/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/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 15:04:08,161 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 15:04:08,237 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 15:04:08,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 15:04:08,242 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 15:04:08,265 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 15:04:08,266 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 15:04:08,266 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 15:04:08,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 15:04:08,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 15:04:08,270 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 15:04:08,270 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 15:04:08,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 15:04:08,272 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 15:04:08,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 15:04:08,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 15:04:08,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 15:04:08,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 15:04:08,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 15:04:08,273 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 15:04:08,273 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 15:04:08,273 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 15:04:08,274 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 15:04:08,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 15:04:08,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 15:04:08,274 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 15:04:08,275 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 15:04:08,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:04:08,275 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 15:04:08,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 15:04:08,276 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 15:04:08,276 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 15:04:08,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 15:04:08,277 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 15:04:08,277 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 15:04:08,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 15:04:08,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 15:04:08,583 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 15:04:08,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 15:04:08,586 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 15:04:08,586 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 15:04:08,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-27 15:04:09,773 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 15:04:09,999 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 15:04:10,000 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-27 15:04:10,007 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60e6c07ae/3b6017c3af254d2a938a2b0f2fb4a96c/FLAG171ef98b9 [2023-08-27 15:04:10,022 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60e6c07ae/3b6017c3af254d2a938a2b0f2fb4a96c [2023-08-27 15:04:10,027 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 15:04:10,028 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 15:04:10,032 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 15:04:10,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 15:04:10,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 15:04:10,036 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,036 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6b43b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10, skipping insertion in model container [2023-08-27 15:04:10,037 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,059 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 15:04:10,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:04:10,251 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 15:04:10,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:04:10,292 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 15:04:10,292 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 15:04:10,299 INFO L206 MainTranslator]: Completed translation [2023-08-27 15:04:10,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10 WrapperNode [2023-08-27 15:04:10,299 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 15:04:10,300 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 15:04:10,300 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 15:04:10,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 15:04:10,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,319 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,349 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 160 [2023-08-27 15:04:10,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 15:04:10,352 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 15:04:10,352 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 15:04:10,352 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 15:04:10,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,372 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,376 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,379 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,380 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,390 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,394 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 15:04:10,395 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 15:04:10,395 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 15:04:10,395 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 15:04:10,395 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (1/1) ... [2023-08-27 15:04:10,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:04:10,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:10,425 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 15:04:10,448 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 15:04:10,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 15:04:10,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 15:04:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 15:04:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 15:04:10,462 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 15:04:10,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 15:04:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 15:04:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 15:04:10,465 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 15:04:10,568 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 15:04:10,569 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 15:04:10,776 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 15:04:10,868 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 15:04:10,868 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 15:04:10,870 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:04:10 BoogieIcfgContainer [2023-08-27 15:04:10,870 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 15:04:10,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 15:04:10,872 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 15:04:10,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 15:04:10,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 03:04:10" (1/3) ... [2023-08-27 15:04:10,881 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5046cb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:04:10, skipping insertion in model container [2023-08-27 15:04:10,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:04:10" (2/3) ... [2023-08-27 15:04:10,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5046cb73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:04:10, skipping insertion in model container [2023-08-27 15:04:10,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:04:10" (3/3) ... [2023-08-27 15:04:10,883 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-27 15:04:10,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 15:04:10,898 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-27 15:04:10,898 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 15:04:10,993 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 15:04:11,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 141 transitions, 298 flow [2023-08-27 15:04:11,074 INFO L124 PetriNetUnfolderBase]: 11/139 cut-off events. [2023-08-27 15:04:11,075 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:04:11,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 139 events. 11/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-27 15:04:11,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 141 transitions, 298 flow [2023-08-27 15:04:11,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 130 transitions, 272 flow [2023-08-27 15:04:11,086 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 15:04:11,092 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 130 transitions, 272 flow [2023-08-27 15:04:11,095 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 130 transitions, 272 flow [2023-08-27 15:04:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 130 transitions, 272 flow [2023-08-27 15:04:11,121 INFO L124 PetriNetUnfolderBase]: 11/130 cut-off events. [2023-08-27 15:04:11,122 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:04:11,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 130 events. 11/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-27 15:04:11,124 INFO L119 LiptonReduction]: Number of co-enabled transitions 1184 [2023-08-27 15:04:15,715 INFO L134 LiptonReduction]: Checked pairs total: 1476 [2023-08-27 15:04:15,716 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-27 15:04:15,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 15:04:15,744 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;@45061989, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 15:04:15,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-27 15:04:15,749 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 15:04:15,749 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 15:04:15,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 15:04:15,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:15,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 15:04:15,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:15,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash 20739, now seen corresponding path program 1 times [2023-08-27 15:04:15,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:15,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032356170] [2023-08-27 15:04:15,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:15,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:16,012 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 15:04:16,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:16,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032356170] [2023-08-27 15:04:16,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032356170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:16,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:04:16,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:04:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35158418] [2023-08-27 15:04:16,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:04:16,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:16,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:04:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:04:16,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 15:04:16,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 15:04:16,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:16,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 15:04:16,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:16,187 INFO L124 PetriNetUnfolderBase]: 109/186 cut-off events. [2023-08-27 15:04:16,187 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-27 15:04:16,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 186 events. 109/186 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 615 event pairs, 63 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 305. Up to 181 conditions per place. [2023-08-27 15:04:16,192 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 21 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-27 15:04:16,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 110 flow [2023-08-27 15:04:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:04:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:04:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-27 15:04:16,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169570267131243 [2023-08-27 15:04:16,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-27 15:04:16,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-27 15:04:16,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:16,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-27 15:04:16,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states 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 15:04:16,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:16,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:16,223 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 64 flow. Second operand 3 states and 359 transitions. [2023-08-27 15:04:16,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 110 flow [2023-08-27 15:04:16,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 15:04:16,227 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 71 flow [2023-08-27 15:04:16,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-27 15:04:16,231 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-27 15:04:16,231 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 71 flow [2023-08-27 15:04:16,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 15:04:16,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:16,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 15:04:16,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 15:04:16,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:16,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash 644222, now seen corresponding path program 1 times [2023-08-27 15:04:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:16,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550226219] [2023-08-27 15:04:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:16,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:16,338 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 15:04:16,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550226219] [2023-08-27 15:04:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550226219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370459832] [2023-08-27 15:04:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:16,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:16,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:16,341 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 15:04:16,371 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 15:04:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:16,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:04:16,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:16,502 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 15:04:16,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:16,519 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 15:04:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370459832] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:16,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:16,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 15:04:16,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835456597] [2023-08-27 15:04:16,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:16,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 15:04:16,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:16,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 15:04:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 15:04:16,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 15:04:16,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 111.14285714285714) internal successors, (778), 7 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:16,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:16,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 15:04:16,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:16,631 INFO L124 PetriNetUnfolderBase]: 115/195 cut-off events. [2023-08-27 15:04:16,632 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 15:04:16,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 195 events. 115/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 636 event pairs, 63 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 359. Up to 183 conditions per place. [2023-08-27 15:04:16,634 INFO L140 encePairwiseOnDemand]: 282/287 looper letters, 20 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2023-08-27 15:04:16,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 173 flow [2023-08-27 15:04:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 15:04:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 15:04:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 806 transitions. [2023-08-27 15:04:16,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011946241911399 [2023-08-27 15:04:16,638 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 806 transitions. [2023-08-27 15:04:16,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 806 transitions. [2023-08-27 15:04:16,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:16,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 806 transitions. [2023-08-27 15:04:16,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states 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 15:04:16,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 287.0) internal successors, (2296), 8 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 15:04:16,646 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 287.0) internal successors, (2296), 8 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states 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 15:04:16,646 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 71 flow. Second operand 7 states and 806 transitions. [2023-08-27 15:04:16,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 173 flow [2023-08-27 15:04:16,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 168 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 15:04:16,647 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 150 flow [2023-08-27 15:04:16,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-27 15:04:16,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-27 15:04:16,648 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 150 flow [2023-08-27 15:04:16,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.14285714285714) internal successors, (778), 7 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:16,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:16,649 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 15:04:16,655 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 15:04:16,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:16,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:16,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:16,858 INFO L85 PathProgramCache]: Analyzing trace with hash 19971843, now seen corresponding path program 1 times [2023-08-27 15:04:16,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037432032] [2023-08-27 15:04:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:16,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:04:16,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:16,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037432032] [2023-08-27 15:04:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037432032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:16,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:04:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:04:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104687070] [2023-08-27 15:04:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:16,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:04:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:04:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:04:16,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 15:04:16,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 15:04:16,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:16,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 15:04:16,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:16,989 INFO L124 PetriNetUnfolderBase]: 112/191 cut-off events. [2023-08-27 15:04:16,990 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 15:04:16,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 191 events. 112/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 624 event pairs, 63 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 385. Up to 180 conditions per place. [2023-08-27 15:04:16,991 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 23 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-08-27 15:04:16,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 181 flow [2023-08-27 15:04:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:04:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:04:16,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-27 15:04:16,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088269454123113 [2023-08-27 15:04:16,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-27 15:04:16,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-27 15:04:16,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:16,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-27 15:04:16,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 15:04:16,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:16,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:16,996 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 150 flow. Second operand 3 states and 352 transitions. [2023-08-27 15:04:16,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 181 flow [2023-08-27 15:04:16,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 160 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 15:04:16,999 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 114 flow [2023-08-27 15:04:16,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-27 15:04:17,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-27 15:04:17,000 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 114 flow [2023-08-27 15:04:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 15:04:17,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:17,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 15:04:17,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 15:04:17,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:17,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:17,003 INFO L85 PathProgramCache]: Analyzing trace with hash 19961701, now seen corresponding path program 1 times [2023-08-27 15:04:17,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:17,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59441471] [2023-08-27 15:04:17,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:17,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:17,125 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 15:04:17,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:17,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59441471] [2023-08-27 15:04:17,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59441471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:17,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:04:17,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:04:17,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233434375] [2023-08-27 15:04:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:17,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:04:17,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:04:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:04:17,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 15:04:17,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 15:04:17,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:17,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 15:04:17,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:17,197 INFO L124 PetriNetUnfolderBase]: 100/189 cut-off events. [2023-08-27 15:04:17,198 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-27 15:04:17,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 189 events. 100/189 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 674 event pairs, 39 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 380. Up to 125 conditions per place. [2023-08-27 15:04:17,202 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 15:04:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 214 flow [2023-08-27 15:04:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:04:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:04:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-27 15:04:17,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42392566782810687 [2023-08-27 15:04:17,204 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-27 15:04:17,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-27 15:04:17,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:17,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-27 15:04:17,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states 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 15:04:17,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:17,207 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:17,207 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 114 flow. Second operand 3 states and 365 transitions. [2023-08-27 15:04:17,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 214 flow [2023-08-27 15:04:17,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:04:17,210 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 120 flow [2023-08-27 15:04:17,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-27 15:04:17,211 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-27 15:04:17,211 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 120 flow [2023-08-27 15:04:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states 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 15:04:17,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:17,211 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 15:04:17,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 15:04:17,212 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:17,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash 2013113614, now seen corresponding path program 2 times [2023-08-27 15:04:17,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621380207] [2023-08-27 15:04:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:17,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:17,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621380207] [2023-08-27 15:04:17,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621380207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:17,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425121353] [2023-08-27 15:04:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:04:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:17,309 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 15:04:17,329 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 15:04:17,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:04:17,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:17,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 15:04:17,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:04:17,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:04:17,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425121353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:17,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:04:17,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 15:04:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350755529] [2023-08-27 15:04:17,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:04:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:04:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 15:04:17,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 287 [2023-08-27 15:04:17,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 15:04:17,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:17,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 287 [2023-08-27 15:04:17,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:17,437 INFO L124 PetriNetUnfolderBase]: 100/188 cut-off events. [2023-08-27 15:04:17,438 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-27 15:04:17,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 188 events. 