetriNetUnfolderBase]: 1818/3136 cut-off events. [2023-08-24 08:34:09,033 INFO L125 PetriNetUnfolderBase]: For 119190/119190 co-relation queries the response was YES. [2023-08-24 08:34:09,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34101 conditions, 3136 events. 1818/3136 cut-off events. For 119190/119190 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18385 event pairs, 280 based on Foata normal form. 2/3136 useless extension candidates. Maximal degree in co-relation 33961. Up to 2793 conditions per place. [2023-08-24 08:34:09,065 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 614 selfloop transitions, 180 changer transitions 5/799 dead transitions. [2023-08-24 08:34:09,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 799 transitions, 18121 flow [2023-08-24 08:34:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 08:34:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 08:34:09,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1789 transitions. [2023-08-24 08:34:09,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.334392523364486 [2023-08-24 08:34:09,067 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1789 transitions. [2023-08-24 08:34:09,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1789 transitions. [2023-08-24 08:34:09,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:09,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1789 transitions. [2023-08-24 08:34:09,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 71.56) internal successors, (1789), 25 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:09,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:09,072 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 214.0) internal successors, (5564), 26 states have internal predecessors, (5564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:09,072 INFO L175 Difference]: Start difference. First operand has 443 places, 719 transitions, 14316 flow. Second operand 25 states and 1789 transitions. [2023-08-24 08:34:09,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 799 transitions, 18121 flow [2023-08-24 08:34:09,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 799 transitions, 17243 flow, removed 368 selfloop flow, removed 23 redundant places. [2023-08-24 08:34:09,539 INFO L231 Difference]: Finished difference. Result has 452 places, 764 transitions, 15907 flow [2023-08-24 08:34:09,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=13456, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=15907, PETRI_PLACES=452, PETRI_TRANSITIONS=764} [2023-08-24 08:34:09,539 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-08-24 08:34:09,539 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 764 transitions, 15907 flow [2023-08-24 08:34:09,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:09,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:09,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:09,559 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 08:34:09,745 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,SelfDestructingSolverStorable45 [2023-08-24 08:34:09,745 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:09,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1530563286, now seen corresponding path program 42 times [2023-08-24 08:34:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524339127] [2023-08-24 08:34:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524339127] [2023-08-24 08:34:10,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524339127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316551059] [2023-08-24 08:34:10,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:34:10,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:10,541 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 08:34:10,545 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 08:34:10,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:34:10,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:10,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:34:10,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:11,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:11,027 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:11,027 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 30 treesize of output 33 [2023-08-24 08:34:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:11,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:11,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:11,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 08:34:12,125 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:34:12,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 08:34:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:12,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316551059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:12,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:12,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 08:34:12,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221091830] [2023-08-24 08:34:12,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:12,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 08:34:12,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:12,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 08:34:12,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1521, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 08:34:12,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:34:12,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 764 transitions, 15907 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:12,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:12,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:34:12,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:14,733 INFO L124 PetriNetUnfolderBase]: 1924/3332 cut-off events. [2023-08-24 08:34:14,734 INFO L125 PetriNetUnfolderBase]: For 143076/143076 co-relation queries the response was YES. [2023-08-24 08:34:14,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37360 conditions, 3332 events. 1924/3332 cut-off events. For 143076/143076 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19936 event pairs, 266 based on Foata normal form. 2/3332 useless extension candidates. Maximal degree in co-relation 37212. Up to 2789 conditions per place. [2023-08-24 08:34:14,771 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 653 selfloop transitions, 212 changer transitions 4/869 dead transitions. [2023-08-24 08:34:14,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 869 transitions, 19862 flow [2023-08-24 08:34:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 08:34:14,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 08:34:14,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1725 transitions. [2023-08-24 08:34:14,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26869158878504673 [2023-08-24 08:34:14,773 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1725 transitions. [2023-08-24 08:34:14,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1725 transitions. [2023-08-24 08:34:14,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:14,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1725 transitions. [2023-08-24 08:34:14,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 57.5) internal successors, (1725), 30 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:14,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:14,778 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:14,778 INFO L175 Difference]: Start difference. First operand has 452 places, 764 transitions, 15907 flow. Second operand 30 states and 1725 transitions. [2023-08-24 08:34:14,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 869 transitions, 19862 flow [2023-08-24 08:34:15,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 869 transitions, 18145 flow, removed 791 selfloop flow, removed 12 redundant places. [2023-08-24 08:34:15,409 INFO L231 Difference]: Finished difference. Result has 476 places, 809 transitions, 16350 flow [2023-08-24 08:34:15,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=14190, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=16350, PETRI_PLACES=476, PETRI_TRANSITIONS=809} [2023-08-24 08:34:15,410 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 455 predicate places. [2023-08-24 08:34:15,410 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 809 transitions, 16350 flow [2023-08-24 08:34:15,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:15,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:15,410 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:15,417 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 08:34:15,615 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,SelfDestructingSolverStorable46 [2023-08-24 08:34:15,615 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:15,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash -676604236, now seen corresponding path program 43 times [2023-08-24 08:34:15,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:15,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005017988] [2023-08-24 08:34:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:15,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005017988] [2023-08-24 08:34:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005017988] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545196976] [2023-08-24 08:34:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:34:16,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:16,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:16,329 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 08:34:16,331 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 08:34:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:16,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 108 conjunts are in the unsatisfiable core [2023-08-24 08:34:16,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:16,650 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 08:34:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:34:16,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:17,050 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse4 (+ c_~A~0.offset 8)) (.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse6))) (.cse2 (+ c_~A~0.offset .cse6 4))) (and (forall ((v_ArrVal_1614 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1614) c_~A~0.base))) (<= (+ .cse0 (select .cse1 .cse2) c_~counter~0) (+ (select .cse1 .cse3) (select .cse1 .cse4) (select .cse1 c_~A~0.offset))))) (forall ((v_ArrVal_1614 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1614) c_~A~0.base))) (< (+ (select .cse5 .cse3) (select .cse5 .cse4) (select .cse5 c_~A~0.offset)) (+ .cse0 (select .cse5 .cse2) c_~counter~0 1))))))) is different from false [2023-08-24 08:34:17,090 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:17,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 127 [2023-08-24 08:34:17,102 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:17,103 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 32 treesize of output 44 [2023-08-24 08:34:17,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:34:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 3 not checked. [2023-08-24 08:34:17,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545196976] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:17,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:17,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 11] total 37 [2023-08-24 08:34:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824726536] [2023-08-24 08:34:17,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:17,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 08:34:17,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 08:34:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1256, Unknown=8, NotChecked=72, Total=1482 [2023-08-24 08:34:17,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:34:17,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 809 transitions, 16350 flow. Second operand has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:17,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:17,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:34:17,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:19,736 INFO L124 PetriNetUnfolderBase]: 2013/3480 cut-off events. [2023-08-24 08:34:19,736 INFO L125 PetriNetUnfolderBase]: For 149653/149653 co-relation queries the response was YES. [2023-08-24 08:34:19,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 3480 events. 2013/3480 cut-off events. For 149653/149653 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21041 event pairs, 260 based on Foata normal form. 1/3473 useless extension candidates. Maximal degree in co-relation 38635. Up to 2637 conditions per place. [2023-08-24 08:34:19,771 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 503 selfloop transitions, 378 changer transitions 1/882 dead transitions. [2023-08-24 08:34:19,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 882 transitions, 19785 flow [2023-08-24 08:34:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:34:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:34:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1773 transitions. [2023-08-24 08:34:19,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26725957190232136 [2023-08-24 08:34:19,774 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1773 transitions. [2023-08-24 08:34:19,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1773 transitions. [2023-08-24 08:34:19,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:19,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1773 transitions. [2023-08-24 08:34:19,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.193548387096776) internal successors, (1773), 31 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:19,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:19,779 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:19,779 INFO L175 Difference]: Start difference. First operand has 476 places, 809 transitions, 16350 flow. Second operand 31 states and 1773 transitions. [2023-08-24 08:34:19,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 882 transitions, 19785 flow [2023-08-24 08:34:20,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 882 transitions, 19286 flow, removed 202 selfloop flow, removed 17 redundant places. [2023-08-24 08:34:20,354 INFO L231 Difference]: Finished difference. Result has 495 places, 836 transitions, 18149 flow [2023-08-24 08:34:20,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=15851, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=18149, PETRI_PLACES=495, PETRI_TRANSITIONS=836} [2023-08-24 08:34:20,355 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 474 predicate places. [2023-08-24 08:34:20,355 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 836 transitions, 18149 flow [2023-08-24 08:34:20,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 54.43589743589744) internal successors, (2123), 39 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:20,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:20,355 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:20,362 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 08:34:20,560 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,SelfDestructingSolverStorable47 [2023-08-24 08:34:20,561 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:20,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:20,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1220180318, now seen corresponding path program 44 times [2023-08-24 08:34:20,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:20,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304515136] [2023-08-24 08:34:20,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:20,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:21,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:21,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304515136] [2023-08-24 08:34:21,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304515136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:21,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563637136] [2023-08-24 08:34:21,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:34:21,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:21,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:21,501 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 08:34:21,517 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 08:34:21,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:34:21,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:21,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-08-24 08:34:21,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:21,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:21,807 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 08:34:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:21,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:22,131 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 8)) (.cse3 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1653 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1653) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1)) (+ (select .cse0 .cse2) (select .cse0 .cse3) (select .cse0 c_~A~0.offset))))) (forall ((v_ArrVal_1653 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1653) c_~A~0.base))) (< (+ (select .cse4 .cse2) (select .cse4 .cse3) (select .cse4 c_~A~0.offset)) (+ c_~counter~0 (select .cse4 .cse1) 1)))))) is different from false [2023-08-24 08:34:22,245 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:22,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 125 [2023-08-24 08:34:22,261 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:22,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 31 treesize of output 43 [2023-08-24 08:34:22,368 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:34:22,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563637136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:22,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:22,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 08:34:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994930605] [2023-08-24 08:34:22,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 08:34:22,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 08:34:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1116, Unknown=14, NotChecked=68, Total=1332 [2023-08-24 08:34:22,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:34:22,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 836 transitions, 18149 flow. Second operand has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:22,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:22,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:34:22,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:25,101 INFO L124 PetriNetUnfolderBase]: 2113/3635 cut-off events. [2023-08-24 08:34:25,101 INFO L125 PetriNetUnfolderBase]: For 168450/168450 co-relation queries the response was YES. [2023-08-24 08:34:25,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42973 conditions, 3635 events. 2113/3635 cut-off events. For 168450/168450 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22058 event pairs, 242 based on Foata normal form. 1/3628 useless extension candidates. Maximal degree in co-relation 42811. Up to 2765 conditions per place. [2023-08-24 08:34:25,148 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 486 selfloop transitions, 440 changer transitions 1/927 dead transitions. [2023-08-24 08:34:25,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 927 transitions, 22383 flow [2023-08-24 08:34:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 08:34:25,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 08:34:25,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1947 transitions. [2023-08-24 08:34:25,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26759208356239694 [2023-08-24 08:34:25,151 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1947 transitions. [2023-08-24 08:34:25,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1947 transitions. [2023-08-24 08:34:25,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:25,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1947 transitions. [2023-08-24 08:34:25,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 57.26470588235294) internal successors, (1947), 34 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:25,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:25,157 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:25,157 INFO L175 Difference]: Start difference. First operand has 495 places, 836 transitions, 18149 flow. Second operand 34 states and 1947 transitions. [2023-08-24 08:34:25,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 927 transitions, 22383 flow [2023-08-24 08:34:26,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 927 transitions, 20950 flow, removed 519 selfloop flow, removed 21 redundant places. [2023-08-24 08:34:26,089 INFO L231 Difference]: Finished difference. Result has 514 places, 882 transitions, 20031 flow [2023-08-24 08:34:26,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=16800, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=20031, PETRI_PLACES=514, PETRI_TRANSITIONS=882} [2023-08-24 08:34:26,090 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 493 predicate places. [2023-08-24 08:34:26,090 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 882 transitions, 20031 flow [2023-08-24 08:34:26,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:26,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:26,090 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:26,096 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 08:34:26,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:26,296 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:26,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:26,297 INFO L85 PathProgramCache]: Analyzing trace with hash -543091988, now seen corresponding path program 45 times [2023-08-24 08:34:26,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:26,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515385971] [2023-08-24 08:34:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:26,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:27,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:27,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:27,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515385971] [2023-08-24 08:34:27,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515385971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:27,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885109222] [2023-08-24 08:34:27,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:34:27,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:27,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:27,103 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 08:34:27,104 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 08:34:27,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 08:34:27,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:27,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 123 conjunts are in the unsatisfiable core [2023-08-24 08:34:27,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:27,404 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 08:34:27,438 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 08:34:27,469 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 08:34:27,708 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:27,708 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 14 [2023-08-24 08:34:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:27,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:28,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885109222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:28,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:28,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 41 [2023-08-24 08:34:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467501596] [2023-08-24 08:34:28,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:28,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:34:28,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:34:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1582, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 08:34:28,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:34:28,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 882 transitions, 20031 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:28,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:28,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:34:28,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:31,341 INFO L124 PetriNetUnfolderBase]: 2266/3897 cut-off events. [2023-08-24 08:34:31,341 INFO L125 PetriNetUnfolderBase]: For 205803/205803 co-relation queries the response was YES. [2023-08-24 08:34:31,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47701 conditions, 3897 events. 2266/3897 cut-off events. For 205803/205803 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23926 event pairs, 411 based on Foata normal form. 2/3893 useless extension candidates. Maximal degree in co-relation 47534. Up to 3455 conditions per place. [2023-08-24 08:34:31,387 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 802 selfloop transitions, 208 changer transitions 7/1017 dead transitions. [2023-08-24 08:34:31,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1017 transitions, 25193 flow [2023-08-24 08:34:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 08:34:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 08:34:31,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2796 transitions. [2023-08-24 08:34:31,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26664123593362576 [2023-08-24 08:34:31,391 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2796 transitions. [2023-08-24 08:34:31,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2796 transitions. [2023-08-24 08:34:31,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:31,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2796 transitions. [2023-08-24 08:34:31,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 57.06122448979592) internal successors, (2796), 49 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:31,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 214.0) internal successors, (10700), 50 states have internal predecessors, (10700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:31,410 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 214.0) internal successors, (10700), 50 states have internal predecessors, (10700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:31,410 INFO L175 Difference]: Start difference. First operand has 514 places, 882 transitions, 20031 flow. Second operand 49 states and 2796 transitions. [2023-08-24 08:34:31,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1017 transitions, 25193 flow [2023-08-24 08:34:32,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 1017 transitions, 22811 flow, removed 945 selfloop flow, removed 24 redundant places. [2023-08-24 08:34:32,479 INFO L231 Difference]: Finished difference. Result has 547 places, 943 transitions, 20830 flow [2023-08-24 08:34:32,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=17758, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=882, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=20830, PETRI_PLACES=547, PETRI_TRANSITIONS=943} [2023-08-24 08:34:32,481 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 526 predicate places. [2023-08-24 08:34:32,481 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 943 transitions, 20830 flow [2023-08-24 08:34:32,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:32,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:32,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:32,488 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 08:34:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 08:34:32,685 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:32,685 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2052210378, now seen corresponding path program 46 times [2023-08-24 08:34:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:32,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585797428] [2023-08-24 08:34:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:32,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:33,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:33,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585797428] [2023-08-24 08:34:33,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585797428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239869747] [2023-08-24 08:34:33,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:34:33,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:33,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:33,332 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 08:34:33,333 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 08:34:33,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:34:33,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:33,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-24 08:34:33,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:33,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:33,681 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 08:34:33,924 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:33,925 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 15 treesize of output 14 [2023-08-24 08:34:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:33,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:34,502 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset 4)) (.cse1 (+ c_~A~0.offset .cse5)) (.cse2 (+ c_~A~0.offset .cse5 4))) (and (forall ((v_ArrVal_1734 (Array Int Int)) (v_subst_22 Int)) (or (< (+ v_subst_22 1) c_~N~0) (<= c_~N~0 v_subst_22) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1734) c_~A~0.base))) (<= (+ (select .cse0 .cse1) c_~counter~0 (select .cse0 .cse2)) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse3) (select .cse0 (+ c_~A~0.offset (* v_subst_22 4)))))))) (forall ((v_ArrVal_1734 (Array Int Int)) (v_subst_21 Int)) (or (<= c_~N~0 v_subst_21) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1734) c_~A~0.base))) (< (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse3) (select .cse4 (+ (* v_subst_21 4) c_~A~0.offset))) (+ (select .cse4 .cse1) c_~counter~0 (select .cse4 .cse2) 1))) (< (+ v_subst_21 1) c_~N~0)))))) is different from false [2023-08-24 08:34:34,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:34,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 110 treesize of output 156 [2023-08-24 08:34:34,587 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:34,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 41 treesize of output 90 [2023-08-24 08:34:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:34:35,373 INFO L322 Elim1Store]: treesize reduction 44, result has 55.6 percent of original size [2023-08-24 08:34:35,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 65 [2023-08-24 08:34:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:35,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239869747] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:35,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:35,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 08:34:35,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5569232] [2023-08-24 08:34:35,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:35,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 08:34:35,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:35,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 08:34:35,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1703, Unknown=1, NotChecked=84, Total=1980 [2023-08-24 08:34:35,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 08:34:35,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 943 transitions, 20830 flow. Second operand has 45 states, 45 states have (on average 57.44444444444444) internal successors, (2585), 45 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:35,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:35,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 08:34:35,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:38,386 INFO L124 PetriNetUnfolderBase]: 2348/4042 cut-off events. [2023-08-24 08:34:38,386 INFO L125 PetriNetUnfolderBase]: For 217089/217089 co-relation queries the response was YES. [2023-08-24 08:34:38,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48461 conditions, 4042 events. 