/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 09:38:13,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 09:38:13,345 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 [2023-08-27 09:38:13,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 09:38:13,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 09:38:13,362 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 09:38:13,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 09:38:13,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 09:38:13,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 09:38:13,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 09:38:13,363 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 09:38:13,364 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 09:38:13,364 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 09:38:13,364 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 09:38:13,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 09:38:13,365 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 09:38:13,365 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 09:38:13,365 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 09:38:13,365 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 09:38:13,365 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 09:38:13,366 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 09:38:13,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 09:38:13,366 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 09:38:13,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 09:38:13,366 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 09:38:13,366 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 09:38:13,367 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 09:38:13,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:38:13,367 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 09:38:13,367 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 09:38:13,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 09:38:13,367 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 09:38:13,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 09:38:13,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 09:38:13,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 09:38:13,368 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 09:38:13,598 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 09:38:13,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 09:38:13,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 09:38:13,621 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 09:38:13,622 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 09:38:13,623 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2023-08-27 09:38:14,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 09:38:14,808 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 09:38:14,809 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2023-08-27 09:38:14,823 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31b1a89cd/377606ee2c0c48dfa7dfaee980fd87f5/FLAG3167b3bb1 [2023-08-27 09:38:14,834 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31b1a89cd/377606ee2c0c48dfa7dfaee980fd87f5 [2023-08-27 09:38:14,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 09:38:14,838 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 09:38:14,839 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 09:38:14,840 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 09:38:14,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 09:38:14,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:38:14" (1/1) ... [2023-08-27 09:38:14,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39a1ac57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:14, skipping insertion in model container [2023-08-27 09:38:14,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:38:14" (1/1) ... [2023-08-27 09:38:14,876 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 09:38:15,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:38:15,109 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 09:38:15,137 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-27 09:38:15,138 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-27 09:38:15,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 09:38:15,173 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 09:38:15,173 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 09:38:15,178 INFO L206 MainTranslator]: Completed translation [2023-08-27 09:38:15,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15 WrapperNode [2023-08-27 09:38:15,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 09:38:15,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 09:38:15,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 09:38:15,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 09:38:15,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,202 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-27 09:38:15,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 09:38:15,202 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 09:38:15,202 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 09:38:15,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 09:38:15,208 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,234 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 09:38:15,235 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 09:38:15,235 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 09:38:15,235 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 09:38:15,236 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (1/1) ... [2023-08-27 09:38:15,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 09:38:15,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:15,259 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) [2023-08-27 09:38:15,266 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 [2023-08-27 09:38:15,290 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-27 09:38:15,290 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-27 09:38:15,291 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 09:38:15,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 09:38:15,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 09:38:15,292 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 09:38:15,416 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 09:38:15,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 09:38:15,564 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 09:38:15,592 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 09:38:15,593 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-27 09:38:15,594 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:38:15 BoogieIcfgContainer [2023-08-27 09:38:15,594 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 09:38:15,596 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 09:38:15,596 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 09:38:15,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 09:38:15,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:38:14" (1/3) ... [2023-08-27 09:38:15,598 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195284c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:38:15, skipping insertion in model container [2023-08-27 09:38:15,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:38:15" (2/3) ... [2023-08-27 09:38:15,599 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195284c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:38:15, skipping insertion in model container [2023-08-27 09:38:15,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:38:15" (3/3) ... [2023-08-27 09:38:15,599 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2023-08-27 09:38:15,613 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 09:38:15,613 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 09:38:15,613 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 09:38:15,671 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-27 09:38:15,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 178 flow [2023-08-27 09:38:15,750 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-08-27 09:38:15,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:38:15,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 82 events. 6/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 157 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-27 09:38:15,755 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 178 flow [2023-08-27 09:38:15,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 82 transitions, 170 flow [2023-08-27 09:38:15,760 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 09:38:15,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 82 transitions, 170 flow [2023-08-27 09:38:15,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 82 transitions, 170 flow [2023-08-27 09:38:15,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 170 flow [2023-08-27 09:38:15,803 INFO L124 PetriNetUnfolderBase]: 6/82 cut-off events. [2023-08-27 09:38:15,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:38:15,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 82 events. 6/82 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 155 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 64. Up to 2 conditions per place. [2023-08-27 09:38:15,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 2304 [2023-08-27 09:38:17,827 INFO L134 LiptonReduction]: Checked pairs total: 2595 [2023-08-27 09:38:17,828 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-27 09:38:17,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 09:38:17,840 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;@23bc7c2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 09:38:17,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-27 09:38:17,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 09:38:17,847 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2023-08-27 09:38:17,847 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 09:38:17,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:17,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 09:38:17,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:17,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 10934624, now seen corresponding path program 1 times [2023-08-27 09:38:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:17,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584436221] [2023-08-27 09:38:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584436221] [2023-08-27 09:38:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584436221] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:18,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:38:18,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353140246] [2023-08-27 09:38:18,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:18,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:38:18,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:18,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:38:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:38:18,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 09:38:18,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:18,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 09:38:18,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:18,147 INFO L124 PetriNetUnfolderBase]: 415/650 cut-off events. [2023-08-27 09:38:18,147 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 09:38:18,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1316 conditions, 650 events. 415/650 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2587 event pairs, 159 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 1306. Up to 351 conditions per place. [2023-08-27 09:38:18,152 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 28 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-08-27 09:38:18,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 32 transitions, 134 flow [2023-08-27 09:38:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-27 09:38:18,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853801169590643 [2023-08-27 09:38:18,160 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-27 09:38:18,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-27 09:38:18,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:18,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-27 09:38:18,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,168 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 3 states and 249 transitions. [2023-08-27 09:38:18,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 32 transitions, 134 flow [2023-08-27 09:38:18,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 32 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:38:18,171 INFO L231 Difference]: Finished difference. Result has 26 places, 22 transitions, 72 flow [2023-08-27 09:38:18,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=26, PETRI_TRANSITIONS=22} [2023-08-27 09:38:18,174 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2023-08-27 09:38:18,174 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 22 transitions, 72 flow [2023-08-27 09:38:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:18,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 09:38:18,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 09:38:18,175 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:18,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:18,175 INFO L85 PathProgramCache]: Analyzing trace with hash 10934666, now seen corresponding path program 1 times [2023-08-27 09:38:18,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:18,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907977627] [2023-08-27 09:38:18,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:18,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:18,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:18,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907977627] [2023-08-27 09:38:18,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907977627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:18,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:18,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:38:18,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330864536] [2023-08-27 09:38:18,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:18,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:38:18,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:18,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:38:18,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:38:18,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:18,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:18,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:18,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:18,352 INFO L124 PetriNetUnfolderBase]: 601/944 cut-off events. [2023-08-27 09:38:18,353 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-27 09:38:18,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 944 events. 601/944 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 4286 event pairs, 309 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 2246. Up to 651 conditions per place. [2023-08-27 09:38:18,359 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-27 09:38:18,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 206 flow [2023-08-27 09:38:18,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:18,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 236 transitions. [2023-08-27 09:38:18,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600389863547758 [2023-08-27 09:38:18,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 236 transitions. [2023-08-27 09:38:18,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 236 transitions. [2023-08-27 09:38:18,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:18,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 236 transitions. [2023-08-27 09:38:18,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,369 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 72 flow. Second operand 3 states and 236 transitions. [2023-08-27 09:38:18,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 206 flow [2023-08-27 09:38:18,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:38:18,372 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 78 flow [2023-08-27 09:38:18,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-27 09:38:18,373 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-27 09:38:18,373 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 78 flow [2023-08-27 09:38:18,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:18,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 09:38:18,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 09:38:18,377 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:18,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:18,382 INFO L85 PathProgramCache]: Analyzing trace with hash 10934625, now seen corresponding path program 1 times [2023-08-27 09:38:18,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:18,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891951944] [2023-08-27 09:38:18,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:18,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:18,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891951944] [2023-08-27 09:38:18,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891951944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:18,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:18,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:38:18,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238503026] [2023-08-27 09:38:18,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:18,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:38:18,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:18,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:38:18,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:38:18,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 09:38:18,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:18,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 09:38:18,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:18,482 INFO L124 PetriNetUnfolderBase]: 581/952 cut-off events. [2023-08-27 09:38:18,483 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-27 09:38:18,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2398 conditions, 952 events. 581/952 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4441 event pairs, 198 based on Foata normal form. 44/566 useless extension candidates. Maximal degree in co-relation 2386. Up to 582 conditions per place. [2023-08-27 09:38:18,486 INFO L140 encePairwiseOnDemand]: 166/171 looper letters, 31 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2023-08-27 09:38:18,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 198 flow [2023-08-27 09:38:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:18,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:18,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-27 09:38:18,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47173489278752434 [2023-08-27 09:38:18,487 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-27 09:38:18,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-27 09:38:18,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:18,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-27 09:38:18,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,489 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,489 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 78 flow. Second operand 3 states and 242 transitions. [2023-08-27 09:38:18,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 198 flow [2023-08-27 09:38:18,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 37 transitions, 194 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:18,490 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 114 flow [2023-08-27 09:38:18,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-27 09:38:18,491 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2023-08-27 09:38:18,491 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 114 flow [2023-08-27 09:38:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:18,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 09:38:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 09:38:18,492 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:18,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 338975209, now seen corresponding path program 1 times [2023-08-27 09:38:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:18,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895030472] [2023-08-27 09:38:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:18,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:18,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895030472] [2023-08-27 09:38:18,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895030472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:18,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831572194] [2023-08-27 09:38:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:18,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:18,531 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) [2023-08-27 09:38:18,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 09:38:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:18,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:38:18,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:18,624 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:38:18,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831572194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:18,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 09:38:18,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 09:38:18,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768769015] [2023-08-27 09:38:18,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:18,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:38:18,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:38:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:38:18,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:18,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:18,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:18,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:18,722 INFO L124 PetriNetUnfolderBase]: 505/834 cut-off events. [2023-08-27 09:38:18,722 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2023-08-27 09:38:18,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2278 conditions, 834 events. 