100/188 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 677 event pairs, 75 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 433. Up to 186 conditions per place. [2023-08-27 15:04:17,439 INFO L140 encePairwiseOnDemand]: 285/287 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-27 15:04:17,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 168 flow [2023-08-27 15:04:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:04:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:04:17,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-27 15:04:17,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2023-08-27 15:04:17,441 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-27 15:04:17,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-27 15:04:17,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:17,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-27 15:04:17,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states 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 15:04:17,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:17,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:17,445 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 120 flow. Second operand 3 states and 354 transitions. [2023-08-27 15:04:17,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 168 flow [2023-08-27 15:04:17,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 150 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 15:04:17,447 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 94 flow [2023-08-27 15:04:17,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-08-27 15:04:17,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-08-27 15:04:17,449 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 94 flow [2023-08-27 15:04:17,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states 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 15:04:17,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:17,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:17,460 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 15:04:17,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:17,655 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:17,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:17,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1974221235, now seen corresponding path program 1 times [2023-08-27 15:04:17,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:17,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947992608] [2023-08-27 15:04:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:17,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:17,735 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 15:04:17,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:17,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947992608] [2023-08-27 15:04:17,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947992608] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:17,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:04:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:04:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844455098] [2023-08-27 15:04:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:04:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:04:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 15:04:17,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 287 [2023-08-27 15:04:17,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 15:04:17,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:17,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 287 [2023-08-27 15:04:17,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:17,810 INFO L124 PetriNetUnfolderBase]: 108/217 cut-off events. [2023-08-27 15:04:17,810 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-27 15:04:17,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 217 events. 108/217 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 834 event pairs, 84 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 490. Up to 185 conditions per place. [2023-08-27 15:04:17,812 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-27 15:04:17,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 196 flow [2023-08-27 15:04:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:04:17,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:04:17,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-27 15:04:17,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858885017421603 [2023-08-27 15:04:17,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-27 15:04:17,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-27 15:04:17,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:17,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-27 15:04:17,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 15:04:17,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:17,817 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:17,817 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 94 flow. Second operand 4 states and 443 transitions. [2023-08-27 15:04:17,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 196 flow [2023-08-27 15:04:17,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:04:17,819 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2023-08-27 15:04:17,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-27 15:04:17,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-27 15:04:17,822 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2023-08-27 15:04:17,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states 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 15:04:17,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:17,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:17,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 15:04:17,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:17,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:17,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1564171331, now seen corresponding path program 1 times [2023-08-27 15:04:17,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:17,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834564393] [2023-08-27 15:04:17,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:17,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:17,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:17,902 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 15:04:17,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834564393] [2023-08-27 15:04:17,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834564393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:17,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298996123] [2023-08-27 15:04:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:17,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:17,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:17,905 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 15:04:17,933 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 15:04:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:17,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:04:17,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:17,996 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 15:04:17,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:04:17,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298996123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:17,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:04:17,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 15:04:17,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756936174] [2023-08-27 15:04:17,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:04:17,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:17,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:04:17,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 15:04:17,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 287 [2023-08-27 15:04:17,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 15:04:17,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:17,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 287 [2023-08-27 15:04:17,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:18,031 INFO L124 PetriNetUnfolderBase]: 56/125 cut-off events. [2023-08-27 15:04:18,032 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-27 15:04:18,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 125 events. 56/125 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 388 event pairs, 38 based on Foata normal form. 16/132 useless extension candidates. Maximal degree in co-relation 292. Up to 121 conditions per place. [2023-08-27 15:04:18,033 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 25 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-27 15:04:18,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 146 flow [2023-08-27 15:04:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:04:18,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:04:18,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-27 15:04:18,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42044134727061555 [2023-08-27 15:04:18,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-27 15:04:18,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-27 15:04:18,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:18,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-27 15:04:18,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 15:04:18,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:18,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states 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 15:04:18,037 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 3 states and 362 transitions. [2023-08-27 15:04:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 146 flow [2023-08-27 15:04:18,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 141 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:04:18,040 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 91 flow [2023-08-27 15:04:18,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-27 15:04:18,041 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-08-27 15:04:18,041 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 91 flow [2023-08-27 15:04:18,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 15:04:18,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:18,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:18,050 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 15:04:18,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:18,248 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:18,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1244671710, now seen corresponding path program 1 times [2023-08-27 15:04:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:18,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059391011] [2023-08-27 15:04:18,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:18,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:18,714 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 15:04:18,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:18,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059391011] [2023-08-27 15:04:18,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059391011] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:18,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402666936] [2023-08-27 15:04:18,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:18,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:18,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:18,716 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 15:04:18,718 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 15:04:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:18,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 15:04:18,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:18,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:04:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:04:18,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:04:19,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:04:19,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:04:19,125 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 15:04:19,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:21,320 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:21,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-08-27 15:04:21,332 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:21,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 85 [2023-08-27 15:04:21,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-27 15:04:21,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-27 15:04:21,433 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 15:04:21,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402666936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:21,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:21,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 15:04:21,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617885134] [2023-08-27 15:04:21,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:21,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:04:21,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:21,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:04:21,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2023-08-27 15:04:21,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:04:21,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 91 flow. Second operand has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 15:04:21,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:21,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:04:21,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:23,051 INFO L124 PetriNetUnfolderBase]: 222/435 cut-off events. [2023-08-27 15:04:23,051 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-27 15:04:23,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 435 events. 222/435 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1852 event pairs, 27 based on Foata normal form. 4/406 useless extension candidates. Maximal degree in co-relation 1029. Up to 125 conditions per place. [2023-08-27 15:04:23,053 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 67 selfloop transitions, 20 changer transitions 33/120 dead transitions. [2023-08-27 15:04:23,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 120 transitions, 581 flow [2023-08-27 15:04:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 15:04:23,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 15:04:23,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1475 transitions. [2023-08-27 15:04:23,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28552071234998067 [2023-08-27 15:04:23,058 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1475 transitions. [2023-08-27 15:04:23,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1475 transitions. [2023-08-27 15:04:23,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:23,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1475 transitions. [2023-08-27 15:04:23,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 81.94444444444444) internal successors, (1475), 18 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states 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 15:04:23,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states 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 15:04:23,070 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states 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 15:04:23,070 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 91 flow. Second operand 18 states and 1475 transitions. [2023-08-27 15:04:23,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 120 transitions, 581 flow [2023-08-27 15:04:23,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 120 transitions, 580 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:04:23,073 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 238 flow [2023-08-27 15:04:23,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=238, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-27 15:04:23,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-08-27 15:04:23,074 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 238 flow [2023-08-27 15:04:23,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 15:04:23,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:23,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:23,084 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 15:04:23,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:23,280 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:23,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:23,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1244671711, now seen corresponding path program 1 times [2023-08-27 15:04:23,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:23,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820096804] [2023-08-27 15:04:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:23,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:23,731 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 15:04:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820096804] [2023-08-27 15:04:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820096804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3066535] [2023-08-27 15:04:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:23,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:23,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:23,737 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 15:04:23,745 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 15:04:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:23,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 15:04:23,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:23,870 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 15:04:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:04:23,919 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 15:04:23,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:04:23,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 15:04:24,041 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 15:04:24,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:26,203 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:26,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-27 15:04:26,213 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:26,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-08-27 15:04:26,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-27 15:04:26,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-27 15:04:26,290 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 15:04:26,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3066535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:26,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:26,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 15:04:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894224822] [2023-08-27 15:04:26,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:26,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:04:26,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:04:26,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2023-08-27 15:04:26,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:04:26,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 238 flow. Second operand has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 15:04:26,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:26,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:04:26,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:27,286 INFO L124 PetriNetUnfolderBase]: 189/374 cut-off events. [2023-08-27 15:04:27,286 INFO L125 PetriNetUnfolderBase]: For 414/414 co-relation queries the response was YES. [2023-08-27 15:04:27,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 374 events. 189/374 cut-off events. For 414/414 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1561 event pairs, 23 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 1167. Up to 107 conditions per place. [2023-08-27 15:04:27,289 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 64 selfloop transitions, 21 changer transitions 17/102 dead transitions. [2023-08-27 15:04:27,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 655 flow [2023-08-27 15:04:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 15:04:27,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 15:04:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1226 transitions. [2023-08-27 15:04:27,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28478513356562135 [2023-08-27 15:04:27,294 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1226 transitions. [2023-08-27 15:04:27,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1226 transitions. [2023-08-27 15:04:27,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:27,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1226 transitions. [2023-08-27 15:04:27,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 81.73333333333333) internal successors, (1226), 15 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states 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 15:04:27,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 287.0) internal successors, (4592), 16 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states 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 15:04:27,304 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 287.0) internal successors, (4592), 16 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states 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 15:04:27,304 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 238 flow. Second operand 15 states and 1226 transitions. [2023-08-27 15:04:27,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 655 flow [2023-08-27 15:04:27,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 102 transitions, 616 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-27 15:04:27,309 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 280 flow [2023-08-27 15:04:27,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=280, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-27 15:04:27,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2023-08-27 15:04:27,310 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 280 flow [2023-08-27 15:04:27,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states 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 15:04:27,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:27,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:27,316 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 15:04:27,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:27,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:27,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:27,517 INFO L85 PathProgramCache]: Analyzing trace with hash -69881949, now seen corresponding path program 1 times [2023-08-27 15:04:27,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:27,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976991740] [2023-08-27 15:04:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:27,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:27,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976991740] [2023-08-27 15:04:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976991740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310557865] [2023-08-27 15:04:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:27,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:27,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:27,661 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 15:04:27,663 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 15:04:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:27,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 15:04:27,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:27,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:27,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:27,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310557865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:27,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:27,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 15:04:27,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827438202] [2023-08-27 15:04:27,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:27,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:04:27,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:27,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:04:27,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-27 15:04:27,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 287 [2023-08-27 15:04:27,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 280 flow. Second operand has 17 states, 17 states have (on average 99.58823529411765) internal successors, (1693), 17 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 15:04:27,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:27,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 287 [2023-08-27 15:04:27,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:28,160 INFO L124 PetriNetUnfolderBase]: 171/356 cut-off events. [2023-08-27 15:04:28,160 INFO L125 PetriNetUnfolderBase]: For 694/694 co-relation queries the response was YES. [2023-08-27 15:04:28,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1137 conditions, 356 events. 171/356 cut-off events. For 694/694 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1547 event pairs, 59 based on Foata normal form. 40/391 useless extension candidates. Maximal degree in co-relation 1116. Up to 154 conditions per place. [2023-08-27 15:04:28,163 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 47 selfloop transitions, 9 changer transitions 9/67 dead transitions. [2023-08-27 15:04:28,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 455 flow [2023-08-27 15:04:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 15:04:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 15:04:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 844 transitions. [2023-08-27 15:04:28,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367595818815331 [2023-08-27 15:04:28,166 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 844 transitions. [2023-08-27 15:04:28,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 844 transitions. [2023-08-27 15:04:28,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:28,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 844 transitions. [2023-08-27 15:04:28,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.5) internal successors, (844), 8 states have internal predecessors, (844), 0 states have call successors, (0), 0 states 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 15:04:28,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 15:04:28,171 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 15:04:28,171 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 280 flow. Second operand 8 states and 844 transitions. [2023-08-27 15:04:28,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 455 flow [2023-08-27 15:04:28,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 415 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-08-27 15:04:28,175 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 229 flow [2023-08-27 15:04:28,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=229, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2023-08-27 15:04:28,175 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-08-27 15:04:28,175 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 229 flow [2023-08-27 15:04:28,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.58823529411765) internal successors, (1693), 17 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 15:04:28,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:28,176 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:28,187 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 15:04:28,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:28,381 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:28,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:28,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1414004958, now seen corresponding path program 2 times [2023-08-27 15:04:28,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:28,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494661675] [2023-08-27 15:04:28,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:28,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:29,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494661675] [2023-08-27 15:04:29,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494661675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:29,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373661046] [2023-08-27 15:04:29,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:04:29,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:29,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:29,373 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 15:04:29,383 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 15:04:29,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:04:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:29,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 15:04:29,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:04:29,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:04:29,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373661046] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:29,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:04:29,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2023-08-27 15:04:29,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730054017] [2023-08-27 15:04:29,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:29,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:04:29,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:29,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:04:29,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-27 15:04:29,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 287 [2023-08-27 15:04:29,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:29,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:29,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 287 [2023-08-27 15:04:29,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:29,642 INFO L124 PetriNetUnfolderBase]: 193/396 cut-off events. [2023-08-27 15:04:29,642 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2023-08-27 15:04:29,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1302 conditions, 396 events. 