2348/4042 cut-off events. For 217089/217089 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25048 event pairs, 304 based on Foata normal form. 1/4033 useless extension candidates. Maximal degree in co-relation 48286. Up to 3550 conditions per place. [2023-08-24 08:34:38,441 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 749 selfloop transitions, 283 changer transitions 3/1035 dead transitions. [2023-08-24 08:34:38,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 1035 transitions, 24809 flow [2023-08-24 08:34:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 08:34:38,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 08:34:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1808 transitions. [2023-08-24 08:34:38,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28161993769470406 [2023-08-24 08:34:38,443 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1808 transitions. [2023-08-24 08:34:38,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1808 transitions. [2023-08-24 08:34:38,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:38,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1808 transitions. [2023-08-24 08:34:38,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 60.266666666666666) internal successors, (1808), 30 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:38,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:38,448 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 214.0) internal successors, (6634), 31 states have internal predecessors, (6634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:38,448 INFO L175 Difference]: Start difference. First operand has 547 places, 943 transitions, 20830 flow. Second operand 30 states and 1808 transitions. [2023-08-24 08:34:38,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 1035 transitions, 24809 flow [2023-08-24 08:34:39,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 1035 transitions, 23465 flow, removed 616 selfloop flow, removed 26 redundant places. [2023-08-24 08:34:39,529 INFO L231 Difference]: Finished difference. Result has 555 places, 990 transitions, 21933 flow [2023-08-24 08:34:39,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=19486, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=21933, PETRI_PLACES=555, PETRI_TRANSITIONS=990} [2023-08-24 08:34:39,530 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 534 predicate places. [2023-08-24 08:34:39,531 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 990 transitions, 21933 flow [2023-08-24 08:34:39,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 57.44444444444444) internal successors, (2585), 45 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:39,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:39,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:39,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-24 08:34:39,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:39,732 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:39,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1961719594, now seen corresponding path program 47 times [2023-08-24 08:34:39,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:39,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448052375] [2023-08-24 08:34:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:39,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:40,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448052375] [2023-08-24 08:34:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448052375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:40,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569708874] [2023-08-24 08:34:40,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:34:40,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:40,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:40,495 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 08:34:40,497 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 08:34:40,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:34:40,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:40,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:34:40,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:40,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:41,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:41,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:34:41,191 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:34:41,191 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:34:41,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:41,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569708874] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:41,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:41,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-24 08:34:41,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513293751] [2023-08-24 08:34:41,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:41,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:34:41,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:41,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:34:41,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:34:41,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:34:41,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 990 transitions, 21933 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 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 08:34:41,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:41,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:34:41,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:43,721 INFO L124 PetriNetUnfolderBase]: 2509/4305 cut-off events. [2023-08-24 08:34:43,721 INFO L125 PetriNetUnfolderBase]: For 255194/255194 co-relation queries the response was YES. [2023-08-24 08:34:43,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54105 conditions, 4305 events. 2509/4305 cut-off events. For 255194/255194 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26825 event pairs, 288 based on Foata normal form. 3/4298 useless extension candidates. Maximal degree in co-relation 53924. Up to 3652 conditions per place. [2023-08-24 08:34:43,772 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 808 selfloop transitions, 293 changer transitions 4/1105 dead transitions. [2023-08-24 08:34:43,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 1105 transitions, 27854 flow [2023-08-24 08:34:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 08:34:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 08:34:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1851 transitions. [2023-08-24 08:34:43,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2702978971962617 [2023-08-24 08:34:43,774 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1851 transitions. [2023-08-24 08:34:43,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1851 transitions. [2023-08-24 08:34:43,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:43,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1851 transitions. [2023-08-24 08:34:43,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.84375) internal successors, (1851), 32 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:43,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:43,778 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:43,778 INFO L175 Difference]: Start difference. First operand has 555 places, 990 transitions, 21933 flow. Second operand 32 states and 1851 transitions. [2023-08-24 08:34:43,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 1105 transitions, 27854 flow [2023-08-24 08:34:45,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 1105 transitions, 27243 flow, removed 234 selfloop flow, removed 18 redundant places. [2023-08-24 08:34:45,058 INFO L231 Difference]: Finished difference. Result has 575 places, 1052 transitions, 25332 flow [2023-08-24 08:34:45,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=21322, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=25332, PETRI_PLACES=575, PETRI_TRANSITIONS=1052} [2023-08-24 08:34:45,059 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 554 predicate places. [2023-08-24 08:34:45,059 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 1052 transitions, 25332 flow [2023-08-24 08:34:45,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 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 08:34:45,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:45,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:45,065 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 08:34:45,265 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,SelfDestructingSolverStorable51 [2023-08-24 08:34:45,265 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:45,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash 543403990, now seen corresponding path program 48 times [2023-08-24 08:34:45,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:45,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962527976] [2023-08-24 08:34:45,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:45,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:45,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962527976] [2023-08-24 08:34:45,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962527976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:45,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351908835] [2023-08-24 08:34:45,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:34:45,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:45,915 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 08:34:45,917 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 08:34:46,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:34:46,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:46,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 118 conjunts are in the unsatisfiable core [2023-08-24 08:34:46,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:46,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:46,268 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 08:34:46,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:46,492 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:46,492 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 30 treesize of output 33 [2023-08-24 08:34:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:46,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:47,069 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse2 (+ c_~A~0.offset .cse6 4)) (.cse3 (+ c_~A~0.offset .cse6))) (and (forall ((v_ArrVal_1811 (Array Int Int)) (v_subst_24 Int)) (or (<= c_~N~0 (+ v_subst_24 1)) (< (+ 2 v_subst_24) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1811) c_~A~0.base))) (< (let ((.cse1 (* v_subst_24 4))) (+ (select .cse0 c_~A~0.offset) (select .cse0 (+ c_~A~0.offset .cse1)) (select .cse0 (+ c_~A~0.offset .cse1 4)))) (+ c_~counter~0 (select .cse0 .cse2) (select .cse0 .cse3) 1))))) (forall ((v_ArrVal_1811 (Array Int Int)) (v_subst_23 Int)) (or (< (+ 2 v_subst_23) c_~N~0) (<= c_~N~0 (+ v_subst_23 1)) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1811) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse4 .cse2) (select .cse4 .cse3)) (let ((.cse5 (* v_subst_23 4))) (+ (select .cse4 c_~A~0.offset) (select .cse4 (+ c_~A~0.offset .cse5)) (select .cse4 (+ c_~A~0.offset .cse5 4))))))))))) is different from false [2023-08-24 08:34:47,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:47,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 114 treesize of output 161 [2023-08-24 08:34:47,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:47,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 91 [2023-08-24 08:34:47,852 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:34:47,905 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:34:47,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-24 08:34:48,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:48,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351908835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:48,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:48,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-08-24 08:34:48,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345321791] [2023-08-24 08:34:48,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:48,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 08:34:48,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:48,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 08:34:48,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1641, Unknown=1, NotChecked=82, Total=1892 [2023-08-24 08:34:48,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 08:34:48,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 1052 transitions, 25332 flow. Second operand has 44 states, 44 states have (on average 57.43181818181818) internal successors, (2527), 44 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:48,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:48,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 08:34:48,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:51,301 INFO L124 PetriNetUnfolderBase]: 2612/4504 cut-off events. [2023-08-24 08:34:51,301 INFO L125 PetriNetUnfolderBase]: For 290812/290812 co-relation queries the response was YES. [2023-08-24 08:34:51,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57741 conditions, 4504 events. 2612/4504 cut-off events. For 290812/290812 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28582 event pairs, 283 based on Foata normal form. 2/4496 useless extension candidates. Maximal degree in co-relation 57552. Up to 4042 conditions per place. [2023-08-24 08:34:51,358 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 918 selfloop transitions, 222 changer transitions 7/1147 dead transitions. [2023-08-24 08:34:51,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1147 transitions, 29291 flow [2023-08-24 08:34:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 08:34:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 08:34:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2284 transitions. [2023-08-24 08:34:51,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2808657156910969 [2023-08-24 08:34:51,360 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2284 transitions. [2023-08-24 08:34:51,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2284 transitions. [2023-08-24 08:34:51,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:51,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2284 transitions. [2023-08-24 08:34:51,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 60.10526315789474) internal successors, (2284), 38 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:51,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 214.0) internal successors, (8346), 39 states have internal predecessors, (8346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:51,365 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 214.0) internal successors, (8346), 39 states have internal predecessors, (8346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:51,365 INFO L175 Difference]: Start difference. First operand has 575 places, 1052 transitions, 25332 flow. Second operand 38 states and 2284 transitions. [2023-08-24 08:34:51,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1147 transitions, 29291 flow [2023-08-24 08:34:52,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 596 places, 1147 transitions, 26809 flow, removed 1186 selfloop flow, removed 16 redundant places. [2023-08-24 08:34:52,816 INFO L231 Difference]: Finished difference. Result has 601 places, 1086 transitions, 24660 flow [2023-08-24 08:34:52,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=22862, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=24660, PETRI_PLACES=601, PETRI_TRANSITIONS=1086} [2023-08-24 08:34:52,817 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 580 predicate places. [2023-08-24 08:34:52,817 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1086 transitions, 24660 flow [2023-08-24 08:34:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 57.43181818181818) internal successors, (2527), 44 states have internal predecessors, (2527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:52,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:52,818 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:52,823 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 08:34:53,022 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,SelfDestructingSolverStorable52 [2023-08-24 08:34:53,023 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:53,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:53,023 INFO L85 PathProgramCache]: Analyzing trace with hash -698298900, now seen corresponding path program 49 times [2023-08-24 08:34:53,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:53,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243754119] [2023-08-24 08:34:53,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:53,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:53,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:53,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243754119] [2023-08-24 08:34:53,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243754119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:53,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253370745] [2023-08-24 08:34:53,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:34:53,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:53,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:53,607 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 08:34:53,609 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 08:34:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:53,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:34:53,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:53,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:54,132 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:54,132 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:34:54,275 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:34:54,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:34:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:34:54,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253370745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:54,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:54,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 30 [2023-08-24 08:34:54,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421850675] [2023-08-24 08:34:54,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:54,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:34:54,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:54,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:34:54,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2023-08-24 08:34:54,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:34:54,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1086 transitions, 24660 flow. Second operand has 32 states, 32 states have (on average 61.71875) internal successors, (1975), 32 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:54,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:54,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:34:54,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:56,908 INFO L124 PetriNetUnfolderBase]: 2694/4632 cut-off events. [2023-08-24 08:34:56,908 INFO L125 PetriNetUnfolderBase]: For 261868/261868 co-relation queries the response was YES. [2023-08-24 08:34:56,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57233 conditions, 4632 events. 2694/4632 cut-off events. For 261868/261868 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29361 event pairs, 568 based on Foata normal form. 2/4618 useless extension candidates. Maximal degree in co-relation 57040. Up to 4346 conditions per place. [2023-08-24 08:34:56,977 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 997 selfloop transitions, 161 changer transitions 4/1162 dead transitions. [2023-08-24 08:34:56,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 631 places, 1162 transitions, 29730 flow [2023-08-24 08:34:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:34:56,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:34:56,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1987 transitions. [2023-08-24 08:34:56,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2995176364184504 [2023-08-24 08:34:56,979 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1987 transitions. [2023-08-24 08:34:56,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1987 transitions. [2023-08-24 08:34:56,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:56,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1987 transitions. [2023-08-24 08:34:56,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 64.09677419354838) internal successors, (1987), 31 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 08:34:56,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:56,983 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:56,983 INFO L175 Difference]: Start difference. First operand has 601 places, 1086 transitions, 24660 flow. Second operand 31 states and 1987 transitions. [2023-08-24 08:34:56,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 631 places, 1162 transitions, 29730 flow [2023-08-24 08:34:58,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1162 transitions, 28953 flow, removed 312 selfloop flow, removed 23 redundant places. [2023-08-24 08:34:58,600 INFO L231 Difference]: Finished difference. Result has 612 places, 1126 transitions, 26800 flow [2023-08-24 08:34:58,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=23883, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1086, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=951, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=26800, PETRI_PLACES=612, PETRI_TRANSITIONS=1126} [2023-08-24 08:34:58,602 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 591 predicate places. [2023-08-24 08:34:58,602 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 1126 transitions, 26800 flow [2023-08-24 08:34:58,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 61.71875) internal successors, (1975), 32 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:34:58,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:58,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:34:58,608 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 08:34:58,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:58,809 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:34:58,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:58,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1574304502, now seen corresponding path program 50 times [2023-08-24 08:34:58,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:58,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894498103] [2023-08-24 08:34:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:34:59,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894498103] [2023-08-24 08:34:59,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894498103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:59,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825982372] [2023-08-24 08:34:59,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:34:59,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:59,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:59,615 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 08:34:59,618 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 08:34:59,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:34:59,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:59,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 102 conjunts are in the unsatisfiable core [2023-08-24 08:34:59,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:59,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:59,870 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 08:35:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:00,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:00,297 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:00,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 132 [2023-08-24 08:35:00,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:00,322 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 69 [2023-08-24 08:35:00,490 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:35:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:00,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825982372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:00,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:00,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 08:35:00,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139586546] [2023-08-24 08:35:00,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:00,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 08:35:00,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 08:35:00,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1185, Unknown=13, NotChecked=0, Total=1332 [2023-08-24 08:35:00,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:35:00,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 1126 transitions, 26800 flow. Second operand has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:00,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:00,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:35:00,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:03,692 INFO L124 PetriNetUnfolderBase]: 2729/4691 cut-off events. [2023-08-24 08:35:03,693 INFO L125 PetriNetUnfolderBase]: For 274792/274792 co-relation queries the response was YES. [2023-08-24 08:35:03,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58411 conditions, 4691 events. 2729/4691 cut-off events. For 274792/274792 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 29902 event pairs, 294 based on Foata normal form. 1/4676 useless extension candidates. Maximal degree in co-relation 58213. Up to 3699 conditions per place. [2023-08-24 08:35:03,762 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 785 selfloop transitions, 395 changer transitions 1/1181 dead transitions. [2023-08-24 08:35:03,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 1181 transitions, 30644 flow [2023-08-24 08:35:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 08:35:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 08:35:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1600 transitions. [2023-08-24 08:35:03,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26702269692923897 [2023-08-24 08:35:03,764 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1600 transitions. [2023-08-24 08:35:03,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1600 transitions. [2023-08-24 08:35:03,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:03,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1600 transitions. [2023-08-24 08:35:03,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.142857142857146) internal successors, (1600), 28 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:03,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:03,768 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:03,768 INFO L175 Difference]: Start difference. First operand has 612 places, 1126 transitions, 26800 flow. Second operand 28 states and 1600 transitions. [2023-08-24 08:35:03,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 1181 transitions, 30644 flow [2023-08-24 08:35:05,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1181 transitions, 28380 flow, removed 1075 selfloop flow, removed 19 redundant places. [2023-08-24 08:35:05,407 INFO L231 Difference]: Finished difference. Result has 625 places, 1142 transitions, 26570 flow [2023-08-24 08:35:05,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=24536, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26570, PETRI_PLACES=625, PETRI_TRANSITIONS=1142} [2023-08-24 08:35:05,409 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 604 predicate places. [2023-08-24 08:35:05,409 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 1142 transitions, 26570 flow [2023-08-24 08:35:05,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.45945945945946) internal successors, (2015), 37 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:05,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:05,409 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:05,416 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 08:35:05,614 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,SelfDestructingSolverStorable54 [2023-08-24 08:35:05,614 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:05,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1450497636, now seen corresponding path program 51 times [2023-08-24 08:35:05,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:05,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80204354] [2023-08-24 08:35:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:05,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:05,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:06,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:06,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80204354] [2023-08-24 08:35:06,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80204354] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:06,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060373534] [2023-08-24 08:35:06,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:35:06,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:06,458 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 08:35:06,460 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 08:35:06,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:35:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:06,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-08-24 08:35:06,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:07,016 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:07,016 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 32 treesize of output 33 [2023-08-24 08:35:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:07,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:07,773 INFO L322 Elim1Store]: treesize reduction 44, result has 62.4 percent of original size [2023-08-24 08:35:07,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 83 [2023-08-24 08:35:07,896 INFO L322 Elim1Store]: treesize reduction 68, result has 41.9 percent of original size [2023-08-24 08:35:07,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 60 [2023-08-24 08:35:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060373534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:08,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:08,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 08:35:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811385439] [2023-08-24 08:35:08,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:08,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 08:35:08,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:08,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 08:35:08,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1746, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 08:35:08,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:35:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 1142 transitions, 26570 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:35:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:12,994 INFO L124 PetriNetUnfolderBase]: 2749/4737 cut-off events. [2023-08-24 08:35:12,994 INFO L125 PetriNetUnfolderBase]: For 276262/276262 co-relation queries the response was YES. [2023-08-24 08:35:13,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58096 conditions, 4737 events. 2749/4737 cut-off events. For 276262/276262 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 30334 event pairs, 357 based on Foata normal form. 2/4707 useless extension candidates. Maximal degree in co-relation 57893. Up to 4366 conditions per place. [2023-08-24 08:35:13,075 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1002 selfloop transitions, 210 changer transitions 9/1221 dead transitions. [2023-08-24 08:35:13,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 676 places, 1221 transitions, 30249 flow [2023-08-24 08:35:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 08:35:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 08:35:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 2946 transitions. [2023-08-24 08:35:13,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2647375988497484 [2023-08-24 08:35:13,077 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 2946 transitions. [2023-08-24 08:35:13,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 2946 transitions. [2023-08-24 08:35:13,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:13,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 2946 transitions. [2023-08-24 08:35:13,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 56.65384615384615) internal successors, (2946), 52 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:13,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 214.0) internal successors, (11342), 53 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:13,085 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 214.0) internal successors, (11342), 53 states have internal predecessors, (11342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:13,085 INFO L175 Difference]: Start difference. First operand has 625 places, 1142 transitions, 26570 flow. Second operand 52 states and 2946 transitions. [2023-08-24 08:35:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 676 places, 1221 transitions, 30249 flow [2023-08-24 08:35:14,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 1221 transitions, 29003 flow, removed 516 selfloop flow, removed 20 redundant places. [2023-08-24 08:35:14,591 INFO L231 Difference]: Finished difference. Result has 663 places, 1160 transitions, 26827 flow [2023-08-24 08:35:14,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=25328, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=940, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=26827, PETRI_PLACES=663, PETRI_TRANSITIONS=1160} [2023-08-24 08:35:14,592 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 642 predicate places. [2023-08-24 08:35:14,592 INFO L495 AbstractCegarLoop]: Abstraction has has 663 places, 1160 transitions, 26827 flow [2023-08-24 08:35:14,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:14,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:14,593 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:14,599 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 08:35:14,797 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,SelfDestructingSolverStorable55 [2023-08-24 08:35:14,798 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:14,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:14,798 INFO L85 PathProgramCache]: Analyzing trace with hash -463151892, now seen corresponding path program 52 times [2023-08-24 08:35:14,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:14,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201431275] [2023-08-24 08:35:14,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:14,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:15,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201431275] [2023-08-24 08:35:15,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201431275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:15,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102694440] [2023-08-24 08:35:15,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:35:15,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:15,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:15,574 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 08:35:15,576 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 08:35:15,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:35:15,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:15,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-24 08:35:15,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:15,933 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 08:35:16,125 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:16,125 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 15 treesize of output 14 [2023-08-24 08:35:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:16,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:16,606 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset 4)) (.cse3 (+ c_~A~0.offset 8)) (.