505/834 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3981 event pairs, 95 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 2264. Up to 340 conditions per place. [2023-08-27 09:38:18,725 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 54 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-27 09:38:18,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 57 transitions, 353 flow [2023-08-27 09:38:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:38:18,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:38:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 312 transitions. [2023-08-27 09:38:18,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2023-08-27 09:38:18,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 312 transitions. [2023-08-27 09:38:18,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 312 transitions. [2023-08-27 09:38:18,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:18,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 312 transitions. [2023-08-27 09:38:18,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,729 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,729 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 114 flow. Second operand 4 states and 312 transitions. [2023-08-27 09:38:18,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 57 transitions, 353 flow [2023-08-27 09:38:18,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 57 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:18,730 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 110 flow [2023-08-27 09:38:18,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-27 09:38:18,731 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2023-08-27 09:38:18,731 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 110 flow [2023-08-27 09:38:18,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:18,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:18,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 09:38:18,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 09:38:18,936 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 [2023-08-27 09:38:18,936 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:18,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1919052570, now seen corresponding path program 1 times [2023-08-27 09:38:18,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:18,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496432659] [2023-08-27 09:38:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:18,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:18,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:19,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:19,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496432659] [2023-08-27 09:38:19,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496432659] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:19,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:38:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016389029] [2023-08-27 09:38:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:38:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:38:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:38:19,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:19,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:19,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:19,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:19,179 INFO L124 PetriNetUnfolderBase]: 441/738 cut-off events. [2023-08-27 09:38:19,179 INFO L125 PetriNetUnfolderBase]: For 497/497 co-relation queries the response was YES. [2023-08-27 09:38:19,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2092 conditions, 738 events. 441/738 cut-off events. For 497/497 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3325 event pairs, 115 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 2078. Up to 605 conditions per place. [2023-08-27 09:38:19,182 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 34 selfloop transitions, 6 changer transitions 2/42 dead transitions. [2023-08-27 09:38:19,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 264 flow [2023-08-27 09:38:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:38:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:38:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 294 transitions. [2023-08-27 09:38:19,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-27 09:38:19,183 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 294 transitions. [2023-08-27 09:38:19,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 294 transitions. [2023-08-27 09:38:19,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:19,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 294 transitions. [2023-08-27 09:38:19,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.5) internal successors, (294), 4 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,186 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 110 flow. Second operand 4 states and 294 transitions. [2023-08-27 09:38:19,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 264 flow [2023-08-27 09:38:19,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:38:19,187 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 147 flow [2023-08-27 09:38:19,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-27 09:38:19,189 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2023-08-27 09:38:19,189 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 147 flow [2023-08-27 09:38:19,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:19,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 09:38:19,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 09:38:19,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:19,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1919051912, now seen corresponding path program 1 times [2023-08-27 09:38:19,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:19,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212963637] [2023-08-27 09:38:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:19,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:19,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:19,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:19,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212963637] [2023-08-27 09:38:19,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212963637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:19,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:19,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:38:19,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915420431] [2023-08-27 09:38:19,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:19,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:38:19,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:19,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:38:19,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:38:19,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 09:38:19,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:19,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 09:38:19,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:19,280 INFO L124 PetriNetUnfolderBase]: 409/692 cut-off events. [2023-08-27 09:38:19,280 INFO L125 PetriNetUnfolderBase]: For 503/503 co-relation queries the response was YES. [2023-08-27 09:38:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 692 events. 409/692 cut-off events. For 503/503 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3253 event pairs, 121 based on Foata normal form. 0/602 useless extension candidates. Maximal degree in co-relation 2193. Up to 370 conditions per place. [2023-08-27 09:38:19,283 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 47 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-27 09:38:19,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 51 transitions, 372 flow [2023-08-27 09:38:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:19,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 243 transitions. [2023-08-27 09:38:19,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2023-08-27 09:38:19,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 243 transitions. [2023-08-27 09:38:19,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 243 transitions. [2023-08-27 09:38:19,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:19,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 243 transitions. [2023-08-27 09:38:19,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,287 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 147 flow. Second operand 3 states and 243 transitions. [2023-08-27 09:38:19,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 51 transitions, 372 flow [2023-08-27 09:38:19,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 51 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:19,292 INFO L231 Difference]: Finished difference. Result has 36 places, 30 transitions, 174 flow [2023-08-27 09:38:19,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2023-08-27 09:38:19,293 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2023-08-27 09:38:19,294 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 174 flow [2023-08-27 09:38:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:19,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:19,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 09:38:19,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:19,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash -638931166, now seen corresponding path program 1 times [2023-08-27 09:38:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:19,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469643015] [2023-08-27 09:38:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:19,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:19,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469643015] [2023-08-27 09:38:19,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469643015] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:19,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619065454] [2023-08-27 09:38:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:19,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:19,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:19,330 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) [2023-08-27 09:38:19,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 09:38:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:38:19,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:19,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 09:38:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619065454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:19,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 09:38:19,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 09:38:19,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264876977] [2023-08-27 09:38:19,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:38:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:38:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:38:19,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:19,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:19,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:19,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:19,458 INFO L124 PetriNetUnfolderBase]: 329/564 cut-off events. [2023-08-27 09:38:19,459 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2023-08-27 09:38:19,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 564 events. 329/564 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2497 event pairs, 107 based on Foata normal form. 0/564 useless extension candidates. Maximal degree in co-relation 1899. Up to 330 conditions per place. [2023-08-27 09:38:19,461 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 37 selfloop transitions, 4 changer transitions 1/42 dead transitions. [2023-08-27 09:38:19,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 42 transitions, 306 flow [2023-08-27 09:38:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 09:38:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 09:38:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 303 transitions. [2023-08-27 09:38:19,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44298245614035087 [2023-08-27 09:38:19,462 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 303 transitions. [2023-08-27 09:38:19,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 303 transitions. [2023-08-27 09:38:19,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:19,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 303 transitions. [2023-08-27 09:38:19,463 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 75.75) internal successors, (303), 4 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) [2023-08-27 09:38:19,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,464 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,464 INFO L175 Difference]: Start difference. First operand has 36 places, 30 transitions, 174 flow. Second operand 4 states and 303 transitions. [2023-08-27 09:38:19,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 42 transitions, 306 flow [2023-08-27 09:38:19,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 294 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 09:38:19,466 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 140 flow [2023-08-27 09:38:19,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-08-27 09:38:19,466 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 10 predicate places. [2023-08-27 09:38:19,466 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 140 flow [2023-08-27 09:38:19,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:19,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:19,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:19,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-27 09:38:19,671 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:19,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -638931208, now seen corresponding path program 1 times [2023-08-27 09:38:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:19,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085133102] [2023-08-27 09:38:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:19,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:19,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:19,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085133102] [2023-08-27 09:38:19,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085133102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:19,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:19,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 09:38:19,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665282228] [2023-08-27 09:38:19,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:19,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:38:19,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:38:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:38:19,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 09:38:19,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:19,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 09:38:19,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:19,748 INFO L124 PetriNetUnfolderBase]: 291/512 cut-off events. [2023-08-27 09:38:19,748 INFO L125 PetriNetUnfolderBase]: For 664/664 co-relation queries the response was YES. [2023-08-27 09:38:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1739 conditions, 512 events. 291/512 cut-off events. For 664/664 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2308 event pairs, 77 based on Foata normal form. 24/536 useless extension candidates. Maximal degree in co-relation 1720. Up to 304 conditions per place. [2023-08-27 09:38:19,750 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 37 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-08-27 09:38:19,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 303 flow [2023-08-27 09:38:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:19,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2023-08-27 09:38:19,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2023-08-27 09:38:19,752 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2023-08-27 09:38:19,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2023-08-27 09:38:19,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:19,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2023-08-27 09:38:19,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,754 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 140 flow. Second operand 3 states and 240 transitions. [2023-08-27 09:38:19,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 303 flow [2023-08-27 09:38:19,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 41 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:19,756 INFO L231 Difference]: Finished difference. Result has 38 places, 25 transitions, 150 flow [2023-08-27 09:38:19,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=38, PETRI_TRANSITIONS=25} [2023-08-27 09:38:19,758 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2023-08-27 09:38:19,758 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 25 transitions, 150 flow [2023-08-27 09:38:19,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:19,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:19,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 09:38:19,758 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:19,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash 928422853, now seen corresponding path program 1 times [2023-08-27 09:38:19,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:19,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738693070] [2023-08-27 09:38:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:19,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738693070] [2023-08-27 09:38:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738693070] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:19,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:19,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:38:19,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376305501] [2023-08-27 09:38:19,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:19,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:38:19,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:38:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:38:19,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:19,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 25 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:19,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:19,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:19,888 INFO L124 PetriNetUnfolderBase]: 359/624 cut-off events. [2023-08-27 09:38:19,888 INFO L125 PetriNetUnfolderBase]: For 999/999 co-relation queries the response was YES. [2023-08-27 09:38:19,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2157 conditions, 624 events. 359/624 cut-off events. For 999/999 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2844 event pairs, 104 based on Foata normal form. 38/662 useless extension candidates. Maximal degree in co-relation 2136. Up to 296 conditions per place. [2023-08-27 09:38:19,891 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 46 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2023-08-27 09:38:19,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 420 flow [2023-08-27 09:38:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 09:38:19,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 09:38:19,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 382 transitions. [2023-08-27 09:38:19,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44678362573099417 [2023-08-27 09:38:19,893 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 382 transitions. [2023-08-27 09:38:19,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 382 transitions. [2023-08-27 09:38:19,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:19,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 382 transitions. [2023-08-27 09:38:19,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.4) internal successors, (382), 5 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,895 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,895 INFO L175 Difference]: Start difference. First operand has 38 places, 25 transitions, 150 flow. Second operand 5 states and 382 transitions. [2023-08-27 09:38:19,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 420 flow [2023-08-27 09:38:19,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 56 transitions, 406 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:19,896 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 254 flow [2023-08-27 09:38:19,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2023-08-27 09:38:19,897 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-08-27 09:38:19,897 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 254 flow [2023-08-27 09:38:19,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:19,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:19,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 09:38:19,897 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:19,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash 928422549, now seen corresponding path program 1 times [2023-08-27 09:38:19,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:19,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142353230] [2023-08-27 09:38:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:19,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142353230] [2023-08-27 09:38:19,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142353230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:19,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:19,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:38:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382444116] [2023-08-27 09:38:19,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:19,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:38:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:19,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:38:19,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:38:19,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:19,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:19,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:19,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:19,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:20,004 INFO L124 PetriNetUnfolderBase]: 431/728 cut-off events. [2023-08-27 09:38:20,005 INFO L125 PetriNetUnfolderBase]: For 1752/1752 co-relation queries the response was YES. [2023-08-27 09:38:20,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 728 events. 