193/396 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1753 event pairs, 45 based on Foata normal form. 4/391 useless extension candidates. Maximal degree in co-relation 1280. Up to 171 conditions per place. [2023-08-27 15:04:29,644 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 44 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2023-08-27 15:04:29,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 408 flow [2023-08-27 15:04:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:04:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:04:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2023-08-27 15:04:29,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2023-08-27 15:04:29,646 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 444 transitions. [2023-08-27 15:04:29,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 444 transitions. [2023-08-27 15:04:29,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:29,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 444 transitions. [2023-08-27 15:04:29,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states 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 15:04:29,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:29,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:29,650 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 229 flow. Second operand 4 states and 444 transitions. [2023-08-27 15:04:29,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 408 flow [2023-08-27 15:04:29,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 390 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 15:04:29,654 INFO L231 Difference]: Finished difference. Result has 55 places, 38 transitions, 250 flow [2023-08-27 15:04:29,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=55, PETRI_TRANSITIONS=38} [2023-08-27 15:04:29,655 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-27 15:04:29,655 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 38 transitions, 250 flow [2023-08-27 15:04:29,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:29,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:29,655 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:29,663 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 15:04:29,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:29,860 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:29,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:29,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1414004959, now seen corresponding path program 2 times [2023-08-27 15:04:29,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172485048] [2023-08-27 15:04:29,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:29,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:31,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:31,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172485048] [2023-08-27 15:04:31,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172485048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:31,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600558815] [2023-08-27 15:04:31,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:04:31,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:31,233 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 15:04:31,260 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 15:04:31,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:04:31,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:31,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 15:04:31,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:31,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:04:31,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:04:31,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600558815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:31,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:04:31,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-08-27 15:04:31,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949109516] [2023-08-27 15:04:31,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:31,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:04:31,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:31,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:04:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-08-27 15:04:31,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 287 [2023-08-27 15:04:31,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 38 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:31,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:31,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 287 [2023-08-27 15:04:31,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:31,503 INFO L124 PetriNetUnfolderBase]: 187/386 cut-off events. [2023-08-27 15:04:31,504 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2023-08-27 15:04:31,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1262 conditions, 386 events. 187/386 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1708 event pairs, 43 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 1239. Up to 171 conditions per place. [2023-08-27 15:04:31,506 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 43 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2023-08-27 15:04:31,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 404 flow [2023-08-27 15:04:31,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:04:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:04:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-27 15:04:31,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858885017421603 [2023-08-27 15:04:31,508 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-27 15:04:31,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-27 15:04:31,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:31,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-27 15:04:31,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 15:04:31,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:31,511 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:31,511 INFO L175 Difference]: Start difference. First operand has 55 places, 38 transitions, 250 flow. Second operand 4 states and 443 transitions. [2023-08-27 15:04:31,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 404 flow [2023-08-27 15:04:31,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 15:04:31,515 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 264 flow [2023-08-27 15:04:31,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=264, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2023-08-27 15:04:31,515 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2023-08-27 15:04:31,515 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 264 flow [2023-08-27 15:04:31,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:31,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:31,527 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 15:04:31,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 15:04:31,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:31,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:31,729 INFO L85 PathProgramCache]: Analyzing trace with hash -979582188, now seen corresponding path program 1 times [2023-08-27 15:04:31,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:31,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896873167] [2023-08-27 15:04:31,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:31,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:04:31,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:31,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896873167] [2023-08-27 15:04:31,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896873167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:31,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666161753] [2023-08-27 15:04:31,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:31,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:31,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:31,820 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 15:04:31,822 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 15:04:31,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:31,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 15:04:31,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:31,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 98 [2023-08-27 15:04:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:04:31,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:04:31,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666161753] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:04:31,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:04:31,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-27 15:04:31,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287985486] [2023-08-27 15:04:31,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:04:31,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 15:04:31,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:31,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 15:04:31,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-27 15:04:31,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 287 [2023-08-27 15:04:31,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:31,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:31,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 287 [2023-08-27 15:04:31,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:32,093 INFO L124 PetriNetUnfolderBase]: 271/548 cut-off events. [2023-08-27 15:04:32,093 INFO L125 PetriNetUnfolderBase]: For 1290/1290 co-relation queries the response was YES. [2023-08-27 15:04:32,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1862 conditions, 548 events. 271/548 cut-off events. For 1290/1290 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2647 event pairs, 71 based on Foata normal form. 12/551 useless extension candidates. Maximal degree in co-relation 1838. Up to 252 conditions per place. [2023-08-27 15:04:32,097 INFO L140 encePairwiseOnDemand]: 282/287 looper letters, 45 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2023-08-27 15:04:32,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 508 flow [2023-08-27 15:04:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:04:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:04:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-27 15:04:32,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42770034843205573 [2023-08-27 15:04:32,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-27 15:04:32,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-27 15:04:32,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:32,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-27 15:04:32,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states 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 15:04:32,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:32,102 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:32,102 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 264 flow. Second operand 4 states and 491 transitions. [2023-08-27 15:04:32,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 508 flow [2023-08-27 15:04:32,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 488 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 15:04:32,106 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 358 flow [2023-08-27 15:04:32,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-27 15:04:32,107 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2023-08-27 15:04:32,107 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 358 flow [2023-08-27 15:04:32,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:32,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:32,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:32,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 15:04:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 15:04:32,316 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:32,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash -302245329, now seen corresponding path program 2 times [2023-08-27 15:04:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:32,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410830445] [2023-08-27 15:04:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:32,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:32,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410830445] [2023-08-27 15:04:32,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410830445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:32,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886919287] [2023-08-27 15:04:32,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:04:32,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:32,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:32,837 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 15:04:32,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 15:04:32,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:04:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:32,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 15:04:32,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:33,043 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 15:04:33,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:04:33,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:04:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:33,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:33,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:33,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 105 [2023-08-27 15:04:33,991 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 15:04:33,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 337 treesize of output 317 [2023-08-27 15:04:34,027 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 15:04:34,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 294 treesize of output 248 [2023-08-27 15:04:34,062 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 15:04:34,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 180 treesize of output 167 [2023-08-27 15:04:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:34,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886919287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:34,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:34,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 15:04:34,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340508044] [2023-08-27 15:04:34,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:34,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 15:04:34,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:34,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 15:04:34,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=592, Unknown=2, NotChecked=0, Total=756 [2023-08-27 15:04:34,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:04:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 358 flow. Second operand has 28 states, 28 states have (on average 76.28571428571429) internal successors, (2136), 28 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states 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 15:04:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:04:34,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:36,461 INFO L124 PetriNetUnfolderBase]: 579/1133 cut-off events. [2023-08-27 15:04:36,461 INFO L125 PetriNetUnfolderBase]: For 2885/2885 co-relation queries the response was YES. [2023-08-27 15:04:36,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4342 conditions, 1133 events. 579/1133 cut-off events. For 2885/2885 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6248 event pairs, 57 based on Foata normal form. 12/1142 useless extension candidates. Maximal degree in co-relation 4316. Up to 313 conditions per place. [2023-08-27 15:04:36,469 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 162 selfloop transitions, 52 changer transitions 0/214 dead transitions. [2023-08-27 15:04:36,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 214 transitions, 1712 flow [2023-08-27 15:04:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 15:04:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 15:04:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2448 transitions. [2023-08-27 15:04:36,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2843205574912892 [2023-08-27 15:04:36,479 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2448 transitions. [2023-08-27 15:04:36,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2448 transitions. [2023-08-27 15:04:36,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:36,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2448 transitions. [2023-08-27 15:04:36,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 81.6) internal successors, (2448), 30 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states 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 15:04:36,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 287.0) internal successors, (8897), 31 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states 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 15:04:36,496 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 287.0) internal successors, (8897), 31 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states 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 15:04:36,496 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 358 flow. Second operand 30 states and 2448 transitions. [2023-08-27 15:04:36,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 214 transitions, 1712 flow [2023-08-27 15:04:36,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 214 transitions, 1712 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 15:04:36,508 INFO L231 Difference]: Finished difference. Result has 97 places, 82 transitions, 1013 flow [2023-08-27 15:04:36,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1013, PETRI_PLACES=97, PETRI_TRANSITIONS=82} [2023-08-27 15:04:36,509 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 67 predicate places. [2023-08-27 15:04:36,509 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 82 transitions, 1013 flow [2023-08-27 15:04:36,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.28571428571429) internal successors, (2136), 28 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states 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 15:04:36,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:36,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:36,522 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 15:04:36,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 15:04:36,722 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:36,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash -302275089, now seen corresponding path program 3 times [2023-08-27 15:04:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497855002] [2023-08-27 15:04:36,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:36,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:37,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497855002] [2023-08-27 15:04:37,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497855002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:37,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844291096] [2023-08-27 15:04:37,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:04:37,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:37,509 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 15:04:37,515 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 15:04:37,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:04:37,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:37,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 15:04:37,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:37,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 15:04:37,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:04:37,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:04:37,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:37,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:38,623 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:38,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 153 treesize of output 105 [2023-08-27 15:04:38,656 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 15:04:38,656 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 715 treesize of output 652 [2023-08-27 15:04:38,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:04:38,675 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:04:38,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:38,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 208 treesize of output 195 [2023-08-27 15:04:38,709 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 15:04:38,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 167 [2023-08-27 15:04:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844291096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:39,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:39,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 15:04:39,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981540324] [2023-08-27 15:04:39,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:39,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 15:04:39,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:39,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 15:04:39,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=639, Unknown=1, NotChecked=0, Total=812 [2023-08-27 15:04:39,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:04:39,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 82 transitions, 1013 flow. Second operand has 29 states, 29 states have (on average 76.24137931034483) internal successors, (2211), 29 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states 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 15:04:39,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:39,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:04:39,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:41,892 INFO L124 PetriNetUnfolderBase]: 659/1274 cut-off events. [2023-08-27 15:04:41,892 INFO L125 PetriNetUnfolderBase]: For 6556/6556 co-relation queries the response was YES. [2023-08-27 15:04:41,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5806 conditions, 1274 events. 659/1274 cut-off events. For 6556/6556 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 7196 event pairs, 61 based on Foata normal form. 17/1288 useless extension candidates. Maximal degree in co-relation 5769. Up to 363 conditions per place. [2023-08-27 15:04:41,903 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 159 selfloop transitions, 63 changer transitions 2/224 dead transitions. [2023-08-27 15:04:41,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 224 transitions, 2129 flow [2023-08-27 15:04:41,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 15:04:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 15:04:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2524 transitions. [2023-08-27 15:04:41,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.283691131842194 [2023-08-27 15:04:41,909 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2524 transitions. [2023-08-27 15:04:41,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2524 transitions. [2023-08-27 15:04:41,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:41,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2524 transitions. [2023-08-27 15:04:41,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 81.41935483870968) internal successors, (2524), 31 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states 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 15:04:41,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 287.0) internal successors, (9184), 32 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states 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 15:04:41,923 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 287.0) internal successors, (9184), 32 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states 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 15:04:41,923 INFO L175 Difference]: Start difference. First operand has 97 places, 82 transitions, 1013 flow. Second operand 31 states and 2524 transitions. [2023-08-27 15:04:41,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 224 transitions, 2129 flow [2023-08-27 15:04:41,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 224 transitions, 1909 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-08-27 15:04:41,948 INFO L231 Difference]: Finished difference. Result has 130 places, 94 transitions, 1209 flow [2023-08-27 15:04:41,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1209, PETRI_PLACES=130, PETRI_TRANSITIONS=94} [2023-08-27 15:04:41,949 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2023-08-27 15:04:41,949 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 94 transitions, 1209 flow [2023-08-27 15:04:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.24137931034483) internal successors, (2211), 29 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states 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 15:04:41,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:41,950 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:41,956 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 15:04:42,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 15:04:42,155 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:42,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash -779668941, now seen corresponding path program 2 times [2023-08-27 15:04:42,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339973993] [2023-08-27 15:04:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:42,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:42,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:42,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339973993] [2023-08-27 15:04:42,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339973993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:42,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866468736] [2023-08-27 15:04:42,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:04:42,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:42,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:42,323 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 15:04:42,326 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 15:04:42,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:04:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:42,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 15:04:42,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:42,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:42,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 132 [2023-08-27 15:04:42,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:42,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:42,862 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 15:04:42,863 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 161 [2023-08-27 15:04:42,971 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:42,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866468736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:42,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:42,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 15:04:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004419783] [2023-08-27 15:04:42,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:42,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 15:04:42,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 15:04:42,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-08-27 15:04:42,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 287 [2023-08-27 15:04:42,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 94 transitions, 1209 flow. Second operand has 18 states, 18 states have (on average 89.61111111111111) internal successors, (1613), 18 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states 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 15:04:42,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:42,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 287 [2023-08-27 15:04:42,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:43,315 INFO L124 PetriNetUnfolderBase]: 471/967 cut-off events. [2023-08-27 15:04:43,315 INFO L125 PetriNetUnfolderBase]: For 6404/6404 co-relation queries the response was YES. [2023-08-27 15:04:43,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4297 conditions, 967 events. 