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (and (forall ((v_ArrVal_1965 (Array Int Int)) (v_subst_29 Int)) (or (< (+ v_subst_29 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1965) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse0 .cse1) (select .cse0 (+ c_~A~0.offset (* v_subst_29 4)))) (+ (select .cse0 c_~A~0.offset) (select .cse0 .cse2) (select .cse0 .cse3)))) (<= c_~N~0 v_subst_29))) (forall ((v_ArrVal_1965 (Array Int Int)) (v_subst_30 Int)) (or (<= c_~N~0 v_subst_30) (< (+ v_subst_30 1) c_~N~0) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1965) c_~A~0.base))) (< (+ (select .cse4 c_~A~0.offset) (select .cse4 .cse2) (select .cse4 .cse3)) (+ (select .cse4 (+ c_~A~0.offset (* v_subst_30 4))) c_~counter~0 (select .cse4 .cse1) 1))))))) is different from false [2023-08-24 08:35:16,645 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:16,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 147 [2023-08-24 08:35:16,671 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:16,672 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 76 [2023-08-24 08:35:17,421 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:35:17,466 INFO L322 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-24 08:35:17,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 59 [2023-08-24 08:35:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:17,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102694440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:17,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:17,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2023-08-24 08:35:17,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216273900] [2023-08-24 08:35:17,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:17,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 08:35:17,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 08:35:17,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1627, Unknown=1, NotChecked=82, Total=1892 [2023-08-24 08:35:17,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:35:17,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 663 places, 1160 transitions, 26827 flow. Second operand has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:17,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:17,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:35:17,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:21,519 INFO L124 PetriNetUnfolderBase]: 2833/4884 cut-off events. [2023-08-24 08:35:21,519 INFO L125 PetriNetUnfolderBase]: For 296125/296125 co-relation queries the response was YES. [2023-08-24 08:35:21,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60217 conditions, 4884 events. 2833/4884 cut-off events. For 296125/296125 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 31480 event pairs, 351 based on Foata normal form. 1/4853 useless extension candidates. Maximal degree in co-relation 60010. Up to 3965 conditions per place. [2023-08-24 08:35:21,582 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 884 selfloop transitions, 365 changer transitions 3/1252 dead transitions. [2023-08-24 08:35:21,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 693 places, 1252 transitions, 31664 flow [2023-08-24 08:35:21,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 08:35:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 08:35:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1830 transitions. [2023-08-24 08:35:21,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26723130841121495 [2023-08-24 08:35:21,584 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1830 transitions. [2023-08-24 08:35:21,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1830 transitions. [2023-08-24 08:35:21,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:21,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1830 transitions. [2023-08-24 08:35:21,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.1875) internal successors, (1830), 32 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:21,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:21,588 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 214.0) internal successors, (7062), 33 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:21,588 INFO L175 Difference]: Start difference. First operand has 663 places, 1160 transitions, 26827 flow. Second operand 32 states and 1830 transitions. [2023-08-24 08:35:21,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 693 places, 1252 transitions, 31664 flow [2023-08-24 08:35:22,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 1252 transitions, 30850 flow, removed 358 selfloop flow, removed 28 redundant places. [2023-08-24 08:35:23,016 INFO L231 Difference]: Finished difference. Result has 668 places, 1191 transitions, 28494 flow [2023-08-24 08:35:23,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=26013, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=28494, PETRI_PLACES=668, PETRI_TRANSITIONS=1191} [2023-08-24 08:35:23,017 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 647 predicate places. [2023-08-24 08:35:23,017 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 1191 transitions, 28494 flow [2023-08-24 08:35:23,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.31818181818182) internal successors, (2390), 44 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:23,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:23,017 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:23,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-24 08:35:23,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:23,222 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:23,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1920618146, now seen corresponding path program 53 times [2023-08-24 08:35:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:23,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024357469] [2023-08-24 08:35:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:23,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024357469] [2023-08-24 08:35:23,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024357469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:23,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854262153] [2023-08-24 08:35:23,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:35:23,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:23,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:23,778 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 08:35:23,780 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 08:35:23,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:35:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:23,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 116 conjunts are in the unsatisfiable core [2023-08-24 08:35:23,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:24,020 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 08:35:24,052 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 08:35:24,078 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 08:35:24,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:24,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:24,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:24,345 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:24,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 44 treesize of output 59 [2023-08-24 08:35:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:24,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:25,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854262153] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:25,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:25,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 9] total 35 [2023-08-24 08:35:25,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777158156] [2023-08-24 08:35:25,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:25,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 08:35:25,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 08:35:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 08:35:25,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:35:25,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 1191 transitions, 28494 flow. Second operand has 37 states, 37 states have (on average 54.513513513513516) internal successors, (2017), 37 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 08:35:25,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:25,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:35:25,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:28,813 INFO L124 PetriNetUnfolderBase]: 3002/5176 cut-off events. [2023-08-24 08:35:28,813 INFO L125 PetriNetUnfolderBase]: For 343133/343133 co-relation queries the response was YES. [2023-08-24 08:35:28,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67002 conditions, 5176 events. 3002/5176 cut-off events. For 343133/343133 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33923 event pairs, 441 based on Foata normal form. 1/5145 useless extension candidates. Maximal degree in co-relation 66792. Up to 4536 conditions per place. [2023-08-24 08:35:28,892 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1048 selfloop transitions, 253 changer transitions 2/1303 dead transitions. [2023-08-24 08:35:28,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 698 places, 1303 transitions, 35059 flow [2023-08-24 08:35:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:35:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:35:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1775 transitions. [2023-08-24 08:35:28,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2675610491407899 [2023-08-24 08:35:28,894 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1775 transitions. [2023-08-24 08:35:28,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1775 transitions. [2023-08-24 08:35:28,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:28,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1775 transitions. [2023-08-24 08:35:28,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.25806451612903) internal successors, (1775), 31 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:28,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:28,898 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:28,898 INFO L175 Difference]: Start difference. First operand has 668 places, 1191 transitions, 28494 flow. Second operand 31 states and 1775 transitions. [2023-08-24 08:35:28,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 698 places, 1303 transitions, 35059 flow [2023-08-24 08:35:30,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 674 places, 1303 transitions, 34535 flow, removed 157 selfloop flow, removed 24 redundant places. [2023-08-24 08:35:30,773 INFO L231 Difference]: Finished difference. Result has 680 places, 1255 transitions, 31916 flow [2023-08-24 08:35:30,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=27970, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=978, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=31916, PETRI_PLACES=680, PETRI_TRANSITIONS=1255} [2023-08-24 08:35:30,774 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 659 predicate places. [2023-08-24 08:35:30,774 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 1255 transitions, 31916 flow [2023-08-24 08:35:30,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 54.513513513513516) internal successors, (2017), 37 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 08:35:30,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:30,774 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:30,779 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 08:35:30,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:30,979 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:30,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1059102814, now seen corresponding path program 54 times [2023-08-24 08:35:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125464208] [2023-08-24 08:35:30,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:30,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:31,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:31,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125464208] [2023-08-24 08:35:31,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125464208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:31,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661083244] [2023-08-24 08:35:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:35:31,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:31,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:31,696 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 08:35:31,697 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 08:35:31,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:35:31,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:31,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:35:31,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:32,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:32,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:32,328 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:32,328 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:35:32,460 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:35:32,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:35:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:32,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661083244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:32,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:32,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-24 08:35:32,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959632676] [2023-08-24 08:35:32,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:32,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:35:32,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:32,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:35:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:35:32,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:35:32,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 1255 transitions, 31916 flow. Second operand has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 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 08:35:32,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:32,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:35:32,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:35,962 INFO L124 PetriNetUnfolderBase]: 3104/5353 cut-off events. [2023-08-24 08:35:35,962 INFO L125 PetriNetUnfolderBase]: For 396388/396388 co-relation queries the response was YES. [2023-08-24 08:35:36,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72186 conditions, 5353 events. 3104/5353 cut-off events. For 396388/396388 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 35373 event pairs, 326 based on Foata normal form. 3/5322 useless extension candidates. Maximal degree in co-relation 71972. Up to 4957 conditions per place. [2023-08-24 08:35:36,043 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1149 selfloop transitions, 177 changer transitions 5/1331 dead transitions. [2023-08-24 08:35:36,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 1331 transitions, 36821 flow [2023-08-24 08:35:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 08:35:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 08:35:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1621 transitions. [2023-08-24 08:35:36,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27052736982643527 [2023-08-24 08:35:36,045 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1621 transitions. [2023-08-24 08:35:36,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1621 transitions. [2023-08-24 08:35:36,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:36,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1621 transitions. [2023-08-24 08:35:36,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 57.892857142857146) internal successors, (1621), 28 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:36,049 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:36,049 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:36,049 INFO L175 Difference]: Start difference. First operand has 680 places, 1255 transitions, 31916 flow. Second operand 28 states and 1621 transitions. [2023-08-24 08:35:36,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 1331 transitions, 36821 flow [2023-08-24 08:35:37,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 1331 transitions, 35217 flow, removed 752 selfloop flow, removed 13 redundant places. [2023-08-24 08:35:37,849 INFO L231 Difference]: Finished difference. Result has 701 places, 1277 transitions, 32328 flow [2023-08-24 08:35:37,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=30312, PETRI_DIFFERENCE_MINUEND_PLACES=667, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1090, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=32328, PETRI_PLACES=701, PETRI_TRANSITIONS=1277} [2023-08-24 08:35:37,850 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 680 predicate places. [2023-08-24 08:35:37,850 INFO L495 AbstractCegarLoop]: Abstraction has has 701 places, 1277 transitions, 32328 flow [2023-08-24 08:35:37,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.63636363636363) internal successors, (1803), 33 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 08:35:37,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:37,850 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:37,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-24 08:35:38,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:38,055 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:38,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:38,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1060273284, now seen corresponding path program 55 times [2023-08-24 08:35:38,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:38,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977231773] [2023-08-24 08:35:38,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:38,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:38,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:38,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:38,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977231773] [2023-08-24 08:35:38,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977231773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:38,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366394294] [2023-08-24 08:35:38,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:35:38,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:38,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:38,587 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 08:35:38,588 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 08:35:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:38,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:35:38,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:38,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:38,955 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:35:38,956 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:35:38,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:38,959 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 61 treesize of output 23 [2023-08-24 08:35:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:38,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:39,171 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:39,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:35:39,359 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:35:39,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:35:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:39,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366394294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:39,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:39,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 26 [2023-08-24 08:35:39,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539865918] [2023-08-24 08:35:39,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:39,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 08:35:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:39,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 08:35:39,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2023-08-24 08:35:39,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:35:39,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 1277 transitions, 32328 flow. Second operand has 28 states, 28 states have (on average 61.714285714285715) internal successors, (1728), 28 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:39,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:39,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:35:39,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:42,314 INFO L124 PetriNetUnfolderBase]: 3163/5448 cut-off events. [2023-08-24 08:35:42,315 INFO L125 PetriNetUnfolderBase]: For 429235/429235 co-relation queries the response was YES. [2023-08-24 08:35:42,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73817 conditions, 5448 events. 3163/5448 cut-off events. For 429235/429235 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 36054 event pairs, 549 based on Foata normal form. 2/5416 useless extension candidates. Maximal degree in co-relation 73595. Up to 5189 conditions per place. [2023-08-24 08:35:42,401 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 1189 selfloop transitions, 133 changer transitions 2/1324 dead transitions. [2023-08-24 08:35:42,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1324 transitions, 36399 flow [2023-08-24 08:35:42,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:35:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:35:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1546 transitions. [2023-08-24 08:35:42,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30101246105919005 [2023-08-24 08:35:42,403 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1546 transitions. [2023-08-24 08:35:42,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1546 transitions. [2023-08-24 08:35:42,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:42,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1546 transitions. [2023-08-24 08:35:42,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.41666666666667) internal successors, (1546), 24 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:42,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 214.0) internal successors, (5350), 25 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:42,406 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 214.0) internal successors, (5350), 25 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:42,406 INFO L175 Difference]: Start difference. First operand has 701 places, 1277 transitions, 32328 flow. Second operand 24 states and 1546 transitions. [2023-08-24 08:35:42,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1324 transitions, 36399 flow [2023-08-24 08:35:44,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 707 places, 1324 transitions, 35458 flow, removed 394 selfloop flow, removed 17 redundant places. [2023-08-24 08:35:44,789 INFO L231 Difference]: Finished difference. Result has 711 places, 1291 transitions, 32644 flow [2023-08-24 08:35:44,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=31387, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=32644, PETRI_PLACES=711, PETRI_TRANSITIONS=1291} [2023-08-24 08:35:44,791 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 690 predicate places. [2023-08-24 08:35:44,791 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 1291 transitions, 32644 flow [2023-08-24 08:35:44,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 61.714285714285715) internal successors, (1728), 28 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:44,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:44,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:44,796 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 08:35:44,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-24 08:35:44,996 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:44,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash -421139476, now seen corresponding path program 56 times [2023-08-24 08:35:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:44,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766503966] [2023-08-24 08:35:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766503966] [2023-08-24 08:35:45,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766503966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807220176] [2023-08-24 08:35:45,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:35:45,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:45,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:45,651 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 08:35:45,653 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 08:35:45,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:35:45,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:45,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 104 conjunts are in the unsatisfiable core [2023-08-24 08:35:45,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:45,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:35:45,909 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 08:35:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:46,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:46,248 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) (let ((.cse3 (+ c_~A~0.offset .cse6 4)) (.cse4 (+ c_~A~0.offset .cse6)) (.cse1 (+ c_~A~0.offset 4)) (.cse2 (+ c_~A~0.offset 8))) (and (forall ((v_ArrVal_2122 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2122) c_~A~0.base))) (< (+ (select .cse0 .cse1) (select .cse0 c_~A~0.offset) (select .cse0 .cse2)) (+ (select .cse0 .cse3) (select .cse0 .cse4) c_~counter~0 1)))) (forall ((v_ArrVal_2122 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2122) c_~A~0.base))) (<= (+ (select .cse5 .cse3) (select .cse5 .cse4) c_~counter~0) (+ (select .cse5 .cse1) (select .cse5 c_~A~0.offset) (select .cse5 .cse2)))))))) is different from false [2023-08-24 08:35:46,282 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:46,283 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 134 [2023-08-24 08:35:46,309 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:46,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 39 treesize of output 70 [2023-08-24 08:35:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:35:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:35:46,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807220176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:46,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:46,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-24 08:35:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766091147] [2023-08-24 08:35:46,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:46,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 08:35:46,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 08:35:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1110, Unknown=1, NotChecked=68, Total=1332 [2023-08-24 08:35:46,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 214 [2023-08-24 08:35:46,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 1291 transitions, 32644 flow. Second operand has 37 states, 37 states have (on average 57.45945945945946) internal successors, (2126), 37 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:46,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:46,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 214 [2023-08-24 08:35:46,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:50,289 INFO L124 PetriNetUnfolderBase]: 3299/5655 cut-off events. [2023-08-24 08:35:50,289 INFO L125 PetriNetUnfolderBase]: For 446932/446932 co-relation queries the response was YES. [2023-08-24 08:35:50,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76964 conditions, 5655 events. 3299/5655 cut-off events. For 446932/446932 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 37470 event pairs, 344 based on Foata normal form. 1/5626 useless extension candidates. Maximal degree in co-relation 76737. Up to 4882 conditions per place. [2023-08-24 08:35:50,382 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 977 selfloop transitions, 405 changer transitions 2/1384 dead transitions. [2023-08-24 08:35:50,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 1384 transitions, 38251 flow [2023-08-24 08:35:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:35:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:35:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1866 transitions. [2023-08-24 08:35:50,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2812782634911064 [2023-08-24 08:35:50,383 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1866 transitions. [2023-08-24 08:35:50,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1866 transitions. [2023-08-24 08:35:50,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:50,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1866 transitions. [2023-08-24 08:35:50,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 60.193548387096776) internal successors, (1866), 31 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:50,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:50,388 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:50,392 INFO L175 Difference]: Start difference. First operand has 711 places, 1291 transitions, 32644 flow. Second operand 31 states and 1866 transitions. [2023-08-24 08:35:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 1384 transitions, 38251 flow [2023-08-24 08:35:52,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 1384 transitions, 37311 flow, removed 402 selfloop flow, removed 16 redundant places. [2023-08-24 08:35:52,780 INFO L231 Difference]: Finished difference. Result has 733 places, 1349 transitions, 35414 flow [2023-08-24 08:35:52,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=31704, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=35414, PETRI_PLACES=733, PETRI_TRANSITIONS=1349} [2023-08-24 08:35:52,782 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 712 predicate places. [2023-08-24 08:35:52,782 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 1349 transitions, 35414 flow [2023-08-24 08:35:52,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 57.45945945945946) internal successors, (2126), 37 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:52,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:52,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:35:52,787 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 08:35:52,987 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,SelfDestructingSolverStorable60 [2023-08-24 08:35:52,987 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:35:52,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash 348089518, now seen corresponding path program 57 times [2023-08-24 08:35:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227590799] [2023-08-24 08:35:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:52,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:35:53,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227590799] [2023-08-24 08:35:53,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227590799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:53,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876928089] [2023-08-24 08:35:53,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:35:53,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:53,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:53,748 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 08:35:53,750 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 08:35:53,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:35:53,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:53,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 117 conjunts are in the unsatisfiable core [2023-08-24 08:35:53,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:53,965 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 13 treesize of output 9 [2023-08-24 08:35:54,002 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 08:35:54,027 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 08:35:54,285 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:54,286 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 14 [2023-08-24 08:35:54,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:35:54,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:55,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:35:55,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876928089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:55,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:55,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 11] total 38 [2023-08-24 08:35:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066966123] [2023-08-24 08:35:55,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:55,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 08:35:55,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:55,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 08:35:55,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2023-08-24 08:35:55,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:35:55,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1349 transitions, 35414 flow. Second operand has 40 states, 40 states have (on average 54.475) internal successors, (2179), 40 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:35:55,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:55,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:35:55,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:00,963 INFO L124 PetriNetUnfolderBase]: 3341/5745 cut-off events. [2023-08-24 08:36:00,963 INFO L125 PetriNetUnfolderBase]: For 468216/468216 co-relation queries the response was YES. [2023-08-24 08:36:01,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79629 conditions, 5745 events. 