431/728 cut-off events. For 1752/1752 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3262 event pairs, 82 based on Foata normal form. 32/760 useless extension candidates. Maximal degree in co-relation 2758. Up to 386 conditions per place. [2023-08-27 09:38:20,009 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 52 selfloop transitions, 13 changer transitions 0/65 dead transitions. [2023-08-27 09:38:20,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 547 flow [2023-08-27 09:38:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 09:38:20,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 09:38:20,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 384 transitions. [2023-08-27 09:38:20,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44912280701754387 [2023-08-27 09:38:20,010 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 384 transitions. [2023-08-27 09:38:20,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 384 transitions. [2023-08-27 09:38:20,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:20,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 384 transitions. [2023-08-27 09:38:20,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 76.8) internal successors, (384), 5 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,012 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,013 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 254 flow. Second operand 5 states and 384 transitions. [2023-08-27 09:38:20,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 547 flow [2023-08-27 09:38:20,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 547 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 09:38:20,016 INFO L231 Difference]: Finished difference. Result has 52 places, 40 transitions, 364 flow [2023-08-27 09:38:20,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=364, PETRI_PLACES=52, PETRI_TRANSITIONS=40} [2023-08-27 09:38:20,017 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 26 predicate places. [2023-08-27 09:38:20,017 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 40 transitions, 364 flow [2023-08-27 09:38:20,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:20,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:20,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 09:38:20,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:20,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 928422548, now seen corresponding path program 1 times [2023-08-27 09:38:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700125305] [2023-08-27 09:38:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700125305] [2023-08-27 09:38:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700125305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:20,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:20,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:38:20,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016595286] [2023-08-27 09:38:20,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:20,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 09:38:20,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 09:38:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 09:38:20,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:20,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 40 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:20,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:20,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:20,095 INFO L124 PetriNetUnfolderBase]: 288/485 cut-off events. [2023-08-27 09:38:20,095 INFO L125 PetriNetUnfolderBase]: For 2152/2152 co-relation queries the response was YES. [2023-08-27 09:38:20,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 485 events. 288/485 cut-off events. For 2152/2152 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1858 event pairs, 163 based on Foata normal form. 64/549 useless extension candidates. Maximal degree in co-relation 1934. Up to 485 conditions per place. [2023-08-27 09:38:20,098 INFO L140 encePairwiseOnDemand]: 168/171 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 09:38:20,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 31 transitions, 324 flow [2023-08-27 09:38:20,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:20,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 218 transitions. [2023-08-27 09:38:20,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4249512670565302 [2023-08-27 09:38:20,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 218 transitions. [2023-08-27 09:38:20,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 218 transitions. [2023-08-27 09:38:20,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:20,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 218 transitions. [2023-08-27 09:38:20,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,100 INFO L175 Difference]: Start difference. First operand has 52 places, 40 transitions, 364 flow. Second operand 3 states and 218 transitions. [2023-08-27 09:38:20,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 31 transitions, 324 flow [2023-08-27 09:38:20,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 31 transitions, 286 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-27 09:38:20,104 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 226 flow [2023-08-27 09:38:20,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-08-27 09:38:20,104 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2023-08-27 09:38:20,104 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 226 flow [2023-08-27 09:38:20,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:20,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:20,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 09:38:20,105 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:20,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1668520394, now seen corresponding path program 1 times [2023-08-27 09:38:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:20,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509386642] [2023-08-27 09:38:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:20,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509386642] [2023-08-27 09:38:20,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509386642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:20,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:20,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:38:20,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803095252] [2023-08-27 09:38:20,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:20,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:38:20,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:38:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:38:20,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:20,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 226 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:20,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:20,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:20,248 INFO L124 PetriNetUnfolderBase]: 331/581 cut-off events. [2023-08-27 09:38:20,248 INFO L125 PetriNetUnfolderBase]: For 1400/1400 co-relation queries the response was YES. [2023-08-27 09:38:20,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 581 events. 331/581 cut-off events. For 1400/1400 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2575 event pairs, 71 based on Foata normal form. 20/601 useless extension candidates. Maximal degree in co-relation 2123. Up to 365 conditions per place. [2023-08-27 09:38:20,250 INFO L140 encePairwiseOnDemand]: 164/171 looper letters, 51 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2023-08-27 09:38:20,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 585 flow [2023-08-27 09:38:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 09:38:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 09:38:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 429 transitions. [2023-08-27 09:38:20,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41812865497076024 [2023-08-27 09:38:20,252 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 429 transitions. [2023-08-27 09:38:20,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 429 transitions. [2023-08-27 09:38:20,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:20,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 429 transitions. [2023-08-27 09:38:20,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.5) internal successors, (429), 6 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,255 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,256 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 226 flow. Second operand 6 states and 429 transitions. [2023-08-27 09:38:20,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 585 flow [2023-08-27 09:38:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 69 transitions, 584 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:20,258 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 434 flow [2023-08-27 09:38:20,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=434, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2023-08-27 09:38:20,259 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-08-27 09:38:20,259 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 434 flow [2023-08-27 09:38:20,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:20,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:20,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 09:38:20,260 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:20,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:20,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1667969834, now seen corresponding path program 2 times [2023-08-27 09:38:20,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:20,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021337885] [2023-08-27 09:38:20,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:20,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021337885] [2023-08-27 09:38:20,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021337885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:20,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:20,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 09:38:20,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136881227] [2023-08-27 09:38:20,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:20,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 09:38:20,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:20,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 09:38:20,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-27 09:38:20,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:20,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:20,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:20,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:20,407 INFO L124 PetriNetUnfolderBase]: 335/581 cut-off events. [2023-08-27 09:38:20,407 INFO L125 PetriNetUnfolderBase]: For 2037/2037 co-relation queries the response was YES. [2023-08-27 09:38:20,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2594 conditions, 581 events. 335/581 cut-off events. For 2037/2037 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2518 event pairs, 84 based on Foata normal form. 12/593 useless extension candidates. Maximal degree in co-relation 2566. Up to 361 conditions per place. [2023-08-27 09:38:20,410 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 50 selfloop transitions, 17 changer transitions 1/68 dead transitions. [2023-08-27 09:38:20,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 707 flow [2023-08-27 09:38:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 09:38:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 09:38:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 357 transitions. [2023-08-27 09:38:20,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41754385964912283 [2023-08-27 09:38:20,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 357 transitions. [2023-08-27 09:38:20,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 357 transitions. [2023-08-27 09:38:20,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:20,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 357 transitions. [2023-08-27 09:38:20,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 71.4) internal successors, (357), 5 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,414 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,414 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 434 flow. Second operand 5 states and 357 transitions. [2023-08-27 09:38:20,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 707 flow [2023-08-27 09:38:20,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 705 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-27 09:38:20,418 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 528 flow [2023-08-27 09:38:20,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2023-08-27 09:38:20,419 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-27 09:38:20,420 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 528 flow [2023-08-27 09:38:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 65.6) internal successors, (328), 5 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:20,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:20,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 09:38:20,420 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:20,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1283660965, now seen corresponding path program 1 times [2023-08-27 09:38:20,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:20,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273300061] [2023-08-27 09:38:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:20,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:20,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273300061] [2023-08-27 09:38:20,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273300061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:20,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:20,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 09:38:20,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572991352] [2023-08-27 09:38:20,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:20,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 09:38:20,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:20,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 09:38:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 09:38:20,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 171 [2023-08-27 09:38:20,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:20,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 171 [2023-08-27 09:38:20,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:20,507 INFO L124 PetriNetUnfolderBase]: 421/717 cut-off events. [2023-08-27 09:38:20,507 INFO L125 PetriNetUnfolderBase]: For 3734/3734 co-relation queries the response was YES. [2023-08-27 09:38:20,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3448 conditions, 717 events. 421/717 cut-off events. For 3734/3734 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3172 event pairs, 98 based on Foata normal form. 40/757 useless extension candidates. Maximal degree in co-relation 3415. Up to 434 conditions per place. [2023-08-27 09:38:20,512 INFO L140 encePairwiseOnDemand]: 167/171 looper letters, 46 selfloop transitions, 21 changer transitions 0/67 dead transitions. [2023-08-27 09:38:20,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 818 flow [2023-08-27 09:38:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 09:38:20,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 09:38:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-27 09:38:20,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4619883040935672 [2023-08-27 09:38:20,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-27 09:38:20,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-27 09:38:20,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:20,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-27 09:38:20,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,515 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 528 flow. Second operand 3 states and 237 transitions. [2023-08-27 09:38:20,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 818 flow [2023-08-27 09:38:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 67 transitions, 798 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 09:38:20,521 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 698 flow [2023-08-27 09:38:20,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=698, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2023-08-27 09:38:20,522 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 36 predicate places. [2023-08-27 09:38:20,522 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 698 flow [2023-08-27 09:38:20,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:20,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:20,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 09:38:20,523 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:20,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:20,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1283660960, now seen corresponding path program 1 times [2023-08-27 09:38:20,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:20,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874378374] [2023-08-27 09:38:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:20,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:20,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874378374] [2023-08-27 09:38:20,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874378374] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:20,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274538806] [2023-08-27 09:38:20,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:20,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:20,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:20,568 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) [2023-08-27 09:38:20,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 09:38:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:20,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 09:38:20,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:20,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,642 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274538806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:20,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:20,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 09:38:20,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787081795] [2023-08-27 09:38:20,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 09:38:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 09:38:20,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-27 09:38:20,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:20,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 69.25) internal successors, (554), 8 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) [2023-08-27 09:38:20,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:20,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:20,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:20,798 INFO L124 PetriNetUnfolderBase]: 477/806 cut-off events. [2023-08-27 09:38:20,798 INFO L125 PetriNetUnfolderBase]: For 4849/4849 co-relation queries the response was YES. [2023-08-27 09:38:20,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4019 conditions, 806 events. 