471/967 cut-off events. For 6404/6404 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5246 event pairs, 271 based on Foata normal form. 56/1022 useless extension candidates. Maximal degree in co-relation 4252. Up to 553 conditions per place. [2023-08-27 15:04:43,321 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 84 selfloop transitions, 12 changer transitions 2/98 dead transitions. [2023-08-27 15:04:43,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 98 transitions, 1215 flow [2023-08-27 15:04:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 15:04:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 15:04:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 758 transitions. [2023-08-27 15:04:43,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33013937282229966 [2023-08-27 15:04:43,324 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 758 transitions. [2023-08-27 15:04:43,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 758 transitions. [2023-08-27 15:04:43,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:43,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 758 transitions. [2023-08-27 15:04:43,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 94.75) internal successors, (758), 8 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:43,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 15:04:43,328 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 15:04:43,328 INFO L175 Difference]: Start difference. First operand has 130 places, 94 transitions, 1209 flow. Second operand 8 states and 758 transitions. [2023-08-27 15:04:43,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 98 transitions, 1215 flow [2023-08-27 15:04:43,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 98 transitions, 1095 flow, removed 27 selfloop flow, removed 24 redundant places. [2023-08-27 15:04:43,353 INFO L231 Difference]: Finished difference. Result has 108 places, 76 transitions, 838 flow [2023-08-27 15:04:43,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=838, PETRI_PLACES=108, PETRI_TRANSITIONS=76} [2023-08-27 15:04:43,354 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 78 predicate places. [2023-08-27 15:04:43,354 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 76 transitions, 838 flow [2023-08-27 15:04:43,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 89.61111111111111) internal successors, (1613), 18 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states 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 15:04:43,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:43,355 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:43,361 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 15:04:43,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 15:04:43,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:43,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash -302245330, now seen corresponding path program 3 times [2023-08-27 15:04:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:43,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450377834] [2023-08-27 15:04:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450377834] [2023-08-27 15:04:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450377834] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910269370] [2023-08-27 15:04:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:04:44,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:44,350 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 15:04:44,352 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 15:04:44,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:04:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:44,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:04:44,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:44,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:04:44,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:04:44,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:04:44,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:04:44,634 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:04:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:44,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:45,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:45,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-08-27 15:04:45,992 INFO L322 Elim1Store]: treesize reduction 18, result has 77.2 percent of original size [2023-08-27 15:04:45,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 575 treesize of output 561 [2023-08-27 15:04:46,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:04:46,015 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:04:46,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:46,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 182 [2023-08-27 15:04:46,078 INFO L322 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-27 15:04:46,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 155 [2023-08-27 15:04:48,588 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:48,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910269370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:48,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:48,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 15:04:48,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739883515] [2023-08-27 15:04:48,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:48,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 15:04:48,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:48,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 15:04:48,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=609, Unknown=2, NotChecked=0, Total=812 [2023-08-27 15:04:48,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:04:48,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 76 transitions, 838 flow. Second operand has 29 states, 29 states have (on average 76.24137931034483) internal successors, (2211), 29 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states 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 15:04:48,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:48,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:04:48,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:51,999 INFO L124 PetriNetUnfolderBase]: 505/1041 cut-off events. [2023-08-27 15:04:52,000 INFO L125 PetriNetUnfolderBase]: For 5966/5966 co-relation queries the response was YES. [2023-08-27 15:04:52,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4285 conditions, 1041 events. 505/1041 cut-off events. For 5966/5966 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 5751 event pairs, 95 based on Foata normal form. 25/1065 useless extension candidates. Maximal degree in co-relation 4242. Up to 437 conditions per place. [2023-08-27 15:04:52,006 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 134 selfloop transitions, 44 changer transitions 6/184 dead transitions. [2023-08-27 15:04:52,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 184 transitions, 1598 flow [2023-08-27 15:04:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 15:04:52,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 15:04:52,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2037 transitions. [2023-08-27 15:04:52,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2839024390243902 [2023-08-27 15:04:52,010 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2037 transitions. [2023-08-27 15:04:52,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2037 transitions. [2023-08-27 15:04:52,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:52,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2037 transitions. [2023-08-27 15:04:52,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 81.48) internal successors, (2037), 25 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:52,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 287.0) internal successors, (7462), 26 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states 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 15:04:52,020 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 287.0) internal successors, (7462), 26 states have internal predecessors, (7462), 0 states have call successors, (0), 0 states 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 15:04:52,020 INFO L175 Difference]: Start difference. First operand has 108 places, 76 transitions, 838 flow. Second operand 25 states and 2037 transitions. [2023-08-27 15:04:52,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 184 transitions, 1598 flow [2023-08-27 15:04:52,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 1546 flow, removed 13 selfloop flow, removed 9 redundant places. [2023-08-27 15:04:52,042 INFO L231 Difference]: Finished difference. Result has 123 places, 81 transitions, 963 flow [2023-08-27 15:04:52,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=963, PETRI_PLACES=123, PETRI_TRANSITIONS=81} [2023-08-27 15:04:52,043 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2023-08-27 15:04:52,043 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 81 transitions, 963 flow [2023-08-27 15:04:52,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.24137931034483) internal successors, (2211), 29 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states 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 15:04:52,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:52,044 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:52,052 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 15:04:52,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 15:04:52,253 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:52,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:52,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1649122654, now seen corresponding path program 4 times [2023-08-27 15:04:52,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:52,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86487754] [2023-08-27 15:04:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:52,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:53,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86487754] [2023-08-27 15:04:53,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86487754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:53,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618690096] [2023-08-27 15:04:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:04:53,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:53,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:53,188 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 15:04:53,204 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 15:04:53,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:04:53,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:53,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 15:04:53,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:04:53,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:53,762 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 15:04:53,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 213 treesize of output 184 [2023-08-27 15:04:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:04:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618690096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:54,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:54,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 19 [2023-08-27 15:04:54,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691971723] [2023-08-27 15:04:54,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:54,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 15:04:54,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:54,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 15:04:54,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-08-27 15:04:54,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 15:04:54,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 81 transitions, 963 flow. Second operand has 21 states, 21 states have (on average 83.76190476190476) internal successors, (1759), 21 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states 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 15:04:54,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:54,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 15:04:54,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:55,271 INFO L124 PetriNetUnfolderBase]: 757/1524 cut-off events. [2023-08-27 15:04:55,271 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 15:04:55,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6901 conditions, 1524 events. 757/1524 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9059 event pairs, 84 based on Foata normal form. 43/1566 useless extension candidates. Maximal degree in co-relation 6857. Up to 317 conditions per place. [2023-08-27 15:04:55,281 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 156 selfloop transitions, 67 changer transitions 3/226 dead transitions. [2023-08-27 15:04:55,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 226 transitions, 2484 flow [2023-08-27 15:04:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 15:04:55,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 15:04:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2062 transitions. [2023-08-27 15:04:55,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3123769125890017 [2023-08-27 15:04:55,285 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2062 transitions. [2023-08-27 15:04:55,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2062 transitions. [2023-08-27 15:04:55,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:55,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2062 transitions. [2023-08-27 15:04:55,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 89.65217391304348) internal successors, (2062), 23 states have internal predecessors, (2062), 0 states have call successors, (0), 0 states 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 15:04:55,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 287.0) internal successors, (6888), 24 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states 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 15:04:55,294 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 287.0) internal successors, (6888), 24 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states 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 15:04:55,294 INFO L175 Difference]: Start difference. First operand has 123 places, 81 transitions, 963 flow. Second operand 23 states and 2062 transitions. [2023-08-27 15:04:55,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 226 transitions, 2484 flow [2023-08-27 15:04:55,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 226 transitions, 2238 flow, removed 78 selfloop flow, removed 21 redundant places. [2023-08-27 15:04:55,329 INFO L231 Difference]: Finished difference. Result has 133 places, 103 transitions, 1453 flow [2023-08-27 15:04:55,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1453, PETRI_PLACES=133, PETRI_TRANSITIONS=103} [2023-08-27 15:04:55,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 103 predicate places. [2023-08-27 15:04:55,330 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 103 transitions, 1453 flow [2023-08-27 15:04:55,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 83.76190476190476) internal successors, (1759), 21 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states 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 15:04:55,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:55,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:55,336 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 15:04:55,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:55,536 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:04:55,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:55,537 INFO L85 PathProgramCache]: Analyzing trace with hash -36008417, now seen corresponding path program 4 times [2023-08-27 15:04:55,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:55,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298625697] [2023-08-27 15:04:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:55,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:55,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:56,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:56,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298625697] [2023-08-27 15:04:56,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298625697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:56,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955698450] [2023-08-27 15:04:56,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:04:56,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:56,773 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 15:04:56,783 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 15:04:56,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:04:56,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:56,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 15:04:56,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:57,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:57,767 INFO L322 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2023-08-27 15:04:57,767 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 293 treesize of output 229 [2023-08-27 15:04:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:58,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955698450] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:58,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:58,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2023-08-27 15:04:58,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140908103] [2023-08-27 15:04:58,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:58,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 15:04:58,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 15:04:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 15:04:58,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:04:58,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 103 transitions, 1453 flow. Second operand has 34 states, 34 states have (on average 76.32352941176471) internal successors, (2595), 34 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states 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 15:04:58,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:58,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:04:58,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:05:01,872 INFO L124 PetriNetUnfolderBase]: 1239/2422 cut-off events. [2023-08-27 15:05:01,872 INFO L125 PetriNetUnfolderBase]: For 23828/23828 co-relation queries the response was YES. [2023-08-27 15:05:01,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12278 conditions, 2422 events. 1239/2422 cut-off events. For 23828/23828 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15266 event pairs, 118 based on Foata normal form. 70/2491 useless extension candidates. Maximal degree in co-relation 12229. Up to 585 conditions per place. [2023-08-27 15:05:01,893 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 221 selfloop transitions, 114 changer transitions 16/351 dead transitions. [2023-08-27 15:05:01,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 351 transitions, 4390 flow [2023-08-27 15:05:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 15:05:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 15:05:01,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3053 transitions. [2023-08-27 15:05:01,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875035314059704 [2023-08-27 15:05:01,897 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3053 transitions. [2023-08-27 15:05:01,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3053 transitions. [2023-08-27 15:05:01,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:05:01,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3053 transitions. [2023-08-27 15:05:01,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 82.51351351351352) internal successors, (3053), 37 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states 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 15:05:01,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 287.0) internal successors, (10906), 38 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states 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 15:05:01,909 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 287.0) internal successors, (10906), 38 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states 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 15:05:01,909 INFO L175 Difference]: Start difference. First operand has 133 places, 103 transitions, 1453 flow. Second operand 37 states and 3053 transitions. [2023-08-27 15:05:01,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 351 transitions, 4390 flow [2023-08-27 15:05:01,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 351 transitions, 3971 flow, removed 188 selfloop flow, removed 10 redundant places. [2023-08-27 15:05:01,965 INFO L231 Difference]: Finished difference. Result has 175 places, 162 transitions, 2788 flow [2023-08-27 15:05:01,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1258, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2788, PETRI_PLACES=175, PETRI_TRANSITIONS=162} [2023-08-27 15:05:01,966 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2023-08-27 15:05:01,966 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 162 transitions, 2788 flow [2023-08-27 15:05:01,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 76.32352941176471) internal successors, (2595), 34 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states 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 15:05:01,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:05:01,966 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:05:01,971 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 15:05:02,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:02,167 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:05:02,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:05:02,167 INFO L85 PathProgramCache]: Analyzing trace with hash -7438818, now seen corresponding path program 5 times [2023-08-27 15:05:02,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:05:02,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884256024] [2023-08-27 15:05:02,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:05:02,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:05:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:03,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:05:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884256024] [2023-08-27 15:05:03,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884256024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:05:03,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223116686] [2023-08-27 15:05:03,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:05:03,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:03,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:05:03,309 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 15:05:03,312 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 15:05:03,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:05:03,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:05:03,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 15:05:03,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:05:03,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:05:03,525 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:05:03,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:05:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:03,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:05:04,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:04,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 107 [2023-08-27 15:05:04,783 INFO L322 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2023-08-27 15:05:04,783 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 346 treesize of output 330 [2023-08-27 15:05:04,811 INFO L322 Elim1Store]: treesize reduction 36, result has 36.8 percent of original size [2023-08-27 15:05:04,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 302 treesize of output 254 [2023-08-27 15:05:04,840 INFO L322 Elim1Store]: treesize reduction 36, result has 36.8 percent of original size [2023-08-27 15:05:04,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 207 treesize of output 193 [2023-08-27 15:05:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:05,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223116686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:05:05,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:05:05,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 15:05:05,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714390242] [2023-08-27 15:05:05,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:05:05,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 15:05:05,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:05:05,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 15:05:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1190, Unknown=4, NotChecked=0, Total=1406 [2023-08-27 15:05:05,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:05:05,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 162 transitions, 2788 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 15:05:05,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:05:05,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:05:05,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:05:16,641 INFO L124 PetriNetUnfolderBase]: 2928/5554 cut-off events. [2023-08-27 15:05:16,641 INFO L125 PetriNetUnfolderBase]: For 102517/102517 co-relation queries the response was YES. [2023-08-27 15:05:16,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35486 conditions, 5554 events. 