3341/5745 cut-off events. For 468216/468216 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 38258 event pairs, 651 based on Foata normal form. 2/5721 useless extension candidates. Maximal degree in co-relation 79394. Up to 5346 conditions per place. [2023-08-24 08:36:01,044 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1224 selfloop transitions, 189 changer transitions 7/1420 dead transitions. [2023-08-24 08:36:01,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 766 places, 1420 transitions, 40266 flow [2023-08-24 08:36:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-24 08:36:01,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-24 08:36:01,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 1924 transitions. [2023-08-24 08:36:01,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2644310060472787 [2023-08-24 08:36:01,046 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 1924 transitions. [2023-08-24 08:36:01,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 1924 transitions. [2023-08-24 08:36:01,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:01,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 1924 transitions. [2023-08-24 08:36:01,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 56.588235294117645) internal successors, (1924), 34 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:01,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:01,050 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 214.0) internal successors, (7490), 35 states have internal predecessors, (7490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:01,050 INFO L175 Difference]: Start difference. First operand has 733 places, 1349 transitions, 35414 flow. Second operand 34 states and 1924 transitions. [2023-08-24 08:36:01,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 766 places, 1420 transitions, 40266 flow [2023-08-24 08:36:03,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 748 places, 1420 transitions, 37675 flow, removed 1196 selfloop flow, removed 18 redundant places. [2023-08-24 08:36:03,775 INFO L231 Difference]: Finished difference. Result has 755 places, 1375 transitions, 34780 flow [2023-08-24 08:36:03,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=32823, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=34780, PETRI_PLACES=755, PETRI_TRANSITIONS=1375} [2023-08-24 08:36:03,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 734 predicate places. [2023-08-24 08:36:03,777 INFO L495 AbstractCegarLoop]: Abstraction has has 755 places, 1375 transitions, 34780 flow [2023-08-24 08:36:03,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 54.475) internal successors, (2179), 40 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:03,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:03,777 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:03,793 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 08:36:03,981 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,SelfDestructingSolverStorable61 [2023-08-24 08:36:03,981 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:36:03,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1898844928, now seen corresponding path program 58 times [2023-08-24 08:36:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:03,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936942649] [2023-08-24 08:36:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:03,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936942649] [2023-08-24 08:36:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936942649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531412368] [2023-08-24 08:36:04,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:36:04,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:04,738 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 08:36:04,740 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 08:36:04,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:36:04,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:04,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:36:04,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:05,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:36:05,233 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:05,233 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 30 treesize of output 33 [2023-08-24 08:36:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:05,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:05,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:05,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 08:36:06,184 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:36:06,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 08:36:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:06,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531412368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:06,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:06,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 08:36:06,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444279703] [2023-08-24 08:36:06,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:06,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:36:06,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:36:06,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1607, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 08:36:06,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:36:06,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 755 places, 1375 transitions, 34780 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:06,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:06,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:36:06,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:11,545 INFO L124 PetriNetUnfolderBase]: 3422/5887 cut-off events. [2023-08-24 08:36:11,546 INFO L125 PetriNetUnfolderBase]: For 483718/483718 co-relation queries the response was YES. [2023-08-24 08:36:11,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80580 conditions, 5887 events. 3422/5887 cut-off events. For 483718/483718 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 39461 event pairs, 491 based on Foata normal form. 2/5863 useless extension candidates. Maximal degree in co-relation 80338. Up to 5569 conditions per place. [2023-08-24 08:36:11,629 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1300 selfloop transitions, 171 changer transitions 6/1477 dead transitions. [2023-08-24 08:36:11,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 1477 transitions, 39989 flow [2023-08-24 08:36:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 08:36:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 08:36:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2566 transitions. [2023-08-24 08:36:11,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664589823468328 [2023-08-24 08:36:11,631 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2566 transitions. [2023-08-24 08:36:11,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2566 transitions. [2023-08-24 08:36:11,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:11,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2566 transitions. [2023-08-24 08:36:11,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.022222222222226) internal successors, (2566), 45 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:11,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:11,637 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 214.0) internal successors, (9844), 46 states have internal predecessors, (9844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:11,637 INFO L175 Difference]: Start difference. First operand has 755 places, 1375 transitions, 34780 flow. Second operand 45 states and 2566 transitions. [2023-08-24 08:36:11,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 1477 transitions, 39989 flow [2023-08-24 08:36:14,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 776 places, 1477 transitions, 38522 flow, removed 592 selfloop flow, removed 22 redundant places. [2023-08-24 08:36:14,123 INFO L231 Difference]: Finished difference. Result has 781 places, 1412 transitions, 35437 flow [2023-08-24 08:36:14,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=33342, PETRI_DIFFERENCE_MINUEND_PLACES=732, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=35437, PETRI_PLACES=781, PETRI_TRANSITIONS=1412} [2023-08-24 08:36:14,124 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 760 predicate places. [2023-08-24 08:36:14,124 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 1412 transitions, 35437 flow [2023-08-24 08:36:14,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:14,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:14,125 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:14,131 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 08:36:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:14,330 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:36:14,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2096307402, now seen corresponding path program 59 times [2023-08-24 08:36:14,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225998311] [2023-08-24 08:36:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:15,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:15,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225998311] [2023-08-24 08:36:15,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225998311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:15,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149803226] [2023-08-24 08:36:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:36:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:15,017 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 08:36:15,019 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 08:36:15,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:36:15,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:15,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:36:15,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:36:15,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:15,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:15,553 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:36:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:36:15,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149803226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:15,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:15,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-24 08:36:15,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181177334] [2023-08-24 08:36:15,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:36:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:15,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:36:15,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:36:15,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:36:15,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 1412 transitions, 35437 flow. Second operand has 33 states, 33 states have (on average 54.666666666666664) internal successors, (1804), 33 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:15,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:15,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:36:15,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:20,081 INFO L124 PetriNetUnfolderBase]: 3538/6070 cut-off events. [2023-08-24 08:36:20,081 INFO L125 PetriNetUnfolderBase]: For 558104/558104 co-relation queries the response was YES. [2023-08-24 08:36:20,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85839 conditions, 6070 events. 3538/6070 cut-off events. For 558104/558104 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 40637 event pairs, 557 based on Foata normal form. 3/6047 useless extension candidates. Maximal degree in co-relation 85593. Up to 5653 conditions per place. [2023-08-24 08:36:20,198 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1277 selfloop transitions, 224 changer transitions 5/1506 dead transitions. [2023-08-24 08:36:20,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 1506 transitions, 42780 flow [2023-08-24 08:36:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 08:36:20,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 08:36:20,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1999 transitions. [2023-08-24 08:36:20,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26688918558077435 [2023-08-24 08:36:20,200 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 1999 transitions. [2023-08-24 08:36:20,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 1999 transitions. [2023-08-24 08:36:20,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:20,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 1999 transitions. [2023-08-24 08:36:20,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 57.114285714285714) internal successors, (1999), 35 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:20,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 214.0) internal successors, (7704), 36 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:20,205 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 214.0) internal successors, (7704), 36 states have internal predecessors, (7704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:20,205 INFO L175 Difference]: Start difference. First operand has 781 places, 1412 transitions, 35437 flow. Second operand 35 states and 1999 transitions. [2023-08-24 08:36:20,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 1506 transitions, 42780 flow [2023-08-24 08:36:23,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 798 places, 1506 transitions, 41951 flow, removed 368 selfloop flow, removed 17 redundant places. [2023-08-24 08:36:23,565 INFO L231 Difference]: Finished difference. Result has 809 places, 1460 transitions, 39030 flow [2023-08-24 08:36:23,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=34698, PETRI_DIFFERENCE_MINUEND_PLACES=764, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=39030, PETRI_PLACES=809, PETRI_TRANSITIONS=1460} [2023-08-24 08:36:23,567 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 788 predicate places. [2023-08-24 08:36:23,568 INFO L495 AbstractCegarLoop]: Abstraction has has 809 places, 1460 transitions, 39030 flow [2023-08-24 08:36:23,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.666666666666664) internal successors, (1804), 33 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:23,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:23,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:23,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-08-24 08:36:23,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:23,773 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:36:23,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash -2146212418, now seen corresponding path program 60 times [2023-08-24 08:36:23,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569413060] [2023-08-24 08:36:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569413060] [2023-08-24 08:36:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569413060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730053440] [2023-08-24 08:36:24,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:36:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:24,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:24,346 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 08:36:24,348 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 08:36:24,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:36:24,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:24,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:36:24,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:24,919 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:24,919 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 31 treesize of output 19 [2023-08-24 08:36:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:24,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:25,353 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:25,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-08-24 08:36:25,728 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:36:25,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 65 [2023-08-24 08:36:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:26,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730053440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:26,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:26,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-08-24 08:36:26,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075090117] [2023-08-24 08:36:26,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:26,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 08:36:26,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:26,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 08:36:26,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1273, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 08:36:26,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:36:26,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 809 places, 1460 transitions, 39030 flow. Second operand has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:26,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:26,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:36:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:30,583 INFO L124 PetriNetUnfolderBase]: 3573/6135 cut-off events. [2023-08-24 08:36:30,584 INFO L125 PetriNetUnfolderBase]: For 630665/630665 co-relation queries the response was YES. [2023-08-24 08:36:30,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89033 conditions, 6135 events. 3573/6135 cut-off events. For 630665/630665 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 41282 event pairs, 651 based on Foata normal form. 2/6111 useless extension candidates. Maximal degree in co-relation 88776. Up to 5832 conditions per place. [2023-08-24 08:36:30,688 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1351 selfloop transitions, 171 changer transitions 6/1528 dead transitions. [2023-08-24 08:36:30,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 844 places, 1528 transitions, 44065 flow [2023-08-24 08:36:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 08:36:30,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 08:36:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2293 transitions. [2023-08-24 08:36:30,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2976375908618899 [2023-08-24 08:36:30,691 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2293 transitions. [2023-08-24 08:36:30,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2293 transitions. [2023-08-24 08:36:30,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:30,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2293 transitions. [2023-08-24 08:36:30,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 63.69444444444444) internal successors, (2293), 36 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:30,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:30,696 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:30,696 INFO L175 Difference]: Start difference. First operand has 809 places, 1460 transitions, 39030 flow. Second operand 36 states and 2293 transitions. [2023-08-24 08:36:30,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 844 places, 1528 transitions, 44065 flow [2023-08-24 08:36:34,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 824 places, 1528 transitions, 40288 flow, removed 1773 selfloop flow, removed 20 redundant places. [2023-08-24 08:36:34,856 INFO L231 Difference]: Finished difference. Result has 828 places, 1484 transitions, 37290 flow [2023-08-24 08:36:34,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=35527, PETRI_DIFFERENCE_MINUEND_PLACES=789, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=37290, PETRI_PLACES=828, PETRI_TRANSITIONS=1484} [2023-08-24 08:36:34,857 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 807 predicate places. [2023-08-24 08:36:34,857 INFO L495 AbstractCegarLoop]: Abstraction has has 828 places, 1484 transitions, 37290 flow [2023-08-24 08:36:34,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:34,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:34,858 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:34,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-08-24 08:36:35,062 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,SelfDestructingSolverStorable64 [2023-08-24 08:36:35,063 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:36:35,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1011058486, now seen corresponding path program 61 times [2023-08-24 08:36:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:35,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934595911] [2023-08-24 08:36:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:35,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:35,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:35,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:35,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934595911] [2023-08-24 08:36:35,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934595911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:35,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864866179] [2023-08-24 08:36:35,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:36:35,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:35,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:35,534 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 08:36:35,536 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 08:36:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:35,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 08:36:35,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:36:35,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:35,994 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:35,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:36:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:36:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864866179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:36,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:36,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 22 [2023-08-24 08:36:36,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182002163] [2023-08-24 08:36:36,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:36,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:36:36,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:36,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:36:36,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:36:36,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 214 [2023-08-24 08:36:36,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 828 places, 1484 transitions, 37290 flow. Second operand has 24 states, 24 states have (on average 68.83333333333333) internal successors, (1652), 24 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:36,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:36,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 214 [2023-08-24 08:36:36,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:39,549 INFO L124 PetriNetUnfolderBase]: 3606/6188 cut-off events. [2023-08-24 08:36:39,550 INFO L125 PetriNetUnfolderBase]: For 620439/620439 co-relation queries the response was YES. [2023-08-24 08:36:39,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87078 conditions, 6188 events. 3606/6188 cut-off events. For 620439/620439 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 41665 event pairs, 517 based on Foata normal form. 1/6159 useless extension candidates. Maximal degree in co-relation 86819. Up to 6007 conditions per place. [2023-08-24 08:36:39,660 INFO L140 encePairwiseOnDemand]: 207/214 looper letters, 1428 selfloop transitions, 84 changer transitions 1/1513 dead transitions. [2023-08-24 08:36:39,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 1513 transitions, 41489 flow [2023-08-24 08:36:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 08:36:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 08:36:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1140 transitions. [2023-08-24 08:36:39,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33294392523364486 [2023-08-24 08:36:39,661 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1140 transitions. [2023-08-24 08:36:39,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1140 transitions. [2023-08-24 08:36:39,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:39,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1140 transitions. [2023-08-24 08:36:39,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 71.25) internal successors, (1140), 16 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:39,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 214.0) internal successors, (3638), 17 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:39,664 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 214.0) internal successors, (3638), 17 states have internal predecessors, (3638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:39,664 INFO L175 Difference]: Start difference. First operand has 828 places, 1484 transitions, 37290 flow. Second operand 16 states and 1140 transitions. [2023-08-24 08:36:39,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 1513 transitions, 41489 flow [2023-08-24 08:36:43,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 1513 transitions, 40738 flow, removed 330 selfloop flow, removed 23 redundant places. [2023-08-24 08:36:43,628 INFO L231 Difference]: Finished difference. Result has 824 places, 1492 transitions, 37429 flow [2023-08-24 08:36:43,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=36539, PETRI_DIFFERENCE_MINUEND_PLACES=805, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=37429, PETRI_PLACES=824, PETRI_TRANSITIONS=1492} [2023-08-24 08:36:43,629 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 803 predicate places. [2023-08-24 08:36:43,629 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 1492 transitions, 37429 flow [2023-08-24 08:36:43,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.83333333333333) internal successors, (1652), 24 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:43,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:43,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:43,636 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 08:36:43,834 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,SelfDestructingSolverStorable65 [2023-08-24 08:36:43,834 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:36:43,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1376151094, now seen corresponding path program 62 times [2023-08-24 08:36:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:43,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600528630] [2023-08-24 08:36:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:43,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:44,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600528630] [2023-08-24 08:36:44,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600528630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:44,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522002444] [2023-08-24 08:36:44,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:36:44,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:44,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:44,381 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 08:36:44,382 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 08:36:44,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:36:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:44,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-08-24 08:36:44,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:44,759 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:44,760 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 15 treesize of output 14 [2023-08-24 08:36:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:44,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:45,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:45,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 114 [2023-08-24 08:36:45,483 INFO L322 Elim1Store]: treesize reduction 90, result has 12.6 percent of original size [2023-08-24 08:36:45,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 23 [2023-08-24 08:36:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:45,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522002444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:45,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:45,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2023-08-24 08:36:45,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645443653] [2023-08-24 08:36:45,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:45,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 08:36:45,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:45,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 08:36:45,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 08:36:45,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:36:45,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 1492 transitions, 37429 flow. Second operand has 34 states, 34 states have (on average 61.588235294117645) internal successors, (2094), 34 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:45,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:45,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:36:45,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:36:51,581 INFO L124 PetriNetUnfolderBase]: 3756/6456 cut-off events. [2023-08-24 08:36:51,581 INFO L125 PetriNetUnfolderBase]: For 666660/666660 co-relation queries the response was YES. [2023-08-24 08:36:51,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92073 conditions, 6456 events. 3756/6456 cut-off events. For 666660/666660 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44008 event pairs, 566 based on Foata normal form. 2/6428 useless extension candidates. Maximal degree in co-relation 91810. Up to 5590 conditions per place. [2023-08-24 08:36:51,695 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1268 selfloop transitions, 337 changer transitions 9/1614 dead transitions. [2023-08-24 08:36:51,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 865 places, 1614 transitions, 44290 flow [2023-08-24 08:36:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 08:36:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 08:36:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2687 transitions. [2023-08-24 08:36:51,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2989541611036938 [2023-08-24 08:36:51,698 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2687 transitions. [2023-08-24 08:36:51,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2687 transitions. [2023-08-24 08:36:51,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:36:51,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2687 transitions. [2023-08-24 08:36:51,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 63.976190476190474) internal successors, (2687), 42 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:51,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 214.0) internal successors, (9202), 43 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:51,703 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 214.0) internal successors, (9202), 43 states have internal predecessors, (9202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:51,703 INFO L175 Difference]: Start difference. First operand has 824 places, 1492 transitions, 37429 flow. Second operand 42 states and 2687 transitions. [2023-08-24 08:36:51,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 865 places, 1614 transitions, 44290 flow [2023-08-24 08:36:55,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 855 places, 1614 transitions, 43710 flow, removed 238 selfloop flow, removed 10 redundant places. [2023-08-24 08:36:55,892 INFO L231 Difference]: Finished difference. Result has 866 places, 1541 transitions, 40582 flow [2023-08-24 08:36:55,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=36849, PETRI_DIFFERENCE_MINUEND_PLACES=814, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=40582, PETRI_PLACES=866, PETRI_TRANSITIONS=1541} [2023-08-24 08:36:55,892 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 845 predicate places. [2023-08-24 08:36:55,893 INFO L495 AbstractCegarLoop]: Abstraction has has 866 places, 1541 transitions, 40582 flow [2023-08-24 08:36:55,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 61.588235294117645) internal successors, (2094), 34 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:55,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:55,893 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:36:55,899 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 08:36:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:56,098 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:36:56,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:56,098 INFO L85 PathProgramCache]: Analyzing trace with hash 115778614, now seen corresponding path program 63 times [2023-08-24 08:36:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:56,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541497808] [2023-08-24 08:36:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:56,905 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:56,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:56,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541497808] [2023-08-24 08:36:56,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541497808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:56,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428076259] [2023-08-24 08:36:56,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:36:56,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:56,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:56,907 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 08:36:56,910 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 08:36:57,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:36:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:57,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-08-24 08:36:57,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:57,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:36:57,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:36:57,539 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:57,539 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 32 treesize of output 33 [2023-08-24 08:36:57,589 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:57,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:58,198 INFO L322 Elim1Store]: treesize reduction 40, result has 65.8 percent of original size [2023-08-24 08:36:58,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 88 [2023-08-24 08:36:58,342 INFO L322 Elim1Store]: treesize reduction 66, result has 43.6 percent of original size [2023-08-24 08:36:58,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 61 [2023-08-24 08:36:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:36:58,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428076259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:58,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:58,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 08:36:58,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859799973] [2023-08-24 08:36:58,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 08:36:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 08:36:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2023-08-24 08:36:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:36:58,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 866 places, 1541 transitions, 40582 flow. Second operand has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:36:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:36:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:37:06,034 INFO L124 PetriNetUnfolderBase]: 3857/6647 cut-off events. [2023-08-24 08:37:06,034 INFO L125 PetriNetUnfolderBase]: For 746731/746731 co-relation queries the response was YES. [2023-08-24 08:37:06,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97097 conditions, 6647 events. 