477/806 cut-off events. For 4849/4849 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3417 event pairs, 55 based on Foata normal form. 90/896 useless extension candidates. Maximal degree in co-relation 3984. Up to 273 conditions per place. [2023-08-27 09:38:20,803 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 65 selfloop transitions, 33 changer transitions 1/99 dead transitions. [2023-08-27 09:38:20,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 1212 flow [2023-08-27 09:38:20,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 09:38:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 09:38:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 667 transitions. [2023-08-27 09:38:20,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.433398310591293 [2023-08-27 09:38:20,809 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 667 transitions. [2023-08-27 09:38:20,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 667 transitions. [2023-08-27 09:38:20,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:20,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 667 transitions. [2023-08-27 09:38:20,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 74.11111111111111) internal successors, (667), 9 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,813 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:20,813 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 698 flow. Second operand 9 states and 667 transitions. [2023-08-27 09:38:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 1212 flow [2023-08-27 09:38:20,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 1152 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-27 09:38:20,824 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 881 flow [2023-08-27 09:38:20,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=558, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2023-08-27 09:38:20,825 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 49 predicate places. [2023-08-27 09:38:20,825 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 881 flow [2023-08-27 09:38:20,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 69.25) internal successors, (554), 8 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) [2023-08-27 09:38:20,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:20,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:20,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:21,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:21,030 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:21,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1157182881, now seen corresponding path program 1 times [2023-08-27 09:38:21,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:21,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912440019] [2023-08-27 09:38:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:21,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:21,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912440019] [2023-08-27 09:38:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912440019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:21,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:21,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 09:38:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734675262] [2023-08-27 09:38:21,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:21,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 09:38:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 09:38:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-27 09:38:21,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:21,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 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) [2023-08-27 09:38:21,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:21,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:21,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:21,290 INFO L124 PetriNetUnfolderBase]: 501/846 cut-off events. [2023-08-27 09:38:21,290 INFO L125 PetriNetUnfolderBase]: For 6284/6284 co-relation queries the response was YES. [2023-08-27 09:38:21,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4667 conditions, 846 events. 501/846 cut-off events. For 6284/6284 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3654 event pairs, 111 based on Foata normal form. 8/854 useless extension candidates. Maximal degree in co-relation 4625. Up to 483 conditions per place. [2023-08-27 09:38:21,295 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 63 selfloop transitions, 36 changer transitions 1/100 dead transitions. [2023-08-27 09:38:21,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 100 transitions, 1380 flow [2023-08-27 09:38:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 09:38:21,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 09:38:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 564 transitions. [2023-08-27 09:38:21,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2023-08-27 09:38:21,297 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 564 transitions. [2023-08-27 09:38:21,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 564 transitions. [2023-08-27 09:38:21,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:21,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 564 transitions. [2023-08-27 09:38:21,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.5) internal successors, (564), 8 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,299 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 171.0) internal successors, (1539), 9 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,299 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 881 flow. Second operand 8 states and 564 transitions. [2023-08-27 09:38:21,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 100 transitions, 1380 flow [2023-08-27 09:38:21,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 1340 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-08-27 09:38:21,310 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 1094 flow [2023-08-27 09:38:21,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1094, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2023-08-27 09:38:21,310 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 60 predicate places. [2023-08-27 09:38:21,310 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 1094 flow [2023-08-27 09:38:21,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 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) [2023-08-27 09:38:21,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:21,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:21,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 09:38:21,311 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:21,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1157208921, now seen corresponding path program 2 times [2023-08-27 09:38:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:21,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668599789] [2023-08-27 09:38:21,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:21,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:21,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:21,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668599789] [2023-08-27 09:38:21,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668599789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:21,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:21,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 09:38:21,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844499078] [2023-08-27 09:38:21,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:21,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 09:38:21,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:21,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 09:38:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-27 09:38:21,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:21,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 1094 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 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) [2023-08-27 09:38:21,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:21,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:21,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:21,495 INFO L124 PetriNetUnfolderBase]: 493/830 cut-off events. [2023-08-27 09:38:21,495 INFO L125 PetriNetUnfolderBase]: For 8266/8266 co-relation queries the response was YES. [2023-08-27 09:38:21,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 830 events. 493/830 cut-off events. For 8266/8266 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3547 event pairs, 115 based on Foata normal form. 8/838 useless extension candidates. Maximal degree in co-relation 4945. Up to 471 conditions per place. [2023-08-27 09:38:21,500 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 60 selfloop transitions, 33 changer transitions 5/98 dead transitions. [2023-08-27 09:38:21,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 98 transitions, 1512 flow [2023-08-27 09:38:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 09:38:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 09:38:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 493 transitions. [2023-08-27 09:38:21,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118629908103592 [2023-08-27 09:38:21,501 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 493 transitions. [2023-08-27 09:38:21,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 493 transitions. [2023-08-27 09:38:21,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:21,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 493 transitions. [2023-08-27 09:38:21,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,504 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,504 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 1094 flow. Second operand 7 states and 493 transitions. [2023-08-27 09:38:21,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 98 transitions, 1512 flow [2023-08-27 09:38:21,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 98 transitions, 1480 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-27 09:38:21,518 INFO L231 Difference]: Finished difference. Result has 93 places, 76 transitions, 1220 flow [2023-08-27 09:38:21,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1062, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=93, PETRI_TRANSITIONS=76} [2023-08-27 09:38:21,518 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 67 predicate places. [2023-08-27 09:38:21,518 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 76 transitions, 1220 flow [2023-08-27 09:38:21,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 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) [2023-08-27 09:38:21,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:21,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:21,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-27 09:38:21,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:21,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:21,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1139071749, now seen corresponding path program 3 times [2023-08-27 09:38:21,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:21,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884484466] [2023-08-27 09:38:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:21,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:21,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:21,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884484466] [2023-08-27 09:38:21,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884484466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 09:38:21,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 09:38:21,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 09:38:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246977757] [2023-08-27 09:38:21,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 09:38:21,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 09:38:21,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:21,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 09:38:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 09:38:21,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:21,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 76 transitions, 1220 flow. Second operand has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 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) [2023-08-27 09:38:21,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:21,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:21,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:21,725 INFO L124 PetriNetUnfolderBase]: 509/858 cut-off events. [2023-08-27 09:38:21,725 INFO L125 PetriNetUnfolderBase]: For 10709/10709 co-relation queries the response was YES. [2023-08-27 09:38:21,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5461 conditions, 858 events. 509/858 cut-off events. For 10709/10709 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3730 event pairs, 188 based on Foata normal form. 4/862 useless extension candidates. Maximal degree in co-relation 5409. Up to 699 conditions per place. [2023-08-27 09:38:21,731 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 75 selfloop transitions, 20 changer transitions 4/99 dead transitions. [2023-08-27 09:38:21,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 99 transitions, 1624 flow [2023-08-27 09:38:21,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 09:38:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 09:38:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 493 transitions. [2023-08-27 09:38:21,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118629908103592 [2023-08-27 09:38:21,733 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 493 transitions. [2023-08-27 09:38:21,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 493 transitions. [2023-08-27 09:38:21,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:21,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 493 transitions. [2023-08-27 09:38:21,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,736 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:21,736 INFO L175 Difference]: Start difference. First operand has 93 places, 76 transitions, 1220 flow. Second operand 7 states and 493 transitions. [2023-08-27 09:38:21,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 99 transitions, 1624 flow [2023-08-27 09:38:21,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 99 transitions, 1570 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-27 09:38:21,752 INFO L231 Difference]: Finished difference. Result has 97 places, 82 transitions, 1323 flow [2023-08-27 09:38:21,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1323, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2023-08-27 09:38:21,752 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 71 predicate places. [2023-08-27 09:38:21,752 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 1323 flow [2023-08-27 09:38:21,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.66666666666667) internal successors, (394), 6 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) [2023-08-27 09:38:21,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:21,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:21,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 09:38:21,753 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:21,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash -942512378, now seen corresponding path program 4 times [2023-08-27 09:38:21,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:21,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857632472] [2023-08-27 09:38:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:21,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:21,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:21,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857632472] [2023-08-27 09:38:21,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857632472] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:21,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793186868] [2023-08-27 09:38:21,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:38:21,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:21,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:21,866 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) [2023-08-27 09:38:21,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 09:38:21,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:38:21,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:21,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 09:38:21,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:21,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:22,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793186868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:22,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 09:38:22,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787762392] [2023-08-27 09:38:22,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:22,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 09:38:22,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:22,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 09:38:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2023-08-27 09:38:22,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:22,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 1323 flow. Second operand has 13 states, 13 states have (on average 65.84615384615384) internal successors, (856), 13 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) [2023-08-27 09:38:22,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:22,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:22,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:22,320 INFO L124 PetriNetUnfolderBase]: 701/1190 cut-off events. [2023-08-27 09:38:22,321 INFO L125 PetriNetUnfolderBase]: For 15470/15470 co-relation queries the response was YES. [2023-08-27 09:38:22,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7378 conditions, 1190 events. 701/1190 cut-off events. For 15470/15470 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5436 event pairs, 113 based on Foata normal form. 88/1278 useless extension candidates. Maximal degree in co-relation 7323. Up to 429 conditions per place. [2023-08-27 09:38:22,328 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 81 selfloop transitions, 58 changer transitions 20/159 dead transitions. [2023-08-27 09:38:22,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 2439 flow [2023-08-27 09:38:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 09:38:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 09:38:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1052 transitions. [2023-08-27 09:38:22,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101364522417154 [2023-08-27 09:38:22,331 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1052 transitions. [2023-08-27 09:38:22,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1052 transitions. [2023-08-27 09:38:22,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:22,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1052 transitions. [2023-08-27 09:38:22,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 70.13333333333334) internal successors, (1052), 15 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:22,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 171.0) internal successors, (2736), 16 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:22,336 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 171.0) internal successors, (2736), 16 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:22,336 INFO L175 Difference]: Start difference. First operand has 97 places, 82 transitions, 1323 flow. Second operand 15 states and 1052 transitions. [2023-08-27 09:38:22,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 2439 flow [2023-08-27 09:38:22,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 159 transitions, 2391 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-27 09:38:22,361 INFO L231 Difference]: Finished difference. Result has 116 places, 107 transitions, 1909 flow [2023-08-27 09:38:22,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1909, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2023-08-27 09:38:22,361 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 90 predicate places. [2023-08-27 09:38:22,362 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 1909 flow [2023-08-27 09:38:22,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 65.84615384615384) internal successors, (856), 13 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) [2023-08-27 09:38:22,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:22,362 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:22,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:22,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:22,567 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:22,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash 476518742, now seen corresponding path program 2 times [2023-08-27 09:38:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043694326] [2023-08-27 09:38:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:22,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:22,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:22,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043694326] [2023-08-27 09:38:22,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043694326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:22,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250625888] [2023-08-27 09:38:22,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:38:22,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:22,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:22,626 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) [2023-08-27 09:38:22,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 09:38:22,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:38:22,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:22,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 09:38:22,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:22,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:22,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250625888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:22,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:22,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 09:38:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078749981] [2023-08-27 09:38:22,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 09:38:22,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:22,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 09:38:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 09:38:22,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:22,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 1909 flow. Second operand has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:22,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:22,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:23,154 INFO L124 PetriNetUnfolderBase]: 1093/1838 cut-off events. [2023-08-27 09:38:23,154 INFO L125 PetriNetUnfolderBase]: For 32117/32117 co-relation queries the response was YES. [2023-08-27 09:38:23,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12647 conditions, 1838 events. 