2928/5554 cut-off events. For 102517/102517 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38807 event pairs, 280 based on Foata normal form. 168/5720 useless extension candidates. Maximal degree in co-relation 35424. Up to 1633 conditions per place. [2023-08-27 15:05:16,688 INFO L140 encePairwiseOnDemand]: 276/287 looper letters, 562 selfloop transitions, 320 changer transitions 18/900 dead transitions. [2023-08-27 15:05:16,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 900 transitions, 13372 flow [2023-08-27 15:05:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-08-27 15:05:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-08-27 15:05:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 8232 transitions. [2023-08-27 15:05:16,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2868292682926829 [2023-08-27 15:05:16,698 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 8232 transitions. [2023-08-27 15:05:16,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 8232 transitions. [2023-08-27 15:05:16,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:05:16,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 8232 transitions. [2023-08-27 15:05:16,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 82.32) internal successors, (8232), 100 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states 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 15:05:16,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 287.0) internal successors, (28987), 101 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states 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 15:05:16,731 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 287.0) internal successors, (28987), 101 states have internal predecessors, (28987), 0 states have call successors, (0), 0 states 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 15:05:16,731 INFO L175 Difference]: Start difference. First operand has 175 places, 162 transitions, 2788 flow. Second operand 100 states and 8232 transitions. [2023-08-27 15:05:16,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 900 transitions, 13372 flow [2023-08-27 15:05:17,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 900 transitions, 11604 flow, removed 843 selfloop flow, removed 13 redundant places. [2023-08-27 15:05:17,033 INFO L231 Difference]: Finished difference. Result has 292 places, 422 transitions, 8639 flow [2023-08-27 15:05:17,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=8639, PETRI_PLACES=292, PETRI_TRANSITIONS=422} [2023-08-27 15:05:17,034 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 262 predicate places. [2023-08-27 15:05:17,034 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 422 transitions, 8639 flow [2023-08-27 15:05:17,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 15:05:17,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:05:17,035 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:05:17,041 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 15:05:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:17,240 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:05:17,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:05:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -415882012, now seen corresponding path program 5 times [2023-08-27 15:05:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:05:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055136166] [2023-08-27 15:05:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:05:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:05:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:05:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:05:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055136166] [2023-08-27 15:05:17,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055136166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:05:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592602255] [2023-08-27 15:05:17,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:05:17,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:05:17,379 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 15:05:17,382 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 15:05:17,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:05:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:05:17,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 15:05:17,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:05:17,624 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:17,624 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 132 [2023-08-27 15:05:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:05:17,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:05:17,994 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 15:05:17,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 205 treesize of output 157 [2023-08-27 15:05:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:05:18,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592602255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:05:18,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:05:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-27 15:05:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117698223] [2023-08-27 15:05:18,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:05:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 15:05:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:05:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 15:05:18,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2023-08-27 15:05:18,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2023-08-27 15:05:18,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 422 transitions, 8639 flow. Second operand has 16 states, 16 states have (on average 98.875) internal successors, (1582), 16 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states 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 15:05:18,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:05:18,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2023-08-27 15:05:18,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:05:19,914 INFO L124 PetriNetUnfolderBase]: 4190/7920 cut-off events. [2023-08-27 15:05:19,914 INFO L125 PetriNetUnfolderBase]: For 138225/138225 co-relation queries the response was YES. [2023-08-27 15:05:19,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49958 conditions, 7920 events. 4190/7920 cut-off events. For 138225/138225 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 58637 event pairs, 913 based on Foata normal form. 152/8071 useless extension candidates. Maximal degree in co-relation 49864. Up to 4333 conditions per place. [2023-08-27 15:05:19,985 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 444 selfloop transitions, 206 changer transitions 0/650 dead transitions. [2023-08-27 15:05:19,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 650 transitions, 14443 flow [2023-08-27 15:05:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 15:05:19,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 15:05:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-08-27 15:05:19,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37325783972125437 [2023-08-27 15:05:19,987 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-08-27 15:05:19,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-08-27 15:05:19,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:05:19,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-08-27 15:05:19,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:19,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 15:05:19,990 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states 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 15:05:19,990 INFO L175 Difference]: Start difference. First operand has 292 places, 422 transitions, 8639 flow. Second operand 8 states and 857 transitions. [2023-08-27 15:05:19,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 650 transitions, 14443 flow [2023-08-27 15:05:20,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 650 transitions, 10627 flow, removed 1867 selfloop flow, removed 17 redundant places. [2023-08-27 15:05:20,855 INFO L231 Difference]: Finished difference. Result has 287 places, 559 transitions, 8948 flow [2023-08-27 15:05:20,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8948, PETRI_PLACES=287, PETRI_TRANSITIONS=559} [2023-08-27 15:05:20,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2023-08-27 15:05:20,857 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 559 transitions, 8948 flow [2023-08-27 15:05:20,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 98.875) internal successors, (1582), 16 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states 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 15:05:20,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:05:20,857 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:05:20,863 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 15:05:21,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:21,063 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:05:21,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:05:21,063 INFO L85 PathProgramCache]: Analyzing trace with hash -415851261, now seen corresponding path program 6 times [2023-08-27 15:05:21,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:05:21,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428089281] [2023-08-27 15:05:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:05:21,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:05:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:21,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:05:21,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428089281] [2023-08-27 15:05:21,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428089281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:05:21,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459759654] [2023-08-27 15:05:21,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:05:21,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:21,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:05:22,001 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 15:05:22,004 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 15:05:22,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:05:22,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:05:22,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 15:05:22,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:05:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:22,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:05:23,056 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 15:05:23,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 209 [2023-08-27 15:05:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:23,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459759654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:05:23,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:05:23,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-27 15:05:23,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71622534] [2023-08-27 15:05:23,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:05:23,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:05:23,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:05:23,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:05:23,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2023-08-27 15:05:23,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 15:05:23,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 559 transitions, 8948 flow. Second operand has 31 states, 31 states have (on average 83.35483870967742) internal successors, (2584), 31 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states 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 15:05:23,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:05:23,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 15:05:23,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:05:28,036 INFO L124 PetriNetUnfolderBase]: 5486/10408 cut-off events. [2023-08-27 15:05:28,037 INFO L125 PetriNetUnfolderBase]: For 113152/113152 co-relation queries the response was YES. [2023-08-27 15:05:28,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52977 conditions, 10408 events. 5486/10408 cut-off events. For 113152/113152 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 82215 event pairs, 1375 based on Foata normal form. 60/10467 useless extension candidates. Maximal degree in co-relation 52883. Up to 5651 conditions per place. [2023-08-27 15:05:28,124 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 701 selfloop transitions, 273 changer transitions 20/994 dead transitions. [2023-08-27 15:05:28,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 994 transitions, 15441 flow [2023-08-27 15:05:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 15:05:28,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 15:05:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3144 transitions. [2023-08-27 15:05:28,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129915380786461 [2023-08-27 15:05:28,129 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3144 transitions. [2023-08-27 15:05:28,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3144 transitions. [2023-08-27 15:05:28,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:05:28,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3144 transitions. [2023-08-27 15:05:28,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 89.82857142857142) internal successors, (3144), 35 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states 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 15:05:28,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 287.0) internal successors, (10332), 36 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states 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 15:05:28,139 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 287.0) internal successors, (10332), 36 states have internal predecessors, (10332), 0 states have call successors, (0), 0 states 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 15:05:28,139 INFO L175 Difference]: Start difference. First operand has 287 places, 559 transitions, 8948 flow. Second operand 35 states and 3144 transitions. [2023-08-27 15:05:28,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 994 transitions, 15441 flow [2023-08-27 15:05:29,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 994 transitions, 15323 flow, removed 59 selfloop flow, removed 0 redundant places. [2023-08-27 15:05:29,057 INFO L231 Difference]: Finished difference. Result has 336 places, 713 transitions, 12415 flow [2023-08-27 15:05:29,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=8752, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12415, PETRI_PLACES=336, PETRI_TRANSITIONS=713} [2023-08-27 15:05:29,058 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2023-08-27 15:05:29,058 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 713 transitions, 12415 flow [2023-08-27 15:05:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 83.35483870967742) internal successors, (2584), 31 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states 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 15:05:29,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:05:29,058 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:05:29,064 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 15:05:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:29,259 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:05:29,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:05:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash -6486497, now seen corresponding path program 6 times [2023-08-27 15:05:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:05:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977404206] [2023-08-27 15:05:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:05:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:05:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:30,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:05:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977404206] [2023-08-27 15:05:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977404206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:05:30,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749619346] [2023-08-27 15:05:30,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:05:30,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:30,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:05:30,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:05:30,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 15:05:30,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:05:30,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:05:30,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 15:05:30,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:05:30,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:05:30,740 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 15:05:30,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2023-08-27 15:05:30,833 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 15:05:30,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-08-27 15:05:30,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:05:30,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2023-08-27 15:05:31,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:05:31,041 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2023-08-27 15:05:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:05:31,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:05:32,701 INFO L322 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2023-08-27 15:05:32,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 266 treesize of output 160 [2023-08-27 15:05:32,815 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:32,816 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 414 treesize of output 550 [2023-08-27 15:05:32,879 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:32,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 328 [2023-08-27 15:05:32,946 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:32,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 259 [2023-08-27 15:08:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:28,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749619346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:28,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:28,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 15:08:28,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039950766] [2023-08-27 15:08:28,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 15:08:28,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 15:08:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1188, Unknown=9, NotChecked=0, Total=1406 [2023-08-27 15:08:28,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:08:28,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 713 transitions, 12415 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 15:08:28,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:28,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:08:28,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:35,917 INFO L124 PetriNetUnfolderBase]: 5679/10712 cut-off events. [2023-08-27 15:08:35,918 INFO L125 PetriNetUnfolderBase]: For 141175/141175 co-relation queries the response was YES. [2023-08-27 15:08:35,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58422 conditions, 10712 events. 5679/10712 cut-off events. For 141175/141175 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 84701 event pairs, 1840 based on Foata normal form. 100/10810 useless extension candidates. Maximal degree in co-relation 58311. Up to 6865 conditions per place. [2023-08-27 15:08:36,021 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 755 selfloop transitions, 187 changer transitions 20/962 dead transitions. [2023-08-27 15:08:36,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 962 transitions, 16837 flow [2023-08-27 15:08:36,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 15:08:36,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 15:08:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2953 transitions. [2023-08-27 15:08:36,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28581107239643827 [2023-08-27 15:08:36,026 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2953 transitions. [2023-08-27 15:08:36,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2953 transitions. [2023-08-27 15:08:36,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:36,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2953 transitions. [2023-08-27 15:08:36,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 82.02777777777777) internal successors, (2953), 36 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states 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 15:08:36,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 287.0) internal successors, (10619), 37 states have internal predecessors, (10619), 0 states have call successors, (0), 0 states 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 15:08:36,060 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 287.0) internal successors, (10619), 37 states have internal predecessors, (10619), 0 states have call successors, (0), 0 states 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 15:08:36,060 INFO L175 Difference]: Start difference. First operand has 336 places, 713 transitions, 12415 flow. Second operand 36 states and 2953 transitions. [2023-08-27 15:08:36,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 962 transitions, 16837 flow [2023-08-27 15:08:37,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 962 transitions, 16455 flow, removed 153 selfloop flow, removed 15 redundant places. [2023-08-27 15:08:37,222 INFO L231 Difference]: Finished difference. Result has 367 places, 707 transitions, 13125 flow [2023-08-27 15:08:37,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=10545, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13125, PETRI_PLACES=367, PETRI_TRANSITIONS=707} [2023-08-27 15:08:37,223 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 337 predicate places. [2023-08-27 15:08:37,223 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 707 transitions, 13125 flow [2023-08-27 15:08:37,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 15:08:37,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:37,224 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:37,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 15:08:37,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:37,424 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:08:37,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash -7438817, now seen corresponding path program 7 times [2023-08-27 15:08:37,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:37,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063208776] [2023-08-27 15:08:37,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:37,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:38,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:38,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063208776] [2023-08-27 15:08:38,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063208776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:38,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049303852] [2023-08-27 15:08:38,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:08:38,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:38,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:38,361 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:08:38,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 15:08:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:38,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 15:08:38,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:08:38,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:39,219 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-27 15:08:39,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 250 treesize of output 242 [2023-08-27 15:08:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:08:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049303852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:39,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 28 [2023-08-27 15:08:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224874175] [2023-08-27 15:08:39,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 15:08:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 15:08:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-08-27 15:08:39,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:08:39,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 707 transitions, 13125 flow. Second operand has 30 states, 30 states have (on average 76.43333333333334) internal successors, (2293), 30 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:39,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:39,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:08:39,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:47,189 INFO L124 PetriNetUnfolderBase]: 7975/14978 cut-off events. [2023-08-27 15:08:47,189 INFO L125 PetriNetUnfolderBase]: For 247123/247123 co-relation queries the response was YES. [2023-08-27 15:08:47,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84954 conditions, 14978 events. 7975/14978 cut-off events. For 247123/247123 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 125834 event pairs, 1572 based on Foata normal form. 292/15269 useless extension candidates. Maximal degree in co-relation 84831. Up to 5553 conditions per place. [2023-08-27 15:08:47,462 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 844 selfloop transitions, 471 changer transitions 16/1331 dead transitions. [2023-08-27 15:08:47,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1331 transitions, 24319 flow [2023-08-27 15:08:47,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-27 15:08:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-27 15:08:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4236 transitions. [2023-08-27 15:08:47,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2894035663045706 [2023-08-27 15:08:47,466 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4236 transitions. [2023-08-27 15:08:47,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4236 transitions. [2023-08-27 15:08:47,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:47,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4236 transitions. [2023-08-27 15:08:47,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 83.05882352941177) internal successors, (4236), 51 states have internal predecessors, (4236), 0 states have call successors, (0), 0 states 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 15:08:47,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 287.0) internal successors, (14924), 52 states have internal predecessors, (14924), 0 states have call successors, (0), 0 states 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 15:08:47,477 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 287.0) internal successors, (14924), 52 states have internal predecessors, (14924), 0 states have call successors, (0), 0 states 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 15:08:47,477 INFO L175 Difference]: Start difference. First operand has 367 places, 707 transitions, 13125 flow. Second operand 51 states and 4236 transitions. [2023-08-27 15:08:47,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1331 transitions, 24319 flow [2023-08-27 15:08:49,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1331 transitions, 23915 flow, removed 144 selfloop flow, removed 22 redundant places. [2023-08-27 15:08:49,356 INFO L231 Difference]: Finished difference. Result has 422 places, 936 transitions, 19617 flow [2023-08-27 15:08:49,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=12393, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=19617, PETRI_PLACES=422, PETRI_TRANSITIONS=936} [2023-08-27 15:08:49,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 392 predicate places. [2023-08-27 15:08:49,357 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 936 transitions, 19617 flow [2023-08-27 15:08:49,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 76.43333333333334) internal successors, (2293), 30 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:49,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:49,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:49,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 15:08:49,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-27 15:08:49,558 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:08:49,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:49,559 INFO L85 PathProgramCache]: Analyzing trace with hash -6486498, now seen corresponding path program 7 times [2023-08-27 15:08:49,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:49,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378626864] [2023-08-27 15:08:49,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:49,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:50,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378626864] [2023-08-27 15:08:50,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378626864] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:50,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175335065] [2023-08-27 15:08:50,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:08:50,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:50,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:50,523 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:08:50,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 15:08:50,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:50,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 15:08:50,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:50,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:08:50,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:51,315 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-27 15:08:51,316 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 243 [2023-08-27 15:08:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:08:52,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175335065] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:52,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:52,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 28 [2023-08-27 15:08:52,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940756296] [2023-08-27 15:08:52,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:52,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 15:08:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 15:08:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2023-08-27 15:08:52,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 15:08:52,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 936 transitions, 19617 flow. Second operand has 30 states, 30 states have (on average 83.43333333333334) internal successors, (2503), 30 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states 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 15:08:52,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:52,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 15:08:52,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:59,259 INFO L124 PetriNetUnfolderBase]: 8135/15302 cut-off events. [2023-08-27 15:08:59,259 INFO L125 PetriNetUnfolderBase]: For 276015/276015 co-relation queries the response was YES. [2023-08-27 15:08:59,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92398 conditions, 15302 events. 