3857/6647 cut-off events. For 746731/746731 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 45720 event pairs, 525 based on Foata normal form. 2/6619 useless extension candidates. Maximal degree in co-relation 96822. Up to 6156 conditions per place. [2023-08-24 08:37:06,162 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1399 selfloop transitions, 254 changer transitions 8/1661 dead transitions. [2023-08-24 08:37:06,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 1661 transitions, 46348 flow [2023-08-24 08:37:06,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 08:37:06,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 08:37:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3014 transitions. [2023-08-24 08:37:06,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26573796508552283 [2023-08-24 08:37:06,165 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3014 transitions. [2023-08-24 08:37:06,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3014 transitions. [2023-08-24 08:37:06,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:37:06,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3014 transitions. [2023-08-24 08:37:06,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 56.867924528301884) internal successors, (3014), 53 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:06,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 214.0) internal successors, (11556), 54 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:06,172 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 214.0) internal successors, (11556), 54 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:06,173 INFO L175 Difference]: Start difference. First operand has 866 places, 1541 transitions, 40582 flow. Second operand 53 states and 3014 transitions. [2023-08-24 08:37:06,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 1661 transitions, 46348 flow [2023-08-24 08:37:11,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 890 places, 1661 transitions, 44483 flow, removed 818 selfloop flow, removed 27 redundant places. [2023-08-24 08:37:11,708 INFO L231 Difference]: Finished difference. Result has 900 places, 1586 transitions, 41479 flow [2023-08-24 08:37:11,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=38831, PETRI_DIFFERENCE_MINUEND_PLACES=838, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=41479, PETRI_PLACES=900, PETRI_TRANSITIONS=1586} [2023-08-24 08:37:11,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 879 predicate places. [2023-08-24 08:37:11,709 INFO L495 AbstractCegarLoop]: Abstraction has has 900 places, 1586 transitions, 41479 flow [2023-08-24 08:37:11,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.44444444444444) internal successors, (2450), 45 states have internal predecessors, (2450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:11,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:37:11,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:37:11,714 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 08:37:11,914 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,SelfDestructingSolverStorable67 [2023-08-24 08:37:11,914 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:37:11,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:37:11,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1287745300, now seen corresponding path program 64 times [2023-08-24 08:37:11,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:37:11,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092246548] [2023-08-24 08:37:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:37:11,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:37:11,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:37:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:12,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:37:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092246548] [2023-08-24 08:37:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092246548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:37:12,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009123795] [2023-08-24 08:37:12,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:37:12,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:37:12,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:37:12,560 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 08:37:12,562 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 08:37:12,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:37:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:37:12,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:37:12,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:37:13,076 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:37:13,076 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 15 treesize of output 14 [2023-08-24 08:37:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:13,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:37:13,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:37:13,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 08:37:14,043 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:37:14,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 08:37:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:14,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009123795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:37:14,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:37:14,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 08:37:14,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30821216] [2023-08-24 08:37:14,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:37:14,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 08:37:14,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:37:14,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 08:37:14,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1510, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 08:37:14,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:37:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 900 places, 1586 transitions, 41479 flow. Second operand has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:37:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:37:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:37:19,790 INFO L124 PetriNetUnfolderBase]: 3951/6808 cut-off events. [2023-08-24 08:37:19,790 INFO L125 PetriNetUnfolderBase]: For 791271/791271 co-relation queries the response was YES. [2023-08-24 08:37:19,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100212 conditions, 6808 events. 3951/6808 cut-off events. For 791271/791271 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 47037 event pairs, 466 based on Foata normal form. 2/6780 useless extension candidates. Maximal degree in co-relation 99928. Up to 6093 conditions per place. [2023-08-24 08:37:19,923 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1423 selfloop transitions, 273 changer transitions 4/1700 dead transitions. [2023-08-24 08:37:19,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 938 places, 1700 transitions, 48575 flow [2023-08-24 08:37:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 08:37:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 08:37:19,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2278 transitions. [2023-08-24 08:37:19,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26612149532710283 [2023-08-24 08:37:19,941 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2278 transitions. [2023-08-24 08:37:19,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2278 transitions. [2023-08-24 08:37:19,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:37:19,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2278 transitions. [2023-08-24 08:37:19,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 56.95) internal successors, (2278), 40 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:19,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:19,946 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:19,946 INFO L175 Difference]: Start difference. First operand has 900 places, 1586 transitions, 41479 flow. Second operand 40 states and 2278 transitions. [2023-08-24 08:37:19,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 938 places, 1700 transitions, 48575 flow [2023-08-24 08:37:26,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 901 places, 1700 transitions, 47547 flow, removed 435 selfloop flow, removed 37 redundant places. [2023-08-24 08:37:26,035 INFO L231 Difference]: Finished difference. Result has 906 places, 1624 transitions, 43362 flow [2023-08-24 08:37:26,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=40459, PETRI_DIFFERENCE_MINUEND_PLACES=862, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=43362, PETRI_PLACES=906, PETRI_TRANSITIONS=1624} [2023-08-24 08:37:26,036 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 885 predicate places. [2023-08-24 08:37:26,036 INFO L495 AbstractCegarLoop]: Abstraction has has 906 places, 1624 transitions, 43362 flow [2023-08-24 08:37:26,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.38095238095238) internal successors, (2284), 42 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:26,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:37:26,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:37:26,041 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 08:37:26,237 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,SelfDestructingSolverStorable68 [2023-08-24 08:37:26,237 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:37:26,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:37:26,237 INFO L85 PathProgramCache]: Analyzing trace with hash -39428298, now seen corresponding path program 65 times [2023-08-24 08:37:26,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:37:26,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81476473] [2023-08-24 08:37:26,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:37:26,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:37:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:37:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:27,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:37:27,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81476473] [2023-08-24 08:37:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81476473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:37:27,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859469279] [2023-08-24 08:37:27,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:37:27,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:37:27,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:37:27,125 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 08:37:27,127 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 08:37:27,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 08:37:27,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:37:27,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:37:27,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:37:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:37:27,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:37:27,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:37:27,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:37:27,827 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:37:27,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:37:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:37:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859469279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:37:27,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:37:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 31 [2023-08-24 08:37:27,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726685518] [2023-08-24 08:37:27,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:37:27,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:37:27,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:37:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:37:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:37:27,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:37:27,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 906 places, 1624 transitions, 43362 flow. Second operand has 33 states, 33 states have (on average 54.666666666666664) internal successors, (1804), 33 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:27,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:37:27,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:37:27,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:37:33,268 INFO L124 PetriNetUnfolderBase]: 4074/7002 cut-off events. [2023-08-24 08:37:33,268 INFO L125 PetriNetUnfolderBase]: For 883047/883047 co-relation queries the response was YES. [2023-08-24 08:37:33,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107479 conditions, 7002 events. 4074/7002 cut-off events. For 883047/883047 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 48405 event pairs, 625 based on Foata normal form. 3/6975 useless extension candidates. Maximal degree in co-relation 107190. Up to 6572 conditions per place. [2023-08-24 08:37:33,385 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1505 selfloop transitions, 211 changer transitions 3/1719 dead transitions. [2023-08-24 08:37:33,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 936 places, 1719 transitions, 51884 flow [2023-08-24 08:37:33,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:37:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:37:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1784 transitions. [2023-08-24 08:37:33,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2689176967138981 [2023-08-24 08:37:33,387 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1784 transitions. [2023-08-24 08:37:33,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1784 transitions. [2023-08-24 08:37:33,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:37:33,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1784 transitions. [2023-08-24 08:37:33,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 57.54838709677419) internal successors, (1784), 31 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:33,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:33,391 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 214.0) internal successors, (6848), 32 states have internal predecessors, (6848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:33,391 INFO L175 Difference]: Start difference. First operand has 906 places, 1624 transitions, 43362 flow. Second operand 31 states and 1784 transitions. [2023-08-24 08:37:33,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 936 places, 1719 transitions, 51884 flow [2023-08-24 08:37:39,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 912 places, 1719 transitions, 50994 flow, removed 398 selfloop flow, removed 24 redundant places. [2023-08-24 08:37:39,564 INFO L231 Difference]: Finished difference. Result has 921 places, 1673 transitions, 47462 flow [2023-08-24 08:37:39,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=42472, PETRI_DIFFERENCE_MINUEND_PLACES=882, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=47462, PETRI_PLACES=921, PETRI_TRANSITIONS=1673} [2023-08-24 08:37:39,565 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 900 predicate places. [2023-08-24 08:37:39,565 INFO L495 AbstractCegarLoop]: Abstraction has has 921 places, 1673 transitions, 47462 flow [2023-08-24 08:37:39,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 54.666666666666664) internal successors, (1804), 33 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:39,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:37:39,566 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:37:39,572 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 08:37:39,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-24 08:37:39,771 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:37:39,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:37:39,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2112812714, now seen corresponding path program 66 times [2023-08-24 08:37:39,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:37:39,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044730882] [2023-08-24 08:37:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:37:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:37:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:37:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:40,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:37:40,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044730882] [2023-08-24 08:37:40,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044730882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:37:40,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887201987] [2023-08-24 08:37:40,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:37:40,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:37:40,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:37:40,339 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 08:37:40,341 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 08:37:40,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:37:40,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:37:40,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:37:40,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:37:40,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:37:40,868 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:37:40,868 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 61 treesize of output 41 [2023-08-24 08:37:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:40,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:37:41,463 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:37:41,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 113 [2023-08-24 08:37:42,114 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:37:42,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 66 [2023-08-24 08:37:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:42,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887201987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:37:42,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:37:42,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 37 [2023-08-24 08:37:42,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135011810] [2023-08-24 08:37:42,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:37:42,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 08:37:42,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:37:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 08:37:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1327, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 08:37:42,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:37:42,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 921 places, 1673 transitions, 47462 flow. Second operand has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:42,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:37:42,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:37:42,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:37:48,751 INFO L124 PetriNetUnfolderBase]: 4205/7233 cut-off events. [2023-08-24 08:37:48,751 INFO L125 PetriNetUnfolderBase]: For 995516/995516 co-relation queries the response was YES. [2023-08-24 08:37:48,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114037 conditions, 7233 events. 4205/7233 cut-off events. For 995516/995516 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 50260 event pairs, 432 based on Foata normal form. 2/7205 useless extension candidates. Maximal degree in co-relation 113739. Up to 6808 conditions per place. [2023-08-24 08:37:48,894 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1579 selfloop transitions, 214 changer transitions 6/1799 dead transitions. [2023-08-24 08:37:48,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 1799 transitions, 55419 flow [2023-08-24 08:37:48,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 08:37:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 08:37:48,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2811 transitions. [2023-08-24 08:37:48,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2985344095157179 [2023-08-24 08:37:48,897 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2811 transitions. [2023-08-24 08:37:48,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2811 transitions. [2023-08-24 08:37:48,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:37:48,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2811 transitions. [2023-08-24 08:37:48,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 63.88636363636363) internal successors, (2811), 44 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:48,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:48,904 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:48,904 INFO L175 Difference]: Start difference. First operand has 921 places, 1673 transitions, 47462 flow. Second operand 44 states and 2811 transitions. [2023-08-24 08:37:48,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 1799 transitions, 55419 flow [2023-08-24 08:37:55,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 950 places, 1799 transitions, 51817 flow, removed 1753 selfloop flow, removed 14 redundant places. [2023-08-24 08:37:55,607 INFO L231 Difference]: Finished difference. Result has 959 places, 1736 transitions, 47671 flow [2023-08-24 08:37:55,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=43865, PETRI_DIFFERENCE_MINUEND_PLACES=907, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=47671, PETRI_PLACES=959, PETRI_TRANSITIONS=1736} [2023-08-24 08:37:55,609 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 938 predicate places. [2023-08-24 08:37:55,609 INFO L495 AbstractCegarLoop]: Abstraction has has 959 places, 1736 transitions, 47671 flow [2023-08-24 08:37:55,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 61.48717948717949) internal successors, (2398), 39 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:55,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:37:55,610 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:37:55,617 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 08:37:55,815 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,SelfDestructingSolverStorable70 [2023-08-24 08:37:55,815 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:37:55,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:37:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash 117367606, now seen corresponding path program 67 times [2023-08-24 08:37:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:37:55,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759428935] [2023-08-24 08:37:55,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:37:55,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:37:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:37:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:37:56,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:37:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759428935] [2023-08-24 08:37:56,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759428935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:37:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415782979] [2023-08-24 08:37:56,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:37:56,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:37:56,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:37:56,611 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 08:37:56,613 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 08:37:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:37:56,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:37:56,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:37:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:37:57,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:37:57,186 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:37:57,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:37:57,269 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:37:57,270 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:37:57,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:37:57,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415782979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:37:57,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:37:57,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 8] total 29 [2023-08-24 08:37:57,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146132084] [2023-08-24 08:37:57,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:37:57,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 08:37:57,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:37:57,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 08:37:57,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2023-08-24 08:37:57,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:37:57,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 959 places, 1736 transitions, 47671 flow. Second operand has 31 states, 31 states have (on average 54.74193548387097) internal successors, (1697), 31 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:37:57,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:37:57,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:37:57,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:38:02,956 INFO L124 PetriNetUnfolderBase]: 4285/7371 cut-off events. [2023-08-24 08:38:02,956 INFO L125 PetriNetUnfolderBase]: For 1019066/1019066 co-relation queries the response was YES. [2023-08-24 08:38:03,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114993 conditions, 7371 events. 4285/7371 cut-off events. For 1019066/1019066 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 51401 event pairs, 615 based on Foata normal form. 2/7339 useless extension candidates. Maximal degree in co-relation 114686. Up to 7074 conditions per place. [2023-08-24 08:38:03,101 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1669 selfloop transitions, 122 changer transitions 2/1793 dead transitions. [2023-08-24 08:38:03,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 981 places, 1793 transitions, 53964 flow [2023-08-24 08:38:03,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 08:38:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 08:38:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1314 transitions. [2023-08-24 08:38:03,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2669646485168631 [2023-08-24 08:38:03,103 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1314 transitions. [2023-08-24 08:38:03,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1314 transitions. [2023-08-24 08:38:03,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:38:03,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1314 transitions. [2023-08-24 08:38:03,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 57.130434782608695) internal successors, (1314), 23 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:03,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 214.0) internal successors, (5136), 24 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:03,107 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 214.0) internal successors, (5136), 24 states have internal predecessors, (5136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:03,107 INFO L175 Difference]: Start difference. First operand has 959 places, 1736 transitions, 47671 flow. Second operand 23 states and 1314 transitions. [2023-08-24 08:38:03,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 981 places, 1793 transitions, 53964 flow [2023-08-24 08:38:10,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 966 places, 1793 transitions, 52520 flow, removed 684 selfloop flow, removed 15 redundant places. [2023-08-24 08:38:10,896 INFO L231 Difference]: Finished difference. Result has 973 places, 1759 transitions, 48378 flow [2023-08-24 08:38:10,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=46227, PETRI_DIFFERENCE_MINUEND_PLACES=944, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=48378, PETRI_PLACES=973, PETRI_TRANSITIONS=1759} [2023-08-24 08:38:10,898 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 952 predicate places. [2023-08-24 08:38:10,898 INFO L495 AbstractCegarLoop]: Abstraction has has 973 places, 1759 transitions, 48378 flow [2023-08-24 08:38:10,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 54.74193548387097) internal successors, (1697), 31 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:10,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:38:10,898 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:38:10,903 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 08:38:11,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:38:11,103 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:38:11,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:38:11,104 INFO L85 PathProgramCache]: Analyzing trace with hash 430692212, now seen corresponding path program 68 times [2023-08-24 08:38:11,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:38:11,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007897088] [2023-08-24 08:38:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:38:11,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:38:11,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:38:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:11,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:38:11,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007897088] [2023-08-24 08:38:11,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007897088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:38:11,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649603534] [2023-08-24 08:38:11,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:38:11,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:38:11,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:38:11,672 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 08:38:11,674 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 08:38:11,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:38:11,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:38:11,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:38:11,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:38:12,253 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:38:12,253 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 31 treesize of output 19 [2023-08-24 08:38:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:12,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:38:12,683 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:38:12,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 08:38:13,171 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:38:13,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 08:38:13,518 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:13,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649603534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:38:13,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:38:13,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2023-08-24 08:38:13,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356306981] [2023-08-24 08:38:13,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:38:13,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 08:38:13,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:38:13,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 08:38:13,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 08:38:13,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:38:13,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 973 places, 1759 transitions, 48378 flow. Second operand has 38 states, 38 states have (on average 61.44736842105263) internal successors, (2335), 38 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:13,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:38:13,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:38:13,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:38:19,823 INFO L124 PetriNetUnfolderBase]: 4347/7487 cut-off events. [2023-08-24 08:38:19,823 INFO L125 PetriNetUnfolderBase]: For 1040577/1040577 co-relation queries the response was YES. [2023-08-24 08:38:19,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116884 conditions, 7487 events. 