1093/1838 cut-off events. For 32117/32117 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8621 event pairs, 89 based on Foata normal form. 88/1926 useless extension candidates. Maximal degree in co-relation 12583. Up to 685 conditions per place. [2023-08-27 09:38:23,165 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 133 selfloop transitions, 106 changer transitions 8/247 dead transitions. [2023-08-27 09:38:23,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 247 transitions, 4534 flow [2023-08-27 09:38:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 09:38:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 09:38:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1258 transitions. [2023-08-27 09:38:23,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327485380116959 [2023-08-27 09:38:23,169 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1258 transitions. [2023-08-27 09:38:23,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1258 transitions. [2023-08-27 09:38:23,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:23,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1258 transitions. [2023-08-27 09:38:23,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 74.0) internal successors, (1258), 17 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:23,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:23,178 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:23,178 INFO L175 Difference]: Start difference. First operand has 116 places, 107 transitions, 1909 flow. Second operand 17 states and 1258 transitions. [2023-08-27 09:38:23,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 247 transitions, 4534 flow [2023-08-27 09:38:23,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 247 transitions, 4222 flow, removed 126 selfloop flow, removed 7 redundant places. [2023-08-27 09:38:23,233 INFO L231 Difference]: Finished difference. Result has 135 places, 164 transitions, 3282 flow [2023-08-27 09:38:23,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3282, PETRI_PLACES=135, PETRI_TRANSITIONS=164} [2023-08-27 09:38:23,233 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 109 predicate places. [2023-08-27 09:38:23,233 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 164 transitions, 3282 flow [2023-08-27 09:38:23,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 68.85714285714286) internal successors, (964), 14 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:23,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:23,236 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:23,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 09:38:23,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:23,442 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:23,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:23,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1951786727, now seen corresponding path program 5 times [2023-08-27 09:38:23,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:23,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056916340] [2023-08-27 09:38:23,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:23,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:23,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056916340] [2023-08-27 09:38:23,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056916340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:23,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421723132] [2023-08-27 09:38:23,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:38:23,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:23,547 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) [2023-08-27 09:38:23,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 09:38:23,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 09:38:23,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:23,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:38:23,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:23,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:23,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:23,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421723132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:23,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:23,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 09:38:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304191574] [2023-08-27 09:38:23,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:23,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 09:38:23,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 09:38:23,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-27 09:38:23,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:23,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 164 transitions, 3282 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:23,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:23,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:23,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:24,241 INFO L124 PetriNetUnfolderBase]: 1377/2350 cut-off events. [2023-08-27 09:38:24,241 INFO L125 PetriNetUnfolderBase]: For 42195/42195 co-relation queries the response was YES. [2023-08-27 09:38:24,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16688 conditions, 2350 events. 1377/2350 cut-off events. For 42195/42195 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12271 event pairs, 331 based on Foata normal form. 36/2386 useless extension candidates. Maximal degree in co-relation 16615. Up to 1313 conditions per place. [2023-08-27 09:38:24,255 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 150 selfloop transitions, 109 changer transitions 24/283 dead transitions. [2023-08-27 09:38:24,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 283 transitions, 5811 flow [2023-08-27 09:38:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 09:38:24,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 09:38:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1191 transitions. [2023-08-27 09:38:24,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40970072239422084 [2023-08-27 09:38:24,257 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1191 transitions. [2023-08-27 09:38:24,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1191 transitions. [2023-08-27 09:38:24,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:24,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1191 transitions. [2023-08-27 09:38:24,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 70.05882352941177) internal successors, (1191), 17 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:24,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:24,262 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 171.0) internal successors, (3078), 18 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:24,262 INFO L175 Difference]: Start difference. First operand has 135 places, 164 transitions, 3282 flow. Second operand 17 states and 1191 transitions. [2023-08-27 09:38:24,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 283 transitions, 5811 flow [2023-08-27 09:38:24,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 283 transitions, 5711 flow, removed 37 selfloop flow, removed 3 redundant places. [2023-08-27 09:38:24,352 INFO L231 Difference]: Finished difference. Result has 160 places, 223 transitions, 5113 flow [2023-08-27 09:38:24,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=3209, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5113, PETRI_PLACES=160, PETRI_TRANSITIONS=223} [2023-08-27 09:38:24,352 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 134 predicate places. [2023-08-27 09:38:24,352 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 223 transitions, 5113 flow [2023-08-27 09:38:24,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:24,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:24,353 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:24,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:24,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:24,557 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:24,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:24,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1487184967, now seen corresponding path program 6 times [2023-08-27 09:38:24,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:24,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500425924] [2023-08-27 09:38:24,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:24,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:24,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500425924] [2023-08-27 09:38:24,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500425924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:24,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352457935] [2023-08-27 09:38:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 09:38:24,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:24,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:24,718 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) [2023-08-27 09:38:24,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 09:38:24,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 09:38:24,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:24,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:38:24,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:24,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:24,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352457935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:24,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:24,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 09:38:24,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434184961] [2023-08-27 09:38:24,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:24,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 09:38:24,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:24,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 09:38:24,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-27 09:38:24,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:24,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 223 transitions, 5113 flow. Second operand has 17 states, 17 states have (on average 65.82352941176471) internal successors, (1119), 17 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:24,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:24,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:24,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:25,738 INFO L124 PetriNetUnfolderBase]: 1893/3262 cut-off events. [2023-08-27 09:38:25,738 INFO L125 PetriNetUnfolderBase]: For 84792/84792 co-relation queries the response was YES. [2023-08-27 09:38:25,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25487 conditions, 3262 events. 1893/3262 cut-off events. For 84792/84792 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18693 event pairs, 359 based on Foata normal form. 52/3314 useless extension candidates. Maximal degree in co-relation 25401. Up to 1307 conditions per place. [2023-08-27 09:38:25,764 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 189 selfloop transitions, 200 changer transitions 30/419 dead transitions. [2023-08-27 09:38:25,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 419 transitions, 9678 flow [2023-08-27 09:38:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 09:38:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 09:38:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1535 transitions. [2023-08-27 09:38:25,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40802764486975013 [2023-08-27 09:38:25,766 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1535 transitions. [2023-08-27 09:38:25,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1535 transitions. [2023-08-27 09:38:25,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:25,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1535 transitions. [2023-08-27 09:38:25,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 69.77272727272727) internal successors, (1535), 22 states have internal predecessors, (1535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:25,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:25,771 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 171.0) internal successors, (3933), 23 states have internal predecessors, (3933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:25,771 INFO L175 Difference]: Start difference. First operand has 160 places, 223 transitions, 5113 flow. Second operand 22 states and 1535 transitions. [2023-08-27 09:38:25,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 419 transitions, 9678 flow [2023-08-27 09:38:25,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 419 transitions, 9465 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-27 09:38:25,969 INFO L231 Difference]: Finished difference. Result has 190 places, 320 transitions, 8111 flow [2023-08-27 09:38:25,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8111, PETRI_PLACES=190, PETRI_TRANSITIONS=320} [2023-08-27 09:38:25,970 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 164 predicate places. [2023-08-27 09:38:25,970 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 320 transitions, 8111 flow [2023-08-27 09:38:25,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 65.82352941176471) internal successors, (1119), 17 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:25,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:25,970 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:25,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:26,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:26,175 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:26,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:26,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1887179761, now seen corresponding path program 7 times [2023-08-27 09:38:26,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:26,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8270782] [2023-08-27 09:38:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:26,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:26,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:26,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8270782] [2023-08-27 09:38:26,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8270782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:26,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510960585] [2023-08-27 09:38:26,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 09:38:26,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:26,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:26,339 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) [2023-08-27 09:38:26,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 09:38:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:26,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:38:26,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:26,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:26,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510960585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:26,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:26,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 09:38:26,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491487048] [2023-08-27 09:38:26,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:26,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 09:38:26,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 09:38:26,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-27 09:38:26,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:26,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 320 transitions, 8111 flow. Second operand has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:26,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:26,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:26,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:27,509 INFO L124 PetriNetUnfolderBase]: 2397/4130 cut-off events. [2023-08-27 09:38:27,509 INFO L125 PetriNetUnfolderBase]: For 140230/140230 co-relation queries the response was YES. [2023-08-27 09:38:27,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34554 conditions, 4130 events. 2397/4130 cut-off events. For 140230/140230 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24780 event pairs, 260 based on Foata normal form. 88/4218 useless extension candidates. Maximal degree in co-relation 34455. Up to 1671 conditions per place. [2023-08-27 09:38:27,556 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 195 selfloop transitions, 290 changer transitions 39/524 dead transitions. [2023-08-27 09:38:27,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 524 transitions, 12837 flow [2023-08-27 09:38:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 09:38:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 09:38:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1810 transitions. [2023-08-27 09:38:27,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4071075123706703 [2023-08-27 09:38:27,558 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1810 transitions. [2023-08-27 09:38:27,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1810 transitions. [2023-08-27 09:38:27,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:27,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1810 transitions. [2023-08-27 09:38:27,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 69.61538461538461) internal successors, (1810), 26 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:27,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:27,565 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 171.0) internal successors, (4617), 27 states have internal predecessors, (4617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:27,565 INFO L175 Difference]: Start difference. First operand has 190 places, 320 transitions, 8111 flow. Second operand 26 states and 1810 transitions. [2023-08-27 09:38:27,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 524 transitions, 12837 flow [2023-08-27 09:38:28,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 524 transitions, 12678 flow, removed 67 selfloop flow, removed 4 redundant places. [2023-08-27 09:38:28,017 INFO L231 Difference]: Finished difference. Result has 223 places, 410 transitions, 11006 flow [2023-08-27 09:38:28,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=7978, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11006, PETRI_PLACES=223, PETRI_TRANSITIONS=410} [2023-08-27 09:38:28,018 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 197 predicate places. [2023-08-27 09:38:28,018 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 410 transitions, 11006 flow [2023-08-27 09:38:28,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 65.8125) internal successors, (1053), 16 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:28,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:28,019 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:28,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:28,220 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,SelfDestructingSolverStorable22 [2023-08-27 09:38:28,221 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:28,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash 282475038, now seen corresponding path program 2 times [2023-08-27 09:38:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688892229] [2023-08-27 09:38:28,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:28,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:28,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688892229] [2023-08-27 09:38:28,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688892229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:28,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500709047] [2023-08-27 09:38:28,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:38:28,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:28,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:28,303 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) [2023-08-27 09:38:28,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 09:38:28,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:38:28,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:28,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 09:38:28,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:28,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:28,480 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:28,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500709047] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:28,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:28,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-08-27 09:38:28,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954710532] [2023-08-27 09:38:28,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:28,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 09:38:28,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:28,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 09:38:28,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2023-08-27 09:38:28,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:38:28,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 410 transitions, 11006 flow. Second operand has 22 states, 22 states have (on average 68.45454545454545) internal successors, (1506), 22 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:28,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:28,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:38:28,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:29,956 INFO L124 PetriNetUnfolderBase]: 3005/5130 cut-off events. [2023-08-27 09:38:29,956 INFO L125 PetriNetUnfolderBase]: For 199974/199974 co-relation queries the response was YES. [2023-08-27 09:38:29,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46581 conditions, 5130 events. 