8135/15302 cut-off events. For 276015/276015 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 129623 event pairs, 2684 based on Foata normal form. 84/15385 useless extension candidates. Maximal degree in co-relation 92250. Up to 10483 conditions per place. [2023-08-27 15:08:59,433 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 912 selfloop transitions, 218 changer transitions 20/1150 dead transitions. [2023-08-27 15:08:59,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1150 transitions, 23731 flow [2023-08-27 15:08:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 15:08:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 15:08:59,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2517 transitions. [2023-08-27 15:08:59,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31321553011448483 [2023-08-27 15:08:59,436 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2517 transitions. [2023-08-27 15:08:59,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2517 transitions. [2023-08-27 15:08:59,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:59,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2517 transitions. [2023-08-27 15:08:59,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 89.89285714285714) internal successors, (2517), 28 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states 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 15:08:59,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 287.0) internal successors, (8323), 29 states have internal predecessors, (8323), 0 states have call successors, (0), 0 states 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 15:08:59,442 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 287.0) internal successors, (8323), 29 states have internal predecessors, (8323), 0 states have call successors, (0), 0 states 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 15:08:59,442 INFO L175 Difference]: Start difference. First operand has 422 places, 936 transitions, 19617 flow. Second operand 28 states and 2517 transitions. [2023-08-27 15:08:59,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1150 transitions, 23731 flow [2023-08-27 15:09:02,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 1150 transitions, 22345 flow, removed 655 selfloop flow, removed 14 redundant places. [2023-08-27 15:09:02,378 INFO L231 Difference]: Finished difference. Result has 436 places, 934 transitions, 19090 flow [2023-08-27 15:09:02,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=17991, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=19090, PETRI_PLACES=436, PETRI_TRANSITIONS=934} [2023-08-27 15:09:02,379 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 406 predicate places. [2023-08-27 15:09:02,379 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 934 transitions, 19090 flow [2023-08-27 15:09:02,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.43333333333334) internal successors, (2503), 30 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states 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 15:09:02,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:02,380 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:02,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:02,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 15:09:02,581 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:09:02,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash -7409057, now seen corresponding path program 8 times [2023-08-27 15:09:02,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:02,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018570341] [2023-08-27 15:09:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:03,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018570341] [2023-08-27 15:09:03,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018570341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:03,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718936957] [2023-08-27 15:09:03,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:09:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:03,463 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:03,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 15:09:03,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:09:03,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:09:03,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 15:09:03,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:03,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:04,481 INFO L322 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2023-08-27 15:09:04,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 293 treesize of output 229 [2023-08-27 15:09:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:05,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718936957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:05,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:05,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2023-08-27 15:09:05,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024084094] [2023-08-27 15:09:05,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:05,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 15:09:05,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:05,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 15:09:05,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 15:09:05,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:09:05,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 934 transitions, 19090 flow. Second operand has 35 states, 35 states have (on average 76.28571428571429) internal successors, (2670), 35 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states 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 15:09:05,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:05,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:09:05,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:15,121 INFO L124 PetriNetUnfolderBase]: 10255/19242 cut-off events. [2023-08-27 15:09:15,121 INFO L125 PetriNetUnfolderBase]: For 364203/364203 co-relation queries the response was YES. [2023-08-27 15:09:15,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113741 conditions, 19242 events. 10255/19242 cut-off events. For 364203/364203 co-relation queries the response was YES. Maximal size of possible extension queue 1085. Compared 167324 event pairs, 2404 based on Foata normal form. 128/19369 useless extension candidates. Maximal degree in co-relation 113589. Up to 7689 conditions per place. [2023-08-27 15:09:15,414 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 1047 selfloop transitions, 506 changer transitions 20/1573 dead transitions. [2023-08-27 15:09:15,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1573 transitions, 31207 flow [2023-08-27 15:09:15,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 15:09:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 15:09:15,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3562 transitions. [2023-08-27 15:09:15,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2886313912973017 [2023-08-27 15:09:15,421 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3562 transitions. [2023-08-27 15:09:15,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3562 transitions. [2023-08-27 15:09:15,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:15,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3562 transitions. [2023-08-27 15:09:15,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 82.83720930232558) internal successors, (3562), 43 states have internal predecessors, (3562), 0 states have call successors, (0), 0 states 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 15:09:15,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 287.0) internal successors, (12628), 44 states have internal predecessors, (12628), 0 states have call successors, (0), 0 states 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 15:09:15,434 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 287.0) internal successors, (12628), 44 states have internal predecessors, (12628), 0 states have call successors, (0), 0 states 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 15:09:15,434 INFO L175 Difference]: Start difference. First operand has 436 places, 934 transitions, 19090 flow. Second operand 43 states and 3562 transitions. [2023-08-27 15:09:15,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1573 transitions, 31207 flow [2023-08-27 15:09:19,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1573 transitions, 30949 flow, removed 63 selfloop flow, removed 20 redundant places. [2023-08-27 15:09:19,274 INFO L231 Difference]: Finished difference. Result has 469 places, 1121 transitions, 24965 flow [2023-08-27 15:09:19,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=18552, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=24965, PETRI_PLACES=469, PETRI_TRANSITIONS=1121} [2023-08-27 15:09:19,275 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 439 predicate places. [2023-08-27 15:09:19,275 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1121 transitions, 24965 flow [2023-08-27 15:09:19,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.28571428571429) internal successors, (2670), 35 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states 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 15:09:19,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:19,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:19,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:19,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 15:09:19,476 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:09:19,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash -7409058, now seen corresponding path program 8 times [2023-08-27 15:09:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:19,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222943122] [2023-08-27 15:09:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:20,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222943122] [2023-08-27 15:09:20,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222943122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:20,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636244206] [2023-08-27 15:09:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:09:20,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:20,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:20,825 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:20,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 15:09:20,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:09:20,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:09:20,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 15:09:20,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:21,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:09:21,100 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 15:09:21,101 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-08-27 15:09:21,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:09:21,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-27 15:09:21,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:09:21,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-27 15:09:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:21,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:23,317 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-27 15:09:23,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 262 treesize of output 158 [2023-08-27 15:09:23,408 INFO L322 Elim1Store]: treesize reduction 74, result has 52.9 percent of original size [2023-08-27 15:09:23,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 468 treesize of output 483 [2023-08-27 15:09:23,462 INFO L322 Elim1Store]: treesize reduction 82, result has 20.4 percent of original size [2023-08-27 15:09:23,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 392 treesize of output 322 [2023-08-27 15:09:23,511 INFO L322 Elim1Store]: treesize reduction 82, result has 20.4 percent of original size [2023-08-27 15:09:23,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 246 treesize of output 221 [2023-08-27 15:09:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:31,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636244206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:31,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:31,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 15:09:31,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908742251] [2023-08-27 15:09:31,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:31,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 15:09:31,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:31,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 15:09:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1089, Unknown=3, NotChecked=0, Total=1406 [2023-08-27 15:09:31,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:09:31,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1121 transitions, 24965 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 15:09:31,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:31,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:09:31,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:44,323 INFO L124 PetriNetUnfolderBase]: 8153/15312 cut-off events. [2023-08-27 15:09:44,323 INFO L125 PetriNetUnfolderBase]: For 317048/317048 co-relation queries the response was YES. [2023-08-27 15:09:44,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95396 conditions, 15312 events. 8153/15312 cut-off events. For 317048/317048 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 125878 event pairs, 2670 based on Foata normal form. 50/15361 useless extension candidates. Maximal degree in co-relation 95232. Up to 12547 conditions per place. [2023-08-27 15:09:44,536 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 869 selfloop transitions, 260 changer transitions 20/1149 dead transitions. [2023-08-27 15:09:44,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1149 transitions, 24339 flow [2023-08-27 15:09:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 15:09:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 15:09:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3585 transitions. [2023-08-27 15:09:44,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2838929363319607 [2023-08-27 15:09:44,539 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3585 transitions. [2023-08-27 15:09:44,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3585 transitions. [2023-08-27 15:09:44,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:44,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3585 transitions. [2023-08-27 15:09:44,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 81.47727272727273) internal successors, (3585), 44 states have internal predecessors, (3585), 0 states have call successors, (0), 0 states 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 15:09:44,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 287.0) internal successors, (12915), 45 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states 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 15:09:44,551 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 287.0) internal successors, (12915), 45 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states 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 15:09:44,551 INFO L175 Difference]: Start difference. First operand has 469 places, 1121 transitions, 24965 flow. Second operand 44 states and 3585 transitions. [2023-08-27 15:09:44,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1149 transitions, 24339 flow [2023-08-27 15:09:47,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1149 transitions, 23413 flow, removed 383 selfloop flow, removed 24 redundant places. [2023-08-27 15:09:47,974 INFO L231 Difference]: Finished difference. Result has 492 places, 949 transitions, 20955 flow [2023-08-27 15:09:47,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=19632, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=665, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=20955, PETRI_PLACES=492, PETRI_TRANSITIONS=949} [2023-08-27 15:09:47,975 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 462 predicate places. [2023-08-27 15:09:47,975 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 949 transitions, 20955 flow [2023-08-27 15:09:47,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states 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 15:09:47,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:47,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:47,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:48,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:48,181 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:09:48,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1113053936, now seen corresponding path program 1 times [2023-08-27 15:09:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942951606] [2023-08-27 15:09:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:48,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:48,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942951606] [2023-08-27 15:09:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942951606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:48,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857725835] [2023-08-27 15:09:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:48,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:48,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:48,613 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:48,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 15:09:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:48,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 15:09:48,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:48,791 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:09:48,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:09:48,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:09:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:49,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:49,330 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_932 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_932) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse0 .cse1) 1)) (<= (+ c_~sum~0 (select .cse0 .cse2)) 1)))) (forall ((v_ArrVal_933 (Array Int Int)) (v_ArrVal_932 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_932) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_933) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse1) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse2)))))))) (< 2147483646 c_~back~0) (<= c_~n~0 c_~back~0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-27 15:09:49,346 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:49,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-27 15:09:49,353 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:49,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 292 [2023-08-27 15:09:49,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:49,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-08-27 15:09:49,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:49,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 79 [2023-08-27 15:09:49,503 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:49,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-27 15:09:49,513 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 15:09:49,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 288 [2023-08-27 15:09:49,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:09:49,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-27 15:09:49,530 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 15:09:49,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 75 [2023-08-27 15:09:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 15:09:49,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857725835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:49,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:49,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-27 15:09:49,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49431957] [2023-08-27 15:09:49,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:49,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:09:49,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:49,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:09:49,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=333, Unknown=2, NotChecked=38, Total=462 [2023-08-27 15:09:49,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:09:49,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 949 transitions, 20955 flow. Second operand has 22 states, 22 states have (on average 76.95454545454545) internal successors, (1693), 22 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 15:09:49,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:49,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:09:49,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:56,646 INFO L124 PetriNetUnfolderBase]: 8153/15282 cut-off events. [2023-08-27 15:09:56,646 INFO L125 PetriNetUnfolderBase]: For 323722/323722 co-relation queries the response was YES. [2023-08-27 15:09:56,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95616 conditions, 15282 events. 8153/15282 cut-off events. For 323722/323722 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 125383 event pairs, 3198 based on Foata normal form. 30/15311 useless extension candidates. Maximal degree in co-relation 95445. Up to 14139 conditions per place. [2023-08-27 15:09:56,858 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 911 selfloop transitions, 38 changer transitions 76/1025 dead transitions. [2023-08-27 15:09:56,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1025 transitions, 23175 flow [2023-08-27 15:09:56,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 15:09:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 15:09:56,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1701 transitions. [2023-08-27 15:09:56,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28222996515679444 [2023-08-27 15:09:56,860 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1701 transitions. [2023-08-27 15:09:56,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1701 transitions. [2023-08-27 15:09:56,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:56,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1701 transitions. [2023-08-27 15:09:56,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 81.0) internal successors, (1701), 21 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states 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 15:09:56,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states 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 15:09:56,866 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states 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 15:09:56,866 INFO L175 Difference]: Start difference. First operand has 492 places, 949 transitions, 20955 flow. Second operand 21 states and 1701 transitions. [2023-08-27 15:09:56,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1025 transitions, 23175 flow [2023-08-27 15:10:00,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 1025 transitions, 22945 flow, removed 45 selfloop flow, removed 30 redundant places. [2023-08-27 15:10:00,880 INFO L231 Difference]: Finished difference. Result has 480 places, 936 transitions, 20613 flow [2023-08-27 15:10:00,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=20656, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=945, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=20613, PETRI_PLACES=480, PETRI_TRANSITIONS=936} [2023-08-27 15:10:00,881 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 450 predicate places. [2023-08-27 15:10:00,881 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 936 transitions, 20613 flow [2023-08-27 15:10:00,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 76.95454545454545) internal successors, (1693), 22 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states 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 15:10:00,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:00,882 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:00,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:01,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 15:10:01,087 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:10:01,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:01,087 INFO L85 PathProgramCache]: Analyzing trace with hash -201080733, now seen corresponding path program 9 times [2023-08-27 15:10:01,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:01,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156211579] [2023-08-27 15:10:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:01,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:01,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156211579] [2023-08-27 15:10:01,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156211579] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:01,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713768346] [2023-08-27 15:10:01,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:10:01,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:01,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:01,275 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:01,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 15:10:01,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 15:10:01,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:01,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 15:10:01,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:01,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713768346] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:01,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:01,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 15:10:01,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148784489] [2023-08-27 15:10:01,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:01,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 15:10:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 15:10:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2023-08-27 15:10:01,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 287 [2023-08-27 15:10:01,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 936 transitions, 20613 flow. Second operand has 29 states, 29 states have (on average 99.44827586206897) internal successors, (2884), 29 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 15:10:01,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:01,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 287 [2023-08-27 15:10:01,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:04,206 INFO L124 PetriNetUnfolderBase]: 3152/6166 cut-off events. [2023-08-27 15:10:04,206 INFO L125 PetriNetUnfolderBase]: For 148574/148582 co-relation queries the response was YES. [2023-08-27 15:10:04,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38661 conditions, 6166 events. 