4347/7487 cut-off events. For 1040577/1040577 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 52527 event pairs, 489 based on Foata normal form. 2/7455 useless extension candidates. Maximal degree in co-relation 116571. Up to 6957 conditions per place. [2023-08-24 08:38:20,068 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 1577 selfloop transitions, 252 changer transitions 4/1833 dead transitions. [2023-08-24 08:38:20,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1008 places, 1833 transitions, 54340 flow [2023-08-24 08:38:20,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 08:38:20,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 08:38:20,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2307 transitions. [2023-08-24 08:38:20,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29945482866043616 [2023-08-24 08:38:20,070 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2307 transitions. [2023-08-24 08:38:20,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2307 transitions. [2023-08-24 08:38:20,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:38:20,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2307 transitions. [2023-08-24 08:38:20,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 64.08333333333333) internal successors, (2307), 36 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:20,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:20,076 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 214.0) internal successors, (7918), 37 states have internal predecessors, (7918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:20,076 INFO L175 Difference]: Start difference. First operand has 973 places, 1759 transitions, 48378 flow. Second operand 36 states and 2307 transitions. [2023-08-24 08:38:20,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1008 places, 1833 transitions, 54340 flow [2023-08-24 08:38:27,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 998 places, 1833 transitions, 53008 flow, removed 627 selfloop flow, removed 10 redundant places. [2023-08-24 08:38:27,531 INFO L231 Difference]: Finished difference. Result has 1004 places, 1781 transitions, 49396 flow [2023-08-24 08:38:27,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=47046, PETRI_DIFFERENCE_MINUEND_PLACES=963, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=49396, PETRI_PLACES=1004, PETRI_TRANSITIONS=1781} [2023-08-24 08:38:27,532 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 983 predicate places. [2023-08-24 08:38:27,532 INFO L495 AbstractCegarLoop]: Abstraction has has 1004 places, 1781 transitions, 49396 flow [2023-08-24 08:38:27,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 61.44736842105263) internal successors, (2335), 38 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:27,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:38:27,533 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:38:27,538 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 08:38:27,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:38:27,738 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:38:27,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:38:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash -11188290, now seen corresponding path program 69 times [2023-08-24 08:38:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:38:27,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122775816] [2023-08-24 08:38:27,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:38:27,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:38:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:38:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:28,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:38:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122775816] [2023-08-24 08:38:28,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122775816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:38:28,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607774947] [2023-08-24 08:38:28,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:38:28,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:38:28,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:38:28,326 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:38:28,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-24 08:38:28,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:38:28,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:38:28,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 112 conjunts are in the unsatisfiable core [2023-08-24 08:38:28,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:38:28,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:38:28,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:38:28,941 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:38:28,941 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 32 treesize of output 33 [2023-08-24 08:38:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:28,999 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:38:29,716 INFO L322 Elim1Store]: treesize reduction 42, result has 64.1 percent of original size [2023-08-24 08:38:29,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 85 [2023-08-24 08:38:29,850 INFO L322 Elim1Store]: treesize reduction 66, result has 43.6 percent of original size [2023-08-24 08:38:29,850 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 62 [2023-08-24 08:38:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:30,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607774947] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:38:30,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:38:30,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-08-24 08:38:30,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150332254] [2023-08-24 08:38:30,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:38:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 08:38:30,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:38:30,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 08:38:30,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2023-08-24 08:38:30,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:38:30,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1004 places, 1781 transitions, 49396 flow. Second operand has 44 states, 44 states have (on average 61.38636363636363) internal successors, (2701), 44 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:30,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:38:30,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:38:30,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:38:38,212 INFO L124 PetriNetUnfolderBase]: 4389/7569 cut-off events. [2023-08-24 08:38:38,212 INFO L125 PetriNetUnfolderBase]: For 1075486/1075486 co-relation queries the response was YES. [2023-08-24 08:38:38,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118704 conditions, 7569 events. 4389/7569 cut-off events. For 1075486/1075486 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 53285 event pairs, 492 based on Foata normal form. 2/7537 useless extension candidates. Maximal degree in co-relation 118384. Up to 7158 conditions per place. [2023-08-24 08:38:38,345 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1627 selfloop transitions, 239 changer transitions 10/1876 dead transitions. [2023-08-24 08:38:38,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1058 places, 1876 transitions, 56131 flow [2023-08-24 08:38:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-24 08:38:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-24 08:38:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3500 transitions. [2023-08-24 08:38:38,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2973661852166525 [2023-08-24 08:38:38,348 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3500 transitions. [2023-08-24 08:38:38,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3500 transitions. [2023-08-24 08:38:38,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:38:38,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3500 transitions. [2023-08-24 08:38:38,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 63.63636363636363) internal successors, (3500), 55 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:38,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 214.0) internal successors, (11984), 56 states have internal predecessors, (11984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:38,355 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 214.0) internal successors, (11984), 56 states have internal predecessors, (11984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:38,355 INFO L175 Difference]: Start difference. First operand has 1004 places, 1781 transitions, 49396 flow. Second operand 55 states and 3500 transitions. [2023-08-24 08:38:38,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1058 places, 1876 transitions, 56131 flow [2023-08-24 08:38:46,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1033 places, 1876 transitions, 55506 flow, removed 257 selfloop flow, removed 25 redundant places. [2023-08-24 08:38:46,170 INFO L231 Difference]: Finished difference. Result has 1038 places, 1808 transitions, 51750 flow [2023-08-24 08:38:46,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=48771, PETRI_DIFFERENCE_MINUEND_PLACES=979, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=51750, PETRI_PLACES=1038, PETRI_TRANSITIONS=1808} [2023-08-24 08:38:46,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1017 predicate places. [2023-08-24 08:38:46,179 INFO L495 AbstractCegarLoop]: Abstraction has has 1038 places, 1808 transitions, 51750 flow [2023-08-24 08:38:46,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.38636363636363) internal successors, (2701), 44 states have internal predecessors, (2701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:46,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:38:46,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:38:46,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-24 08:38:46,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:38:46,385 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:38:46,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:38:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 521698676, now seen corresponding path program 70 times [2023-08-24 08:38:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:38:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736778843] [2023-08-24 08:38:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:38:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:38:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:38:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:47,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:38:47,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736778843] [2023-08-24 08:38:47,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736778843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:38:47,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026443512] [2023-08-24 08:38:47,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:38:47,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:38:47,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:38:47,152 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:38:47,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-24 08:38:47,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:38:47,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:38:47,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:38:47,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:38:47,679 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:38:47,679 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 15 treesize of output 14 [2023-08-24 08:38:47,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:47,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:38:48,281 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:38:48,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-08-24 08:38:48,649 INFO L322 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-24 08:38:48,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 60 [2023-08-24 08:38:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:38:48,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026443512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:38:48,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:38:48,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 08:38:48,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861159432] [2023-08-24 08:38:48,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:38:48,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:38:48,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:38:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:38:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 08:38:48,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:38:48,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1038 places, 1808 transitions, 51750 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:48,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:38:48,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:38:48,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:38:57,161 INFO L124 PetriNetUnfolderBase]: 4504/7762 cut-off events. [2023-08-24 08:38:57,161 INFO L125 PetriNetUnfolderBase]: For 1172606/1172606 co-relation queries the response was YES. [2023-08-24 08:38:57,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125568 conditions, 7762 events. 4504/7762 cut-off events. For 1172606/1172606 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 54757 event pairs, 455 based on Foata normal form. 2/7730 useless extension candidates. Maximal degree in co-relation 125242. Up to 7260 conditions per place. [2023-08-24 08:38:57,316 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1666 selfloop transitions, 262 changer transitions 7/1935 dead transitions. [2023-08-24 08:38:57,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1089 places, 1935 transitions, 59852 flow [2023-08-24 08:38:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 08:38:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 08:38:57,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3022 transitions. [2023-08-24 08:38:57,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2664433080585435 [2023-08-24 08:38:57,319 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3022 transitions. [2023-08-24 08:38:57,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3022 transitions. [2023-08-24 08:38:57,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:38:57,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3022 transitions. [2023-08-24 08:38:57,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.0188679245283) internal successors, (3022), 53 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:57,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 214.0) internal successors, (11556), 54 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:57,327 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 214.0) internal successors, (11556), 54 states have internal predecessors, (11556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:38:57,327 INFO L175 Difference]: Start difference. First operand has 1038 places, 1808 transitions, 51750 flow. Second operand 53 states and 3022 transitions. [2023-08-24 08:38:57,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1089 places, 1935 transitions, 59852 flow [2023-08-24 08:39:05,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1053 places, 1935 transitions, 57987 flow, removed 831 selfloop flow, removed 36 redundant places. [2023-08-24 08:39:05,316 INFO L231 Difference]: Finished difference. Result has 1059 places, 1860 transitions, 54135 flow [2023-08-24 08:39:05,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=49891, PETRI_DIFFERENCE_MINUEND_PLACES=1001, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=54135, PETRI_PLACES=1059, PETRI_TRANSITIONS=1860} [2023-08-24 08:39:05,317 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1038 predicate places. [2023-08-24 08:39:05,317 INFO L495 AbstractCegarLoop]: Abstraction has has 1059 places, 1860 transitions, 54135 flow [2023-08-24 08:39:05,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:05,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:39:05,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:39:05,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-24 08:39:05,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-24 08:39:05,523 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:39:05,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:39:05,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1744095146, now seen corresponding path program 71 times [2023-08-24 08:39:05,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:39:05,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260549100] [2023-08-24 08:39:05,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:39:05,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:39:05,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:39:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:39:05,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:39:05,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260549100] [2023-08-24 08:39:05,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260549100] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:39:05,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230877308] [2023-08-24 08:39:05,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:39:05,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:39:05,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:39:05,956 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:39:05,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-24 08:39:06,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 08:39:06,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:39:06,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:39:06,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:39:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:39:06,301 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:39:06,301 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 35 treesize of output 14 [2023-08-24 08:39:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:39:06,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:39:06,472 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:39:06,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:39:06,610 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:39:06,610 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:39:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:39:06,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230877308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:39:06,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:39:06,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 8] total 22 [2023-08-24 08:39:06,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084001763] [2023-08-24 08:39:06,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:39:06,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:39:06,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:39:06,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:39:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:39:06,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 214 [2023-08-24 08:39:06,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1059 places, 1860 transitions, 54135 flow. Second operand has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:06,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:39:06,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 214 [2023-08-24 08:39:06,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:39:13,217 INFO L124 PetriNetUnfolderBase]: 4564/7866 cut-off events. [2023-08-24 08:39:13,217 INFO L125 PetriNetUnfolderBase]: For 1239072/1239072 co-relation queries the response was YES. [2023-08-24 08:39:13,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129303 conditions, 7866 events. 4564/7866 cut-off events. For 1239072/1239072 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 55606 event pairs, 605 based on Foata normal form. 2/7834 useless extension candidates. Maximal degree in co-relation 128972. Up to 7582 conditions per place. [2023-08-24 08:39:13,378 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 1787 selfloop transitions, 127 changer transitions 2/1916 dead transitions. [2023-08-24 08:39:13,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1082 places, 1916 transitions, 60137 flow [2023-08-24 08:39:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 08:39:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 08:39:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1718 transitions. [2023-08-24 08:39:13,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33450155763239875 [2023-08-24 08:39:13,380 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1718 transitions. [2023-08-24 08:39:13,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1718 transitions. [2023-08-24 08:39:13,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:39:13,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1718 transitions. [2023-08-24 08:39:13,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.58333333333333) internal successors, (1718), 24 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:13,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 214.0) internal successors, (5350), 25 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:13,383 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 214.0) internal successors, (5350), 25 states have internal predecessors, (5350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:13,384 INFO L175 Difference]: Start difference. First operand has 1059 places, 1860 transitions, 54135 flow. Second operand 24 states and 1718 transitions. [2023-08-24 08:39:13,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1082 places, 1916 transitions, 60137 flow [2023-08-24 08:39:22,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1039 places, 1916 transitions, 58230 flow, removed 807 selfloop flow, removed 43 redundant places. [2023-08-24 08:39:22,274 INFO L231 Difference]: Finished difference. Result has 1044 places, 1875 transitions, 53918 flow [2023-08-24 08:39:22,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=52244, PETRI_DIFFERENCE_MINUEND_PLACES=1016, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=53918, PETRI_PLACES=1044, PETRI_TRANSITIONS=1875} [2023-08-24 08:39:22,275 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1023 predicate places. [2023-08-24 08:39:22,275 INFO L495 AbstractCegarLoop]: Abstraction has has 1044 places, 1875 transitions, 53918 flow [2023-08-24 08:39:22,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.79166666666667) internal successors, (1651), 24 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:22,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:39:22,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:39:22,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-24 08:39:22,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:39:22,480 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:39:22,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:39:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1245732884, now seen corresponding path program 72 times [2023-08-24 08:39:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:39:22,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182102029] [2023-08-24 08:39:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:39:22,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:39:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:39:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:39:23,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:39:23,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182102029] [2023-08-24 08:39:23,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182102029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:39:23,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642153524] [2023-08-24 08:39:23,089 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:39:23,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:39:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:39:23,090 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:39:23,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-24 08:39:23,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:39:23,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:39:23,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 110 conjunts are in the unsatisfiable core [2023-08-24 08:39:23,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:39:23,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:39:23,767 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 14 [2023-08-24 08:39:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:39:23,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:39:24,278 INFO L322 Elim1Store]: treesize reduction 36, result has 69.2 percent of original size [2023-08-24 08:39:24,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 92 [2023-08-24 08:39:24,366 INFO L322 Elim1Store]: treesize reduction 104, result has 11.1 percent of original size [2023-08-24 08:39:24,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 23 [2023-08-24 08:39:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:39:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642153524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:39:24,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:39:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-24 08:39:24,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242605116] [2023-08-24 08:39:24,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:39:24,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 08:39:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:39:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 08:39:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 08:39:24,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:39:24,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1044 places, 1875 transitions, 53918 flow. Second operand has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:24,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:39:24,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:39:24,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:39:33,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:39:39,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:39:44,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:39:51,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:39:53,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 08:39:55,711 INFO L124 PetriNetUnfolderBase]: 5021/8580 cut-off events. [2023-08-24 08:39:55,711 INFO L125 PetriNetUnfolderBase]: For 1528818/1528818 co-relation queries the response was YES. [2023-08-24 08:39:55,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152460 conditions, 8580 events. 5021/8580 cut-off events. For 1528818/1528818 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 61054 event pairs, 465 based on Foata normal form. 3/8551 useless extension candidates. Maximal degree in co-relation 152125. Up to 7553 conditions per place. [2023-08-24 08:39:55,873 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1708 selfloop transitions, 446 changer transitions 18/2172 dead transitions. [2023-08-24 08:39:55,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1125 places, 2172 transitions, 73793 flow [2023-08-24 08:39:55,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-08-24 08:39:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-08-24 08:39:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 5241 transitions. [2023-08-24 08:39:55,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2986665147025302 [2023-08-24 08:39:55,877 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 5241 transitions. [2023-08-24 08:39:55,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 5241 transitions. [2023-08-24 08:39:55,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:39:55,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 5241 transitions. [2023-08-24 08:39:55,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 63.91463414634146) internal successors, (5241), 82 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:55,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 214.0) internal successors, (17762), 83 states have internal predecessors, (17762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:55,888 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 214.0) internal successors, (17762), 83 states have internal predecessors, (17762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:39:55,888 INFO L175 Difference]: Start difference. First operand has 1044 places, 1875 transitions, 53918 flow. Second operand 82 states and 5241 transitions. [2023-08-24 08:39:55,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1125 places, 2172 transitions, 73793 flow [2023-08-24 08:40:06,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1109 places, 2172 transitions, 72571 flow, removed 532 selfloop flow, removed 16 redundant places. [2023-08-24 08:40:06,276 INFO L231 Difference]: Finished difference. Result has 1134 places, 2051 transitions, 67494 flow [2023-08-24 08:40:06,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=52813, PETRI_DIFFERENCE_MINUEND_PLACES=1028, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=67494, PETRI_PLACES=1134, PETRI_TRANSITIONS=2051} [2023-08-24 08:40:06,278 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1113 predicate places. [2023-08-24 08:40:06,278 INFO L495 AbstractCegarLoop]: Abstraction has has 1134 places, 2051 transitions, 67494 flow [2023-08-24 08:40:06,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 61.45238095238095) internal successors, (2581), 42 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:06,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:40:06,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:40:06,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-24 08:40:06,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:40:06,483 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:40:06,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:40:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash -791242666, now seen corresponding path program 73 times [2023-08-24 08:40:06,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:40:06,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269850426] [2023-08-24 08:40:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:40:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:40:06,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:40:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:40:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:40:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269850426] [2023-08-24 08:40:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269850426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:40:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924859795] [2023-08-24 08:40:07,048 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:40:07,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:40:07,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:40:07,049 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:40:07,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-24 08:40:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:40:07,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 08:40:07,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:40:07,490 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:40:07,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:40:07,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:40:07,661 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:40:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:40:07,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924859795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:40:07,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:40:07,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 31 [2023-08-24 08:40:07,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821440093] [2023-08-24 08:40:07,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:40:07,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:40:07,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:40:07,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:40:07,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:40:07,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 214 [2023-08-24 08:40:07,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1134 places, 2051 transitions, 67494 flow. Second operand has 33 states, 33 states have (on average 61.72727272727273) internal successors, (2037), 33 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:07,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:40:07,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 214 [2023-08-24 08:40:07,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:40:15,692 INFO L124 PetriNetUnfolderBase]: 5103/8714 cut-off events. [2023-08-24 08:40:15,692 INFO L125 PetriNetUnfolderBase]: For 1872902/1872902 co-relation queries the response was YES. [2023-08-24 08:40:15,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164147 conditions, 8714 events. 5103/8714 cut-off events. For 1872902/1872902 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 62261 event pairs, 627 based on Foata normal form. 2/8684 useless extension candidates. Maximal degree in co-relation 163787. Up to 8246 conditions per place. [2023-08-24 08:40:15,886 INFO L140 encePairwiseOnDemand]: 205/214 looper letters, 1888 selfloop transitions, 230 changer transitions 2/2120 dead transitions. [2023-08-24 08:40:15,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1159 places, 2120 transitions, 75965 flow [2023-08-24 08:40:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 08:40:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 08:40:15,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1790 transitions. [2023-08-24 08:40:15,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2987316421895861 [2023-08-24 08:40:15,888 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1790 transitions. [2023-08-24 08:40:15,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1790 transitions. [2023-08-24 08:40:15,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:40:15,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1790 transitions. [2023-08-24 08:40:15,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 63.92857142857143) internal successors, (1790), 28 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:15,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:15,892 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 214.0) internal successors, (6206), 29 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:15,892 INFO L175 Difference]: Start difference. First operand has 1134 places, 2051 transitions, 67494 flow. Second operand 28 states and 1790 transitions. [2023-08-24 08:40:15,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1159 places, 2120 transitions, 75965 flow [2023-08-24 08:40:29,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1125 places, 2120 transitions, 65772 flow, removed 5018 selfloop flow, removed 34 redundant places. [2023-08-24 08:40:29,899 INFO L231 Difference]: Finished difference. Result has 1132 places, 2079 transitions, 61182 flow [2023-08-24 08:40:29,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=58311, PETRI_DIFFERENCE_MINUEND_PLACES=1098, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=61182, PETRI_PLACES=1132, PETRI_TRANSITIONS=2079} [2023-08-24 08:40:29,901 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1111 predicate places. [2023-08-24 08:40:29,901 INFO L495 AbstractCegarLoop]: Abstraction has has 1132 places, 2079 transitions, 61182 flow [2023-08-24 08:40:29,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 61.72727272727273) internal successors, (2037), 33 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:29,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:40:29,902 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:40:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-24 08:40:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-08-24 08:40:30,106 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:40:30,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:40:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 828391628, now seen corresponding path program 74 times [2023-08-24 08:40:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:40:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160305770] [2023-08-24 08:40:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:40:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:40:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:40:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:40:30,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:40:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160305770] [2023-08-24 08:40:30,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160305770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:40:30,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290310474] [2023-08-24 08:40:30,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:40:30,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:40:30,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:40:30,912 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:40:30,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-24 08:40:31,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:40:31,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:40:31,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 107 conjunts are in the unsatisfiable core [2023-08-24 08:40:31,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:40:31,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:40:31,409 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 15 treesize of output 14 [2023-08-24 08:40:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:40:31,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:40:31,900 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:40:31,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-08-24 08:40:32,276 INFO L322 Elim1Store]: treesize reduction 80, result has 14.0 percent of original size [2023-08-24 08:40:32,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 24 [2023-08-24 08:40:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:40:32,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290310474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:40:32,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:40:32,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 40 [2023-08-24 08:40:32,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724653507] [2023-08-24 08:40:32,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:40:32,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-24 08:40:32,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:40:32,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-24 08:40:32,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2023-08-24 08:40:32,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:40:32,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1132 places, 2079 transitions, 61182 flow. Second operand has 42 states, 42 states have (on average 54.45238095238095) internal successors, (2287), 42 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:32,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:40:32,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:40:32,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:40:45,037 INFO L124 PetriNetUnfolderBase]: 5254/8966 cut-off events. [2023-08-24 08:40:45,037 INFO L125 PetriNetUnfolderBase]: For 1761159/1761159 co-relation queries the response was YES. [2023-08-24 08:40:45,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156767 conditions, 8966 events. 5254/8966 cut-off events. For 1761159/1761159 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 64362 event pairs, 484 based on Foata normal form. 1/8935 useless extension candidates. Maximal degree in co-relation 156401. Up to 8108 conditions per place. [2023-08-24 08:40:45,230 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1799 selfloop transitions, 418 changer transitions 5/2222 dead transitions. [2023-08-24 08:40:45,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1181 places, 2222 transitions, 70876 flow [2023-08-24 08:40:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 08:40:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 08:40:45,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2854 transitions. [2023-08-24 08:40:45,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2667289719626168 [2023-08-24 08:40:45,232 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2854 transitions. [2023-08-24 08:40:45,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2854 transitions. [2023-08-24 08:40:45,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:40:45,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2854 transitions. [2023-08-24 08:40:45,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.08) internal successors, (2854), 50 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:45,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 214.0) internal successors, (10914), 51 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:45,239 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 214.0) internal successors, (10914), 51 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:45,239 INFO L175 Difference]: Start difference. First operand has 1132 places, 2079 transitions, 61182 flow. Second operand 50 states and 2854 transitions. [2023-08-24 08:40:45,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1181 places, 2222 transitions, 70876 flow [2023-08-24 08:40:58,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1163 places, 2222 transitions, 68868 flow, removed 872 selfloop flow, removed 18 redundant places. [2023-08-24 08:40:58,183 INFO L231 Difference]: Finished difference. Result has 1170 places, 2141 transitions, 64623 flow [2023-08-24 08:40:58,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=59178, PETRI_DIFFERENCE_MINUEND_PLACES=1114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=64623, PETRI_PLACES=1170, PETRI_TRANSITIONS=2141} [2023-08-24 08:40:58,187 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1149 predicate places. [2023-08-24 08:40:58,187 INFO L495 AbstractCegarLoop]: Abstraction has has 1170 places, 2141 transitions, 64623 flow [2023-08-24 08:40:58,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 54.45238095238095) internal successors, (2287), 42 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:58,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:40:58,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:40:58,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-08-24 08:40:58,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-08-24 08:40:58,392 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:40:58,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:40:58,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1361506356, now seen corresponding path program 75 times [2023-08-24 08:40:58,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:40:58,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603340552] [2023-08-24 08:40:58,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:40:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:40:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:40:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:40:59,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:40:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603340552] [2023-08-24 08:40:59,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603340552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:40:59,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742023053] [2023-08-24 08:40:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:40:59,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:40:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:40:59,027 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:40:59,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-24 08:40:59,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 08:40:59,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:40:59,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-24 08:40:59,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:40:59,334 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 13 treesize of output 9 [2023-08-24 08:40:59,367 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 08:40:59,389 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 08:40:59,548 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:40:59,548 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 14 [2023-08-24 08:40:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:40:59,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:40:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:40:59,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742023053] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:40:59,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:40:59,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 36 [2023-08-24 08:40:59,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802760390] [2023-08-24 08:40:59,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:40:59,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 08:40:59,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:40:59,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 08:40:59,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 08:40:59,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:40:59,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1170 places, 2141 transitions, 64623 flow. Second operand has 38 states, 38 states have (on average 54.578947368421055) internal successors, (2074), 38 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:40:59,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:40:59,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:40:59,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:41:09,573 INFO L124 PetriNetUnfolderBase]: 5308/9071 cut-off events. [2023-08-24 08:41:09,573 INFO L125 PetriNetUnfolderBase]: For 1849331/1849331 co-relation queries the response was YES. [2023-08-24 08:41:09,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160733 conditions, 9071 events. 5308/9071 cut-off events. For 1849331/1849331 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 65290 event pairs, 549 based on Foata normal form. 1/9040 useless extension candidates. Maximal degree in co-relation 160359. Up to 8507 conditions per place. [2023-08-24 08:41:09,761 INFO L140 encePairwiseOnDemand]: 203/214 looper letters, 1929 selfloop transitions, 290 changer transitions 6/2225 dead transitions. [2023-08-24 08:41:09,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1209 places, 2225 transitions, 73014 flow [2023-08-24 08:41:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 08:41:09,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 08:41:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2279 transitions. [2023-08-24 08:41:09,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26623831775700935 [2023-08-24 08:41:09,763 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2279 transitions. [2023-08-24 08:41:09,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2279 transitions. [2023-08-24 08:41:09,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:41:09,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2279 transitions. [2023-08-24 08:41:09,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 56.975) internal successors, (2279), 40 states have internal predecessors, (2279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:09,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:09,770 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:09,770 INFO L175 Difference]: Start difference. First operand has 1170 places, 2141 transitions, 64623 flow. Second operand 40 states and 2279 transitions. [2023-08-24 08:41:09,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1209 places, 2225 transitions, 73014 flow [2023-08-24 08:41:26,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1181 places, 2225 transitions, 70363 flow, removed 1217 selfloop flow, removed 28 redundant places. [2023-08-24 08:41:26,842 INFO L231 Difference]: Finished difference. Result has 1189 places, 2167 transitions, 65767 flow [2023-08-24 08:41:26,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=62216, PETRI_DIFFERENCE_MINUEND_PLACES=1142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1866, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=65767, PETRI_PLACES=1189, PETRI_TRANSITIONS=2167} [2023-08-24 08:41:26,843 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1168 predicate places. [2023-08-24 08:41:26,843 INFO L495 AbstractCegarLoop]: Abstraction has has 1189 places, 2167 transitions, 65767 flow [2023-08-24 08:41:26,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 54.578947368421055) internal successors, (2074), 38 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:26,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:41:26,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:41:26,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-24 08:41:27,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:41:27,048 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:41:27,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:41:27,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2063847190, now seen corresponding path program 76 times [2023-08-24 08:41:27,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:41:27,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438804475] [2023-08-24 08:41:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:41:27,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:41:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:41:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:41:27,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:41:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438804475] [2023-08-24 08:41:27,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438804475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:41:27,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673268890] [2023-08-24 08:41:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:41:27,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:41:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:41:27,615 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:41:27,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-24 08:41:27,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:41:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:41:27,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2023-08-24 08:41:27,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:41:27,888 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 08:41:27,915 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 08:41:27,943 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 08:41:28,160 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:28,160 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 15 treesize of output 14 [2023-08-24 08:41:28,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:41:28,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:41:30,921 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset 8))) (and (forall ((v_subst_57 Int) (v_ArrVal_2894 (Array Int Int))) (or (<= c_~N~0 v_subst_57) (< (+ v_subst_57 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2894) c_~A~0.base))) (< (select .cse0 .cse1) (+ c_~counter~0 (select .cse0 (+ c_~A~0.offset (* v_subst_57 4))) 1))))) (forall ((v_subst_58 Int) (v_ArrVal_2894 (Array Int Int))) (or (<= c_~N~0 v_subst_58) (< (+ v_subst_58 1) c_~N~0) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2894) c_~A~0.base))) (<= (+ c_~counter~0 (select .cse2 (+ (* v_subst_58 4) c_~A~0.offset))) (select .cse2 .cse1))))))) is different from false [2023-08-24 08:41:31,020 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:31,020 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 55 treesize of output 44 [2023-08-24 08:41:31,026 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:31,026 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 94 treesize of output 88 [2023-08-24 08:41:31,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:31,032 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 80 treesize of output 68 [2023-08-24 08:41:31,039 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:31,039 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 34 treesize of output 33 [2023-08-24 08:41:31,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:31,127 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 56 treesize of output 45 [2023-08-24 08:41:31,135 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:41:31,135 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 98 treesize of output 88 [2023-08-24 08:41:31,143 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:41:31,144 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 83 treesize of output 67 [2023-08-24 08:41:31,156 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:41:31,156 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 35 treesize of output 30 [2023-08-24 08:41:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:41:31,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673268890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:41:31,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:41:31,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2023-08-24 08:41:31,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381738424] [2023-08-24 08:41:31,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:41:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 08:41:31,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:41:31,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 08:41:31,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1619, Unknown=1, NotChecked=82, Total=1892 [2023-08-24 08:41:31,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:41:31,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1189 places, 2167 transitions, 65767 flow. Second operand has 44 states, 44 states have (on average 54.38636363636363) internal successors, (2393), 44 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:31,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:41:31,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:41:31,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:41:40,992 INFO L124 PetriNetUnfolderBase]: 5379/9212 cut-off events. [2023-08-24 08:41:40,993 INFO L125 PetriNetUnfolderBase]: For 1866321/1866321 co-relation queries the response was YES. [2023-08-24 08:41:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162101 conditions, 9212 events. 5379/9212 cut-off events. For 1866321/1866321 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 66659 event pairs, 681 based on Foata normal form. 2/9182 useless extension candidates. Maximal degree in co-relation 161719. Up to 8770 conditions per place. [2023-08-24 08:41:41,199 INFO L140 encePairwiseOnDemand]: 204/214 looper letters, 2022 selfloop transitions, 222 changer transitions 6/2250 dead transitions. [2023-08-24 08:41:41,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1228 places, 2250 transitions, 73207 flow [2023-08-24 08:41:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 08:41:41,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 08:41:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2269 transitions. [2023-08-24 08:41:41,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2650700934579439 [2023-08-24 08:41:41,201 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2269 transitions. [2023-08-24 08:41:41,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2269 transitions. [2023-08-24 08:41:41,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:41:41,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2269 transitions. [2023-08-24 08:41:41,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 56.725) internal successors, (2269), 40 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:41,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:41,207 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 214.0) internal successors, (8774), 41 states have internal predecessors, (8774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:41,207 INFO L175 Difference]: Start difference. First operand has 1189 places, 2167 transitions, 65767 flow. Second operand 40 states and 2269 transitions. [2023-08-24 08:41:41,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1228 places, 2250 transitions, 73207 flow [2023-08-24 08:41:57,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1201 places, 2250 transitions, 70891 flow, removed 1040 selfloop flow, removed 27 redundant places. [2023-08-24 08:41:57,604 INFO L231 Difference]: Finished difference. Result has 1206 places, 2197 transitions, 66194 flow [2023-08-24 08:41:57,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=63529, PETRI_DIFFERENCE_MINUEND_PLACES=1162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1959, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=66194, PETRI_PLACES=1206, PETRI_TRANSITIONS=2197} [2023-08-24 08:41:57,605 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1185 predicate places. [2023-08-24 08:41:57,605 INFO L495 AbstractCegarLoop]: Abstraction has has 1206 places, 2197 transitions, 66194 flow [2023-08-24 08:41:57,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 54.38636363636363) internal successors, (2393), 44 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:57,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:41:57,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:41:57,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-24 08:41:57,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:41:57,811 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:41:57,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:41:57,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1746849516, now seen corresponding path program 77 times [2023-08-24 08:41:57,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:41:57,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814657837] [2023-08-24 08:41:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:41:57,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:41:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:41:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:41:58,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:41:58,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814657837] [2023-08-24 08:41:58,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814657837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:41:58,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229598601] [2023-08-24 08:41:58,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:41:58,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:41:58,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:41:58,549 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:41:58,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-24 08:41:58,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:41:58,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:41:58,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 08:41:58,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:41:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:41:59,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:41:59,223 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:41:59,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 95 [2023-08-24 08:41:59,341 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 08:41:59,341 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 63 treesize of output 24 [2023-08-24 08:41:59,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:41:59,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229598601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:41:59,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:41:59,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 08:41:59,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762858868] [2023-08-24 08:41:59,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:41:59,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:41:59,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:41:59,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:41:59,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 08:41:59,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:41:59,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1206 places, 2197 transitions, 66194 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:41:59,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:41:59,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:41:59,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:42:09,474 INFO L124 PetriNetUnfolderBase]: 5502/9408 cut-off events. [2023-08-24 08:42:09,474 INFO L125 PetriNetUnfolderBase]: For 1965690/1965690 co-relation queries the response was YES. [2023-08-24 08:42:09,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168381 conditions, 9408 events. 5502/9408 cut-off events. For 1965690/1965690 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 68301 event pairs, 567 based on Foata normal form. 3/9379 useless extension candidates. Maximal degree in co-relation 167994. Up to 8880 conditions per place. [2023-08-24 08:42:09,692 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2002 selfloop transitions, 290 changer transitions 6/2298 dead transitions. [2023-08-24 08:42:09,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1244 places, 2298 transitions, 76490 flow [2023-08-24 08:42:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 08:42:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 08:42:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2230 transitions. [2023-08-24 08:42:09,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26719386532470646 [2023-08-24 08:42:09,694 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2230 transitions. [2023-08-24 08:42:09,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2230 transitions. [2023-08-24 08:42:09,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:42:09,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2230 transitions. [2023-08-24 08:42:09,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 57.17948717948718) internal successors, (2230), 39 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:42:09,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:42:09,699 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 214.0) internal successors, (8560), 40 states have internal predecessors, (8560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:42:09,699 INFO L175 Difference]: Start difference. First operand has 1206 places, 2197 transitions, 66194 flow. Second operand 39 states and 2230 transitions. [2023-08-24 08:42:09,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1244 places, 2298 transitions, 76490 flow [2023-08-24 08:42:27,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1220 places, 2298 transitions, 75084 flow, removed 639 selfloop flow, removed 24 redundant places. [2023-08-24 08:42:27,953 INFO L231 Difference]: Finished difference. Result has 1229 places, 2245 transitions, 70359 flow [2023-08-24 08:42:27,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=64788, PETRI_DIFFERENCE_MINUEND_PLACES=1182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=70359, PETRI_PLACES=1229, PETRI_TRANSITIONS=2245} [2023-08-24 08:42:27,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1208 predicate places. [2023-08-24 08:42:27,959 INFO L495 AbstractCegarLoop]: Abstraction has has 1229 places, 2245 transitions, 70359 flow [2023-08-24 08:42:27,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:42:27,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:42:27,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:42:27,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-08-24 08:42:28,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-08-24 08:42:28,164 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:42:28,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:42:28,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1319493940, now seen corresponding path program 78 times [2023-08-24 08:42:28,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:42:28,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579009680] [2023-08-24 08:42:28,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:42:28,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:42:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:42:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:42:28,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:42:28,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579009680] [2023-08-24 08:42:28,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579009680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:42:28,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344514249] [2023-08-24 08:42:28,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:42:28,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:42:28,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:42:28,979 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:42:28,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-24 08:42:29,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 08:42:29,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:42:29,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:42:29,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:42:29,536 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:42:29,536 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 14 [2023-08-24 08:42:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:42:29,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:42:44,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:42:44,446 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 121 [2023-08-24 08:42:45,985 INFO L322 Elim1Store]: treesize reduction 98, result has 11.7 percent of original size [2023-08-24 08:42:45,985 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 24 [2023-08-24 08:42:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:42:46,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344514249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:42:46,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:42:46,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-24 08:42:46,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39632612] [2023-08-24 08:42:46,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:42:46,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-24 08:42:46,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:42:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-24 08:42:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1690, Unknown=6, NotChecked=0, Total=1980 [2023-08-24 08:42:46,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:42:46,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1229 places, 2245 transitions, 70359 flow. Second operand has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:42:46,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:42:46,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:42:46,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:43:01,478 INFO L124 PetriNetUnfolderBase]: 5564/9526 cut-off events. [2023-08-24 08:43:01,478 INFO L125 PetriNetUnfolderBase]: For 2161488/2161488 co-relation queries the response was YES. [2023-08-24 08:43:01,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174190 conditions, 9526 events. 5564/9526 cut-off events. For 2161488/2161488 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 69338 event pairs, 507 based on Foata normal form. 2/9496 useless extension candidates. Maximal degree in co-relation 173793. Up to 8870 conditions per place. [2023-08-24 08:43:01,710 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 1976 selfloop transitions, 352 changer transitions 10/2338 dead transitions. [2023-08-24 08:43:01,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1278 places, 2338 transitions, 78461 flow [2023-08-24 08:43:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 08:43:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 08:43:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2827 transitions. [2023-08-24 08:43:01,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2642056074766355 [2023-08-24 08:43:01,712 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2827 transitions. [2023-08-24 08:43:01,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2827 transitions. [2023-08-24 08:43:01,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:43:01,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2827 transitions. [2023-08-24 08:43:01,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 56.54) internal successors, (2827), 50 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:01,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 214.0) internal successors, (10914), 51 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:01,719 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 214.0) internal successors, (10914), 51 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:01,719 INFO L175 Difference]: Start difference. First operand has 1229 places, 2245 transitions, 70359 flow. Second operand 50 states and 2827 transitions. [2023-08-24 08:43:01,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1278 places, 2338 transitions, 78461 flow [2023-08-24 08:43:24,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1258 places, 2338 transitions, 74092 flow, removed 2112 selfloop flow, removed 20 redundant places. [2023-08-24 08:43:25,023 INFO L231 Difference]: Finished difference. Result has 1264 places, 2281 transitions, 69914 flow [2023-08-24 08:43:25,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=65990, PETRI_DIFFERENCE_MINUEND_PLACES=1209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=327, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=69914, PETRI_PLACES=1264, PETRI_TRANSITIONS=2281} [2023-08-24 08:43:25,024 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1243 predicate places. [2023-08-24 08:43:25,024 INFO L495 AbstractCegarLoop]: Abstraction has has 1264 places, 2281 transitions, 69914 flow [2023-08-24 08:43:25,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 54.355555555555554) internal successors, (2446), 45 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:25,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:43:25,025 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:43:25,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-24 08:43:25,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:43:25,230 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:43:25,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:43:25,230 INFO L85 PathProgramCache]: Analyzing trace with hash -487765676, now seen corresponding path program 79 times [2023-08-24 08:43:25,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:43:25,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196117373] [2023-08-24 08:43:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:43:25,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:43:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:43:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:43:25,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:43:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196117373] [2023-08-24 08:43:25,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196117373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:43:25,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269182653] [2023-08-24 08:43:25,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:43:25,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:43:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:43:25,965 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:43:25,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-24 08:43:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:43:26,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 103 conjunts are in the unsatisfiable core [2023-08-24 08:43:26,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:43:26,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:43:26,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:43:26,650 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:43:26,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 90 [2023-08-24 08:43:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 08:43:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269182653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:43:26,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:43:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 8] total 33 [2023-08-24 08:43:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263418783] [2023-08-24 08:43:26,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:43:26,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:43:26,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:43:26,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:43:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1061, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 08:43:26,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:43:26,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1264 places, 2281 transitions, 69914 flow. Second operand has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:26,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:43:26,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:43:26,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:43:37,615 INFO L124 PetriNetUnfolderBase]: 5679/9704 cut-off events. [2023-08-24 08:43:37,615 INFO L125 PetriNetUnfolderBase]: For 2276638/2276638 co-relation queries the response was YES. [2023-08-24 08:43:37,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178743 conditions, 9704 events. 5679/9704 cut-off events. For 2276638/2276638 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 70642 event pairs, 539 based on Foata normal form. 3/9667 useless extension candidates. Maximal degree in co-relation 178339. Up to 9110 conditions per place. [2023-08-24 08:43:37,855 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2053 selfloop transitions, 332 changer transitions 6/2391 dead transitions. [2023-08-24 08:43:37,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1305 places, 2391 transitions, 80735 flow [2023-08-24 08:43:37,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 08:43:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 08:43:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2523 transitions. [2023-08-24 08:43:37,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2679481733220051 [2023-08-24 08:43:37,857 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2523 transitions. [2023-08-24 08:43:37,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2523 transitions. [2023-08-24 08:43:37,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:43:37,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2523 transitions. [2023-08-24 08:43:37,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.34090909090909) internal successors, (2523), 44 states have internal predecessors, (2523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:37,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:37,863 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:43:37,863 INFO L175 Difference]: Start difference. First operand has 1264 places, 2281 transitions, 69914 flow. Second operand 44 states and 2523 transitions. [2023-08-24 08:43:37,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1305 places, 2391 transitions, 80735 flow [2023-08-24 08:44:05,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1276 places, 2391 transitions, 78033 flow, removed 1227 selfloop flow, removed 29 redundant places. [2023-08-24 08:44:05,785 INFO L231 Difference]: Finished difference. Result has 1286 places, 2325 transitions, 73172 flow [2023-08-24 08:44:05,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=67468, PETRI_DIFFERENCE_MINUEND_PLACES=1233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=73172, PETRI_PLACES=1286, PETRI_TRANSITIONS=2325} [2023-08-24 08:44:05,786 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1265 predicate places. [2023-08-24 08:44:05,786 INFO L495 AbstractCegarLoop]: Abstraction has has 1286 places, 2325 transitions, 73172 flow [2023-08-24 08:44:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 54.6) internal successors, (1911), 35 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:05,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:05,787 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:44:05,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-24 08:44:05,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:05,992 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:44:05,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:05,992 INFO L85 PathProgramCache]: Analyzing trace with hash -371992204, now seen corresponding path program 80 times [2023-08-24 08:44:05,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:05,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981561321] [2023-08-24 08:44:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:05,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:06,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:44:06,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:06,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981561321] [2023-08-24 08:44:06,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981561321] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:06,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730472889] [2023-08-24 08:44:06,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:44:06,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:06,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:06,695 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:44:06,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-24 08:44:06,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:44:06,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:06,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:44:06,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:07,266 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:07,266 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 15 treesize of output 14 [2023-08-24 08:44:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:44:07,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:07,790 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:07,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 61 treesize of output 113 [2023-08-24 08:44:08,285 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-24 08:44:08,286 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 66 [2023-08-24 08:44:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:44:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730472889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:08,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 08:44:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122728452] [2023-08-24 08:44:08,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:44:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:44:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1578, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 08:44:08,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:44:08,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1286 places, 2325 transitions, 73172 flow. Second operand has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:08,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:08,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:44:08,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:20,626 INFO L124 PetriNetUnfolderBase]: 5733/9807 cut-off events. [2023-08-24 08:44:20,627 INFO L125 PetriNetUnfolderBase]: For 2437414/2437414 co-relation queries the response was YES. [2023-08-24 08:44:20,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182815 conditions, 9807 events. 5733/9807 cut-off events. For 2437414/2437414 co-relation queries the response was YES. Maximal size of possible extension queue 757. Compared 71603 event pairs, 574 based on Foata normal form. 2/9769 useless extension candidates. Maximal degree in co-relation 182404. Up to 9305 conditions per place. [2023-08-24 08:44:20,878 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2137 selfloop transitions, 270 changer transitions 8/2415 dead transitions. [2023-08-24 08:44:20,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1328 places, 2415 transitions, 80845 flow [2023-08-24 08:44:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 08:44:20,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 08:44:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2460 transitions. [2023-08-24 08:44:20,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26733318843729625 [2023-08-24 08:44:20,880 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2460 transitions. [2023-08-24 08:44:20,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2460 transitions. [2023-08-24 08:44:20,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:20,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2460 transitions. [2023-08-24 08:44:20,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 57.2093023255814) internal successors, (2460), 43 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:20,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 214.0) internal successors, (9416), 44 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:20,886 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 214.0) internal successors, (9416), 44 states have internal predecessors, (9416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:20,886 INFO L175 Difference]: Start difference. First operand has 1286 places, 2325 transitions, 73172 flow. Second operand 43 states and 2460 transitions. [2023-08-24 08:44:20,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1328 places, 2415 transitions, 80845 flow [2023-08-24 08:44:44,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1301 places, 2415 transitions, 76837 flow, removed 1892 selfloop flow, removed 27 redundant places. [2023-08-24 08:44:44,511 INFO L231 Difference]: Finished difference. Result has 1307 places, 2347 transitions, 71629 flow [2023-08-24 08:44:44,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=69166, PETRI_DIFFERENCE_MINUEND_PLACES=1259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2059, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=71629, PETRI_PLACES=1307, PETRI_TRANSITIONS=2347} [2023-08-24 08:44:44,512 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1286 predicate places. [2023-08-24 08:44:44,512 INFO L495 AbstractCegarLoop]: Abstraction has has 1307 places, 2347 transitions, 71629 flow [2023-08-24 08:44:44,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 54.41860465116279) internal successors, (2340), 43 states have internal predecessors, (2340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:44,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:44,512 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:44:44,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-08-24 08:44:44,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-08-24 08:44:44,718 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:44:44,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -427937842, now seen corresponding path program 81 times [2023-08-24 08:44:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:44,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820348586] [2023-08-24 08:44:44,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:44,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:44:45,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:45,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820348586] [2023-08-24 08:44:45,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820348586] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:45,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444149881] [2023-08-24 08:44:45,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:44:45,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:45,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:45,341 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:44:45,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-24 08:44:45,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:44:45,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:45,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 121 conjunts are in the unsatisfiable core [2023-08-24 08:44:45,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:45,670 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 13 treesize of output 9 [2023-08-24 08:44:45,701 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 08:44:45,722 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 08:44:45,901 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:45,902 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 14 [2023-08-24 08:44:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:44:45,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 08:44:47,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444149881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:47,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:47,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 11] total 39 [2023-08-24 08:44:47,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455012829] [2023-08-24 08:44:47,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:47,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 08:44:47,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:47,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 08:44:47,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2023-08-24 08:44:47,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:44:47,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1307 places, 2347 transitions, 71629 flow. Second operand has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:44:47,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:47,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:44:47,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:01,451 INFO L124 PetriNetUnfolderBase]: 5908/10139 cut-off events. [2023-08-24 08:45:01,451 INFO L125 PetriNetUnfolderBase]: For 2619782/2619782 co-relation queries the response was YES. [2023-08-24 08:45:01,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190065 conditions, 10139 events. 5908/10139 cut-off events. For 2619782/2619782 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 74865 event pairs, 677 based on Foata normal form. 1/10094 useless extension candidates. Maximal degree in co-relation 189648. Up to 9240 conditions per place. [2023-08-24 08:45:01,810 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2111 selfloop transitions, 367 changer transitions 7/2485 dead transitions. [2023-08-24 08:45:01,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1350 places, 2485 transitions, 82557 flow [2023-08-24 08:45:01,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 08:45:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 08:45:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2519 transitions. [2023-08-24 08:45:01,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2675233644859813 [2023-08-24 08:45:01,812 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2519 transitions. [2023-08-24 08:45:01,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2519 transitions. [2023-08-24 08:45:01,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:01,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2519 transitions. [2023-08-24 08:45:01,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.25) internal successors, (2519), 44 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:01,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:01,818 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 214.0) internal successors, (9630), 45 states have internal predecessors, (9630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:01,818 INFO L175 Difference]: Start difference. First operand has 1307 places, 2347 transitions, 71629 flow. Second operand 44 states and 2519 transitions. [2023-08-24 08:45:01,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1350 places, 2485 transitions, 82557 flow [2023-08-24 08:45:29,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1320 places, 2485 transitions, 81781 flow, removed 322 selfloop flow, removed 30 redundant places. [2023-08-24 08:45:29,627 INFO L231 Difference]: Finished difference. Result has 1335 places, 2405 transitions, 76280 flow [2023-08-24 08:45:29,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=70853, PETRI_DIFFERENCE_MINUEND_PLACES=1277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2002, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=76280, PETRI_PLACES=1335, PETRI_TRANSITIONS=2405} [2023-08-24 08:45:29,628 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1314 predicate places. [2023-08-24 08:45:29,628 INFO L495 AbstractCegarLoop]: Abstraction has has 1335 places, 2405 transitions, 76280 flow [2023-08-24 08:45:29,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 54.46341463414634) internal successors, (2233), 41 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:29,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:29,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:45:29,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-24 08:45:29,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:29,834 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 08:45:29,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1344402454, now seen corresponding path program 82 times [2023-08-24 08:45:29,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:29,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142869609] [2023-08-24 08:45:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:29,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:30,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:45:30,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:30,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142869609] [2023-08-24 08:45:30,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142869609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:30,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696572892] [2023-08-24 08:45:30,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:45:30,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:30,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:30,592 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:45:30,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-24 08:45:30,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:45:30,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:30,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 111 conjunts are in the unsatisfiable core [2023-08-24 08:45:30,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:31,120 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:31,121 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 15 treesize of output 14 [2023-08-24 08:45:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:45:31,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:31,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:31,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 103 [2023-08-24 08:45:32,003 INFO L322 Elim1Store]: treesize reduction 44, result has 52.7 percent of original size [2023-08-24 08:45:32,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 52 treesize of output 60 [2023-08-24 08:45:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 08:45:32,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696572892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:32,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:32,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 08:45:32,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593922122] [2023-08-24 08:45:32,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:32,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 08:45:32,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:32,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 08:45:32,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 08:45:32,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 214 [2023-08-24 08:45:32,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1335 places, 2405 transitions, 76280 flow. Second operand has 43 states, 43 states have (on average 54.51162790697674) internal successors, (2344), 43 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:32,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:32,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 214 [2023-08-24 08:45:32,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:46,008 INFO L124 PetriNetUnfolderBase]: 5933/10191 cut-off events. [2023-08-24 08:45:46,008 INFO L125 PetriNetUnfolderBase]: For 2849242/2849242 co-relation queries the response was YES. [2023-08-24 08:45:46,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195530 conditions, 10191 events. 5933/10191 cut-off events. For 2849242/2849242 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 75440 event pairs, 702 based on Foata normal form. 2/10147 useless extension candidates. Maximal degree in co-relation 195097. Up to 9771 conditions per place. [2023-08-24 08:45:46,256 INFO L140 encePairwiseOnDemand]: 202/214 looper letters, 2214 selfloop transitions, 266 changer transitions 6/2486 dead transitions. [2023-08-24 08:45:46,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1383 places, 2486 transitions, 83877 flow [2023-08-24 08:45:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 08:45:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 08:45:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2784 transitions. [2023-08-24 08:45:46,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2654968529467862 [2023-08-24 08:45:46,259 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2784 transitions. [2023-08-24 08:45:46,259 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2784 transitions. [2023-08-24 08:45:46,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:46,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2784 transitions. [2023-08-24 08:45:46,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 56.816326530612244) internal successors, (2784), 49 states have internal predecessors, (2784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:46,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 214.0) internal successors, (10700), 50 states have internal predecessors, (10700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:46,265 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 214.0) internal successors, (10700), 50 states have internal predecessors, (10700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:46,265 INFO L175 Difference]: Start difference. First operand has 1335 places, 2405 transitions, 76280 flow. Second operand 49 states and 2784 transitions. [2023-08-24 08:45:46,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1383 places, 2486 transitions, 83877 flow Received shutdown request... [2023-08-24 08:45:59,278 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 08:45:59,279 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:45:59,280 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 08:45:59,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2023-08-24 08:45:59,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:59,484 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-24 08:45:59,485 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 08:45:59,485 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 08:45:59,486 INFO L445 BasicCegarLoop]: Path program histogram: [82, 1, 1, 1, 1, 1] [2023-08-24 08:45:59,488 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 08:45:59,488 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 08:45:59,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 08:45:59 BasicIcfg [2023-08-24 08:45:59,490 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 08:45:59,490 INFO L158 Benchmark]: Toolchain (without parser) took 836080.90ms. Allocated memory was 392.2MB in the beginning and 7.2GB in the end (delta: 6.8GB). Free memory was 368.2MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-08-24 08:45:59,490 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 232.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:45:59,490 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.28ms. Allocated memory is still 392.2MB. Free memory was 367.8MB in the beginning and 356.4MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 08:45:59,490 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.05ms. Allocated memory is still 392.2MB. Free memory was 356.4MB in the beginning and 354.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:45:59,492 INFO L158 Benchmark]: Boogie Preprocessor took 33.53ms. Allocated memory is still 392.2MB. Free memory was 354.5MB in the beginning and 352.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:45:59,492 INFO L158 Benchmark]: RCFGBuilder took 448.13ms. Allocated memory is still 392.2MB. Free memory was 352.8MB in the beginning and 368.0MB in the end (delta: -15.2MB). Peak memory consumption was 30.1MB. Max. memory is 16.0GB. [2023-08-24 08:45:59,492 INFO L158 Benchmark]: TraceAbstraction took 835291.55ms. Allocated memory was 392.2MB in the beginning and 7.2GB in the end (delta: 6.8GB). Free memory was 367.3MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-08-24 08:45:59,492 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 255.9MB. Free memory is still 232.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 260.28ms. Allocated memory is still 392.2MB. Free memory was 367.8MB in the beginning and 356.4MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.05ms. Allocated memory is still 392.2MB. Free memory was 356.4MB in the beginning and 354.5MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.53ms. Allocated memory is still 392.2MB. Free memory was 354.5MB in the beginning and 352.8MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 448.13ms. Allocated memory is still 392.2MB. Free memory was 352.8MB in the beginning and 368.0MB in the end (delta: -15.2MB). Peak memory consumption was 30.1MB. Max. memory is 16.0GB. * TraceAbstraction took 835291.55ms. Allocated memory was 392.2MB in the beginning and 7.2GB in the end (delta: 6.8GB). Free memory was 367.3MB in the beginning and 4.5GB in the end (delta: -4.2GB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 100 PlacesBefore, 21 PlacesAfterwards, 102 TransitionsBefore, 17 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 59 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 102 TotalNumberOfCompositions, 647 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 608, independent: 597, independent conditional: 0, independent unconditional: 597, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 302, independent: 297, independent conditional: 0, independent unconditional: 297, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 608, independent: 300, independent conditional: 0, independent unconditional: 300, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 302, unknown conditional: 0, unknown unconditional: 302] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: 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: 76]: 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 5 procedures, 126 locations, 3 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: 835.2s, OverallIterations: 87, TraceHistogramMax: 3, PathProgramHistogramMax: 82, EmptinessCheckTime: 0.0s, AutomataDifference: 659.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 24 mSolverCounterUnknown, 7777 SdHoareTripleChecker+Valid, 64.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7777 mSDsluCounter, 3999 SdHoareTripleChecker+Invalid, 58.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2740 IncrementalHoareTripleChecker+Unchecked, 3658 mSDsCounter, 2344 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 79725 IncrementalHoareTripleChecker+Invalid, 84833 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2344 mSolverCounterUnsat, 341 mSDtfsCounter, 79725 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6015 GetRequests, 1820 SyntacticMatches, 232 SemanticMatches, 3963 ConstructedPredicates, 23 IntricatePredicates, 0 DeprecatedPredicates, 62439 ImplicationChecksByTransitivity, 151.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=76280occurred in iteration=86, InterpolantAutomatonStates: 2381, 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: 1.1s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 140.3s InterpolantComputationTime, 3658 NumberOfCodeBlocks, 3658 NumberOfCodeBlocksAsserted, 284 NumberOfCheckSat, 5210 ConstructedInterpolants, 283 QuantifiedInterpolants, 108027 SizeOfPredicates, 2691 NumberOfNonLiveVariables, 22815 ConjunctsInSsa, 7135 ConjunctsInUnsatCore, 255 InterpolantComputations, 5 PerfectInterpolantSequences, 521/3515 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