3005/5130 cut-off events. For 199974/199974 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 29615 event pairs, 275 based on Foata normal form. 180/5310 useless extension candidates. Maximal degree in co-relation 46471. Up to 2063 conditions per place. [2023-08-27 09:38:30,003 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 255 selfloop transitions, 355 changer transitions 18/628 dead transitions. [2023-08-27 09:38:30,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 628 transitions, 17021 flow [2023-08-27 09:38:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 09:38:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 09:38:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1994 transitions. [2023-08-27 09:38:30,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43188217457223305 [2023-08-27 09:38:30,006 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1994 transitions. [2023-08-27 09:38:30,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1994 transitions. [2023-08-27 09:38:30,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:30,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1994 transitions. [2023-08-27 09:38:30,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.85185185185185) internal successors, (1994), 27 states have internal predecessors, (1994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:30,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 171.0) internal successors, (4788), 28 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:30,012 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 171.0) internal successors, (4788), 28 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:30,012 INFO L175 Difference]: Start difference. First operand has 223 places, 410 transitions, 11006 flow. Second operand 27 states and 1994 transitions. [2023-08-27 09:38:30,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 628 transitions, 17021 flow [2023-08-27 09:38:30,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 628 transitions, 16533 flow, removed 152 selfloop flow, removed 15 redundant places. [2023-08-27 09:38:30,563 INFO L231 Difference]: Finished difference. Result has 250 places, 497 transitions, 14230 flow [2023-08-27 09:38:30,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=10654, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14230, PETRI_PLACES=250, PETRI_TRANSITIONS=497} [2023-08-27 09:38:30,564 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 224 predicate places. [2023-08-27 09:38:30,564 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 497 transitions, 14230 flow [2023-08-27 09:38:30,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 68.45454545454545) internal successors, (1506), 22 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:30,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:30,564 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:30,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 09:38:30,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-27 09:38:30,769 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:30,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash 346013778, now seen corresponding path program 8 times [2023-08-27 09:38:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:30,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493413034] [2023-08-27 09:38:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:30,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493413034] [2023-08-27 09:38:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493413034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421977381] [2023-08-27 09:38:30,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:38:30,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:30,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:30,887 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) [2023-08-27 09:38:30,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 09:38:30,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:38:30,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:30,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 09:38:30,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:30,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:31,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:38:31,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421977381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:31,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:31,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-08-27 09:38:31,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635905912] [2023-08-27 09:38:31,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:31,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 09:38:31,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:31,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 09:38:31,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2023-08-27 09:38:31,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:31,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 497 transitions, 14230 flow. Second operand has 24 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:31,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:31,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:31,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:33,295 INFO L124 PetriNetUnfolderBase]: 3781/6530 cut-off events. [2023-08-27 09:38:33,295 INFO L125 PetriNetUnfolderBase]: For 266172/266172 co-relation queries the response was YES. [2023-08-27 09:38:33,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58821 conditions, 6530 events. 3781/6530 cut-off events. For 266172/266172 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 39761 event pairs, 378 based on Foata normal form. 148/6678 useless extension candidates. Maximal degree in co-relation 58699. Up to 2687 conditions per place. [2023-08-27 09:38:33,353 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 271 selfloop transitions, 476 changer transitions 68/815 dead transitions. [2023-08-27 09:38:33,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 815 transitions, 22403 flow [2023-08-27 09:38:33,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 09:38:33,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 09:38:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2710 transitions. [2023-08-27 09:38:33,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063577747788274 [2023-08-27 09:38:33,356 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2710 transitions. [2023-08-27 09:38:33,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2710 transitions. [2023-08-27 09:38:33,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:33,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2710 transitions. [2023-08-27 09:38:33,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 69.48717948717949) internal successors, (2710), 39 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:33,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 171.0) internal successors, (6840), 40 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:33,364 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 171.0) internal successors, (6840), 40 states have internal predecessors, (6840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:33,364 INFO L175 Difference]: Start difference. First operand has 250 places, 497 transitions, 14230 flow. Second operand 39 states and 2710 transitions. [2023-08-27 09:38:33,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 815 transitions, 22403 flow [2023-08-27 09:38:34,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 815 transitions, 22001 flow, removed 173 selfloop flow, removed 3 redundant places. [2023-08-27 09:38:34,346 INFO L231 Difference]: Finished difference. Result has 301 places, 644 transitions, 19053 flow [2023-08-27 09:38:34,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=14018, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=19053, PETRI_PLACES=301, PETRI_TRANSITIONS=644} [2023-08-27 09:38:34,347 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 275 predicate places. [2023-08-27 09:38:34,347 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 644 transitions, 19053 flow [2023-08-27 09:38:34,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 65.45833333333333) internal successors, (1571), 24 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:34,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:34,347 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:34,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:34,552 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,SelfDestructingSolverStorable24 [2023-08-27 09:38:34,553 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:34,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1621934479, now seen corresponding path program 9 times [2023-08-27 09:38:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:34,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217431449] [2023-08-27 09:38:34,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:34,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:34,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217431449] [2023-08-27 09:38:34,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217431449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:34,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612915473] [2023-08-27 09:38:34,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:38:34,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:34,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:34,816 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) [2023-08-27 09:38:34,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 09:38:34,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-08-27 09:38:34,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:34,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 09:38:34,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:34,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:35,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612915473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:35,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:35,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-08-27 09:38:35,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548883691] [2023-08-27 09:38:35,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:35,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 09:38:35,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 09:38:35,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-08-27 09:38:35,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:35,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 644 transitions, 19053 flow. Second operand has 40 states, 40 states have (on average 65.3) internal successors, (2612), 40 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:35,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:35,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:35,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:38,399 INFO L124 PetriNetUnfolderBase]: 4729/8306 cut-off events. [2023-08-27 09:38:38,399 INFO L125 PetriNetUnfolderBase]: For 375182/375182 co-relation queries the response was YES. [2023-08-27 09:38:38,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78086 conditions, 8306 events. 4729/8306 cut-off events. For 375182/375182 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 51041 event pairs, 995 based on Foata normal form. 168/8474 useless extension candidates. Maximal degree in co-relation 77947. Up to 4243 conditions per place. [2023-08-27 09:38:38,495 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 521 selfloop transitions, 414 changer transitions 72/1007 dead transitions. [2023-08-27 09:38:38,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1007 transitions, 29327 flow [2023-08-27 09:38:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 09:38:38,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 09:38:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2876 transitions. [2023-08-27 09:38:38,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41021252317786333 [2023-08-27 09:38:38,499 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2876 transitions. [2023-08-27 09:38:38,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2876 transitions. [2023-08-27 09:38:38,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:38,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2876 transitions. [2023-08-27 09:38:38,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 70.14634146341463) internal successors, (2876), 41 states have internal predecessors, (2876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:38,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:38,507 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 171.0) internal successors, (7182), 42 states have internal predecessors, (7182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:38,507 INFO L175 Difference]: Start difference. First operand has 301 places, 644 transitions, 19053 flow. Second operand 41 states and 2876 transitions. [2023-08-27 09:38:38,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1007 transitions, 29327 flow [2023-08-27 09:38:40,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1007 transitions, 28462 flow, removed 165 selfloop flow, removed 12 redundant places. [2023-08-27 09:38:40,538 INFO L231 Difference]: Finished difference. Result has 354 places, 834 transitions, 25310 flow [2023-08-27 09:38:40,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=18268, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=25310, PETRI_PLACES=354, PETRI_TRANSITIONS=834} [2023-08-27 09:38:40,538 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 328 predicate places. [2023-08-27 09:38:40,539 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 834 transitions, 25310 flow [2023-08-27 09:38:40,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 65.3) internal successors, (2612), 40 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:40,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:40,539 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:40,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:40,739 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,SelfDestructingSolverStorable25 [2023-08-27 09:38:40,740 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:40,740 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:40,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1986265017, now seen corresponding path program 10 times [2023-08-27 09:38:40,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:40,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681239366] [2023-08-27 09:38:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:40,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:41,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681239366] [2023-08-27 09:38:41,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681239366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:41,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829610579] [2023-08-27 09:38:41,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:38:41,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:41,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:41,013 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) [2023-08-27 09:38:41,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 09:38:41,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:38:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:41,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 09:38:41,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:41,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:41,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829610579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:41,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:41,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-08-27 09:38:41,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229996581] [2023-08-27 09:38:41,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:41,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 09:38:41,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:41,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 09:38:41,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1274, Unknown=0, NotChecked=0, Total=1640 [2023-08-27 09:38:41,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:41,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 834 transitions, 25310 flow. Second operand has 41 states, 41 states have (on average 65.3170731707317) internal successors, (2678), 41 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:41,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:41,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:41,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:38:46,344 INFO L124 PetriNetUnfolderBase]: 6653/11866 cut-off events. [2023-08-27 09:38:46,344 INFO L125 PetriNetUnfolderBase]: For 693774/693774 co-relation queries the response was YES. [2023-08-27 09:38:46,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115547 conditions, 11866 events. 6653/11866 cut-off events. For 693774/693774 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 79136 event pairs, 1034 based on Foata normal form. 176/12042 useless extension candidates. Maximal degree in co-relation 115383. Up to 5151 conditions per place. [2023-08-27 09:38:46,478 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 580 selfloop transitions, 808 changer transitions 80/1468 dead transitions. [2023-08-27 09:38:46,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1468 transitions, 46468 flow [2023-08-27 09:38:46,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-27 09:38:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-27 09:38:46,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3220 transitions. [2023-08-27 09:38:46,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2023-08-27 09:38:46,481 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3220 transitions. [2023-08-27 09:38:46,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3220 transitions. [2023-08-27 09:38:46,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:38:46,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3220 transitions. [2023-08-27 09:38:46,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:46,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 171.0) internal successors, (8037), 47 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:46,490 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 171.0) internal successors, (8037), 47 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:46,490 INFO L175 Difference]: Start difference. First operand has 354 places, 834 transitions, 25310 flow. Second operand 46 states and 3220 transitions. [2023-08-27 09:38:46,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1468 transitions, 46468 flow [2023-08-27 09:38:50,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1468 transitions, 45849 flow, removed 254 selfloop flow, removed 13 redundant places. [2023-08-27 09:38:50,741 INFO L231 Difference]: Finished difference. Result has 407 places, 1204 transitions, 39866 flow [2023-08-27 09:38:50,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=24953, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=39866, PETRI_PLACES=407, PETRI_TRANSITIONS=1204} [2023-08-27 09:38:50,742 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 381 predicate places. [2023-08-27 09:38:50,742 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1204 transitions, 39866 flow [2023-08-27 09:38:50,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 65.3170731707317) internal successors, (2678), 41 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:50,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:38:50,743 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:38:50,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 09:38:50,943 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,SelfDestructingSolverStorable26 [2023-08-27 09:38:50,943 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:38:50,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:38:50,943 INFO L85 PathProgramCache]: Analyzing trace with hash -84448743, now seen corresponding path program 11 times [2023-08-27 09:38:50,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:38:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618945475] [2023-08-27 09:38:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:38:50,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:38:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:38:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:51,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:38:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618945475] [2023-08-27 09:38:51,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618945475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:38:51,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418330115] [2023-08-27 09:38:51,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:38:51,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:38:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:38:51,195 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) [2023-08-27 09:38:51,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 09:38:51,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-27 09:38:51,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:38:51,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 09:38:51,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:38:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:51,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:38:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:38:51,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418330115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:38:51,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:38:51,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-08-27 09:38:51,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843529046] [2023-08-27 09:38:51,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:38:51,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-27 09:38:51,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:38:51,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-27 09:38:51,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2023-08-27 09:38:51,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:38:51,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1204 transitions, 39866 flow. Second operand has 40 states, 40 states have (on average 65.3) internal successors, (2612), 40 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:38:51,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:38:51,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:38:51,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:39:00,361 INFO L124 PetriNetUnfolderBase]: 10349/18658 cut-off events. [2023-08-27 09:39:00,361 INFO L125 PetriNetUnfolderBase]: For 1502049/1502049 co-relation queries the response was YES. [2023-08-27 09:39:00,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190225 conditions, 18658 events. 