3152/6166 cut-off events. For 148574/148582 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 47794 event pairs, 977 based on Foata normal form. 242/6379 useless extension candidates. Maximal degree in co-relation 38502. Up to 3768 conditions per place. [2023-08-27 15:10:04,298 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 286 selfloop transitions, 55 changer transitions 18/366 dead transitions. [2023-08-27 15:10:04,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 366 transitions, 8151 flow [2023-08-27 15:10:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 15:10:04,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 15:10:04,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1361 transitions. [2023-08-27 15:10:04,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36478155990351113 [2023-08-27 15:10:04,300 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1361 transitions. [2023-08-27 15:10:04,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1361 transitions. [2023-08-27 15:10:04,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:04,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1361 transitions. [2023-08-27 15:10:04,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 104.6923076923077) internal successors, (1361), 13 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states 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 15:10:04,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 287.0) internal successors, (4018), 14 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states 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 15:10:04,305 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 287.0) internal successors, (4018), 14 states have internal predecessors, (4018), 0 states have call successors, (0), 0 states 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 15:10:04,305 INFO L175 Difference]: Start difference. First operand has 480 places, 936 transitions, 20613 flow. Second operand 13 states and 1361 transitions. [2023-08-27 15:10:04,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 366 transitions, 8151 flow [2023-08-27 15:10:05,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 366 transitions, 7205 flow, removed 177 selfloop flow, removed 76 redundant places. [2023-08-27 15:10:05,009 INFO L231 Difference]: Finished difference. Result has 325 places, 315 transitions, 6392 flow [2023-08-27 15:10:05,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=6282, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6392, PETRI_PLACES=325, PETRI_TRANSITIONS=315} [2023-08-27 15:10:05,010 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 295 predicate places. [2023-08-27 15:10:05,010 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 315 transitions, 6392 flow [2023-08-27 15:10:05,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.44827586206897) internal successors, (2884), 29 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states 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 15:10:05,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:05,011 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:05,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:05,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 15:10:05,213 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:10:05,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1671801967, now seen corresponding path program 9 times [2023-08-27 15:10:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381946332] [2023-08-27 15:10:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:07,224 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 15:10:07,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:07,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381946332] [2023-08-27 15:10:07,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381946332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:07,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168794424] [2023-08-27 15:10:07,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:10:07,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:07,230 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:07,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 15:10:07,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 15:10:07,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:07,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 15:10:07,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:07,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:08,259 INFO L322 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-08-27 15:10:08,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 225 [2023-08-27 15:10:08,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:10:08,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168794424] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:08,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:08,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 29 [2023-08-27 15:10:08,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869161037] [2023-08-27 15:10:08,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:08,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:10:08,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:08,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:10:08,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2023-08-27 15:10:08,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 15:10:08,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 315 transitions, 6392 flow. Second operand has 31 states, 31 states have (on average 83.45161290322581) internal successors, (2587), 31 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states 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 15:10:08,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:08,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 15:10:08,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:14,093 INFO L124 PetriNetUnfolderBase]: 4524/8700 cut-off events. [2023-08-27 15:10:14,093 INFO L125 PetriNetUnfolderBase]: For 208524/208524 co-relation queries the response was YES. [2023-08-27 15:10:14,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52269 conditions, 8700 events. 4524/8700 cut-off events. For 208524/208524 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 69792 event pairs, 685 based on Foata normal form. 96/8795 useless extension candidates. Maximal degree in co-relation 52150. Up to 2957 conditions per place. [2023-08-27 15:10:14,186 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 362 selfloop transitions, 310 changer transitions 28/700 dead transitions. [2023-08-27 15:10:14,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 700 transitions, 13501 flow [2023-08-27 15:10:14,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 15:10:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 15:10:14,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3932 transitions. [2023-08-27 15:10:14,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3113715552739943 [2023-08-27 15:10:14,190 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3932 transitions. [2023-08-27 15:10:14,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3932 transitions. [2023-08-27 15:10:14,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:14,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3932 transitions. [2023-08-27 15:10:14,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 89.36363636363636) internal successors, (3932), 44 states have internal predecessors, (3932), 0 states have call successors, (0), 0 states 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 15:10:14,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 287.0) internal successors, (12915), 45 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states 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 15:10:14,198 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 287.0) internal successors, (12915), 45 states have internal predecessors, (12915), 0 states have call successors, (0), 0 states 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 15:10:14,198 INFO L175 Difference]: Start difference. First operand has 325 places, 315 transitions, 6392 flow. Second operand 44 states and 3932 transitions. [2023-08-27 15:10:14,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 700 transitions, 13501 flow [2023-08-27 15:10:14,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 700 transitions, 12779 flow, removed 302 selfloop flow, removed 11 redundant places. [2023-08-27 15:10:14,926 INFO L231 Difference]: Finished difference. Result has 370 places, 472 transitions, 11081 flow [2023-08-27 15:10:14,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=5953, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11081, PETRI_PLACES=370, PETRI_TRANSITIONS=472} [2023-08-27 15:10:14,927 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 340 predicate places. [2023-08-27 15:10:14,927 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 472 transitions, 11081 flow [2023-08-27 15:10:14,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 83.45161290322581) internal successors, (2587), 31 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states 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 15:10:14,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:14,928 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:14,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:15,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:15,128 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:10:15,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:15,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1671831726, now seen corresponding path program 10 times [2023-08-27 15:10:15,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:15,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293829102] [2023-08-27 15:10:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:15,876 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 15:10:15,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293829102] [2023-08-27 15:10:15,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293829102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:15,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294327630] [2023-08-27 15:10:15,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:10:15,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:15,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:15,878 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:15,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 15:10:15,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:10:15,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:15,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 15:10:15,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:16,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:16,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:16,732 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-27 15:10:16,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 243 [2023-08-27 15:10:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:10:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294327630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:17,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:17,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 29 [2023-08-27 15:10:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996949655] [2023-08-27 15:10:17,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:17,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:10:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:10:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-08-27 15:10:17,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 15:10:17,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 472 transitions, 11081 flow. Second operand has 31 states, 31 states have (on average 83.45161290322581) internal successors, (2587), 31 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states 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 15:10:17,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:17,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 15:10:17,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:21,850 INFO L124 PetriNetUnfolderBase]: 4734/9122 cut-off events. [2023-08-27 15:10:21,850 INFO L125 PetriNetUnfolderBase]: For 230002/230002 co-relation queries the response was YES. [2023-08-27 15:10:21,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55944 conditions, 9122 events. 4734/9122 cut-off events. For 230002/230002 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 73528 event pairs, 917 based on Foata normal form. 176/9297 useless extension candidates. Maximal degree in co-relation 55814. Up to 3645 conditions per place. [2023-08-27 15:10:21,964 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 399 selfloop transitions, 261 changer transitions 19/679 dead transitions. [2023-08-27 15:10:21,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 679 transitions, 14495 flow [2023-08-27 15:10:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 15:10:21,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 15:10:21,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2788 transitions. [2023-08-27 15:10:21,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31336405529953915 [2023-08-27 15:10:21,968 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2788 transitions. [2023-08-27 15:10:21,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2788 transitions. [2023-08-27 15:10:21,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:21,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2788 transitions. [2023-08-27 15:10:21,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.93548387096774) internal successors, (2788), 31 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states 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 15:10:21,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 287.0) internal successors, (9184), 32 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states 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 15:10:21,977 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 287.0) internal successors, (9184), 32 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states 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 15:10:21,977 INFO L175 Difference]: Start difference. First operand has 370 places, 472 transitions, 11081 flow. Second operand 31 states and 2788 transitions. [2023-08-27 15:10:21,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 679 transitions, 14495 flow [2023-08-27 15:10:23,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 679 transitions, 12515 flow, removed 844 selfloop flow, removed 19 redundant places. [2023-08-27 15:10:23,274 INFO L231 Difference]: Finished difference. Result has 387 places, 491 transitions, 10877 flow [2023-08-27 15:10:23,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=8936, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=10877, PETRI_PLACES=387, PETRI_TRANSITIONS=491} [2023-08-27 15:10:23,275 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2023-08-27 15:10:23,275 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 491 transitions, 10877 flow [2023-08-27 15:10:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 83.45161290322581) internal successors, (2587), 31 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states 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 15:10:23,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:23,276 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:23,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:23,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:23,482 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:10:23,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1202356179, now seen corresponding path program 11 times [2023-08-27 15:10:23,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081806535] [2023-08-27 15:10:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:10:23,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:23,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081806535] [2023-08-27 15:10:23,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081806535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:23,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102934492] [2023-08-27 15:10:23,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:10:23,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:23,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:23,614 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:23,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 15:10:23,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:10:23,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:23,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 15:10:23,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:23,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:23,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 140 [2023-08-27 15:10:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:10:24,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:24,311 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-27 15:10:24,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 171 [2023-08-27 15:10:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:10:24,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102934492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:24,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:24,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 18 [2023-08-27 15:10:24,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955301312] [2023-08-27 15:10:24,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:24,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:10:24,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:24,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:10:24,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:10:24,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 287 [2023-08-27 15:10:24,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 491 transitions, 10877 flow. Second operand has 20 states, 20 states have (on average 101.8) internal successors, (2036), 20 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states 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 15:10:24,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:24,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 287 [2023-08-27 15:10:24,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:27,451 INFO L124 PetriNetUnfolderBase]: 6352/12145 cut-off events. [2023-08-27 15:10:27,451 INFO L125 PetriNetUnfolderBase]: For 243779/243779 co-relation queries the response was YES. [2023-08-27 15:10:27,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71874 conditions, 12145 events. 6352/12145 cut-off events. For 243779/243779 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 101381 event pairs, 887 based on Foata normal form. 36/12180 useless extension candidates. Maximal degree in co-relation 71737. Up to 4348 conditions per place. [2023-08-27 15:10:27,614 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 347 selfloop transitions, 403 changer transitions 5/755 dead transitions. [2023-08-27 15:10:27,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 755 transitions, 18107 flow [2023-08-27 15:10:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 15:10:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 15:10:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1324 transitions. [2023-08-27 15:10:27,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38443670150987225 [2023-08-27 15:10:27,616 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1324 transitions. [2023-08-27 15:10:27,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1324 transitions. [2023-08-27 15:10:27,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:27,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1324 transitions. [2023-08-27 15:10:27,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.33333333333333) internal successors, (1324), 12 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states 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 15:10:27,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states 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 15:10:27,620 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states 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 15:10:27,620 INFO L175 Difference]: Start difference. First operand has 387 places, 491 transitions, 10877 flow. Second operand 12 states and 1324 transitions. [2023-08-27 15:10:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 755 transitions, 18107 flow [2023-08-27 15:10:29,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 755 transitions, 17560 flow, removed 214 selfloop flow, removed 13 redundant places. [2023-08-27 15:10:29,251 INFO L231 Difference]: Finished difference. Result has 391 places, 633 transitions, 14896 flow [2023-08-27 15:10:29,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=10541, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=14896, PETRI_PLACES=391, PETRI_TRANSITIONS=633} [2023-08-27 15:10:29,251 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2023-08-27 15:10:29,251 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 633 transitions, 14896 flow [2023-08-27 15:10:29,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.8) internal successors, (2036), 20 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states 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 15:10:29,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:29,252 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:29,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:29,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:29,453 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:10:29,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:29,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1087949428, now seen corresponding path program 10 times [2023-08-27 15:10:29,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:29,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812359080] [2023-08-27 15:10:29,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:29,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:31,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812359080] [2023-08-27 15:10:31,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812359080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:31,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141946787] [2023-08-27 15:10:31,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:10:31,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:31,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:31,748 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:31,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 15:10:31,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:10:31,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:31,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 15:10:31,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:10:32,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:32,326 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 15:10:32,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 224 treesize of output 186 [2023-08-27 15:10:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 15:10:32,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141946787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:32,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:32,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 5] total 28 [2023-08-27 15:10:32,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160071273] [2023-08-27 15:10:32,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:32,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 15:10:32,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:32,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 15:10:32,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-08-27 15:10:32,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:10:32,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 633 transitions, 14896 flow. Second operand has 30 states, 30 states have (on average 76.5) internal successors, (2295), 30 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 15:10:32,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:32,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:10:32,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:37,116 INFO L124 PetriNetUnfolderBase]: 6440/12295 cut-off events. [2023-08-27 15:10:37,116 INFO L125 PetriNetUnfolderBase]: For 249473/249473 co-relation queries the response was YES. [2023-08-27 15:10:37,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75668 conditions, 12295 events. 6440/12295 cut-off events. For 249473/249473 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 104301 event pairs, 2229 based on Foata normal form. 24/12318 useless extension candidates. Maximal degree in co-relation 75526. Up to 8471 conditions per place. [2023-08-27 15:10:37,262 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 562 selfloop transitions, 168 changer transitions 32/762 dead transitions. [2023-08-27 15:10:37,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 762 transitions, 17627 flow [2023-08-27 15:10:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 15:10:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 15:10:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1868 transitions. [2023-08-27 15:10:37,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2829874261475534 [2023-08-27 15:10:37,265 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1868 transitions. [2023-08-27 15:10:37,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1868 transitions. [2023-08-27 15:10:37,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:37,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1868 transitions. [2023-08-27 15:10:37,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 81.21739130434783) internal successors, (1868), 23 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states 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 15:10:37,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 287.0) internal successors, (6888), 24 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states 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 15:10:37,270 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 287.0) internal successors, (6888), 24 states have internal predecessors, (6888), 0 states have call successors, (0), 0 states 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 15:10:37,270 INFO L175 Difference]: Start difference. First operand has 391 places, 633 transitions, 14896 flow. Second operand 23 states and 1868 transitions. [2023-08-27 15:10:37,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 762 transitions, 17627 flow [2023-08-27 15:10:39,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 762 transitions, 17036 flow, removed 257 selfloop flow, removed 3 redundant places. [2023-08-27 15:10:39,116 INFO L231 Difference]: Finished difference. Result has 410 places, 636 transitions, 14861 flow [2023-08-27 15:10:39,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=14252, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14861, PETRI_PLACES=410, PETRI_TRANSITIONS=636} [2023-08-27 15:10:39,117 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2023-08-27 15:10:39,117 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 636 transitions, 14861 flow [2023-08-27 15:10:39,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 76.5) internal successors, (2295), 30 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states 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 15:10:39,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:39,117 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:39,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:39,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:39,318 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:10:39,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:39,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2026754479, now seen corresponding path program 11 times [2023-08-27 15:10:39,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:39,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574191327] [2023-08-27 15:10:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:39,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:40,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:40,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574191327] [2023-08-27 15:10:40,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574191327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:40,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281665105] [2023-08-27 15:10:40,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:10:40,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:40,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:40,775 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:40,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 15:10:40,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:10:40,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:40,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 15:10:40,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:40,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:10:40,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-08-27 15:10:41,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:10:41,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:10:41,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:10:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:41,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:43,100 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:43,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-08-27 15:10:43,234 INFO L322 Elim1Store]: treesize reduction 30, result has 80.4 percent of original size [2023-08-27 15:10:43,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1020 [2023-08-27 15:10:43,258 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:10:43,261 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:10:43,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:10:43,325 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:43,325 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 340 treesize of output 408 [2023-08-27 15:10:43,462 INFO L322 Elim1Store]: treesize reduction 30, result has 80.4 percent of original size [2023-08-27 15:10:43,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 353 [2023-08-27 15:10:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:59,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281665105] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:59,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:59,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-27 15:10:59,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918696179] [2023-08-27 15:10:59,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:59,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-27 15:10:59,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:59,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-27 15:10:59,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1864, Unknown=3, NotChecked=0, Total=2162 [2023-08-27 15:10:59,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:10:59,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 636 transitions, 14861 flow. Second operand has 47 states, 47 states have (on average 76.14893617021276) internal successors, (3579), 47 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states 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 15:10:59,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:59,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:10:59,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:11:21,660 INFO L124 PetriNetUnfolderBase]: 9756/18442 cut-off events. [2023-08-27 15:11:21,660 INFO L125 PetriNetUnfolderBase]: For 550872/550872 co-relation queries the response was YES. [2023-08-27 15:11:21,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120555 conditions, 18442 events. 