10349/18658 cut-off events. For 1502049/1502049 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 137147 event pairs, 1170 based on Foata normal form. 320/18978 useless extension candidates. Maximal degree in co-relation 190039. Up to 8247 conditions per place. [2023-08-27 09:39:00,612 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 597 selfloop transitions, 1456 changer transitions 92/2145 dead transitions. [2023-08-27 09:39:00,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 2145 transitions, 74476 flow [2023-08-27 09:39:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-27 09:39:00,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-27 09:39:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3632 transitions. [2023-08-27 09:39:00,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40845704003598743 [2023-08-27 09:39:00,617 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3632 transitions. [2023-08-27 09:39:00,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3632 transitions. [2023-08-27 09:39:00,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:39:00,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3632 transitions. [2023-08-27 09:39:00,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 69.84615384615384) internal successors, (3632), 52 states have internal predecessors, (3632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:00,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 171.0) internal successors, (9063), 53 states have internal predecessors, (9063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:00,627 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 171.0) internal successors, (9063), 53 states have internal predecessors, (9063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:00,627 INFO L175 Difference]: Start difference. First operand has 407 places, 1204 transitions, 39866 flow. Second operand 52 states and 3632 transitions. [2023-08-27 09:39:00,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 2145 transitions, 74476 flow [2023-08-27 09:39:10,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 2145 transitions, 73398 flow, removed 363 selfloop flow, removed 29 redundant places. [2023-08-27 09:39:10,498 INFO L231 Difference]: Finished difference. Result has 454 places, 1793 transitions, 64024 flow [2023-08-27 09:39:10,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=39284, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=945, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=64024, PETRI_PLACES=454, PETRI_TRANSITIONS=1793} [2023-08-27 09:39:10,499 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 428 predicate places. [2023-08-27 09:39:10,499 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1793 transitions, 64024 flow [2023-08-27 09:39:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 65.3) internal successors, (2612), 40 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:10,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:39:10,500 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:39:10,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 09:39:10,702 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,SelfDestructingSolverStorable27 [2023-08-27 09:39:10,703 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:39:10,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:39:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1560715071, now seen corresponding path program 12 times [2023-08-27 09:39:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:39:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958175203] [2023-08-27 09:39:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:39:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:39:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:39:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:39:10,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:39:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958175203] [2023-08-27 09:39:10,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958175203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:39:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796191736] [2023-08-27 09:39:10,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 09:39:10,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:39:10,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:39:10,964 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) [2023-08-27 09:39:10,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 09:39:11,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-27 09:39:11,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:39:11,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 09:39:11,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:39:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:39:11,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:39:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:39:11,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796191736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:39:11,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:39:11,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-08-27 09:39:11,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258396426] [2023-08-27 09:39:11,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:39:11,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 09:39:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:39:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 09:39:11,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1358, Unknown=0, NotChecked=0, Total=1640 [2023-08-27 09:39:11,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:39:11,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1793 transitions, 64024 flow. Second operand has 41 states, 41 states have (on average 65.3170731707317) internal successors, (2678), 41 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:11,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:39:11,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:39:11,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:39:25,343 INFO L124 PetriNetUnfolderBase]: 12961/23502 cut-off events. [2023-08-27 09:39:25,344 INFO L125 PetriNetUnfolderBase]: For 1894284/1894284 co-relation queries the response was YES. [2023-08-27 09:39:25,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250068 conditions, 23502 events. 12961/23502 cut-off events. For 1894284/1894284 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 179992 event pairs, 1105 based on Foata normal form. 332/23834 useless extension candidates. Maximal degree in co-relation 249873. Up to 10479 conditions per place. [2023-08-27 09:39:25,674 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 555 selfloop transitions, 2002 changer transitions 110/2667 dead transitions. [2023-08-27 09:39:25,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2667 transitions, 97208 flow [2023-08-27 09:39:25,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-27 09:39:25,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-27 09:39:25,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 4327 transitions. [2023-08-27 09:39:25,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40813054140728167 [2023-08-27 09:39:25,678 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 4327 transitions. [2023-08-27 09:39:25,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 4327 transitions. [2023-08-27 09:39:25,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:39:25,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 4327 transitions. [2023-08-27 09:39:25,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 69.79032258064517) internal successors, (4327), 62 states have internal predecessors, (4327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:25,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 171.0) internal successors, (10773), 63 states have internal predecessors, (10773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:25,688 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 171.0) internal successors, (10773), 63 states have internal predecessors, (10773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:25,688 INFO L175 Difference]: Start difference. First operand has 454 places, 1793 transitions, 64024 flow. Second operand 62 states and 4327 transitions. [2023-08-27 09:39:25,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 2667 transitions, 97208 flow [2023-08-27 09:39:42,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2667 transitions, 96132 flow, removed 405 selfloop flow, removed 14 redundant places. [2023-08-27 09:39:42,641 INFO L231 Difference]: Finished difference. Result has 528 places, 2264 transitions, 84296 flow [2023-08-27 09:39:42,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=63384, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1549, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=84296, PETRI_PLACES=528, PETRI_TRANSITIONS=2264} [2023-08-27 09:39:42,643 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 502 predicate places. [2023-08-27 09:39:42,643 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 2264 transitions, 84296 flow [2023-08-27 09:39:42,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 65.3170731707317) internal successors, (2678), 41 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:42,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:39:42,643 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:39:42,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 09:39:42,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:39:42,844 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:39:42,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:39:42,845 INFO L85 PathProgramCache]: Analyzing trace with hash 701012420, now seen corresponding path program 13 times [2023-08-27 09:39:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:39:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034140170] [2023-08-27 09:39:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:39:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:39:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:39:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:39:43,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:39:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034140170] [2023-08-27 09:39:43,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034140170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:39:43,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211503755] [2023-08-27 09:39:43,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 09:39:43,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:39:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:39:43,082 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) [2023-08-27 09:39:43,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 09:39:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:39:43,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 09:39:43,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:39:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:39:43,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:39:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:39:43,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211503755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:39:43,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:39:43,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2023-08-27 09:39:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980392354] [2023-08-27 09:39:43,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:39:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 09:39:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:39:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 09:39:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2023-08-27 09:39:43,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:39:43,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 2264 transitions, 84296 flow. Second operand has 42 states, 42 states have (on average 65.28571428571429) internal successors, (2742), 42 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:39:43,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:39:43,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:39:43,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:40:03,315 INFO L124 PetriNetUnfolderBase]: 15029/27278 cut-off events. [2023-08-27 09:40:03,315 INFO L125 PetriNetUnfolderBase]: For 2655536/2655536 co-relation queries the response was YES. [2023-08-27 09:40:03,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303843 conditions, 27278 events. 15029/27278 cut-off events. For 2655536/2655536 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 210086 event pairs, 1049 based on Foata normal form. 402/27680 useless extension candidates. Maximal degree in co-relation 303622. Up to 12143 conditions per place. [2023-08-27 09:40:03,782 INFO L140 encePairwiseOnDemand]: 163/171 looper letters, 538 selfloop transitions, 2492 changer transitions 141/3171 dead transitions. [2023-08-27 09:40:03,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 605 places, 3171 transitions, 118249 flow [2023-08-27 09:40:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-08-27 09:40:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2023-08-27 09:40:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 5448 transitions. [2023-08-27 09:40:03,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40845704003598743 [2023-08-27 09:40:03,787 INFO L72 ComplementDD]: Start complementDD. Operand 78 states and 5448 transitions. [2023-08-27 09:40:03,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 5448 transitions. [2023-08-27 09:40:03,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:40:03,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 78 states and 5448 transitions. [2023-08-27 09:40:03,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 79 states, 78 states have (on average 69.84615384615384) internal successors, (5448), 78 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:03,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 79 states, 79 states have (on average 171.0) internal successors, (13509), 79 states have internal predecessors, (13509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:03,799 INFO L81 ComplementDD]: Finished complementDD. Result has 79 states, 79 states have (on average 171.0) internal successors, (13509), 79 states have internal predecessors, (13509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:03,799 INFO L175 Difference]: Start difference. First operand has 528 places, 2264 transitions, 84296 flow. Second operand 78 states and 5448 transitions. [2023-08-27 09:40:03,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 605 places, 3171 transitions, 118249 flow [2023-08-27 09:40:29,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 3171 transitions, 116110 flow, removed 743 selfloop flow, removed 18 redundant places. [2023-08-27 09:40:29,776 INFO L231 Difference]: Finished difference. Result has 627 places, 2765 transitions, 105770 flow [2023-08-27 09:40:29,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=82869, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2003, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=78, PETRI_FLOW=105770, PETRI_PLACES=627, PETRI_TRANSITIONS=2765} [2023-08-27 09:40:29,778 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 601 predicate places. [2023-08-27 09:40:29,779 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 2765 transitions, 105770 flow [2023-08-27 09:40:29,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 65.28571428571429) internal successors, (2742), 42 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:29,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:40:29,779 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:40:29,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 09:40:29,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:40:29,989 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:40:29,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:40:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 290827999, now seen corresponding path program 3 times [2023-08-27 09:40:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:40:29,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230777250] [2023-08-27 09:40:29,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:40:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:40:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:40:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:40:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:40:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230777250] [2023-08-27 09:40:30,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230777250] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:40:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836842569] [2023-08-27 09:40:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:40:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:40:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:40:30,506 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) [2023-08-27 09:40:30,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 09:40:30,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-08-27 09:40:30,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:40:30,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 09:40:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:40:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:40:30,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:40:31,451 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:40:31,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836842569] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:40:31,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:40:31,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2023-08-27 09:40:31,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743140075] [2023-08-27 09:40:31,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:40:31,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-08-27 09:40:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:40:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-08-27 09:40:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2023-08-27 09:40:31,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 171 [2023-08-27 09:40:31,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 2765 transitions, 105770 flow. Second operand has 74 states, 74 states have (on average 68.13513513513513) internal successors, (5042), 74 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:31,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:40:31,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 171 [2023-08-27 09:40:31,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:40:59,144 INFO L124 PetriNetUnfolderBase]: 17213/30822 cut-off events. [2023-08-27 09:40:59,144 INFO L125 PetriNetUnfolderBase]: For 4880670/4880670 co-relation queries the response was YES. [2023-08-27 09:40:59,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381469 conditions, 30822 events. 17213/30822 cut-off events. For 4880670/4880670 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 224772 event pairs, 1189 based on Foata normal form. 648/31470 useless extension candidates. Maximal degree in co-relation 381211. Up to 13547 conditions per place. [2023-08-27 09:40:59,808 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 806 selfloop transitions, 2654 changer transitions 98/3558 dead transitions. [2023-08-27 09:40:59,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 3558 transitions, 145249 flow [2023-08-27 09:40:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-08-27 09:40:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2023-08-27 09:40:59,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 6778 transitions. [2023-08-27 09:40:59,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308415967454869 [2023-08-27 09:40:59,813 INFO L72 ComplementDD]: Start complementDD. Operand 92 states and 6778 transitions. [2023-08-27 09:40:59,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 6778 transitions. [2023-08-27 09:40:59,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:40:59,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 92 states and 6778 transitions. [2023-08-27 09:40:59,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 93 states, 92 states have (on average 73.67391304347827) internal successors, (6778), 92 states have internal predecessors, (6778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:59,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 93 states, 93 states have (on average 171.0) internal successors, (15903), 93 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:59,827 INFO L81 ComplementDD]: Finished complementDD. Result has 93 states, 93 states have (on average 171.0) internal successors, (15903), 93 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:40:59,827 INFO L175 Difference]: Start difference. First operand has 627 places, 2765 transitions, 105770 flow. Second operand 92 states and 6778 transitions. [2023-08-27 09:40:59,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 3558 transitions, 145249 flow [2023-08-27 09:41:32,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 700 places, 3558 transitions, 142869 flow, removed 800 selfloop flow, removed 18 redundant places. [2023-08-27 09:41:33,015 INFO L231 Difference]: Finished difference. Result has 753 places, 3036 transitions, 120277 flow [2023-08-27 09:41:33,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=103740, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=92, PETRI_FLOW=120277, PETRI_PLACES=753, PETRI_TRANSITIONS=3036} [2023-08-27 09:41:33,017 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 727 predicate places. [2023-08-27 09:41:33,017 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3036 transitions, 120277 flow [2023-08-27 09:41:33,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 68.13513513513513) internal successors, (5042), 74 states have internal predecessors, (5042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:41:33,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:41:33,018 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:41:33,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 09:41:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:41:33,218 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:41:33,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:41:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash 425734024, now seen corresponding path program 14 times [2023-08-27 09:41:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:41:33,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581058633] [2023-08-27 09:41:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:41:33,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:41:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:41:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:41:34,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:41:34,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581058633] [2023-08-27 09:41:34,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581058633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:41:34,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344808744] [2023-08-27 09:41:34,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:41:34,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:41:34,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:41:34,002 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) [2023-08-27 09:41:34,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 09:41:34,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:41:34,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:41:34,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 09:41:34,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:41:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:41:34,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:41:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:41:34,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344808744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:41:34,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:41:34,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2023-08-27 09:41:34,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922070315] [2023-08-27 09:41:34,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:41:34,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-08-27 09:41:34,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:41:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-08-27 09:41:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1353, Invalid=4347, Unknown=0, NotChecked=0, Total=5700 [2023-08-27 09:41:34,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:41:34,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3036 transitions, 120277 flow. Second operand has 76 states, 76 states have (on average 65.14473684210526) internal successors, (4951), 76 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:41:34,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:41:34,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:41:34,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:42:04,404 INFO L124 PetriNetUnfolderBase]: 17217/30854 cut-off events. [2023-08-27 09:42:04,404 INFO L125 PetriNetUnfolderBase]: For 4100252/4100252 co-relation queries the response was YES. [2023-08-27 09:42:05,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383741 conditions, 30854 events. 17217/30854 cut-off events. For 4100252/4100252 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 225716 event pairs, 1752 based on Foata normal form. 52/30906 useless extension candidates. Maximal degree in co-relation 383429. Up to 13575 conditions per place. [2023-08-27 09:42:05,610 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 640 selfloop transitions, 2717 changer transitions 163/3520 dead transitions. [2023-08-27 09:42:05,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 840 places, 3520 transitions, 141295 flow [2023-08-27 09:42:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-27 09:42:05,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-27 09:42:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6089 transitions. [2023-08-27 09:42:05,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40463849016480596 [2023-08-27 09:42:05,642 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6089 transitions. [2023-08-27 09:42:05,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6089 transitions. [2023-08-27 09:42:05,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:42:05,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6089 transitions. [2023-08-27 09:42:05,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 69.19318181818181) internal successors, (6089), 88 states have internal predecessors, (6089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:42:05,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 171.0) internal successors, (15219), 89 states have internal predecessors, (15219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:42:05,665 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 171.0) internal successors, (15219), 89 states have internal predecessors, (15219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:42:05,666 INFO L175 Difference]: Start difference. First operand has 753 places, 3036 transitions, 120277 flow. Second operand 88 states and 6089 transitions. [2023-08-27 09:42:05,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 840 places, 3520 transitions, 141295 flow [2023-08-27 09:42:45,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 827 places, 3520 transitions, 140156 flow, removed 177 selfloop flow, removed 13 redundant places. [2023-08-27 09:42:45,087 INFO L231 Difference]: Finished difference. Result has 837 places, 3079 transitions, 126144 flow [2023-08-27 09:42:45,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=119152, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2677, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=126144, PETRI_PLACES=837, PETRI_TRANSITIONS=3079} [2023-08-27 09:42:45,089 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 811 predicate places. [2023-08-27 09:42:45,089 INFO L495 AbstractCegarLoop]: Abstraction has has 837 places, 3079 transitions, 126144 flow [2023-08-27 09:42:45,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 65.14473684210526) internal successors, (4951), 76 states have internal predecessors, (4951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:42:45,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:42:45,090 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:42:45,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 09:42:45,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:42:45,290 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:42:45,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:42:45,291 INFO L85 PathProgramCache]: Analyzing trace with hash -615569414, now seen corresponding path program 15 times [2023-08-27 09:42:45,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:42:45,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414075427] [2023-08-27 09:42:45,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:42:45,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:42:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:42:45,943 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:42:45,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:42:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414075427] [2023-08-27 09:42:45,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414075427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:42:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996689586] [2023-08-27 09:42:45,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:42:45,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:42:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:42:45,945 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) [2023-08-27 09:42:45,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 09:42:46,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-08-27 09:42:46,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:42:46,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 09:42:46,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:42:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:42:46,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:42:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:42:46,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996689586] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:42:46,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:42:46,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2023-08-27 09:42:46,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062327475] [2023-08-27 09:42:46,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:42:46,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-27 09:42:46,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:42:46,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-27 09:42:46,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2023-08-27 09:42:46,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 171 [2023-08-27 09:42:46,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 837 places, 3079 transitions, 126144 flow. Second operand has 46 states, 46 states have (on average 65.1304347826087) internal successors, (2996), 46 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:42:46,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:42:46,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 171 [2023-08-27 09:42:46,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:43:18,134 INFO L124 PetriNetUnfolderBase]: 17213/30850 cut-off events. [2023-08-27 09:43:18,134 INFO L125 PetriNetUnfolderBase]: For 4040569/4040569 co-relation queries the response was YES. [2023-08-27 09:43:18,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391812 conditions, 30850 events. 17213/30850 cut-off events. For 4040569/4040569 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 225821 event pairs, 1813 based on Foata normal form. 4/30854 useless extension candidates. Maximal degree in co-relation 391491. Up to 13575 conditions per place. [2023-08-27 09:43:18,956 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 641 selfloop transitions, 2715 changer transitions 152/3508 dead transitions. [2023-08-27 09:43:18,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 917 places, 3508 transitions, 145613 flow [2023-08-27 09:43:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-27 09:43:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-27 09:43:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5597 transitions. [2023-08-27 09:43:18,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40408634755613315 [2023-08-27 09:43:18,961 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5597 transitions. [2023-08-27 09:43:18,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5597 transitions. [2023-08-27 09:43:18,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:43:18,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5597 transitions. [2023-08-27 09:43:18,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 69.09876543209876) internal successors, (5597), 81 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:43:18,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 171.0) internal successors, (14022), 82 states have internal predecessors, (14022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:43:18,972 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 171.0) internal successors, (14022), 82 states have internal predecessors, (14022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:43:18,972 INFO L175 Difference]: Start difference. First operand has 837 places, 3079 transitions, 126144 flow. Second operand 81 states and 5597 transitions. [2023-08-27 09:43:18,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 917 places, 3508 transitions, 145613 flow [2023-08-27 09:43:58,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 871 places, 3508 transitions, 141709 flow, removed 37 selfloop flow, removed 46 redundant places. [2023-08-27 09:43:58,874 INFO L231 Difference]: Finished difference. Result has 879 places, 3107 transitions, 129182 flow [2023-08-27 09:43:58,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=122252, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2688, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=129182, PETRI_PLACES=879, PETRI_TRANSITIONS=3107} [2023-08-27 09:43:58,876 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 853 predicate places. [2023-08-27 09:43:58,877 INFO L495 AbstractCegarLoop]: Abstraction has has 879 places, 3107 transitions, 129182 flow [2023-08-27 09:43:58,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 65.1304347826087) internal successors, (2996), 46 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:43:58,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:43:58,877 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:43:58,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 09:43:59,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:43:59,077 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 16 more)] === [2023-08-27 09:43:59,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:43:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1474437953, now seen corresponding path program 16 times [2023-08-27 09:43:59,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:43:59,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386676123] [2023-08-27 09:43:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:43:59,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:43:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:43:59,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 09:43:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 09:43:59,133 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 09:43:59,133 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 09:43:59,134 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (18 of 19 remaining) [2023-08-27 09:43:59,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 19 remaining) [2023-08-27 09:43:59,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 19 remaining) [2023-08-27 09:43:59,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 19 remaining) [2023-08-27 09:43:59,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 19 remaining) [2023-08-27 09:43:59,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 19 remaining) [2023-08-27 09:43:59,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 19 remaining) [2023-08-27 09:43:59,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 19 remaining) [2023-08-27 09:43:59,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-27 09:43:59,137 INFO L445 BasicCegarLoop]: Path program histogram: [16, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:43:59,140 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 09:43:59,140 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 09:43:59,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:43:59 BasicIcfg [2023-08-27 09:43:59,216 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 09:43:59,216 INFO L158 Benchmark]: Toolchain (without parser) took 344377.99ms. Allocated memory was 343.9MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 318.1MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-08-27 09:43:59,217 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 343.9MB. Free memory was 321.2MB in the beginning and 321.2MB in the end (delta: 74.5kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 09:43:59,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.02ms. Allocated memory is still 343.9MB. Free memory was 317.7MB in the beginning and 298.5MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-27 09:43:59,217 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.03ms. Allocated memory is still 343.9MB. Free memory was 298.5MB in the beginning and 296.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:43:59,217 INFO L158 Benchmark]: Boogie Preprocessor took 32.15ms. Allocated memory is still 343.9MB. Free memory was 296.4MB in the beginning and 295.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:43:59,217 INFO L158 Benchmark]: RCFGBuilder took 359.31ms. Allocated memory is still 343.9MB. Free memory was 295.0MB in the beginning and 280.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-27 09:43:59,217 INFO L158 Benchmark]: TraceAbstraction took 343620.51ms. Allocated memory was 343.9MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 280.0MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-08-27 09:43:59,218 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 343.9MB. Free memory was 321.2MB in the beginning and 321.2MB in the end (delta: 74.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 339.02ms. Allocated memory is still 343.9MB. Free memory was 317.7MB in the beginning and 298.5MB in the end (delta: 19.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.03ms. Allocated memory is still 343.9MB. Free memory was 298.5MB in the beginning and 296.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.15ms. Allocated memory is still 343.9MB. Free memory was 296.4MB in the beginning and 295.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 359.31ms. Allocated memory is still 343.9MB. Free memory was 295.0MB in the beginning and 280.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 343620.51ms. Allocated memory was 343.9MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 280.0MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 83 PlacesBefore, 26 PlacesAfterwards, 82 TransitionsBefore, 22 TransitionsAfterwards, 2304 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 87 TotalNumberOfCompositions, 2595 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2174, independent: 2140, independent conditional: 0, independent unconditional: 2140, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1300, independent: 1287, independent conditional: 0, independent unconditional: 1287, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2174, independent: 853, independent conditional: 0, independent unconditional: 853, dependent: 21, dependent conditional: 0, dependent unconditional: 21, unknown: 1300, unknown conditional: 0, unknown unconditional: 1300] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 693]: assertion can be violated assertion can be violated We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=7, id1={5:0}, id2={3:0}, j=6, k=1, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*20 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=10, k=11] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=11, k=12] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=14, k=15] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=15, k=16] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=17, k=18] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=18, k=19] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L696] COND TRUE 1 k < 20 [L698] EXPR 1 j + 1 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L704] COND TRUE 2 k < 20 [L706] EXPR 2 i + 1 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L719] 0 int condJ = j >= (2*20 +6); [L721] COND TRUE 0 condI || condJ [L722] CALL 0 reach_error() [L693] COND FALSE 0 !(0) [L693] 0 __assert_fail ("0", "triangular-longest-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 698]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 698]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 696]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 696]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 706]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 706]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 704]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 115 locations, 19 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: 343.4s, OverallIterations: 34, TraceHistogramMax: 20, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 325.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11499 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11499 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 758 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6838 IncrementalHoareTripleChecker+Invalid, 7596 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 758 mSolverCounterUnsat, 0 mSDtfsCounter, 6838 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1684 GetRequests, 451 SyntacticMatches, 39 SemanticMatches, 1194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33786 ImplicationChecksByTransitivity, 15.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=129182occurred in iteration=33, InterpolantAutomatonStates: 788, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 9.7s InterpolantComputationTime, 924 NumberOfCodeBlocks, 923 NumberOfCodeBlocksAsserted, 126 NumberOfCheckSat, 1180 ConstructedInterpolants, 0 QuantifiedInterpolants, 4658 SizeOfPredicates, 238 NumberOfNonLiveVariables, 3926 ConjunctsInSsa, 326 ConjunctsInUnsatCore, 67 InterpolantComputations, 17 PerfectInterpolantSequences, 31/4197 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 proved your program to be incorrect! [2023-08-27 09:43:59,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...