9756/18442 cut-off events. For 550872/550872 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 163616 event pairs, 2394 based on Foata normal form. 216/18655 useless extension candidates. Maximal degree in co-relation 120413. Up to 9758 conditions per place. [2023-08-27 15:11:21,935 INFO L140 encePairwiseOnDemand]: 276/287 looper letters, 1012 selfloop transitions, 489 changer transitions 47/1548 dead transitions. [2023-08-27 15:11:21,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1548 transitions, 32977 flow [2023-08-27 15:11:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-08-27 15:11:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2023-08-27 15:11:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 8048 transitions. [2023-08-27 15:11:21,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2861409372111214 [2023-08-27 15:11:21,944 INFO L72 ComplementDD]: Start complementDD. Operand 98 states and 8048 transitions. [2023-08-27 15:11:21,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 8048 transitions. [2023-08-27 15:11:21,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:11:21,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 98 states and 8048 transitions. [2023-08-27 15:11:21,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 99 states, 98 states have (on average 82.12244897959184) internal successors, (8048), 98 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states 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 15:11:21,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 99 states, 99 states have (on average 287.0) internal successors, (28413), 99 states have internal predecessors, (28413), 0 states have call successors, (0), 0 states 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 15:11:21,968 INFO L81 ComplementDD]: Finished complementDD. Result has 99 states, 99 states have (on average 287.0) internal successors, (28413), 99 states have internal predecessors, (28413), 0 states have call successors, (0), 0 states 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 15:11:21,968 INFO L175 Difference]: Start difference. First operand has 410 places, 636 transitions, 14861 flow. Second operand 98 states and 8048 transitions. [2023-08-27 15:11:21,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1548 transitions, 32977 flow [2023-08-27 15:11:26,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1548 transitions, 32552 flow, removed 72 selfloop flow, removed 19 redundant places. [2023-08-27 15:11:26,032 INFO L231 Difference]: Finished difference. Result has 532 places, 1019 transitions, 27438 flow [2023-08-27 15:11:26,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=14551, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=27438, PETRI_PLACES=532, PETRI_TRANSITIONS=1019} [2023-08-27 15:11:26,033 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 502 predicate places. [2023-08-27 15:11:26,033 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 1019 transitions, 27438 flow [2023-08-27 15:11:26,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 76.14893617021276) internal successors, (3579), 47 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states 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 15:11:26,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:11:26,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:11:26,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 15:11:26,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-27 15:11:26,234 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:11:26,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:11:26,235 INFO L85 PathProgramCache]: Analyzing trace with hash 2027677039, now seen corresponding path program 12 times [2023-08-27 15:11:26,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:11:26,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469971945] [2023-08-27 15:11:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:11:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:11:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:11:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:11:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469971945] [2023-08-27 15:11:26,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469971945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:11:26,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836672310] [2023-08-27 15:11:26,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:11:26,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:11:26,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:11:26,855 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:11:26,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 15:11:27,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:11:27,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:11:27,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 15:11:27,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:11:27,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:11:27,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:11:27,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:11:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:27,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:11:28,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:11:28,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 273 treesize of output 177 [2023-08-27 15:11:29,028 INFO L322 Elim1Store]: treesize reduction 44, result has 71.2 percent of original size [2023-08-27 15:11:29,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1191 treesize of output 1141 [2023-08-27 15:11:29,061 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:11:29,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:11:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:11:29,067 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:11:29,068 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:11:29,069 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:11:29,113 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:11:29,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 368 treesize of output 407 [2023-08-27 15:11:29,221 INFO L322 Elim1Store]: treesize reduction 52, result has 66.0 percent of original size [2023-08-27 15:11:29,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 373 treesize of output 351 [2023-08-27 15:11:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:34,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836672310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:11:34,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:11:34,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 44 [2023-08-27 15:11:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524449388] [2023-08-27 15:11:34,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:11:34,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-08-27 15:11:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:11:34,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-08-27 15:11:34,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1742, Unknown=3, NotChecked=0, Total=2070 [2023-08-27 15:11:34,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:11:34,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 1019 transitions, 27438 flow. Second operand has 46 states, 46 states have (on average 76.17391304347827) internal successors, (3504), 46 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states 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 15:11:34,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:11:34,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:11:34,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:12:17,283 INFO L124 PetriNetUnfolderBase]: 23464/43034 cut-off events. [2023-08-27 15:12:17,283 INFO L125 PetriNetUnfolderBase]: For 3225957/3225957 co-relation queries the response was YES. [2023-08-27 15:12:18,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361685 conditions, 43034 events. 23464/43034 cut-off events. For 3225957/3225957 co-relation queries the response was YES. Maximal size of possible extension queue 1591. Compared 399505 event pairs, 3938 based on Foata normal form. 516/43548 useless extension candidates. Maximal degree in co-relation 361505. Up to 11654 conditions per place. [2023-08-27 15:12:18,478 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 2111 selfloop transitions, 1920 changer transitions 34/4065 dead transitions. [2023-08-27 15:12:18,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 4065 transitions, 107914 flow [2023-08-27 15:12:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2023-08-27 15:12:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2023-08-27 15:12:18,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 13488 transitions. [2023-08-27 15:12:18,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2937282229965157 [2023-08-27 15:12:18,491 INFO L72 ComplementDD]: Start complementDD. Operand 160 states and 13488 transitions. [2023-08-27 15:12:18,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 160 states and 13488 transitions. [2023-08-27 15:12:18,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:12:18,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 160 states and 13488 transitions. [2023-08-27 15:12:18,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 161 states, 160 states have (on average 84.3) internal successors, (13488), 160 states have internal predecessors, (13488), 0 states have call successors, (0), 0 states 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 15:12:18,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 161 states, 161 states have (on average 287.0) internal successors, (46207), 161 states have internal predecessors, (46207), 0 states have call successors, (0), 0 states 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 15:12:18,535 INFO L81 ComplementDD]: Finished complementDD. Result has 161 states, 161 states have (on average 287.0) internal successors, (46207), 161 states have internal predecessors, (46207), 0 states have call successors, (0), 0 states 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 15:12:18,536 INFO L175 Difference]: Start difference. First operand has 532 places, 1019 transitions, 27438 flow. Second operand 160 states and 13488 transitions. [2023-08-27 15:12:18,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 4065 transitions, 107914 flow [2023-08-27 15:12:43,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 4065 transitions, 99944 flow, removed 3950 selfloop flow, removed 15 redundant places. [2023-08-27 15:12:43,244 INFO L231 Difference]: Finished difference. Result has 771 places, 2824 transitions, 83130 flow [2023-08-27 15:12:43,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=24503, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=160, PETRI_FLOW=83130, PETRI_PLACES=771, PETRI_TRANSITIONS=2824} [2023-08-27 15:12:43,245 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 741 predicate places. [2023-08-27 15:12:43,245 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 2824 transitions, 83130 flow [2023-08-27 15:12:43,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 76.17391304347827) internal successors, (3504), 46 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states 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 15:12:43,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:12:43,246 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:12:43,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 15:12:43,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:43,451 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:12:43,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:12:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash 283973935, now seen corresponding path program 13 times [2023-08-27 15:12:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:12:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161222532] [2023-08-27 15:12:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:12:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:12:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:12:44,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:12:44,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161222532] [2023-08-27 15:12:44,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161222532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:12:44,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445069512] [2023-08-27 15:12:44,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:12:44,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:44,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:12:44,225 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:12:44,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 15:12:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:44,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 15:12:44,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:12:44,767 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:12:44,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:12:45,491 INFO L322 Elim1Store]: treesize reduction 101, result has 44.2 percent of original size [2023-08-27 15:12:45,491 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 311 treesize of output 253 [2023-08-27 15:12:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:12:46,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445069512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:12:46,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:12:46,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 8] total 34 [2023-08-27 15:12:46,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2863150] [2023-08-27 15:12:46,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:12:46,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 15:12:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:12:46,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 15:12:46,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 15:12:46,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 15:12:46,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 2824 transitions, 83130 flow. Second operand has 36 states, 36 states have (on average 83.41666666666667) internal successors, (3003), 36 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 15:12:46,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:12:46,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 15:12:46,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:14:00,723 INFO L124 PetriNetUnfolderBase]: 34566/63192 cut-off events. [2023-08-27 15:14:00,723 INFO L125 PetriNetUnfolderBase]: For 10256337/10256337 co-relation queries the response was YES. [2023-08-27 15:14:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622688 conditions, 63192 events. 34566/63192 cut-off events. For 10256337/10256337 co-relation queries the response was YES. Maximal size of possible extension queue 2936. Compared 627718 event pairs, 6787 based on Foata normal form. 428/63619 useless extension candidates. Maximal degree in co-relation 622416. Up to 24569 conditions per place. [2023-08-27 15:14:04,435 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 2973 selfloop transitions, 2243 changer transitions 32/5248 dead transitions. [2023-08-27 15:14:04,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 914 places, 5248 transitions, 151698 flow [2023-08-27 15:14:04,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2023-08-27 15:14:04,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2023-08-27 15:14:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 13183 transitions. [2023-08-27 15:14:04,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31461505417402513 [2023-08-27 15:14:04,447 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 13183 transitions. [2023-08-27 15:14:04,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 13183 transitions. [2023-08-27 15:14:04,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:14:04,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 13183 transitions. [2023-08-27 15:14:04,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 90.29452054794521) internal successors, (13183), 146 states have internal predecessors, (13183), 0 states have call successors, (0), 0 states 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 15:14:04,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 287.0) internal successors, (42189), 147 states have internal predecessors, (42189), 0 states have call successors, (0), 0 states 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 15:14:04,489 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 287.0) internal successors, (42189), 147 states have internal predecessors, (42189), 0 states have call successors, (0), 0 states 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 15:14:04,489 INFO L175 Difference]: Start difference. First operand has 771 places, 2824 transitions, 83130 flow. Second operand 146 states and 13183 transitions. [2023-08-27 15:14:04,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 914 places, 5248 transitions, 151698 flow [2023-08-27 15:15:49,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 889 places, 5248 transitions, 136386 flow, removed 7457 selfloop flow, removed 25 redundant places. [2023-08-27 15:15:50,058 INFO L231 Difference]: Finished difference. Result has 930 places, 4238 transitions, 121309 flow [2023-08-27 15:15:50,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=69849, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2793, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=998, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=121309, PETRI_PLACES=930, PETRI_TRANSITIONS=4238} [2023-08-27 15:15:50,061 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 900 predicate places. [2023-08-27 15:15:50,061 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 4238 transitions, 121309 flow [2023-08-27 15:15:50,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 83.41666666666667) internal successors, (3003), 36 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states 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 15:15:50,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:15:50,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:15:50,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 15:15:50,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:15:50,267 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 15:15:50,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:15:50,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2026724718, now seen corresponding path program 12 times [2023-08-27 15:15:50,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:15:50,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672521386] [2023-08-27 15:15:50,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:15:50,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:15:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:15:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:15:51,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:15:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672521386] [2023-08-27 15:15:51,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672521386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:15:51,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746283445] [2023-08-27 15:15:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:15:51,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:15:51,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:15:51,197 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:15:51,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 15:15:51,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:15:51,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:15:51,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 15:15:51,421 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:15:51,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:15:51,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:15:51,595 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:15:51,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:15:51,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 15:15:52,295 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:15:52,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:15:54,415 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:15:54,415 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 241 treesize of output 157 [2023-08-27 15:15:54,624 INFO L322 Elim1Store]: treesize reduction 108, result has 60.1 percent of original size [2023-08-27 15:15:54,625 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1035 treesize of output 1055 [2023-08-27 15:15:54,659 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,662 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,663 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,664 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,665 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,668 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:15:54,717 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:15:54,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 339 treesize of output 380 [2023-08-27 15:15:54,862 INFO L322 Elim1Store]: treesize reduction 108, result has 46.3 percent of original size [2023-08-27 15:15:54,862 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 335 treesize of output 325 [2023-08-27 15:16:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:16:50,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746283445] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:16:50,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:16:50,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 43 [2023-08-27 15:16:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013810087] [2023-08-27 15:16:50,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:16:50,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 15:16:50,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:16:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 15:16:50,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1556, Unknown=1, NotChecked=0, Total=1980 [2023-08-27 15:16:50,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 15:16:50,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 4238 transitions, 121309 flow. Second operand has 45 states, 45 states have (on average 76.2) internal successors, (3429), 45 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states 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 15:16:50,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:16:50,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 15:16:50,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:16:58,229 WARN L234 SmtUtils]: Spent 7.36s on a formula simplification. DAG size of input: 206 DAG size of output: 198 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-27 15:17:11,112 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:17:11,112 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:17:12,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 15:17:12,312 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-27 15:17:12,326 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 137 [2023-08-27 15:17:12,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 15:17:12,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-27 15:17:12,327 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:264) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:167) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:376) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicateForConjunction(PredicateUnifier.java:232) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.getOrConstructPredicate(DeterministicInterpolantAutomaton.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.constructSuccessorsAndTransitions(DeterministicInterpolantAutomaton.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.NestedWordAutomataUtils.getSuccessorState(NestedWordAutomataUtils.java:482) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getOrConstructTransition(DifferencePetriNet.java:279) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePetriNet$DifferenceSuccessorTransitionProvider.getTransitions(DifferencePetriNet.java:261) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.addFullyInstantiatedCandidate(PossibleExtensions.java:168) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:195) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.evolveCandidate(PossibleExtensions.java:210) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PossibleExtensions.update(PossibleExtensions.java:135) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfoldingHelper(PetriNetUnfolderBase.java:226) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.computeUnfolding(PetriNetUnfolderBase.java:183) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolderBase.(PetriNetUnfolderBase.java:123) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.PetriNetUnfolder.(PetriNetUnfolder.java:72) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:76) at de.uni_freiburg.informatik.ultimate.automata.petrinet.unfolding.FinitePrefix.(FinitePrefix.java:64) at de.uni_freiburg.informatik.ultimate.automata.petrinet.operations.DifferencePairwiseOnDemand.(DifferencePairwiseOnDemand.java:128) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.enhanceAnddeterminizeInterpolantAutomaton(CegarLoopForPetriNet.java:481) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.concurrency.CegarLoopForPetriNet.refineAbstraction(CegarLoopForPetriNet.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-27 15:17:12,330 INFO L158 Benchmark]: Toolchain (without parser) took 782302.20ms. Allocated memory was 364.9MB in the beginning and 11.8GB in the end (delta: 11.5GB). Free memory was 340.4MB in the beginning and 6.9GB in the end (delta: -6.5GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-08-27 15:17:12,330 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 364.9MB. Free memory is still 341.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:17:12,330 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.97ms. Allocated memory is still 364.9MB. Free memory was 340.4MB in the beginning and 329.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 15:17:12,330 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.61ms. Allocated memory is still 364.9MB. Free memory was 329.0MB in the beginning and 327.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:17:12,331 INFO L158 Benchmark]: Boogie Preprocessor took 42.50ms. Allocated memory is still 364.9MB. Free memory was 327.0MB in the beginning and 325.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:17:12,331 INFO L158 Benchmark]: RCFGBuilder took 475.73ms. Allocated memory is still 364.9MB. Free memory was 325.7MB in the beginning and 297.2MB in the end (delta: 28.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-27 15:17:12,331 INFO L158 Benchmark]: TraceAbstraction took 781457.56ms. Allocated memory was 364.9MB in the beginning and 11.8GB in the end (delta: 11.5GB). Free memory was 296.3MB in the beginning and 6.9GB in the end (delta: -6.6GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-08-27 15:17:12,332 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 364.9MB. Free memory is still 341.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 267.97ms. Allocated memory is still 364.9MB. Free memory was 340.4MB in the beginning and 329.0MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 49.61ms. Allocated memory is still 364.9MB. Free memory was 329.0MB in the beginning and 327.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.50ms. Allocated memory is still 364.9MB. Free memory was 327.0MB in the beginning and 325.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 475.73ms. Allocated memory is still 364.9MB. Free memory was 325.7MB in the beginning and 297.2MB in the end (delta: 28.5MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 781457.56ms. Allocated memory was 364.9MB in the beginning and 11.8GB in the end (delta: 11.5GB). Free memory was 296.3MB in the beginning and 6.9GB in the end (delta: -6.6GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 126 PlacesBefore, 30 PlacesAfterwards, 130 TransitionsBefore, 26 TransitionsAfterwards, 1184 CoEnabledTransitionPairs, 7 FixpointIterations, 76 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 10 ConcurrentYvCompositions, 8 ChoiceCompositions, 146 TotalNumberOfCompositions, 1476 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1429, independent: 1420, independent conditional: 0, independent unconditional: 1420, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 654, independent: 650, independent conditional: 0, independent unconditional: 650, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1429, independent: 770, independent conditional: 0, independent unconditional: 770, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 654, unknown conditional: 0, unknown unconditional: 654] , Statistics on independence cache: Total cache size (in pairs): 41, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown