/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-more-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:37:49,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:37:49,405 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 14:37:49,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:37:49,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:37:49,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:37:49,436 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:37:49,436 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:37:49,437 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:37:49,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:37:49,440 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:37:49,441 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:37:49,441 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:37:49,442 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:37:49,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:37:49,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:37:49,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:37:49,443 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:37:49,443 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:37:49,443 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:37:49,443 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:37:49,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:37:49,444 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:37:49,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:37:49,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:37:49,444 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:37:49,445 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:37:49,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:37:49,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:37:49,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:37:49,446 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:37:49,446 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:37:49,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:37:49,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:37:49,447 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:37:49,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:37:49,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:37:49,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:37:49,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:37:49,780 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:37:49,781 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:37:49,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-27 14:37:51,015 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:37:51,228 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:37:51,228 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-08-27 14:37:51,235 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1818a6dca/6adec15d8c22455dadc7f6b00417a3cb/FLAG13ea598a3 [2023-08-27 14:37:51,250 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1818a6dca/6adec15d8c22455dadc7f6b00417a3cb [2023-08-27 14:37:51,252 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:37:51,253 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:37:51,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:37:51,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:37:51,257 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:37:51,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,258 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490fd531 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51, skipping insertion in model container [2023-08-27 14:37:51,258 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,289 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:37:51,461 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:37:51,473 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:37:51,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:37:51,526 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:37:51,526 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 14:37:51,532 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:37:51,532 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51 WrapperNode [2023-08-27 14:37:51,533 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:37:51,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:37:51,534 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:37:51,534 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:37:51,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,559 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,600 INFO L138 Inliner]: procedures = 26, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 290 [2023-08-27 14:37:51,601 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:37:51,602 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:37:51,602 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:37:51,602 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:37:51,613 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,626 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,632 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,636 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,650 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,651 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,654 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:37:51,655 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:37:51,655 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:37:51,655 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:37:51,656 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (1/1) ... [2023-08-27 14:37:51,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:37:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:51,693 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 14:37:51,717 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 14:37:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:37:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:37:51,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:37:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:37:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:37:51,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:37:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:37:51,736 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:37:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:37:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:37:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:37:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 14:37:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 14:37:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 14:37:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:37:51,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:37:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:37:51,739 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 14:37:51,856 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:37:51,858 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:37:52,209 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:37:52,345 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:37:52,345 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-27 14:37:52,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:37:52 BoogieIcfgContainer [2023-08-27 14:37:52,348 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:37:52,349 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:37:52,349 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:37:52,352 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:37:52,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:37:51" (1/3) ... [2023-08-27 14:37:52,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122259f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:37:52, skipping insertion in model container [2023-08-27 14:37:52,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:51" (2/3) ... [2023-08-27 14:37:52,353 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122259f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:37:52, skipping insertion in model container [2023-08-27 14:37:52,353 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:37:52" (3/3) ... [2023-08-27 14:37:52,354 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-08-27 14:37:52,369 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:37:52,369 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-08-27 14:37:52,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:37:52,463 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 14:37:52,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 240 places, 248 transitions, 520 flow [2023-08-27 14:37:52,624 INFO L124 PetriNetUnfolderBase]: 18/245 cut-off events. [2023-08-27 14:37:52,624 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:37:52,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 245 events. 18/245 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 200. Up to 3 conditions per place. [2023-08-27 14:37:52,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 240 places, 248 transitions, 520 flow [2023-08-27 14:37:52,656 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 234 transitions, 486 flow [2023-08-27 14:37:52,660 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:37:52,673 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 234 transitions, 486 flow [2023-08-27 14:37:52,676 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 234 transitions, 486 flow [2023-08-27 14:37:52,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 234 transitions, 486 flow [2023-08-27 14:37:52,730 INFO L124 PetriNetUnfolderBase]: 18/234 cut-off events. [2023-08-27 14:37:52,730 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:37:52,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 234 events. 18/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 242 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 200. Up to 3 conditions per place. [2023-08-27 14:37:52,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 3960 [2023-08-27 14:38:00,898 INFO L134 LiptonReduction]: Checked pairs total: 7261 [2023-08-27 14:38:00,898 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-27 14:38:00,909 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:38:00,914 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;@a54dad5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:38:00,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-27 14:38:00,917 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:38:00,917 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 14:38:00,917 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:38:00,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:00,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 14:38:00,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:00,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash 36335, now seen corresponding path program 1 times [2023-08-27 14:38:00,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320785675] [2023-08-27 14:38:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:00,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:01,142 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 14:38:01,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:01,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320785675] [2023-08-27 14:38:01,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320785675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:01,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:01,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:38:01,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247234613] [2023-08-27 14:38:01,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:01,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:01,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:01,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 14:38:01,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:01,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:01,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 14:38:01,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:01,667 INFO L124 PetriNetUnfolderBase]: 2691/3608 cut-off events. [2023-08-27 14:38:01,667 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-27 14:38:01,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7403 conditions, 3608 events. 2691/3608 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16198 event pairs, 1768 based on Foata normal form. 0/1395 useless extension candidates. Maximal degree in co-relation 6685. Up to 3605 conditions per place. [2023-08-27 14:38:01,697 INFO L140 encePairwiseOnDemand]: 488/503 looper letters, 40 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-27 14:38:01,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 200 flow [2023-08-27 14:38:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-27 14:38:01,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280980781974818 [2023-08-27 14:38:01,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-27 14:38:01,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-27 14:38:01,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:01,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-27 14:38:01,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:01,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:01,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:01,766 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 114 flow. Second operand 3 states and 646 transitions. [2023-08-27 14:38:01,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 200 flow [2023-08-27 14:38:01,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 188 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 14:38:01,772 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 134 flow [2023-08-27 14:38:01,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-27 14:38:01,776 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2023-08-27 14:38:01,777 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 134 flow [2023-08-27 14:38:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:01,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:01,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:38:01,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:38:01,778 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:01,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:01,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1128527, now seen corresponding path program 1 times [2023-08-27 14:38:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:01,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506309113] [2023-08-27 14:38:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:01,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:01,899 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 14:38:01,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:01,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506309113] [2023-08-27 14:38:01,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506309113] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:01,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907899603] [2023-08-27 14:38:01,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:01,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:01,905 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 14:38:01,950 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 14:38:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:02,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:02,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:02,063 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:02,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907899603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:02,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:02,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 14:38:02,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159906264] [2023-08-27 14:38:02,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:02,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:02,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:02,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:38:02,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 14:38:02,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:02,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:02,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 14:38:02,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:02,553 INFO L124 PetriNetUnfolderBase]: 2691/3606 cut-off events. [2023-08-27 14:38:02,553 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-27 14:38:02,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7295 conditions, 3606 events. 2691/3606 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16225 event pairs, 1768 based on Foata normal form. 0/1397 useless extension candidates. Maximal degree in co-relation 7253. Up to 3597 conditions per place. [2023-08-27 14:38:02,574 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 37 selfloop transitions, 6 changer transitions 0/44 dead transitions. [2023-08-27 14:38:02,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 212 flow [2023-08-27 14:38:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:38:02,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:38:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 833 transitions. [2023-08-27 14:38:02,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4140159045725646 [2023-08-27 14:38:02,579 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 833 transitions. [2023-08-27 14:38:02,579 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 833 transitions. [2023-08-27 14:38:02,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:02,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 833 transitions. [2023-08-27 14:38:02,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 208.25) internal successors, (833), 4 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:02,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:02,587 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:02,587 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 134 flow. Second operand 4 states and 833 transitions. [2023-08-27 14:38:02,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 212 flow [2023-08-27 14:38:02,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:02,589 INFO L231 Difference]: Finished difference. Result has 44 places, 44 transitions, 128 flow [2023-08-27 14:38:02,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=128, PETRI_PLACES=44, PETRI_TRANSITIONS=44} [2023-08-27 14:38:02,590 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -8 predicate places. [2023-08-27 14:38:02,590 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 44 transitions, 128 flow [2023-08-27 14:38:02,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:02,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:02,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:38:02,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 14:38:02,796 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 14:38:02,797 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:02,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:02,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1128540, now seen corresponding path program 1 times [2023-08-27 14:38:02,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:02,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652128473] [2023-08-27 14:38:02,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:02,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:02,900 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 14:38:02,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652128473] [2023-08-27 14:38:02,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652128473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:02,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289456940] [2023-08-27 14:38:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:02,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:02,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:02,904 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 14:38:02,906 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 14:38:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:03,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:03,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:03,017 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 14:38:03,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:03,034 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 14:38:03,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289456940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:03,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:03,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:38:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096058003] [2023-08-27 14:38:03,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:03,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:38:03,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:03,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:38:03,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:38:03,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 14:38:03,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 44 transitions, 128 flow. Second operand has 7 states, 7 states have (on average 198.14285714285714) internal successors, (1387), 7 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:03,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:03,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 14:38:03,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:03,456 INFO L124 PetriNetUnfolderBase]: 2697/3618 cut-off events. [2023-08-27 14:38:03,456 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-27 14:38:03,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7338 conditions, 3618 events. 2697/3618 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16322 event pairs, 1768 based on Foata normal form. 0/1410 useless extension candidates. Maximal degree in co-relation 7253. Up to 3606 conditions per place. [2023-08-27 14:38:03,472 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 38 selfloop transitions, 17 changer transitions 0/56 dead transitions. [2023-08-27 14:38:03,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 298 flow [2023-08-27 14:38:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:38:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:38:03,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1243 transitions. [2023-08-27 14:38:03,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118621603711067 [2023-08-27 14:38:03,476 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1243 transitions. [2023-08-27 14:38:03,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1243 transitions. [2023-08-27 14:38:03,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:03,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1243 transitions. [2023-08-27 14:38:03,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.16666666666666) internal successors, (1243), 6 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:03,483 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:03,485 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:03,485 INFO L175 Difference]: Start difference. First operand has 44 places, 44 transitions, 128 flow. Second operand 6 states and 1243 transitions. [2023-08-27 14:38:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 298 flow [2023-08-27 14:38:03,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 56 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:03,487 INFO L231 Difference]: Finished difference. Result has 50 places, 56 transitions, 244 flow [2023-08-27 14:38:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=244, PETRI_PLACES=50, PETRI_TRANSITIONS=56} [2023-08-27 14:38:03,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 14:38:03,488 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 56 transitions, 244 flow [2023-08-27 14:38:03,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 198.14285714285714) internal successors, (1387), 7 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:03,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:03,489 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 14:38:03,499 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 14:38:03,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 14:38:03,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:03,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -737663492, now seen corresponding path program 2 times [2023-08-27 14:38:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:03,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637303201] [2023-08-27 14:38:03,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:03,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:03,781 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 14:38:03,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:03,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637303201] [2023-08-27 14:38:03,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637303201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:03,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749140607] [2023-08-27 14:38:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:03,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:03,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:03,783 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 14:38:03,785 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 14:38:03,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:03,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:03,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:38:03,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:03,874 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 14:38:03,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:03,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749140607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:03,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:03,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 14:38:03,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64888481] [2023-08-27 14:38:03,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:03,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:03,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:38:03,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 503 [2023-08-27 14:38:03,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 56 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:03,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:03,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 503 [2023-08-27 14:38:03,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:04,237 INFO L124 PetriNetUnfolderBase]: 2697/3617 cut-off events. [2023-08-27 14:38:04,237 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-27 14:38:04,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7363 conditions, 3617 events. 2697/3617 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 16307 event pairs, 1768 based on Foata normal form. 1/1413 useless extension candidates. Maximal degree in co-relation 7304. Up to 3611 conditions per place. [2023-08-27 14:38:04,255 INFO L140 encePairwiseOnDemand]: 500/503 looper letters, 48 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2023-08-27 14:38:04,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 342 flow [2023-08-27 14:38:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 636 transitions. [2023-08-27 14:38:04,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42147117296222664 [2023-08-27 14:38:04,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 636 transitions. [2023-08-27 14:38:04,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 636 transitions. [2023-08-27 14:38:04,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:04,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 636 transitions. [2023-08-27 14:38:04,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,272 INFO L175 Difference]: Start difference. First operand has 50 places, 56 transitions, 244 flow. Second operand 3 states and 636 transitions. [2023-08-27 14:38:04,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 342 flow [2023-08-27 14:38:04,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 316 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:04,277 INFO L231 Difference]: Finished difference. Result has 50 places, 55 transitions, 220 flow [2023-08-27 14:38:04,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=55} [2023-08-27 14:38:04,279 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 14:38:04,279 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 55 transitions, 220 flow [2023-08-27 14:38:04,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.0) internal successors, (600), 3 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:04,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 14:38:04,291 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 14:38:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:04,485 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:04,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:04,486 INFO L85 PathProgramCache]: Analyzing trace with hash -721938586, now seen corresponding path program 1 times [2023-08-27 14:38:04,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:04,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75263347] [2023-08-27 14:38:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:04,524 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 14:38:04,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:04,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75263347] [2023-08-27 14:38:04,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75263347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:04,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:04,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:04,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945632574] [2023-08-27 14:38:04,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:04,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:04,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:04,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:04,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:04,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 503 [2023-08-27 14:38:04,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 55 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:04,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 503 [2023-08-27 14:38:04,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:04,927 INFO L124 PetriNetUnfolderBase]: 2909/4057 cut-off events. [2023-08-27 14:38:04,927 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-27 14:38:04,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8255 conditions, 4057 events. 2909/4057 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18362 event pairs, 1769 based on Foata normal form. 0/1807 useless extension candidates. Maximal degree in co-relation 8200. Up to 3282 conditions per place. [2023-08-27 14:38:04,939 INFO L140 encePairwiseOnDemand]: 497/503 looper letters, 74 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-27 14:38:04,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 424 flow [2023-08-27 14:38:04,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 685 transitions. [2023-08-27 14:38:04,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45394300861497683 [2023-08-27 14:38:04,942 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 685 transitions. [2023-08-27 14:38:04,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 685 transitions. [2023-08-27 14:38:04,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:04,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 685 transitions. [2023-08-27 14:38:04,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,947 INFO L175 Difference]: Start difference. First operand has 50 places, 55 transitions, 220 flow. Second operand 3 states and 685 transitions. [2023-08-27 14:38:04,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 424 flow [2023-08-27 14:38:04,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 412 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:04,949 INFO L231 Difference]: Finished difference. Result has 51 places, 58 transitions, 236 flow [2023-08-27 14:38:04,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=51, PETRI_TRANSITIONS=58} [2023-08-27 14:38:04,950 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-27 14:38:04,950 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 58 transitions, 236 flow [2023-08-27 14:38:04,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:04,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:04,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 14:38:04,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 14:38:04,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:04,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:04,952 INFO L85 PathProgramCache]: Analyzing trace with hash -721938755, now seen corresponding path program 1 times [2023-08-27 14:38:04,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:04,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064943168] [2023-08-27 14:38:04,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:04,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:05,036 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 14:38:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064943168] [2023-08-27 14:38:05,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064943168] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:05,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:05,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:05,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401689896] [2023-08-27 14:38:05,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:05,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:05,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:05,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:05,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:38:05,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 503 [2023-08-27 14:38:05,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 58 transitions, 236 flow. Second operand has 4 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:05,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 503 [2023-08-27 14:38:05,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:05,378 INFO L124 PetriNetUnfolderBase]: 2666/3739 cut-off events. [2023-08-27 14:38:05,378 INFO L125 PetriNetUnfolderBase]: For 312/454 co-relation queries the response was YES. [2023-08-27 14:38:05,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8888 conditions, 3739 events. 2666/3739 cut-off events. For 312/454 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17551 event pairs, 2036 based on Foata normal form. 216/2051 useless extension candidates. Maximal degree in co-relation 8808. Up to 3668 conditions per place. [2023-08-27 14:38:05,396 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 77 selfloop transitions, 3 changer transitions 1/82 dead transitions. [2023-08-27 14:38:05,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 497 flow [2023-08-27 14:38:05,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:38:05,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:38:05,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-08-27 14:38:05,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40059642147117297 [2023-08-27 14:38:05,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-08-27 14:38:05,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-08-27 14:38:05,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:05,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-08-27 14:38:05,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 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 14:38:05,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,436 INFO L175 Difference]: Start difference. First operand has 51 places, 58 transitions, 236 flow. Second operand 4 states and 806 transitions. [2023-08-27 14:38:05,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 497 flow [2023-08-27 14:38:05,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 82 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:05,439 INFO L231 Difference]: Finished difference. Result has 54 places, 58 transitions, 251 flow [2023-08-27 14:38:05,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=251, PETRI_PLACES=54, PETRI_TRANSITIONS=58} [2023-08-27 14:38:05,440 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-27 14:38:05,440 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 58 transitions, 251 flow [2023-08-27 14:38:05,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 187.25) internal successors, (749), 4 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:05,441 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 14:38:05,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 14:38:05,441 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:05,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:05,441 INFO L85 PathProgramCache]: Analyzing trace with hash -917486090, now seen corresponding path program 1 times [2023-08-27 14:38:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:05,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463619737] [2023-08-27 14:38:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:05,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:05,520 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 14:38:05,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:05,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463619737] [2023-08-27 14:38:05,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463619737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:05,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999865517] [2023-08-27 14:38:05,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:05,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:05,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:05,522 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 14:38:05,544 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 14:38:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:05,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 14:38:05,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:05,644 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 14:38:05,644 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:05,695 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 14:38:05,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999865517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:05,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:05,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 14:38:05,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052686616] [2023-08-27 14:38:05,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:05,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:38:05,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:05,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:38:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:38:05,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 503 [2023-08-27 14:38:05,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 58 transitions, 251 flow. Second operand has 13 states, 13 states have (on average 198.15384615384616) internal successors, (2576), 13 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:05,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 503 [2023-08-27 14:38:05,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:06,176 INFO L124 PetriNetUnfolderBase]: 2684/3775 cut-off events. [2023-08-27 14:38:06,177 INFO L125 PetriNetUnfolderBase]: For 857/997 co-relation queries the response was YES. [2023-08-27 14:38:06,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9506 conditions, 3775 events. 2684/3775 cut-off events. For 857/997 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 17866 event pairs, 2036 based on Foata normal form. 152/2021 useless extension candidates. Maximal degree in co-relation 9287. Up to 3735 conditions per place. [2023-08-27 14:38:06,197 INFO L140 encePairwiseOnDemand]: 497/503 looper letters, 40 selfloop transitions, 41 changer transitions 0/82 dead transitions. [2023-08-27 14:38:06,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 563 flow [2023-08-27 14:38:06,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:38:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:38:06,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2448 transitions. [2023-08-27 14:38:06,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40556660039761433 [2023-08-27 14:38:06,205 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2448 transitions. [2023-08-27 14:38:06,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2448 transitions. [2023-08-27 14:38:06,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:06,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2448 transitions. [2023-08-27 14:38:06,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 204.0) internal successors, (2448), 12 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 14:38:06,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 503.0) internal successors, (6539), 13 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,221 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 503.0) internal successors, (6539), 13 states have internal predecessors, (6539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,221 INFO L175 Difference]: Start difference. First operand has 54 places, 58 transitions, 251 flow. Second operand 12 states and 2448 transitions. [2023-08-27 14:38:06,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 563 flow [2023-08-27 14:38:06,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 557 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:06,224 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 531 flow [2023-08-27 14:38:06,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=531, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2023-08-27 14:38:06,225 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 18 predicate places. [2023-08-27 14:38:06,225 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 531 flow [2023-08-27 14:38:06,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.15384615384616) internal successors, (2576), 13 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:06,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:06,235 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 14:38:06,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:06,434 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:06,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1377005283, now seen corresponding path program 1 times [2023-08-27 14:38:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:06,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188454053] [2023-08-27 14:38:06,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:06,522 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 14:38:06,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:06,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188454053] [2023-08-27 14:38:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188454053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:06,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81528742] [2023-08-27 14:38:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:06,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:06,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:06,524 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 14:38:06,547 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 14:38:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:06,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:06,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:06,630 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 14:38:06,631 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:06,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81528742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:06,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:06,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 14:38:06,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042465348] [2023-08-27 14:38:06,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:06,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:06,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:38:06,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 503 [2023-08-27 14:38:06,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 531 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:06,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 503 [2023-08-27 14:38:06,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:06,895 INFO L124 PetriNetUnfolderBase]: 1540/2207 cut-off events. [2023-08-27 14:38:06,895 INFO L125 PetriNetUnfolderBase]: For 755/881 co-relation queries the response was YES. [2023-08-27 14:38:06,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5607 conditions, 2207 events. 1540/2207 cut-off events. For 755/881 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 9351 event pairs, 1136 based on Foata normal form. 325/1443 useless extension candidates. Maximal degree in co-relation 5485. Up to 2205 conditions per place. [2023-08-27 14:38:06,906 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 76 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2023-08-27 14:38:06,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 78 transitions, 667 flow [2023-08-27 14:38:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:06,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:06,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-27 14:38:06,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44267726971504306 [2023-08-27 14:38:06,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-27 14:38:06,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-27 14:38:06,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:06,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-27 14:38:06,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,914 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,914 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 531 flow. Second operand 3 states and 668 transitions. [2023-08-27 14:38:06,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 78 transitions, 667 flow [2023-08-27 14:38:06,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 541 flow, removed 40 selfloop flow, removed 5 redundant places. [2023-08-27 14:38:06,918 INFO L231 Difference]: Finished difference. Result has 64 places, 78 transitions, 389 flow [2023-08-27 14:38:06,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=64, PETRI_TRANSITIONS=78} [2023-08-27 14:38:06,919 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2023-08-27 14:38:06,919 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 78 transitions, 389 flow [2023-08-27 14:38:06,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:06,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:06,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 14:38:07,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:07,125 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:07,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:07,126 INFO L85 PathProgramCache]: Analyzing trace with hash 262516365, now seen corresponding path program 1 times [2023-08-27 14:38:07,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:07,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953795593] [2023-08-27 14:38:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:07,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:07,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:07,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953795593] [2023-08-27 14:38:07,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953795593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806390365] [2023-08-27 14:38:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:07,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:07,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:07,174 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 14:38:07,177 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 14:38:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:07,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:38:07,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:07,313 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 14:38:07,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:07,366 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 14:38:07,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806390365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:07,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:07,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-08-27 14:38:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728526786] [2023-08-27 14:38:07,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:38:07,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:38:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 14:38:07,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 503 [2023-08-27 14:38:07,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 78 transitions, 389 flow. Second operand has 11 states, 11 states have (on average 179.9090909090909) internal successors, (1979), 11 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:07,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:07,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 503 [2023-08-27 14:38:07,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:08,184 INFO L124 PetriNetUnfolderBase]: 3241/4675 cut-off events. [2023-08-27 14:38:08,184 INFO L125 PetriNetUnfolderBase]: For 1022/1022 co-relation queries the response was YES. [2023-08-27 14:38:08,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11215 conditions, 4675 events. 3241/4675 cut-off events. For 1022/1022 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22864 event pairs, 1007 based on Foata normal form. 268/2939 useless extension candidates. Maximal degree in co-relation 11194. Up to 1881 conditions per place. [2023-08-27 14:38:08,205 INFO L140 encePairwiseOnDemand]: 491/503 looper letters, 252 selfloop transitions, 23 changer transitions 2/277 dead transitions. [2023-08-27 14:38:08,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 277 transitions, 1611 flow [2023-08-27 14:38:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 14:38:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 14:38:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3060 transitions. [2023-08-27 14:38:08,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3802186878727634 [2023-08-27 14:38:08,214 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3060 transitions. [2023-08-27 14:38:08,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3060 transitions. [2023-08-27 14:38:08,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:08,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3060 transitions. [2023-08-27 14:38:08,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 191.25) internal successors, (3060), 16 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,232 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 503.0) internal successors, (8551), 17 states have internal predecessors, (8551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,233 INFO L175 Difference]: Start difference. First operand has 64 places, 78 transitions, 389 flow. Second operand 16 states and 3060 transitions. [2023-08-27 14:38:08,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 277 transitions, 1611 flow [2023-08-27 14:38:08,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 277 transitions, 1610 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:08,239 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 578 flow [2023-08-27 14:38:08,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=578, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2023-08-27 14:38:08,240 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-27 14:38:08,240 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 578 flow [2023-08-27 14:38:08,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 179.9090909090909) internal successors, (1979), 11 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:08,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:08,254 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 14:38:08,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:08,448 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:08,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:08,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2103775470, now seen corresponding path program 1 times [2023-08-27 14:38:08,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:08,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873115089] [2023-08-27 14:38:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:08,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:08,487 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 14:38:08,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:08,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873115089] [2023-08-27 14:38:08,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873115089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:08,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:08,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:08,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907907618] [2023-08-27 14:38:08,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:08,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:08,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:08,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:08,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:08,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 503 [2023-08-27 14:38:08,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 578 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:08,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 503 [2023-08-27 14:38:08,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:08,944 INFO L124 PetriNetUnfolderBase]: 2901/4235 cut-off events. [2023-08-27 14:38:08,944 INFO L125 PetriNetUnfolderBase]: For 2393/2393 co-relation queries the response was YES. [2023-08-27 14:38:08,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12223 conditions, 4235 events. 2901/4235 cut-off events. For 2393/2393 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20335 event pairs, 925 based on Foata normal form. 200/2743 useless extension candidates. Maximal degree in co-relation 12194. Up to 2204 conditions per place. [2023-08-27 14:38:08,965 INFO L140 encePairwiseOnDemand]: 500/503 looper letters, 101 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2023-08-27 14:38:08,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 824 flow [2023-08-27 14:38:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:08,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-27 14:38:08,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44731610337972166 [2023-08-27 14:38:08,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-27 14:38:08,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-27 14:38:08,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:08,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-27 14:38:08,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,985 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 578 flow. Second operand 3 states and 675 transitions. [2023-08-27 14:38:08,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 824 flow [2023-08-27 14:38:08,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 109 transitions, 793 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:09,000 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 547 flow [2023-08-27 14:38:09,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=547, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2023-08-27 14:38:09,002 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2023-08-27 14:38:09,002 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 547 flow [2023-08-27 14:38:09,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:09,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:09,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 14:38:09,003 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:09,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:09,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1265016224, now seen corresponding path program 1 times [2023-08-27 14:38:09,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:09,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881047496] [2023-08-27 14:38:09,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:09,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:09,097 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 14:38:09,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:09,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881047496] [2023-08-27 14:38:09,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881047496] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:09,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:09,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:38:09,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843400652] [2023-08-27 14:38:09,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:09,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:09,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:09,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:09,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:09,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 503 [2023-08-27 14:38:09,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 547 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:09,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 503 [2023-08-27 14:38:09,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:09,547 INFO L124 PetriNetUnfolderBase]: 2691/3938 cut-off events. [2023-08-27 14:38:09,547 INFO L125 PetriNetUnfolderBase]: For 6425/6695 co-relation queries the response was YES. [2023-08-27 14:38:09,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11152 conditions, 3938 events. 2691/3938 cut-off events. For 6425/6695 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 19121 event pairs, 529 based on Foata normal form. 358/2790 useless extension candidates. Maximal degree in co-relation 11123. Up to 3157 conditions per place. [2023-08-27 14:38:09,567 INFO L140 encePairwiseOnDemand]: 493/503 looper letters, 99 selfloop transitions, 5 changer transitions 3/110 dead transitions. [2023-08-27 14:38:09,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 110 transitions, 845 flow [2023-08-27 14:38:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-27 14:38:09,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44532803180914515 [2023-08-27 14:38:09,570 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-27 14:38:09,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-27 14:38:09,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:09,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-27 14:38:09,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,574 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 547 flow. Second operand 3 states and 672 transitions. [2023-08-27 14:38:09,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 110 transitions, 845 flow [2023-08-27 14:38:09,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 110 transitions, 823 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:09,582 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 550 flow [2023-08-27 14:38:09,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=550, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2023-08-27 14:38:09,582 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-27 14:38:09,582 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 550 flow [2023-08-27 14:38:09,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:09,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:09,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 14:38:09,583 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:09,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:09,583 INFO L85 PathProgramCache]: Analyzing trace with hash 792532038, now seen corresponding path program 2 times [2023-08-27 14:38:09,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:09,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129944749] [2023-08-27 14:38:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:09,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:38:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129944749] [2023-08-27 14:38:09,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129944749] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546755675] [2023-08-27 14:38:09,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:09,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:09,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:09,645 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 14:38:09,670 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 14:38:09,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:09,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:09,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:09,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:09,762 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 14:38:09,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:09,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546755675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:09,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:09,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 14:38:09,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886065759] [2023-08-27 14:38:09,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:09,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:09,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 14:38:09,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 503 [2023-08-27 14:38:09,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 550 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:09,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 503 [2023-08-27 14:38:09,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:10,089 INFO L124 PetriNetUnfolderBase]: 2414/3550 cut-off events. [2023-08-27 14:38:10,089 INFO L125 PetriNetUnfolderBase]: For 3930/4057 co-relation queries the response was YES. [2023-08-27 14:38:10,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11228 conditions, 3550 events. 2414/3550 cut-off events. For 3930/4057 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17124 event pairs, 1373 based on Foata normal form. 127/2493 useless extension candidates. Maximal degree in co-relation 11197. Up to 3545 conditions per place. [2023-08-27 14:38:10,104 INFO L140 encePairwiseOnDemand]: 501/503 looper letters, 87 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-08-27 14:38:10,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 91 transitions, 718 flow [2023-08-27 14:38:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 655 transitions. [2023-08-27 14:38:10,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340622929092114 [2023-08-27 14:38:10,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 655 transitions. [2023-08-27 14:38:10,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 655 transitions. [2023-08-27 14:38:10,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:10,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 655 transitions. [2023-08-27 14:38:10,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.33333333333334) internal successors, (655), 3 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,111 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 550 flow. Second operand 3 states and 655 transitions. [2023-08-27 14:38:10,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 91 transitions, 718 flow [2023-08-27 14:38:10,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 713 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:10,119 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 539 flow [2023-08-27 14:38:10,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=539, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2023-08-27 14:38:10,119 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2023-08-27 14:38:10,119 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 539 flow [2023-08-27 14:38:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:10,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:10,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 14:38:10,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:10,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:10,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:10,329 INFO L85 PathProgramCache]: Analyzing trace with hash -874646512, now seen corresponding path program 1 times [2023-08-27 14:38:10,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:10,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044936386] [2023-08-27 14:38:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:10,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:10,426 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 14:38:10,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:10,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044936386] [2023-08-27 14:38:10,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044936386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:10,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:10,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 14:38:10,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456613431] [2023-08-27 14:38:10,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:10,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:10,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:10,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:10,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:38:10,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 503 [2023-08-27 14:38:10,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 539 flow. Second operand has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:10,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 503 [2023-08-27 14:38:10,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:10,845 INFO L124 PetriNetUnfolderBase]: 2683/3993 cut-off events. [2023-08-27 14:38:10,845 INFO L125 PetriNetUnfolderBase]: For 4708/4872 co-relation queries the response was YES. [2023-08-27 14:38:10,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12430 conditions, 3993 events. 2683/3993 cut-off events. For 4708/4872 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 19907 event pairs, 1581 based on Foata normal form. 276/3063 useless extension candidates. Maximal degree in co-relation 12398. Up to 3533 conditions per place. [2023-08-27 14:38:10,865 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 74 selfloop transitions, 13 changer transitions 22/112 dead transitions. [2023-08-27 14:38:10,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 112 transitions, 850 flow [2023-08-27 14:38:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:38:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:38:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 797 transitions. [2023-08-27 14:38:10,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961232604373757 [2023-08-27 14:38:10,867 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 797 transitions. [2023-08-27 14:38:10,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 797 transitions. [2023-08-27 14:38:10,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:10,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 797 transitions. [2023-08-27 14:38:10,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 199.25) internal successors, (797), 4 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,872 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 539 flow. Second operand 4 states and 797 transitions. [2023-08-27 14:38:10,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 112 transitions, 850 flow [2023-08-27 14:38:10,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 112 transitions, 849 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:10,882 INFO L231 Difference]: Finished difference. Result has 87 places, 90 transitions, 567 flow [2023-08-27 14:38:10,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=87, PETRI_TRANSITIONS=90} [2023-08-27 14:38:10,883 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2023-08-27 14:38:10,883 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 90 transitions, 567 flow [2023-08-27 14:38:10,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 188.5) internal successors, (754), 4 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:10,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:10,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 14:38:10,883 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:10,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:10,884 INFO L85 PathProgramCache]: Analyzing trace with hash -615020482, now seen corresponding path program 1 times [2023-08-27 14:38:10,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:10,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639571613] [2023-08-27 14:38:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:10,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:10,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:10,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:10,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639571613] [2023-08-27 14:38:10,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639571613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:10,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:10,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:10,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497964350] [2023-08-27 14:38:10,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:10,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:10,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:10,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:10,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 503 [2023-08-27 14:38:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 90 transitions, 567 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 503 [2023-08-27 14:38:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:11,244 INFO L124 PetriNetUnfolderBase]: 1749/2597 cut-off events. [2023-08-27 14:38:11,244 INFO L125 PetriNetUnfolderBase]: For 2416/2446 co-relation queries the response was YES. [2023-08-27 14:38:11,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8300 conditions, 2597 events. 1749/2597 cut-off events. For 2416/2446 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 11130 event pairs, 405 based on Foata normal form. 48/1783 useless extension candidates. Maximal degree in co-relation 8267. Up to 2445 conditions per place. [2023-08-27 14:38:11,254 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 87 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-27 14:38:11,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 94 transitions, 752 flow [2023-08-27 14:38:11,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 670 transitions. [2023-08-27 14:38:11,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440026507620941 [2023-08-27 14:38:11,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 670 transitions. [2023-08-27 14:38:11,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 670 transitions. [2023-08-27 14:38:11,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:11,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 670 transitions. [2023-08-27 14:38:11,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.33333333333334) internal successors, (670), 3 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,260 INFO L175 Difference]: Start difference. First operand has 87 places, 90 transitions, 567 flow. Second operand 3 states and 670 transitions. [2023-08-27 14:38:11,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 94 transitions, 752 flow [2023-08-27 14:38:11,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 709 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:11,271 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 526 flow [2023-08-27 14:38:11,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=526, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2023-08-27 14:38:11,272 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2023-08-27 14:38:11,272 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 526 flow [2023-08-27 14:38:11,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:11,272 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 14:38:11,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-27 14:38:11,272 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:11,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:11,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1409315018, now seen corresponding path program 2 times [2023-08-27 14:38:11,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:11,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311759978] [2023-08-27 14:38:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:11,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311759978] [2023-08-27 14:38:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311759978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320774347] [2023-08-27 14:38:11,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:11,441 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 14:38:11,464 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 14:38:11,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:11,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:11,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:38:11,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-27 14:38:11,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:11,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320774347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:11,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:11,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 14:38:11,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836493555] [2023-08-27 14:38:11,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:11,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:11,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:11,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:11,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:38:11,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 503 [2023-08-27 14:38:11,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 526 flow. Second operand has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:11,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 503 [2023-08-27 14:38:11,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:11,778 INFO L124 PetriNetUnfolderBase]: 1320/1959 cut-off events. [2023-08-27 14:38:11,778 INFO L125 PetriNetUnfolderBase]: For 2413/2438 co-relation queries the response was YES. [2023-08-27 14:38:11,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 1959 events. 1320/1959 cut-off events. For 2413/2438 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7948 event pairs, 648 based on Foata normal form. 146/1447 useless extension candidates. Maximal degree in co-relation 6338. Up to 1957 conditions per place. [2023-08-27 14:38:11,786 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 77 selfloop transitions, 1 changer transitions 3/83 dead transitions. [2023-08-27 14:38:11,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 83 transitions, 633 flow [2023-08-27 14:38:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-27 14:38:11,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115308151093439 [2023-08-27 14:38:11,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-27 14:38:11,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-27 14:38:11,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:11,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-27 14:38:11,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,791 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 503.0) internal successors, (2012), 4 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,792 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 526 flow. Second operand 3 states and 621 transitions. [2023-08-27 14:38:11,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 83 transitions, 633 flow [2023-08-27 14:38:11,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 83 transitions, 528 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-08-27 14:38:11,798 INFO L231 Difference]: Finished difference. Result has 67 places, 80 transitions, 349 flow [2023-08-27 14:38:11,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=349, PETRI_PLACES=67, PETRI_TRANSITIONS=80} [2023-08-27 14:38:11,798 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2023-08-27 14:38:11,798 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 80 transitions, 349 flow [2023-08-27 14:38:11,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:11,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:11,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 14:38:12,004 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,SelfDestructingSolverStorable14 [2023-08-27 14:38:12,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:12,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:12,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1982621874, now seen corresponding path program 1 times [2023-08-27 14:38:12,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:12,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471655796] [2023-08-27 14:38:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:12,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:12,674 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 14:38:12,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:12,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471655796] [2023-08-27 14:38:12,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471655796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:12,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153351334] [2023-08-27 14:38:12,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:12,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:12,677 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 14:38:12,679 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 14:38:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:12,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 14:38:12,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:12,867 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 14:38:12,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 14:38:12,937 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 14:38:13,008 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 14:38:13,008 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 11 treesize of output 11 [2023-08-27 14:38:13,074 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 14:38:13,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:13,121 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 14:38:13,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:13,241 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 14:38:13,336 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 14:38:13,337 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 25 treesize of output 12 [2023-08-27 14:38:13,363 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 14:38:13,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:13,442 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_571) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649))) is different from false [2023-08-27 14:38:13,671 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:13,671 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 34 treesize of output 35 [2023-08-27 14:38:13,683 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:13,683 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 165 [2023-08-27 14:38:13,691 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 152 treesize of output 128 [2023-08-27 14:38:13,698 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 128 treesize of output 116 [2023-08-27 14:38:13,707 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 60 treesize of output 54 [2023-08-27 14:38:13,857 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 14:38:13,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153351334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:13,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:13,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 14:38:13,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359251108] [2023-08-27 14:38:13,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:13,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 14:38:13,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:13,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 14:38:13,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=655, Unknown=3, NotChecked=52, Total=812 [2023-08-27 14:38:13,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 14:38:13,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 80 transitions, 349 flow. Second operand has 29 states, 29 states have (on average 147.24137931034483) internal successors, (4270), 29 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:13,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:13,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 14:38:13,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:14,419 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_571 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_571) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649))))) (and (or (<= c_~n1~0 c_~q1_back~0) (< c_~q1_back~0 0) .cse0) .cse0)) is different from false [2023-08-27 14:38:15,217 INFO L124 PetriNetUnfolderBase]: 1504/2276 cut-off events. [2023-08-27 14:38:15,217 INFO L125 PetriNetUnfolderBase]: For 1022/1049 co-relation queries the response was YES. [2023-08-27 14:38:15,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6672 conditions, 2276 events. 1504/2276 cut-off events. For 1022/1049 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10002 event pairs, 406 based on Foata normal form. 27/1545 useless extension candidates. Maximal degree in co-relation 6653. Up to 1298 conditions per place. [2023-08-27 14:38:15,225 INFO L140 encePairwiseOnDemand]: 487/503 looper letters, 141 selfloop transitions, 38 changer transitions 0/181 dead transitions. [2023-08-27 14:38:15,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 181 transitions, 1079 flow [2023-08-27 14:38:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 14:38:15,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 14:38:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2595 transitions. [2023-08-27 14:38:15,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3034732779791837 [2023-08-27 14:38:15,232 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2595 transitions. [2023-08-27 14:38:15,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2595 transitions. [2023-08-27 14:38:15,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:15,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2595 transitions. [2023-08-27 14:38:15,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 152.64705882352942) internal successors, (2595), 17 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 14:38:15,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 503.0) internal successors, (9054), 18 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:15,249 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 503.0) internal successors, (9054), 18 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:15,249 INFO L175 Difference]: Start difference. First operand has 67 places, 80 transitions, 349 flow. Second operand 17 states and 2595 transitions. [2023-08-27 14:38:15,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 181 transitions, 1079 flow [2023-08-27 14:38:15,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 181 transitions, 1060 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:15,255 INFO L231 Difference]: Finished difference. Result has 86 places, 112 transitions, 632 flow [2023-08-27 14:38:15,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=632, PETRI_PLACES=86, PETRI_TRANSITIONS=112} [2023-08-27 14:38:15,256 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2023-08-27 14:38:15,256 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 112 transitions, 632 flow [2023-08-27 14:38:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 147.24137931034483) internal successors, (4270), 29 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:15,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:15,257 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:15,265 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 14:38:15,463 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,SelfDestructingSolverStorable15 [2023-08-27 14:38:15,463 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:15,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1171082864, now seen corresponding path program 1 times [2023-08-27 14:38:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:15,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426001102] [2023-08-27 14:38:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:16,095 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 14:38:16,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426001102] [2023-08-27 14:38:16,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426001102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:16,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506611467] [2023-08-27 14:38:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:16,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:16,097 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 14:38:16,108 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 14:38:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:16,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 14:38:16,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:16,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:16,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:38:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:16,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:16,453 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_624 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_624) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483648)) is different from false [2023-08-27 14:38:16,463 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:16,464 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 42 treesize of output 34 [2023-08-27 14:38:16,472 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 9 treesize of output 3 [2023-08-27 14:38:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:38:16,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506611467] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:16,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:38:16,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 20 [2023-08-27 14:38:16,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642700883] [2023-08-27 14:38:16,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:16,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:38:16,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:16,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:38:16,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=368, Unknown=1, NotChecked=38, Total=462 [2023-08-27 14:38:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:38:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 632 flow. Second operand has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:16,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:16,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:38:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:17,015 INFO L124 PetriNetUnfolderBase]: 1873/2804 cut-off events. [2023-08-27 14:38:17,015 INFO L125 PetriNetUnfolderBase]: For 4796/4850 co-relation queries the response was YES. [2023-08-27 14:38:17,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10141 conditions, 2804 events. 1873/2804 cut-off events. For 4796/4850 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12545 event pairs, 318 based on Foata normal form. 52/2384 useless extension candidates. Maximal degree in co-relation 10113. Up to 1365 conditions per place. [2023-08-27 14:38:17,029 INFO L140 encePairwiseOnDemand]: 486/503 looper letters, 135 selfloop transitions, 68 changer transitions 0/205 dead transitions. [2023-08-27 14:38:17,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 205 transitions, 1540 flow [2023-08-27 14:38:17,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:38:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:38:17,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1500 transitions. [2023-08-27 14:38:17,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727634194831014 [2023-08-27 14:38:17,032 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1500 transitions. [2023-08-27 14:38:17,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1500 transitions. [2023-08-27 14:38:17,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:17,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1500 transitions. [2023-08-27 14:38:17,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 187.5) internal successors, (1500), 8 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:17,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 503.0) internal successors, (4527), 9 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:17,038 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 503.0) internal successors, (4527), 9 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:17,038 INFO L175 Difference]: Start difference. First operand has 86 places, 112 transitions, 632 flow. Second operand 8 states and 1500 transitions. [2023-08-27 14:38:17,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 205 transitions, 1540 flow [2023-08-27 14:38:17,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 205 transitions, 1509 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:17,057 INFO L231 Difference]: Finished difference. Result has 96 places, 158 transitions, 1185 flow [2023-08-27 14:38:17,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1185, PETRI_PLACES=96, PETRI_TRANSITIONS=158} [2023-08-27 14:38:17,057 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-27 14:38:17,057 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 158 transitions, 1185 flow [2023-08-27 14:38:17,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:17,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:17,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:17,066 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 14:38:17,263 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,SelfDestructingSolverStorable16 [2023-08-27 14:38:17,263 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:17,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2047474664, now seen corresponding path program 1 times [2023-08-27 14:38:17,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:17,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287871617] [2023-08-27 14:38:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:17,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:17,727 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 14:38:17,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:17,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287871617] [2023-08-27 14:38:17,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287871617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:17,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092245440] [2023-08-27 14:38:17,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:17,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:17,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:17,729 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 14:38:17,754 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 14:38:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:17,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 14:38:17,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:17,914 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 14:38:17,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:17,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:38:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:18,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:38:18,084 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 14:38:18,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:18,256 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:18,257 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 14:38:18,266 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:18,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-27 14:38:18,271 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-27 14:38:18,277 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 30 treesize of output 24 [2023-08-27 14:38:18,387 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 14:38:18,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092245440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:18,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:18,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-27 14:38:18,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860065276] [2023-08-27 14:38:18,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:18,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 14:38:18,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:18,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 14:38:18,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=317, Unknown=3, NotChecked=0, Total=380 [2023-08-27 14:38:18,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 503 [2023-08-27 14:38:18,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 158 transitions, 1185 flow. Second operand has 20 states, 20 states have (on average 152.7) internal successors, (3054), 20 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:18,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:18,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 503 [2023-08-27 14:38:18,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:22,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:24,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:25,303 INFO L124 PetriNetUnfolderBase]: 2186/3310 cut-off events. [2023-08-27 14:38:25,303 INFO L125 PetriNetUnfolderBase]: For 11402/11492 co-relation queries the response was YES. [2023-08-27 14:38:25,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 3310 events. 2186/3310 cut-off events. For 11402/11492 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15596 event pairs, 641 based on Foata normal form. 97/3155 useless extension candidates. Maximal degree in co-relation 14996. Up to 2840 conditions per place. [2023-08-27 14:38:25,319 INFO L140 encePairwiseOnDemand]: 492/503 looper letters, 218 selfloop transitions, 110 changer transitions 0/330 dead transitions. [2023-08-27 14:38:25,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 330 transitions, 3347 flow [2023-08-27 14:38:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 14:38:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 14:38:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2045 transitions. [2023-08-27 14:38:25,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31273895090992504 [2023-08-27 14:38:25,323 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2045 transitions. [2023-08-27 14:38:25,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2045 transitions. [2023-08-27 14:38:25,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:25,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2045 transitions. [2023-08-27 14:38:25,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 157.30769230769232) internal successors, (2045), 13 states have internal predecessors, (2045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:25,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 503.0) internal successors, (7042), 14 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:25,331 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 503.0) internal successors, (7042), 14 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:25,331 INFO L175 Difference]: Start difference. First operand has 96 places, 158 transitions, 1185 flow. Second operand 13 states and 2045 transitions. [2023-08-27 14:38:25,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 330 transitions, 3347 flow [2023-08-27 14:38:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 330 transitions, 3262 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:25,382 INFO L231 Difference]: Finished difference. Result has 109 places, 231 transitions, 2127 flow [2023-08-27 14:38:25,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2127, PETRI_PLACES=109, PETRI_TRANSITIONS=231} [2023-08-27 14:38:25,382 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2023-08-27 14:38:25,382 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 231 transitions, 2127 flow [2023-08-27 14:38:25,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 152.7) internal successors, (3054), 20 states have internal predecessors, (3054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:25,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:25,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:25,391 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 14:38:25,591 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,SelfDestructingSolverStorable17 [2023-08-27 14:38:25,592 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:25,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:25,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1503197747, now seen corresponding path program 1 times [2023-08-27 14:38:25,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891362591] [2023-08-27 14:38:25,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:25,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891362591] [2023-08-27 14:38:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891362591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272396678] [2023-08-27 14:38:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:25,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:25,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:25,945 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 14:38:25,972 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 14:38:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:26,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 14:38:26,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:26,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:26,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:26,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:26,128 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 14:38:26,129 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 14:38:26,187 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 14:38:26,236 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 14:38:26,236 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 11 treesize of output 11 [2023-08-27 14:38:26,281 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 14:38:26,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:38:26,358 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 14:38:26,403 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 14:38:26,475 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:38:26,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:26,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-27 14:38:26,489 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 14:38:26,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:26,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:26,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 62 [2023-08-27 14:38:26,935 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 14:38:26,936 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 5260 treesize of output 5135 [2023-08-27 14:38:26,990 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 14:38:26,991 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 624 treesize of output 528 [2023-08-27 14:38:27,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:38:27,008 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 390 treesize of output 378 [2023-08-27 14:38:27,026 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 14:38:27,027 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 516 treesize of output 468 [2023-08-27 14:38:27,047 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 14:38:27,047 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 353 treesize of output 329 [2023-08-27 14:38:27,278 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 14:38:27,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272396678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:27,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:27,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 25 [2023-08-27 14:38:27,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341847199] [2023-08-27 14:38:27,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:27,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 14:38:27,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:27,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 14:38:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=534, Unknown=20, NotChecked=0, Total=702 [2023-08-27 14:38:27,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 503 [2023-08-27 14:38:27,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 231 transitions, 2127 flow. Second operand has 27 states, 27 states have (on average 146.44444444444446) internal successors, (3954), 27 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:27,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:27,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 503 [2023-08-27 14:38:27,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:29,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:38:33,528 INFO L124 PetriNetUnfolderBase]: 2914/4569 cut-off events. [2023-08-27 14:38:33,528 INFO L125 PetriNetUnfolderBase]: For 18733/18847 co-relation queries the response was YES. [2023-08-27 14:38:33,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20976 conditions, 4569 events. 2914/4569 cut-off events. For 18733/18847 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24793 event pairs, 552 based on Foata normal form. 150/4267 useless extension candidates. Maximal degree in co-relation 20939. Up to 1614 conditions per place. [2023-08-27 14:38:33,550 INFO L140 encePairwiseOnDemand]: 487/503 looper letters, 410 selfloop transitions, 164 changer transitions 0/576 dead transitions. [2023-08-27 14:38:33,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 576 transitions, 5813 flow [2023-08-27 14:38:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 14:38:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 14:38:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4621 transitions. [2023-08-27 14:38:33,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3062292909211398 [2023-08-27 14:38:33,554 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4621 transitions. [2023-08-27 14:38:33,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4621 transitions. [2023-08-27 14:38:33,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:33,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4621 transitions. [2023-08-27 14:38:33,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 154.03333333333333) internal successors, (4621), 30 states have internal predecessors, (4621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:33,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 503.0) internal successors, (15593), 31 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:33,573 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 503.0) internal successors, (15593), 31 states have internal predecessors, (15593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:33,573 INFO L175 Difference]: Start difference. First operand has 109 places, 231 transitions, 2127 flow. Second operand 30 states and 4621 transitions. [2023-08-27 14:38:33,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 576 transitions, 5813 flow [2023-08-27 14:38:33,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 576 transitions, 5680 flow, removed 46 selfloop flow, removed 4 redundant places. [2023-08-27 14:38:33,668 INFO L231 Difference]: Finished difference. Result has 149 places, 348 transitions, 3902 flow [2023-08-27 14:38:33,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=2068, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3902, PETRI_PLACES=149, PETRI_TRANSITIONS=348} [2023-08-27 14:38:33,669 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 97 predicate places. [2023-08-27 14:38:33,669 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 348 transitions, 3902 flow [2023-08-27 14:38:33,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 146.44444444444446) internal successors, (3954), 27 states have internal predecessors, (3954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:33,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:33,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:33,676 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 14:38:33,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:33,875 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:33,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:33,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1665831308, now seen corresponding path program 2 times [2023-08-27 14:38:33,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:33,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749944138] [2023-08-27 14:38:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:33,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:34,525 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 14:38:34,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749944138] [2023-08-27 14:38:34,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749944138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:34,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379420516] [2023-08-27 14:38:34,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:34,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:34,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:34,529 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 14:38:34,553 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 14:38:34,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:34,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:34,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:38:34,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:34,793 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379420516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2023-08-27 14:38:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078539315] [2023-08-27 14:38:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:38:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:38:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:38:34,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 14:38:34,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 348 transitions, 3902 flow. Second operand has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:34,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:34,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 14:38:34,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:35,537 INFO L124 PetriNetUnfolderBase]: 3244/5156 cut-off events. [2023-08-27 14:38:35,537 INFO L125 PetriNetUnfolderBase]: For 28685/28807 co-relation queries the response was YES. [2023-08-27 14:38:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25493 conditions, 5156 events. 3244/5156 cut-off events. For 28685/28807 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 29055 event pairs, 1118 based on Foata normal form. 135/4735 useless extension candidates. Maximal degree in co-relation 25440. Up to 4017 conditions per place. [2023-08-27 14:38:35,569 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 358 selfloop transitions, 59 changer transitions 0/419 dead transitions. [2023-08-27 14:38:35,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 419 transitions, 5426 flow [2023-08-27 14:38:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:38:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:38:35,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1003 transitions. [2023-08-27 14:38:35,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880715705765407 [2023-08-27 14:38:35,571 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1003 transitions. [2023-08-27 14:38:35,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1003 transitions. [2023-08-27 14:38:35,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:35,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1003 transitions. [2023-08-27 14:38:35,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.6) internal successors, (1003), 5 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:35,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:35,574 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:35,574 INFO L175 Difference]: Start difference. First operand has 149 places, 348 transitions, 3902 flow. Second operand 5 states and 1003 transitions. [2023-08-27 14:38:35,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 419 transitions, 5426 flow [2023-08-27 14:38:35,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 419 transitions, 5362 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:35,685 INFO L231 Difference]: Finished difference. Result has 152 places, 358 transitions, 4147 flow [2023-08-27 14:38:35,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4147, PETRI_PLACES=152, PETRI_TRANSITIONS=358} [2023-08-27 14:38:35,686 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 100 predicate places. [2023-08-27 14:38:35,686 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 358 transitions, 4147 flow [2023-08-27 14:38:35,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:35,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:35,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:35,692 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 14:38:35,888 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,SelfDestructingSolverStorable19 [2023-08-27 14:38:35,888 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:35,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:35,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1665814010, now seen corresponding path program 1 times [2023-08-27 14:38:35,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:35,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143000585] [2023-08-27 14:38:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:36,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143000585] [2023-08-27 14:38:36,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143000585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398382760] [2023-08-27 14:38:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:36,340 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 14:38:36,362 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 14:38:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:36,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:38:36,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:36,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:36,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398382760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:36,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:36,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 14:38:36,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880098810] [2023-08-27 14:38:36,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:36,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:38:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:38:36,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:38:36,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 14:38:36,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 358 transitions, 4147 flow. Second operand has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:36,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:36,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 14:38:36,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:37,385 INFO L124 PetriNetUnfolderBase]: 3549/5606 cut-off events. [2023-08-27 14:38:37,385 INFO L125 PetriNetUnfolderBase]: For 32892/33008 co-relation queries the response was YES. [2023-08-27 14:38:37,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28395 conditions, 5606 events. 3549/5606 cut-off events. For 32892/33008 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31756 event pairs, 1058 based on Foata normal form. 136/5136 useless extension candidates. Maximal degree in co-relation 28339. Up to 4177 conditions per place. [2023-08-27 14:38:37,413 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 351 selfloop transitions, 73 changer transitions 0/426 dead transitions. [2023-08-27 14:38:37,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 426 transitions, 5634 flow [2023-08-27 14:38:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:38:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:38:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1006 transitions. [2023-08-27 14:38:37,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-08-27 14:38:37,415 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1006 transitions. [2023-08-27 14:38:37,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1006 transitions. [2023-08-27 14:38:37,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:37,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1006 transitions. [2023-08-27 14:38:37,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 201.2) internal successors, (1006), 5 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:37,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:37,419 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:37,419 INFO L175 Difference]: Start difference. First operand has 152 places, 358 transitions, 4147 flow. Second operand 5 states and 1006 transitions. [2023-08-27 14:38:37,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 426 transitions, 5634 flow [2023-08-27 14:38:37,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 426 transitions, 5574 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:37,571 INFO L231 Difference]: Finished difference. Result has 156 places, 370 transitions, 4491 flow [2023-08-27 14:38:37,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4491, PETRI_PLACES=156, PETRI_TRANSITIONS=370} [2023-08-27 14:38:37,572 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2023-08-27 14:38:37,572 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 370 transitions, 4491 flow [2023-08-27 14:38:37,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.0) internal successors, (1134), 6 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:37,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:37,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:37,581 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 14:38:37,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:37,781 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:37,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:37,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1797020866, now seen corresponding path program 2 times [2023-08-27 14:38:37,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:37,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292016900] [2023-08-27 14:38:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:37,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:38,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:38,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292016900] [2023-08-27 14:38:38,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292016900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:38,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699629932] [2023-08-27 14:38:38,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:38,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:38,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:38,205 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 14:38:38,225 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 14:38:38,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:38,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:38,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 14:38:38,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:38,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:38,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:38:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:38,458 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:38,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699629932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:38,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:38,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 14:38:38,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266966502] [2023-08-27 14:38:38,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:38,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:38:38,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:38,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:38:38,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:38:38,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:38:38,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 370 transitions, 4491 flow. Second operand has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:38,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:38,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:38:38,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:39,449 INFO L124 PetriNetUnfolderBase]: 3916/6193 cut-off events. [2023-08-27 14:38:39,449 INFO L125 PetriNetUnfolderBase]: For 37769/37885 co-relation queries the response was YES. [2023-08-27 14:38:39,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31412 conditions, 6193 events. 3916/6193 cut-off events. For 37769/37885 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35582 event pairs, 1199 based on Foata normal form. 146/5631 useless extension candidates. Maximal degree in co-relation 31354. Up to 4441 conditions per place. [2023-08-27 14:38:39,486 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 324 selfloop transitions, 121 changer transitions 0/447 dead transitions. [2023-08-27 14:38:39,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 447 transitions, 6062 flow [2023-08-27 14:38:39,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:38:39,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:38:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1319 transitions. [2023-08-27 14:38:39,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3746094859414939 [2023-08-27 14:38:39,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1319 transitions. [2023-08-27 14:38:39,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1319 transitions. [2023-08-27 14:38:39,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:39,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1319 transitions. [2023-08-27 14:38:39,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.42857142857142) internal successors, (1319), 7 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,491 INFO L175 Difference]: Start difference. First operand has 156 places, 370 transitions, 4491 flow. Second operand 7 states and 1319 transitions. [2023-08-27 14:38:39,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 447 transitions, 6062 flow [2023-08-27 14:38:39,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 447 transitions, 5974 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:39,642 INFO L231 Difference]: Finished difference. Result has 163 places, 383 transitions, 4993 flow [2023-08-27 14:38:39,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4369, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4993, PETRI_PLACES=163, PETRI_TRANSITIONS=383} [2023-08-27 14:38:39,643 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2023-08-27 14:38:39,643 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 383 transitions, 4993 flow [2023-08-27 14:38:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.5) internal successors, (1428), 8 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:39,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:39,649 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 14:38:39,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:39,844 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:39,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:39,844 INFO L85 PathProgramCache]: Analyzing trace with hash 101164787, now seen corresponding path program 1 times [2023-08-27 14:38:39,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:39,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395179665] [2023-08-27 14:38:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:40,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:40,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395179665] [2023-08-27 14:38:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395179665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171290319] [2023-08-27 14:38:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:40,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:40,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:40,158 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 14:38:40,159 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 14:38:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:40,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 14:38:40,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:40,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:40,351 INFO L322 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2023-08-27 14:38:40,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2023-08-27 14:38:40,406 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 14:38:40,470 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 14:38:40,470 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 11 treesize of output 11 [2023-08-27 14:38:40,517 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 14:38:40,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:40,565 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 14:38:40,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:40,624 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 14:38:40,763 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 14:38:40,763 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 25 treesize of output 12 [2023-08-27 14:38:40,790 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 14:38:40,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:43,140 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:43,140 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 34 treesize of output 35 [2023-08-27 14:38:43,152 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:38:43,153 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 343 treesize of output 327 [2023-08-27 14:38:43,161 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 152 treesize of output 128 [2023-08-27 14:38:43,169 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 61 treesize of output 55 [2023-08-27 14:38:43,177 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 66 treesize of output 54 [2023-08-27 14:38:43,328 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 14:38:43,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171290319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:43,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:43,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-27 14:38:43,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129510490] [2023-08-27 14:38:43,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:43,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 14:38:43,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:43,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 14:38:43,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=559, Unknown=5, NotChecked=0, Total=650 [2023-08-27 14:38:43,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 14:38:43,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 383 transitions, 4993 flow. Second operand has 26 states, 26 states have (on average 147.5) internal successors, (3835), 26 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:43,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:43,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 14:38:43,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:51,857 INFO L124 PetriNetUnfolderBase]: 4975/7897 cut-off events. [2023-08-27 14:38:51,858 INFO L125 PetriNetUnfolderBase]: For 54259/54383 co-relation queries the response was YES. [2023-08-27 14:38:51,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40984 conditions, 7897 events. 4975/7897 cut-off events. For 54259/54383 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 48211 event pairs, 1132 based on Foata normal form. 235/7182 useless extension candidates. Maximal degree in co-relation 40923. Up to 3359 conditions per place. [2023-08-27 14:38:51,900 INFO L140 encePairwiseOnDemand]: 488/503 looper letters, 444 selfloop transitions, 342 changer transitions 1/789 dead transitions. [2023-08-27 14:38:51,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 789 transitions, 10052 flow [2023-08-27 14:38:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 14:38:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 14:38:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5403 transitions. [2023-08-27 14:38:51,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3069014484521443 [2023-08-27 14:38:51,906 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5403 transitions. [2023-08-27 14:38:51,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5403 transitions. [2023-08-27 14:38:51,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:51,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5403 transitions. [2023-08-27 14:38:51,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 154.37142857142857) internal successors, (5403), 35 states have internal predecessors, (5403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:51,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 503.0) internal successors, (18108), 36 states have internal predecessors, (18108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:51,925 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 503.0) internal successors, (18108), 36 states have internal predecessors, (18108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:51,926 INFO L175 Difference]: Start difference. First operand has 163 places, 383 transitions, 4993 flow. Second operand 35 states and 5403 transitions. [2023-08-27 14:38:51,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 789 transitions, 10052 flow [2023-08-27 14:38:52,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 789 transitions, 9823 flow, removed 34 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:52,147 INFO L231 Difference]: Finished difference. Result has 211 places, 550 transitions, 8480 flow [2023-08-27 14:38:52,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8480, PETRI_PLACES=211, PETRI_TRANSITIONS=550} [2023-08-27 14:38:52,148 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 159 predicate places. [2023-08-27 14:38:52,148 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 550 transitions, 8480 flow [2023-08-27 14:38:52,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 147.5) internal successors, (3835), 26 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:52,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:52,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:52,157 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 14:38:52,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-27 14:38:52,354 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:52,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:52,355 INFO L85 PathProgramCache]: Analyzing trace with hash -272304141, now seen corresponding path program 2 times [2023-08-27 14:38:52,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:52,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012344780] [2023-08-27 14:38:52,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:52,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:52,883 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 14:38:52,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:52,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012344780] [2023-08-27 14:38:52,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012344780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:52,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077299852] [2023-08-27 14:38:52,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:52,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:52,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:52,889 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 14:38:52,899 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 14:38:53,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:53,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:53,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 14:38:53,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:38:53,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:53,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077299852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:53,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:53,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-08-27 14:38:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105164061] [2023-08-27 14:38:53,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:38:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:38:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:38:53,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 14:38:53,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 550 transitions, 8480 flow. Second operand has 6 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:53,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:53,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 14:38:53,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:54,499 INFO L124 PetriNetUnfolderBase]: 4940/7840 cut-off events. [2023-08-27 14:38:54,500 INFO L125 PetriNetUnfolderBase]: For 76317/76443 co-relation queries the response was YES. [2023-08-27 14:38:54,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45665 conditions, 7840 events. 4940/7840 cut-off events. For 76317/76443 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47413 event pairs, 1826 based on Foata normal form. 134/7034 useless extension candidates. Maximal degree in co-relation 45587. Up to 6723 conditions per place. [2023-08-27 14:38:54,558 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 520 selfloop transitions, 83 changer transitions 0/605 dead transitions. [2023-08-27 14:38:54,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 605 transitions, 10325 flow [2023-08-27 14:38:54,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:38:54,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:38:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2023-08-27 14:38:54,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984095427435388 [2023-08-27 14:38:54,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2023-08-27 14:38:54,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2023-08-27 14:38:54,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:54,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2023-08-27 14:38:54,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:54,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:54,681 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:54,681 INFO L175 Difference]: Start difference. First operand has 211 places, 550 transitions, 8480 flow. Second operand 5 states and 1002 transitions. [2023-08-27 14:38:54,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 605 transitions, 10325 flow [2023-08-27 14:38:55,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 605 transitions, 10035 flow, removed 129 selfloop flow, removed 6 redundant places. [2023-08-27 14:38:55,151 INFO L231 Difference]: Finished difference. Result has 210 places, 550 transitions, 8387 flow [2023-08-27 14:38:55,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=8202, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=8387, PETRI_PLACES=210, PETRI_TRANSITIONS=550} [2023-08-27 14:38:55,151 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 158 predicate places. [2023-08-27 14:38:55,152 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 550 transitions, 8387 flow [2023-08-27 14:38:55,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:55,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:55,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:55,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-27 14:38:55,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:55,352 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:55,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:55,353 INFO L85 PathProgramCache]: Analyzing trace with hash -307448775, now seen corresponding path program 1 times [2023-08-27 14:38:55,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:55,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881494930] [2023-08-27 14:38:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:55,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:56,108 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 14:38:56,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881494930] [2023-08-27 14:38:56,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881494930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:56,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682111469] [2023-08-27 14:38:56,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:56,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:56,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:56,113 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 14:38:56,116 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 14:38:56,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:56,248 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 14:38:56,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:56,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:56,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:38:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:56,409 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:56,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682111469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:56,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:56,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 14:38:56,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454182301] [2023-08-27 14:38:56,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:56,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:38:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:38:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:38:56,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:38:56,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 550 transitions, 8387 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:56,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:56,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:38:56,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:58,094 INFO L124 PetriNetUnfolderBase]: 5280/8462 cut-off events. [2023-08-27 14:38:58,094 INFO L125 PetriNetUnfolderBase]: For 79943/80069 co-relation queries the response was YES. [2023-08-27 14:38:58,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48387 conditions, 8462 events. 5280/8462 cut-off events. For 79943/80069 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 53322 event pairs, 1461 based on Foata normal form. 132/7540 useless extension candidates. Maximal degree in co-relation 48308. Up to 7147 conditions per place. [2023-08-27 14:38:58,155 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 532 selfloop transitions, 86 changer transitions 0/620 dead transitions. [2023-08-27 14:38:58,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 620 transitions, 10408 flow [2023-08-27 14:38:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:38:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:38:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1314 transitions. [2023-08-27 14:38:58,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3731894348196535 [2023-08-27 14:38:58,158 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1314 transitions. [2023-08-27 14:38:58,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1314 transitions. [2023-08-27 14:38:58,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:58,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1314 transitions. [2023-08-27 14:38:58,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.71428571428572) internal successors, (1314), 7 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:58,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:58,161 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:58,161 INFO L175 Difference]: Start difference. First operand has 210 places, 550 transitions, 8387 flow. Second operand 7 states and 1314 transitions. [2023-08-27 14:38:58,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 620 transitions, 10408 flow [2023-08-27 14:38:58,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 620 transitions, 10230 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-27 14:38:58,672 INFO L231 Difference]: Finished difference. Result has 213 places, 564 transitions, 8668 flow [2023-08-27 14:38:58,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=8213, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8668, PETRI_PLACES=213, PETRI_TRANSITIONS=564} [2023-08-27 14:38:58,673 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 161 predicate places. [2023-08-27 14:38:58,673 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 564 transitions, 8668 flow [2023-08-27 14:38:58,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:58,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:58,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:58,679 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 14:38:58,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:58,874 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:38:58,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:58,874 INFO L85 PathProgramCache]: Analyzing trace with hash -307448937, now seen corresponding path program 3 times [2023-08-27 14:38:58,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:58,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086639958] [2023-08-27 14:38:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:58,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:59,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086639958] [2023-08-27 14:38:59,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086639958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:59,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459694184] [2023-08-27 14:38:59,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:38:59,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:59,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:59,333 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 14:38:59,360 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 14:38:59,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:38:59,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:59,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:38:59,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:59,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:38:59,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:38:59,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:38:59,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:59,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459694184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:59,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:59,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 14:38:59,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097315089] [2023-08-27 14:38:59,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:59,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:38:59,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:59,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:38:59,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:38:59,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:38:59,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 564 transitions, 8668 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:59,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:59,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:38:59,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:01,452 INFO L124 PetriNetUnfolderBase]: 5232/8372 cut-off events. [2023-08-27 14:39:01,453 INFO L125 PetriNetUnfolderBase]: For 79418/79544 co-relation queries the response was YES. [2023-08-27 14:39:01,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48329 conditions, 8372 events. 5232/8372 cut-off events. For 79418/79544 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 52473 event pairs, 1446 based on Foata normal form. 132/7474 useless extension candidates. Maximal degree in co-relation 48249. Up to 7147 conditions per place. [2023-08-27 14:39:01,504 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 531 selfloop transitions, 86 changer transitions 0/619 dead transitions. [2023-08-27 14:39:01,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 619 transitions, 10462 flow [2023-08-27 14:39:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:39:01,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:39:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2023-08-27 14:39:01,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729054245952854 [2023-08-27 14:39:01,506 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2023-08-27 14:39:01,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2023-08-27 14:39:01,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:39:01,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2023-08-27 14:39:01,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:01,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:01,509 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:01,509 INFO L175 Difference]: Start difference. First operand has 213 places, 564 transitions, 8668 flow. Second operand 7 states and 1313 transitions. [2023-08-27 14:39:01,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 619 transitions, 10462 flow [2023-08-27 14:39:01,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 619 transitions, 10392 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-27 14:39:01,976 INFO L231 Difference]: Finished difference. Result has 218 places, 564 transitions, 8784 flow [2023-08-27 14:39:01,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=8598, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8784, PETRI_PLACES=218, PETRI_TRANSITIONS=564} [2023-08-27 14:39:01,977 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2023-08-27 14:39:01,977 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 564 transitions, 8784 flow [2023-08-27 14:39:01,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:01,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:39:01,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:39:01,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-27 14:39:02,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:02,178 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:39:02,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:39:02,178 INFO L85 PathProgramCache]: Analyzing trace with hash -326782335, now seen corresponding path program 2 times [2023-08-27 14:39:02,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:39:02,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536336180] [2023-08-27 14:39:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:02,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:39:02,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:03,124 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 14:39:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:39:03,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536336180] [2023-08-27 14:39:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536336180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880694319] [2023-08-27 14:39:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:39:03,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:39:03,126 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 14:39:03,146 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 14:39:03,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:39:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:39:03,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:39:03,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:39:03,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:03,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:39:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:39:03,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:39:03,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880694319] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:39:03,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:39:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 14:39:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067255724] [2023-08-27 14:39:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:39:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:39:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:39:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:39:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:39:03,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:39:03,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 564 transitions, 8784 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:03,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:39:03,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:39:03,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:05,327 INFO L124 PetriNetUnfolderBase]: 5393/8636 cut-off events. [2023-08-27 14:39:05,327 INFO L125 PetriNetUnfolderBase]: For 91519/91647 co-relation queries the response was YES. [2023-08-27 14:39:05,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50202 conditions, 8636 events. 5393/8636 cut-off events. For 91519/91647 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 54370 event pairs, 1607 based on Foata normal form. 266/7864 useless extension candidates. Maximal degree in co-relation 50120. Up to 6841 conditions per place. [2023-08-27 14:39:05,437 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 547 selfloop transitions, 85 changer transitions 0/634 dead transitions. [2023-08-27 14:39:05,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 634 transitions, 10772 flow [2023-08-27 14:39:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:39:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:39:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1316 transitions. [2023-08-27 14:39:05,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37375745526838966 [2023-08-27 14:39:05,439 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1316 transitions. [2023-08-27 14:39:05,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1316 transitions. [2023-08-27 14:39:05,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:39:05,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1316 transitions. [2023-08-27 14:39:05,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,442 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,442 INFO L175 Difference]: Start difference. First operand has 218 places, 564 transitions, 8784 flow. Second operand 7 states and 1316 transitions. [2023-08-27 14:39:05,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 634 transitions, 10772 flow [2023-08-27 14:39:05,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 634 transitions, 10600 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 14:39:05,891 INFO L231 Difference]: Finished difference. Result has 220 places, 570 transitions, 8941 flow [2023-08-27 14:39:05,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=8580, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8941, PETRI_PLACES=220, PETRI_TRANSITIONS=570} [2023-08-27 14:39:05,892 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 168 predicate places. [2023-08-27 14:39:05,892 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 570 transitions, 8941 flow [2023-08-27 14:39:05,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:39:05,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:39:05,898 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 14:39:06,095 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,SelfDestructingSolverStorable26 [2023-08-27 14:39:06,096 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:39:06,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:39:06,096 INFO L85 PathProgramCache]: Analyzing trace with hash -326782173, now seen corresponding path program 1 times [2023-08-27 14:39:06,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:39:06,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378133425] [2023-08-27 14:39:06,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:06,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:39:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:06,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:06,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:39:06,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378133425] [2023-08-27 14:39:06,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378133425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:06,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704827717] [2023-08-27 14:39:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:06,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:06,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:39:06,573 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 14:39:06,598 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 14:39:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:06,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 14:39:06,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:39:06,791 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 11 treesize of output 7 [2023-08-27 14:39:06,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:06,838 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 14:39:06,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:06,880 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 14:39:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:06,959 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 14:39:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:06,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:39:07,073 WARN L839 $PredicateComparison]: unable to prove that (forall ((~q2_back~0 Int) (v_ArrVal_1220 (Array Int Int))) (or (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1220) c_~q2~0.base) (+ c_~q2~0.offset (* ~q2_back~0 4))) 2147483648) (< ~q2_back~0 0) (<= c_~n2~0 ~q2_back~0))) is different from false [2023-08-27 14:39:07,255 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:07,256 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 14:39:07,268 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:07,268 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 309 treesize of output 293 [2023-08-27 14:39:07,279 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 65 treesize of output 59 [2023-08-27 14:39:07,286 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 130 treesize of output 106 [2023-08-27 14:39:07,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-08-27 14:39:07,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:07,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704827717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:39:07,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:39:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-27 14:39:07,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033229403] [2023-08-27 14:39:07,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:39:07,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 14:39:07,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:39:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 14:39:07,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=393, Unknown=5, NotChecked=40, Total=506 [2023-08-27 14:39:07,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 503 [2023-08-27 14:39:07,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 570 transitions, 8941 flow. Second operand has 23 states, 23 states have (on average 150.6086956521739) internal successors, (3464), 23 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:07,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:39:07,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 503 [2023-08-27 14:39:07,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:09,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:12,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:39:15,766 INFO L124 PetriNetUnfolderBase]: 11070/17752 cut-off events. [2023-08-27 14:39:15,766 INFO L125 PetriNetUnfolderBase]: For 181095/181283 co-relation queries the response was YES. [2023-08-27 14:39:15,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99162 conditions, 17752 events. 11070/17752 cut-off events. For 181095/181283 co-relation queries the response was YES. Maximal size of possible extension queue 981. Compared 126582 event pairs, 4694 based on Foata normal form. 290/15678 useless extension candidates. Maximal degree in co-relation 99078. Up to 7668 conditions per place. [2023-08-27 14:39:16,030 INFO L140 encePairwiseOnDemand]: 491/503 looper letters, 708 selfloop transitions, 210 changer transitions 0/920 dead transitions. [2023-08-27 14:39:16,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 920 transitions, 15748 flow [2023-08-27 14:39:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 14:39:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 14:39:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2216 transitions. [2023-08-27 14:39:16,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3146833285998296 [2023-08-27 14:39:16,034 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2216 transitions. [2023-08-27 14:39:16,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2216 transitions. [2023-08-27 14:39:16,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:39:16,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2216 transitions. [2023-08-27 14:39:16,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 158.28571428571428) internal successors, (2216), 14 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:16,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 503.0) internal successors, (7545), 15 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:16,043 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 503.0) internal successors, (7545), 15 states have internal predecessors, (7545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:16,044 INFO L175 Difference]: Start difference. First operand has 220 places, 570 transitions, 8941 flow. Second operand 14 states and 2216 transitions. [2023-08-27 14:39:16,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 920 transitions, 15748 flow [2023-08-27 14:39:17,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 920 transitions, 15587 flow, removed 33 selfloop flow, removed 3 redundant places. [2023-08-27 14:39:17,579 INFO L231 Difference]: Finished difference. Result has 235 places, 646 transitions, 10993 flow [2023-08-27 14:39:17,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=8864, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10993, PETRI_PLACES=235, PETRI_TRANSITIONS=646} [2023-08-27 14:39:17,580 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 183 predicate places. [2023-08-27 14:39:17,580 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 646 transitions, 10993 flow [2023-08-27 14:39:17,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 150.6086956521739) internal successors, (3464), 23 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:17,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:39:17,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:39:17,589 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 14:39:17,786 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,SelfDestructingSolverStorable27 [2023-08-27 14:39:17,786 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:39:17,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:39:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash 101255927, now seen corresponding path program 4 times [2023-08-27 14:39:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:39:17,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455355319] [2023-08-27 14:39:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:17,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:39:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:18,595 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 14:39:18,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:39:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455355319] [2023-08-27 14:39:18,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455355319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:18,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257136089] [2023-08-27 14:39:18,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:39:18,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:18,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:39:18,596 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 14:39:18,598 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 14:39:18,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:39:18,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:39:18,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 14:39:18,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:39:18,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:18,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:18,760 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 14:39:18,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 14:39:18,816 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 14:39:18,866 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 14:39:18,867 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 11 treesize of output 11 [2023-08-27 14:39:18,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:39:18,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:18,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:39:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:19,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:39:19,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:19,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:39:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:39:19,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:19,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2023-08-27 14:39:19,203 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 14:39:19,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:39:19,248 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1282 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1282) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 14:39:19,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:19,582 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 37 treesize of output 38 [2023-08-27 14:39:19,600 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:19,601 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 10819 treesize of output 10563 [2023-08-27 14:39:19,626 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 157 treesize of output 151 [2023-08-27 14:39:19,632 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 314 treesize of output 266 [2023-08-27 14:39:19,639 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 266 treesize of output 242 [2023-08-27 14:39:19,647 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 126 treesize of output 114 [2023-08-27 14:39:19,877 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 14:39:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257136089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:39:19,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:39:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 14:39:19,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048735618] [2023-08-27 14:39:19,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:39:19,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 14:39:19,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:39:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 14:39:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=792, Unknown=10, NotChecked=58, Total=992 [2023-08-27 14:39:19,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 503 [2023-08-27 14:39:19,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 646 transitions, 10993 flow. Second operand has 32 states, 32 states have (on average 146.21875) internal successors, (4679), 32 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:19,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:39:19,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 503 [2023-08-27 14:39:19,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:28,781 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:39:37,295 WARN L234 SmtUtils]: Spent 8.09s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:39:37,588 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (let ((.cse0 (<= c_~n1~0 c_~q1_back~0)) (.cse1 (< c_~q1_back~0 0)) (.cse3 (forall ((v_ArrVal_1282 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1282) c_~q1~0.base) .cse2)))))) (and (or .cse0 .cse1 (forall ((v_ArrVal_1282 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1282) c_~q1~0.base) .cse2))))) (or .cse0 .cse1 .cse3) .cse3))) is different from false [2023-08-27 14:39:42,516 INFO L124 PetriNetUnfolderBase]: 12663/20292 cut-off events. [2023-08-27 14:39:42,516 INFO L125 PetriNetUnfolderBase]: For 250844/251098 co-relation queries the response was YES. [2023-08-27 14:39:42,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120579 conditions, 20292 events. 12663/20292 cut-off events. For 250844/251098 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 148299 event pairs, 2984 based on Foata normal form. 357/18193 useless extension candidates. Maximal degree in co-relation 120490. Up to 10960 conditions per place. [2023-08-27 14:39:42,665 INFO L140 encePairwiseOnDemand]: 484/503 looper letters, 564 selfloop transitions, 338 changer transitions 0/904 dead transitions. [2023-08-27 14:39:42,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 904 transitions, 15836 flow [2023-08-27 14:39:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 14:39:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 14:39:42,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3652 transitions. [2023-08-27 14:39:42,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30251822398939693 [2023-08-27 14:39:42,669 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3652 transitions. [2023-08-27 14:39:42,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3652 transitions. [2023-08-27 14:39:42,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:39:42,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3652 transitions. [2023-08-27 14:39:42,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 152.16666666666666) internal successors, (3652), 24 states have internal predecessors, (3652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:42,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 503.0) internal successors, (12575), 25 states have internal predecessors, (12575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:42,682 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 503.0) internal successors, (12575), 25 states have internal predecessors, (12575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:42,682 INFO L175 Difference]: Start difference. First operand has 235 places, 646 transitions, 10993 flow. Second operand 24 states and 3652 transitions. [2023-08-27 14:39:42,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 904 transitions, 15836 flow [2023-08-27 14:39:44,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 904 transitions, 15722 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-27 14:39:44,953 INFO L231 Difference]: Finished difference. Result has 262 places, 766 transitions, 14435 flow [2023-08-27 14:39:44,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=10905, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=14435, PETRI_PLACES=262, PETRI_TRANSITIONS=766} [2023-08-27 14:39:44,954 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 210 predicate places. [2023-08-27 14:39:44,954 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 766 transitions, 14435 flow [2023-08-27 14:39:44,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 146.21875) internal successors, (4679), 32 states have internal predecessors, (4679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:44,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:39:44,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:39:44,960 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 14:39:45,160 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,SelfDestructingSolverStorable28 [2023-08-27 14:39:45,160 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:39:45,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:39:45,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1328927977, now seen corresponding path program 5 times [2023-08-27 14:39:45,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:39:45,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098634158] [2023-08-27 14:39:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:45,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:39:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:45,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:39:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098634158] [2023-08-27 14:39:45,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098634158] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593595934] [2023-08-27 14:39:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:39:45,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:45,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:39:45,685 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 14:39:45,713 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 14:39:45,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:39:45,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:39:45,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 14:39:45,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:39:45,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:45,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:45,888 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-27 14:39:45,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-27 14:39:45,938 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 14:39:46,006 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 14:39:46,006 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 11 treesize of output 11 [2023-08-27 14:39:46,065 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 14:39:46,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:46,116 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 14:39:46,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:46,235 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 14:39:46,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:39:46,290 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 14:39:46,379 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 14:39:46,379 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 25 treesize of output 12 [2023-08-27 14:39:46,405 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 14:39:46,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:39:46,483 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1344 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1344) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) 2147483649))) is different from false [2023-08-27 14:39:48,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:48,799 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2023-08-27 14:39:48,817 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:39:48,818 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 43267 treesize of output 42243 [2023-08-27 14:39:48,852 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 157 treesize of output 151 [2023-08-27 14:39:48,863 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 151 treesize of output 139 [2023-08-27 14:39:48,872 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 302 treesize of output 254 [2023-08-27 14:39:48,885 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 138 treesize of output 114 [2023-08-27 14:39:49,071 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 14:39:49,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593595934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:39:49,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:39:49,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 28 [2023-08-27 14:39:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636065036] [2023-08-27 14:39:49,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:39:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 14:39:49,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:39:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 14:39:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=706, Unknown=8, NotChecked=54, Total=870 [2023-08-27 14:39:49,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 503 [2023-08-27 14:39:49,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 766 transitions, 14435 flow. Second operand has 30 states, 30 states have (on average 146.3) internal successors, (4389), 30 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:49,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:39:49,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 503 [2023-08-27 14:39:49,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:54,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:13,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:19,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 14:40:30,437 WARN L234 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 113 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:40:36,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:47,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:40:59,135 INFO L124 PetriNetUnfolderBase]: 12058/19235 cut-off events. [2023-08-27 14:40:59,135 INFO L125 PetriNetUnfolderBase]: For 358031/358287 co-relation queries the response was YES. [2023-08-27 14:40:59,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135391 conditions, 19235 events. 12058/19235 cut-off events. For 358031/358287 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 138318 event pairs, 3352 based on Foata normal form. 534/17739 useless extension candidates. Maximal degree in co-relation 135291. Up to 8939 conditions per place. [2023-08-27 14:40:59,319 INFO L140 encePairwiseOnDemand]: 488/503 looper letters, 639 selfloop transitions, 436 changer transitions 1/1078 dead transitions. [2023-08-27 14:40:59,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 1078 transitions, 19877 flow [2023-08-27 14:40:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 14:40:59,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 14:40:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5650 transitions. [2023-08-27 14:40:59,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30358390199344476 [2023-08-27 14:40:59,325 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5650 transitions. [2023-08-27 14:40:59,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5650 transitions. [2023-08-27 14:40:59,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:40:59,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5650 transitions. [2023-08-27 14:40:59,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 152.7027027027027) internal successors, (5650), 37 states have internal predecessors, (5650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:59,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 503.0) internal successors, (19114), 38 states have internal predecessors, (19114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:59,345 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 503.0) internal successors, (19114), 38 states have internal predecessors, (19114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:59,345 INFO L175 Difference]: Start difference. First operand has 262 places, 766 transitions, 14435 flow. Second operand 37 states and 5650 transitions. [2023-08-27 14:40:59,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 1078 transitions, 19877 flow [2023-08-27 14:41:02,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1078 transitions, 19627 flow, removed 99 selfloop flow, removed 9 redundant places. [2023-08-27 14:41:02,834 INFO L231 Difference]: Finished difference. Result has 297 places, 854 transitions, 17246 flow [2023-08-27 14:41:02,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=13868, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=17246, PETRI_PLACES=297, PETRI_TRANSITIONS=854} [2023-08-27 14:41:02,835 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 245 predicate places. [2023-08-27 14:41:02,835 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 854 transitions, 17246 flow [2023-08-27 14:41:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 146.3) internal successors, (4389), 30 states have internal predecessors, (4389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:02,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:02,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:41:02,844 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 14:41:03,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:03,041 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:41:03,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:03,042 INFO L85 PathProgramCache]: Analyzing trace with hash -272321439, now seen corresponding path program 3 times [2023-08-27 14:41:03,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:03,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025764222] [2023-08-27 14:41:03,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:03,923 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 14:41:03,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:03,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025764222] [2023-08-27 14:41:03,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025764222] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:03,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408455672] [2023-08-27 14:41:03,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:41:03,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:03,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:03,929 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 14:41:03,932 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 14:41:04,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:41:04,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:41:04,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 14:41:04,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:41:04,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:41:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408455672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:41:04,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:41:04,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-08-27 14:41:04,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724087273] [2023-08-27 14:41:04,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:41:04,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:41:04,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:04,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:41:04,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:41:04,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 503 [2023-08-27 14:41:04,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 854 transitions, 17246 flow. Second operand has 6 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:04,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:04,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 503 [2023-08-27 14:41:04,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:09,054 INFO L124 PetriNetUnfolderBase]: 11774/18757 cut-off events. [2023-08-27 14:41:09,055 INFO L125 PetriNetUnfolderBase]: For 389040/389298 co-relation queries the response was YES. [2023-08-27 14:41:09,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137800 conditions, 18757 events. 11774/18757 cut-off events. For 389040/389298 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 133567 event pairs, 3901 based on Foata normal form. 508/17335 useless extension candidates. Maximal degree in co-relation 137693. Up to 14973 conditions per place. [2023-08-27 14:41:09,299 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 764 selfloop transitions, 134 changer transitions 0/900 dead transitions. [2023-08-27 14:41:09,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 900 transitions, 19611 flow [2023-08-27 14:41:09,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 14:41:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 14:41:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1002 transitions. [2023-08-27 14:41:09,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984095427435388 [2023-08-27 14:41:09,301 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1002 transitions. [2023-08-27 14:41:09,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1002 transitions. [2023-08-27 14:41:09,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:09,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1002 transitions. [2023-08-27 14:41:09,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 200.4) internal successors, (1002), 5 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:09,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:09,304 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 503.0) internal successors, (3018), 6 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:09,304 INFO L175 Difference]: Start difference. First operand has 297 places, 854 transitions, 17246 flow. Second operand 5 states and 1002 transitions. [2023-08-27 14:41:09,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 900 transitions, 19611 flow [2023-08-27 14:41:13,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 900 transitions, 19028 flow, removed 225 selfloop flow, removed 10 redundant places. [2023-08-27 14:41:13,796 INFO L231 Difference]: Finished difference. Result has 291 places, 849 transitions, 16886 flow [2023-08-27 14:41:13,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=16534, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=847, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=16886, PETRI_PLACES=291, PETRI_TRANSITIONS=849} [2023-08-27 14:41:13,796 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 239 predicate places. [2023-08-27 14:41:13,797 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 849 transitions, 16886 flow [2023-08-27 14:41:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.16666666666666) internal successors, (1135), 6 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:13,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:13,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:41:13,801 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 14:41:14,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:14,001 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:41:14,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:14,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1888336255, now seen corresponding path program 4 times [2023-08-27 14:41:14,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:14,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731248993] [2023-08-27 14:41:14,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:14,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:14,745 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 14:41:14,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:14,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731248993] [2023-08-27 14:41:14,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731248993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:14,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719593185] [2023-08-27 14:41:14,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:41:14,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:14,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:14,747 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 14:41:14,748 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 14:41:14,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:41:14,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:41:14,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 14:41:14,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:15,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:41:15,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:41:15,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:41:15,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:41:15,427 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 48 treesize of output 40 [2023-08-27 14:41:15,444 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 12 treesize of output 6 [2023-08-27 14:41:15,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:41:15,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719593185] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:15,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:41:15,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-08-27 14:41:15,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852919389] [2023-08-27 14:41:15,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:41:15,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:41:15,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:41:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=441, Unknown=4, NotChecked=0, Total=506 [2023-08-27 14:41:15,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:41:15,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 849 transitions, 16886 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:15,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:15,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:41:15,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:21,379 INFO L124 PetriNetUnfolderBase]: 12042/19109 cut-off events. [2023-08-27 14:41:21,379 INFO L125 PetriNetUnfolderBase]: For 403287/403545 co-relation queries the response was YES. [2023-08-27 14:41:21,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142224 conditions, 19109 events. 12042/19109 cut-off events. For 403287/403545 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 135544 event pairs, 2515 based on Foata normal form. 302/17481 useless extension candidates. Maximal degree in co-relation 142115. Up to 11401 conditions per place. [2023-08-27 14:41:21,574 INFO L140 encePairwiseOnDemand]: 491/503 looper letters, 709 selfloop transitions, 209 changer transitions 0/920 dead transitions. [2023-08-27 14:41:21,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 920 transitions, 19775 flow [2023-08-27 14:41:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:41:21,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:41:21,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1315 transitions. [2023-08-27 14:41:21,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734734450440216 [2023-08-27 14:41:21,577 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1315 transitions. [2023-08-27 14:41:21,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1315 transitions. [2023-08-27 14:41:21,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:21,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1315 transitions. [2023-08-27 14:41:21,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.85714285714286) internal successors, (1315), 7 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:21,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:21,581 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:21,581 INFO L175 Difference]: Start difference. First operand has 291 places, 849 transitions, 16886 flow. Second operand 7 states and 1315 transitions. [2023-08-27 14:41:21,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 920 transitions, 19775 flow [2023-08-27 14:41:25,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 920 transitions, 19540 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 14:41:25,400 INFO L231 Difference]: Finished difference. Result has 296 places, 864 transitions, 17729 flow [2023-08-27 14:41:25,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=16651, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17729, PETRI_PLACES=296, PETRI_TRANSITIONS=864} [2023-08-27 14:41:25,401 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 244 predicate places. [2023-08-27 14:41:25,401 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 864 transitions, 17729 flow [2023-08-27 14:41:25,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:25,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:25,402 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:41:25,408 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 14:41:25,602 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,SelfDestructingSolverStorable31 [2023-08-27 14:41:25,603 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:41:25,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:25,603 INFO L85 PathProgramCache]: Analyzing trace with hash 555923727, now seen corresponding path program 6 times [2023-08-27 14:41:25,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:25,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071802254] [2023-08-27 14:41:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:25,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:41:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:26,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071802254] [2023-08-27 14:41:26,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071802254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:26,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910895718] [2023-08-27 14:41:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:41:26,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:26,425 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 14:41:26,429 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 14:41:26,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-27 14:41:26,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:41:26,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:41:26,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:26,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:26,723 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:41:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 14:41:26,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:41:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910895718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:41:26,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:41:26,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 14:41:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225076644] [2023-08-27 14:41:26,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:41:26,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:41:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:41:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:41:26,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:41:26,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 864 transitions, 17729 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:26,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:26,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:41:26,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:32,234 INFO L124 PetriNetUnfolderBase]: 12164/19376 cut-off events. [2023-08-27 14:41:32,234 INFO L125 PetriNetUnfolderBase]: For 446080/446338 co-relation queries the response was YES. [2023-08-27 14:41:32,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147016 conditions, 19376 events. 12164/19376 cut-off events. For 446080/446338 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 138190 event pairs, 4820 based on Foata normal form. 273/17641 useless extension candidates. Maximal degree in co-relation 146905. Up to 17126 conditions per place. [2023-08-27 14:41:32,416 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 745 selfloop transitions, 159 changer transitions 0/906 dead transitions. [2023-08-27 14:41:32,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 906 transitions, 19958 flow [2023-08-27 14:41:32,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:41:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:41:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1313 transitions. [2023-08-27 14:41:32,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3729054245952854 [2023-08-27 14:41:32,418 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1313 transitions. [2023-08-27 14:41:32,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1313 transitions. [2023-08-27 14:41:32,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:32,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1313 transitions. [2023-08-27 14:41:32,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.57142857142858) internal successors, (1313), 7 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:32,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:32,422 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:32,422 INFO L175 Difference]: Start difference. First operand has 296 places, 864 transitions, 17729 flow. Second operand 7 states and 1313 transitions. [2023-08-27 14:41:32,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 906 transitions, 19958 flow [2023-08-27 14:41:36,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 906 transitions, 19809 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-27 14:41:36,654 INFO L231 Difference]: Finished difference. Result has 300 places, 864 transitions, 17907 flow [2023-08-27 14:41:36,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=17554, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17907, PETRI_PLACES=300, PETRI_TRANSITIONS=864} [2023-08-27 14:41:36,655 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 248 predicate places. [2023-08-27 14:41:36,655 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 864 transitions, 17907 flow [2023-08-27 14:41:36,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:36,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:36,656 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:41:36,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-27 14:41:36,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-27 14:41:36,861 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:41:36,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:36,862 INFO L85 PathProgramCache]: Analyzing trace with hash -738934559, now seen corresponding path program 5 times [2023-08-27 14:41:36,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:36,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383313996] [2023-08-27 14:41:36,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:36,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:36,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:37,581 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 14:41:37,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383313996] [2023-08-27 14:41:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383313996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640986527] [2023-08-27 14:41:37,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:41:37,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:37,583 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 14:41:37,585 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 14:41:37,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:41:37,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:41:37,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 14:41:37,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:37,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:37,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:41:38,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:38,105 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:41:38,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:41:38,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:41:38,346 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1576 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1576) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 14:41:38,357 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1576 (Array Int Int)) (v_ArrVal_1575 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1575) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1576) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 14:41:38,376 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:41:38,376 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 174 treesize of output 158 [2023-08-27 14:41:38,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-27 14:41:38,390 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 14:41:38,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:41:38,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640986527] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:38,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:41:38,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 23 [2023-08-27 14:41:38,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887465178] [2023-08-27 14:41:38,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:41:38,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:41:38,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:38,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:41:38,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=446, Unknown=5, NotChecked=86, Total=600 [2023-08-27 14:41:38,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 14:41:38,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 864 transitions, 17907 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:38,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:38,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 14:41:38,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:44,557 INFO L124 PetriNetUnfolderBase]: 13071/20647 cut-off events. [2023-08-27 14:41:44,557 INFO L125 PetriNetUnfolderBase]: For 511557/511815 co-relation queries the response was YES. [2023-08-27 14:41:44,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160821 conditions, 20647 events. 13071/20647 cut-off events. For 511557/511815 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 146950 event pairs, 2841 based on Foata normal form. 346/18991 useless extension candidates. Maximal degree in co-relation 160708. Up to 13721 conditions per place. [2023-08-27 14:41:44,743 INFO L140 encePairwiseOnDemand]: 487/503 looper letters, 759 selfloop transitions, 255 changer transitions 0/1016 dead transitions. [2023-08-27 14:41:44,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 1016 transitions, 23036 flow [2023-08-27 14:41:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:41:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:41:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1826 transitions. [2023-08-27 14:41:44,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3630218687872763 [2023-08-27 14:41:44,745 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1826 transitions. [2023-08-27 14:41:44,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1826 transitions. [2023-08-27 14:41:44,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:44,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1826 transitions. [2023-08-27 14:41:44,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 182.6) internal successors, (1826), 10 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:44,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 503.0) internal successors, (5533), 11 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:44,750 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 503.0) internal successors, (5533), 11 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:44,750 INFO L175 Difference]: Start difference. First operand has 300 places, 864 transitions, 17907 flow. Second operand 10 states and 1826 transitions. [2023-08-27 14:41:44,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 1016 transitions, 23036 flow [2023-08-27 14:41:48,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1016 transitions, 22725 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-27 14:41:48,944 INFO L231 Difference]: Finished difference. Result has 312 places, 974 transitions, 21335 flow [2023-08-27 14:41:48,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=17624, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=21335, PETRI_PLACES=312, PETRI_TRANSITIONS=974} [2023-08-27 14:41:48,945 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 260 predicate places. [2023-08-27 14:41:48,945 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 974 transitions, 21335 flow [2023-08-27 14:41:48,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:48,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:48,945 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:41:48,950 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 14:41:49,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:49,146 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:41:49,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:49,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1943737485, now seen corresponding path program 7 times [2023-08-27 14:41:49,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:49,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179655914] [2023-08-27 14:41:49,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:49,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:49,891 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 14:41:49,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179655914] [2023-08-27 14:41:49,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179655914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:49,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178249848] [2023-08-27 14:41:49,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 14:41:49,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:41:49,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:41:49,893 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 14:41:49,923 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 14:41:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:50,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 14:41:50,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:41:50,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:50,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:41:50,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:41:50,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:41:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:41:50,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:41:50,786 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1634 (Array Int Int)) (v_ArrVal_1633 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1633) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1634) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))))) is different from false [2023-08-27 14:41:50,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:41:50,802 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 174 treesize of output 158 [2023-08-27 14:41:50,809 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 14:41:50,834 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 14:41:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:41:50,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178249848] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:41:50,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:41:50,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 23 [2023-08-27 14:41:50,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429407653] [2023-08-27 14:41:50,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:41:50,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:41:50,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:50,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:41:50,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=481, Unknown=8, NotChecked=44, Total=600 [2023-08-27 14:41:50,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 14:41:50,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 974 transitions, 21335 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:50,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:50,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 14:41:50,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:51,132 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_1634 (Array Int Int)) (v_ArrVal_1633 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1633) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1634) c_~q1~0.base) .cse0)))) (forall ((v_ArrVal_1634 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1634) c_~q1~0.base) .cse0)))))) is different from false [2023-08-27 14:41:51,300 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_1634 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1634) c_~q1~0.base) .cse0)))) (forall ((v_ArrVal_1634 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1634) c_~q1~0.base) .cse0)))))) is different from false [2023-08-27 14:41:58,023 INFO L124 PetriNetUnfolderBase]: 14045/22153 cut-off events. [2023-08-27 14:41:58,024 INFO L125 PetriNetUnfolderBase]: For 645250/645508 co-relation queries the response was YES. [2023-08-27 14:41:58,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188471 conditions, 22153 events. 14045/22153 cut-off events. For 645250/645508 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 159074 event pairs, 3132 based on Foata normal form. 272/20423 useless extension candidates. Maximal degree in co-relation 188352. Up to 13074 conditions per place. [2023-08-27 14:41:58,260 INFO L140 encePairwiseOnDemand]: 485/503 looper letters, 663 selfloop transitions, 436 changer transitions 0/1101 dead transitions. [2023-08-27 14:41:58,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 1101 transitions, 25769 flow [2023-08-27 14:41:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:41:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:41:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1839 transitions. [2023-08-27 14:41:58,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36560636182902584 [2023-08-27 14:41:58,262 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1839 transitions. [2023-08-27 14:41:58,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1839 transitions. [2023-08-27 14:41:58,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:58,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1839 transitions. [2023-08-27 14:41:58,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 183.9) internal successors, (1839), 10 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:58,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 503.0) internal successors, (5533), 11 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:58,268 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 503.0) internal successors, (5533), 11 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:58,268 INFO L175 Difference]: Start difference. First operand has 312 places, 974 transitions, 21335 flow. Second operand 10 states and 1839 transitions. [2023-08-27 14:41:58,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 1101 transitions, 25769 flow [2023-08-27 14:42:05,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1101 transitions, 25478 flow, removed 117 selfloop flow, removed 2 redundant places. [2023-08-27 14:42:05,239 INFO L231 Difference]: Finished difference. Result has 325 places, 1041 transitions, 24254 flow [2023-08-27 14:42:05,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=21044, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=24254, PETRI_PLACES=325, PETRI_TRANSITIONS=1041} [2023-08-27 14:42:05,240 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 273 predicate places. [2023-08-27 14:42:05,240 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 1041 transitions, 24254 flow [2023-08-27 14:42:05,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:05,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:42:05,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:42:05,246 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 14:42:05,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:05,445 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:42:05,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:42:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1077487019, now seen corresponding path program 2 times [2023-08-27 14:42:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:42:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067915858] [2023-08-27 14:42:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:05,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:42:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:05,935 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 14:42:05,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:42:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067915858] [2023-08-27 14:42:05,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067915858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:42:05,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554838862] [2023-08-27 14:42:05,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:42:05,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:05,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:42:05,936 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 14:42:05,938 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 14:42:06,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:42:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:42:06,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:42:06,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:42:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:06,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:42:06,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:42:06,363 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:42:06,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554838862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:42:06,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:42:06,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 14:42:06,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823293971] [2023-08-27 14:42:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:42:06,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:42:06,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:42:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:42:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:42:06,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:42:06,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 1041 transitions, 24254 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:06,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:42:06,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:42:06,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:42:13,459 INFO L124 PetriNetUnfolderBase]: 13914/21968 cut-off events. [2023-08-27 14:42:13,460 INFO L125 PetriNetUnfolderBase]: For 760514/760772 co-relation queries the response was YES. [2023-08-27 14:42:13,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202328 conditions, 21968 events. 13914/21968 cut-off events. For 760514/760772 co-relation queries the response was YES. Maximal size of possible extension queue 1108. Compared 157632 event pairs, 3994 based on Foata normal form. 302/20298 useless extension candidates. Maximal degree in co-relation 202202. Up to 17975 conditions per place. [2023-08-27 14:42:13,834 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 901 selfloop transitions, 201 changer transitions 0/1104 dead transitions. [2023-08-27 14:42:13,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 1104 transitions, 27521 flow [2023-08-27 14:42:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:42:13,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:42:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1309 transitions. [2023-08-27 14:42:13,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717693836978131 [2023-08-27 14:42:13,836 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1309 transitions. [2023-08-27 14:42:13,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1309 transitions. [2023-08-27 14:42:13,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:42:13,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1309 transitions. [2023-08-27 14:42:13,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 187.0) internal successors, (1309), 7 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:13,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:13,839 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:13,839 INFO L175 Difference]: Start difference. First operand has 325 places, 1041 transitions, 24254 flow. Second operand 7 states and 1309 transitions. [2023-08-27 14:42:13,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 1104 transitions, 27521 flow [2023-08-27 14:42:22,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1104 transitions, 27278 flow, removed 55 selfloop flow, removed 3 redundant places. [2023-08-27 14:42:22,631 INFO L231 Difference]: Finished difference. Result has 329 places, 1051 transitions, 24781 flow [2023-08-27 14:42:22,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=23969, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=839, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24781, PETRI_PLACES=329, PETRI_TRANSITIONS=1051} [2023-08-27 14:42:22,632 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 277 predicate places. [2023-08-27 14:42:22,632 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1051 transitions, 24781 flow [2023-08-27 14:42:22,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:22,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:42:22,632 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:42:22,637 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 14:42:22,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:22,833 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:42:22,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:42:22,833 INFO L85 PathProgramCache]: Analyzing trace with hash -877539755, now seen corresponding path program 3 times [2023-08-27 14:42:22,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:42:22,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806233441] [2023-08-27 14:42:22,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:22,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:42:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:42:24,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:42:24,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806233441] [2023-08-27 14:42:24,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806233441] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:42:24,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356679479] [2023-08-27 14:42:24,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:42:24,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:24,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:42:24,291 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 14:42:24,293 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 14:42:24,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:42:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:42:24,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 14:42:24,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:42:24,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:24,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:42:24,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:24,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:42:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:42:24,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:42:24,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356679479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:42:24,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:42:24,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-27 14:42:24,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698824337] [2023-08-27 14:42:24,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:42:24,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:42:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:42:24,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:42:24,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-08-27 14:42:24,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 14:42:24,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1051 transitions, 24781 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:24,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:42:24,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 14:42:24,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:42:32,966 INFO L124 PetriNetUnfolderBase]: 14418/22819 cut-off events. [2023-08-27 14:42:32,967 INFO L125 PetriNetUnfolderBase]: For 786150/786413 co-relation queries the response was YES. [2023-08-27 14:42:33,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209905 conditions, 22819 events. 14418/22819 cut-off events. For 786150/786413 co-relation queries the response was YES. Maximal size of possible extension queue 1174. Compared 165504 event pairs, 3506 based on Foata normal form. 328/21042 useless extension candidates. Maximal degree in co-relation 209777. Up to 14047 conditions per place. [2023-08-27 14:42:33,247 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 798 selfloop transitions, 324 changer transitions 0/1124 dead transitions. [2023-08-27 14:42:33,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1124 transitions, 28182 flow [2023-08-27 14:42:33,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:42:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:42:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1298 transitions. [2023-08-27 14:42:33,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36864527122976426 [2023-08-27 14:42:33,249 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1298 transitions. [2023-08-27 14:42:33,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1298 transitions. [2023-08-27 14:42:33,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:42:33,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1298 transitions. [2023-08-27 14:42:33,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 185.42857142857142) internal successors, (1298), 7 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:33,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:33,253 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:33,253 INFO L175 Difference]: Start difference. First operand has 329 places, 1051 transitions, 24781 flow. Second operand 7 states and 1298 transitions. [2023-08-27 14:42:33,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1124 transitions, 28182 flow [2023-08-27 14:42:43,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 1124 transitions, 27799 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-27 14:42:43,534 INFO L231 Difference]: Finished difference. Result has 333 places, 1058 transitions, 25642 flow [2023-08-27 14:42:43,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=24220, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25642, PETRI_PLACES=333, PETRI_TRANSITIONS=1058} [2023-08-27 14:42:43,535 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 281 predicate places. [2023-08-27 14:42:43,535 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 1058 transitions, 25642 flow [2023-08-27 14:42:43,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:43,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:42:43,535 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:42:43,540 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 14:42:43,735 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,SelfDestructingSolverStorable36 [2023-08-27 14:42:43,736 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:42:43,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:42:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1543146884, now seen corresponding path program 1 times [2023-08-27 14:42:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:42:43,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31686108] [2023-08-27 14:42:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:42:43,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:43,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:42:43,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:42:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31686108] [2023-08-27 14:42:43,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31686108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:42:43,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864195682] [2023-08-27 14:42:43,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:43,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:43,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:42:43,881 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 14:42:43,907 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 14:42:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:44,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:42:44,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:42:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:42:44,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:42:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:42:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864195682] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:42:44,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:42:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 14:42:44,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854453287] [2023-08-27 14:42:44,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:42:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 14:42:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:42:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 14:42:44,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-27 14:42:44,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 503 [2023-08-27 14:42:44,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 1058 transitions, 25642 flow. Second operand has 12 states, 12 states have (on average 186.16666666666666) internal successors, (2234), 12 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:44,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:42:44,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 503 [2023-08-27 14:42:44,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:42:51,533 INFO L124 PetriNetUnfolderBase]: 13407/21307 cut-off events. [2023-08-27 14:42:51,534 INFO L125 PetriNetUnfolderBase]: For 787704/787967 co-relation queries the response was YES. [2023-08-27 14:42:51,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201251 conditions, 21307 events. 13407/21307 cut-off events. For 787704/787967 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 153690 event pairs, 4521 based on Foata normal form. 734/20206 useless extension candidates. Maximal degree in co-relation 201120. Up to 13156 conditions per place. [2023-08-27 14:42:51,790 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 1129 selfloop transitions, 118 changer transitions 0/1249 dead transitions. [2023-08-27 14:42:51,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 1249 transitions, 31821 flow [2023-08-27 14:42:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:42:51,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:42:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1174 transitions. [2023-08-27 14:42:51,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3889993373094765 [2023-08-27 14:42:51,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1174 transitions. [2023-08-27 14:42:51,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1174 transitions. [2023-08-27 14:42:51,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:42:51,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1174 transitions. [2023-08-27 14:42:51,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 195.66666666666666) internal successors, (1174), 6 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:51,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:51,796 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:51,796 INFO L175 Difference]: Start difference. First operand has 333 places, 1058 transitions, 25642 flow. Second operand 6 states and 1174 transitions. [2023-08-27 14:42:51,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 1249 transitions, 31821 flow [2023-08-27 14:43:01,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1249 transitions, 31556 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-27 14:43:01,046 INFO L231 Difference]: Finished difference. Result has 336 places, 1072 transitions, 26406 flow [2023-08-27 14:43:01,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=24838, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=924, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=26406, PETRI_PLACES=336, PETRI_TRANSITIONS=1072} [2023-08-27 14:43:01,047 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 284 predicate places. [2023-08-27 14:43:01,047 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1072 transitions, 26406 flow [2023-08-27 14:43:01,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 186.16666666666666) internal successors, (2234), 12 states have internal predecessors, (2234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:01,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:43:01,047 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:43:01,051 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 14:43:01,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 14:43:01,248 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:43:01,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:43:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 870795884, now seen corresponding path program 1 times [2023-08-27 14:43:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:43:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825162379] [2023-08-27 14:43:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:43:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:43:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:43:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:43:01,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:43:01,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825162379] [2023-08-27 14:43:01,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825162379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:43:01,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:43:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 14:43:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027871853] [2023-08-27 14:43:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:43:01,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:43:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:43:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:43:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:43:01,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 503 [2023-08-27 14:43:01,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1072 transitions, 26406 flow. Second operand has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:01,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:43:01,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 503 [2023-08-27 14:43:01,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:43:09,599 INFO L124 PetriNetUnfolderBase]: 15528/24692 cut-off events. [2023-08-27 14:43:09,599 INFO L125 PetriNetUnfolderBase]: For 989761/990019 co-relation queries the response was YES. [2023-08-27 14:43:09,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235158 conditions, 24692 events. 15528/24692 cut-off events. For 989761/990019 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 182916 event pairs, 3797 based on Foata normal form. 781/23249 useless extension candidates. Maximal degree in co-relation 235026. Up to 12477 conditions per place. [2023-08-27 14:43:09,917 INFO L140 encePairwiseOnDemand]: 499/503 looper letters, 1114 selfloop transitions, 164 changer transitions 0/1280 dead transitions. [2023-08-27 14:43:09,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1280 transitions, 34694 flow [2023-08-27 14:43:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:43:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:43:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 914 transitions. [2023-08-27 14:43:09,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542743538767396 [2023-08-27 14:43:09,918 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 914 transitions. [2023-08-27 14:43:09,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 914 transitions. [2023-08-27 14:43:09,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:43:09,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 914 transitions. [2023-08-27 14:43:09,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 228.5) internal successors, (914), 4 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:09,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:09,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:09,921 INFO L175 Difference]: Start difference. First operand has 336 places, 1072 transitions, 26406 flow. Second operand 4 states and 914 transitions. [2023-08-27 14:43:09,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1280 transitions, 34694 flow [2023-08-27 14:43:19,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1280 transitions, 34470 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-08-27 14:43:19,394 INFO L231 Difference]: Finished difference. Result has 329 places, 1065 transitions, 26981 flow [2023-08-27 14:43:19,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=25376, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1032, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=872, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=26981, PETRI_PLACES=329, PETRI_TRANSITIONS=1065} [2023-08-27 14:43:19,395 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 277 predicate places. [2023-08-27 14:43:19,395 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1065 transitions, 26981 flow [2023-08-27 14:43:19,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:19,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:43:19,395 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:43:19,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-27 14:43:19,396 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:43:19,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:43:19,396 INFO L85 PathProgramCache]: Analyzing trace with hash 600321255, now seen corresponding path program 2 times [2023-08-27 14:43:19,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:43:19,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451511049] [2023-08-27 14:43:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:43:19,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:43:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:43:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:43:20,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:43:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451511049] [2023-08-27 14:43:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451511049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:43:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537280689] [2023-08-27 14:43:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:43:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:43:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:43:20,493 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 14:43:20,498 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 14:43:20,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:43:20,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:43:20,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 14:43:20,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:43:20,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:43:20,914 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:43:20,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:43:20,972 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 18 treesize of output 20 [2023-08-27 14:43:21,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 14:43:21,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:43:21,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537280689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:43:21,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:43:21,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2023-08-27 14:43:21,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83981500] [2023-08-27 14:43:21,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:43:21,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:43:21,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:43:21,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:43:21,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:43:21,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 14:43:21,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1065 transitions, 26981 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:21,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:43:21,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 14:43:21,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:43:29,774 INFO L124 PetriNetUnfolderBase]: 15703/25068 cut-off events. [2023-08-27 14:43:29,774 INFO L125 PetriNetUnfolderBase]: For 1048687/1048945 co-relation queries the response was YES. [2023-08-27 14:43:29,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248148 conditions, 25068 events. 15703/25068 cut-off events. For 1048687/1048945 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 186125 event pairs, 4824 based on Foata normal form. 272/23014 useless extension candidates. Maximal degree in co-relation 248016. Up to 20478 conditions per place. [2023-08-27 14:43:30,110 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 981 selfloop transitions, 134 changer transitions 0/1117 dead transitions. [2023-08-27 14:43:30,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1117 transitions, 30073 flow [2023-08-27 14:43:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:43:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:43:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1292 transitions. [2023-08-27 14:43:30,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36694120988355583 [2023-08-27 14:43:30,112 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1292 transitions. [2023-08-27 14:43:30,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1292 transitions. [2023-08-27 14:43:30,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:43:30,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1292 transitions. [2023-08-27 14:43:30,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.57142857142858) internal successors, (1292), 7 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:30,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:30,114 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:30,114 INFO L175 Difference]: Start difference. First operand has 329 places, 1065 transitions, 26981 flow. Second operand 7 states and 1292 transitions. [2023-08-27 14:43:30,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1117 transitions, 30073 flow [2023-08-27 14:43:41,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1117 transitions, 29980 flow, removed 39 selfloop flow, removed 1 redundant places. [2023-08-27 14:43:41,720 INFO L231 Difference]: Finished difference. Result has 337 places, 1066 transitions, 27333 flow [2023-08-27 14:43:41,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=26790, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27333, PETRI_PLACES=337, PETRI_TRANSITIONS=1066} [2023-08-27 14:43:41,721 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 285 predicate places. [2023-08-27 14:43:41,721 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 1066 transitions, 27333 flow [2023-08-27 14:43:41,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:41,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:43:41,722 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:43:41,726 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 14:43:41,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 14:43:41,922 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:43:41,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:43:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1988908791, now seen corresponding path program 8 times [2023-08-27 14:43:41,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:43:41,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762957366] [2023-08-27 14:43:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:43:41,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:43:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:43:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:43:42,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:43:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762957366] [2023-08-27 14:43:42,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762957366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:43:42,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700480600] [2023-08-27 14:43:42,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:43:42,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:43:42,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:43:42,670 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 14:43:42,672 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 14:43:42,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:43:42,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:43:42,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 14:43:42,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:43:43,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:43:43,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:43:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 14:43:43,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:43:43,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700480600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:43:43,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:43:43,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-08-27 14:43:43,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488805996] [2023-08-27 14:43:43,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:43:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:43:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:43:43,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:43:43,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:43:43,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:43:43,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 1066 transitions, 27333 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:43,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:43:43,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:43:43,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:43:51,771 INFO L124 PetriNetUnfolderBase]: 15701/25099 cut-off events. [2023-08-27 14:43:51,771 INFO L125 PetriNetUnfolderBase]: For 1012921/1013179 co-relation queries the response was YES. [2023-08-27 14:43:52,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244184 conditions, 25099 events. 15701/25099 cut-off events. For 1012921/1013179 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 186189 event pairs, 5422 based on Foata normal form. 272/23027 useless extension candidates. Maximal degree in co-relation 244048. Up to 20419 conditions per place. [2023-08-27 14:43:52,131 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 1036 selfloop transitions, 85 changer transitions 0/1123 dead transitions. [2023-08-27 14:43:52,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1123 transitions, 30751 flow [2023-08-27 14:43:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:43:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:43:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1129 transitions. [2023-08-27 14:43:52,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3740888005301524 [2023-08-27 14:43:52,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1129 transitions. [2023-08-27 14:43:52,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1129 transitions. [2023-08-27 14:43:52,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:43:52,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1129 transitions. [2023-08-27 14:43:52,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.16666666666666) internal successors, (1129), 6 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:52,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:52,137 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:43:52,137 INFO L175 Difference]: Start difference. First operand has 337 places, 1066 transitions, 27333 flow. Second operand 6 states and 1129 transitions. [2023-08-27 14:43:52,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1123 transitions, 30751 flow [2023-08-27 14:44:02,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1123 transitions, 30630 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-27 14:44:02,618 INFO L231 Difference]: Finished difference. Result has 340 places, 1066 transitions, 27415 flow [2023-08-27 14:44:02,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=27212, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1066, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=27415, PETRI_PLACES=340, PETRI_TRANSITIONS=1066} [2023-08-27 14:44:02,619 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 288 predicate places. [2023-08-27 14:44:02,619 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1066 transitions, 27415 flow [2023-08-27 14:44:02,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:02,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:44:02,620 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:44:02,625 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 14:44:02,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-27 14:44:02,820 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:44:02,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:44:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1763527813, now seen corresponding path program 6 times [2023-08-27 14:44:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:44:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996371537] [2023-08-27 14:44:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:44:02,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:44:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:44:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:44:03,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:44:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996371537] [2023-08-27 14:44:03,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996371537] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:44:03,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504564621] [2023-08-27 14:44:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:44:03,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:03,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:44:03,494 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:44:03,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 14:44:03,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-27 14:44:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:44:03,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 14:44:03,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:44:03,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:44:03,884 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:44:03,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:44:03,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:44:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 14:44:04,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:44:04,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504564621] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:44:04,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:44:04,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-27 14:44:04,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300144128] [2023-08-27 14:44:04,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:44:04,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:44:04,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:44:04,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:44:04,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:44:04,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 14:44:04,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1066 transitions, 27415 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:04,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:44:04,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 14:44:04,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:44:11,970 INFO L124 PetriNetUnfolderBase]: 13682/22169 cut-off events. [2023-08-27 14:44:11,971 INFO L125 PetriNetUnfolderBase]: For 1002011/1002269 co-relation queries the response was YES. [2023-08-27 14:44:12,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211782 conditions, 22169 events. 13682/22169 cut-off events. For 1002011/1002269 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 166028 event pairs, 3144 based on Foata normal form. 1203/21520 useless extension candidates. Maximal degree in co-relation 211645. Up to 12247 conditions per place. [2023-08-27 14:44:12,396 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 855 selfloop transitions, 248 changer transitions 0/1105 dead transitions. [2023-08-27 14:44:12,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1105 transitions, 29780 flow [2023-08-27 14:44:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:44:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:44:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1294 transitions. [2023-08-27 14:44:12,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36750923033229194 [2023-08-27 14:44:12,397 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1294 transitions. [2023-08-27 14:44:12,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1294 transitions. [2023-08-27 14:44:12,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:44:12,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1294 transitions. [2023-08-27 14:44:12,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.85714285714286) internal successors, (1294), 7 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:12,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:12,400 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:12,400 INFO L175 Difference]: Start difference. First operand has 340 places, 1066 transitions, 27415 flow. Second operand 7 states and 1294 transitions. [2023-08-27 14:44:12,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1105 transitions, 29780 flow [2023-08-27 14:44:22,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 29382 flow, removed 24 selfloop flow, removed 7 redundant places. [2023-08-27 14:44:22,169 INFO L231 Difference]: Finished difference. Result has 340 places, 1048 transitions, 27001 flow [2023-08-27 14:44:22,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=26331, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=798, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=27001, PETRI_PLACES=340, PETRI_TRANSITIONS=1048} [2023-08-27 14:44:22,170 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 288 predicate places. [2023-08-27 14:44:22,170 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1048 transitions, 27001 flow [2023-08-27 14:44:22,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:22,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:44:22,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:44:22,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 14:44:22,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:22,375 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:44:22,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:44:22,375 INFO L85 PathProgramCache]: Analyzing trace with hash 558724887, now seen corresponding path program 9 times [2023-08-27 14:44:22,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:44:22,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631398852] [2023-08-27 14:44:22,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:44:22,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:44:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:44:23,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:44:23,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:44:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631398852] [2023-08-27 14:44:23,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631398852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:44:23,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331911573] [2023-08-27 14:44:23,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:44:23,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:23,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:44:23,125 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:44:23,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 14:44:23,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:44:23,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:44:23,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 14:44:23,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:44:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:44:23,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:44:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:44:23,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:44:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 14:44:23,693 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:44:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331911573] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:44:23,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:44:23,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2023-08-27 14:44:23,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710342051] [2023-08-27 14:44:23,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:44:23,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:44:23,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:44:23,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:44:23,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:44:23,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 503 [2023-08-27 14:44:23,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1048 transitions, 27001 flow. Second operand has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:23,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:44:23,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 503 [2023-08-27 14:44:23,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:44:31,035 INFO L124 PetriNetUnfolderBase]: 13318/21589 cut-off events. [2023-08-27 14:44:31,035 INFO L125 PetriNetUnfolderBase]: For 806897/807155 co-relation queries the response was YES. [2023-08-27 14:44:31,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207899 conditions, 21589 events. 13318/21589 cut-off events. For 806897/807155 co-relation queries the response was YES. Maximal size of possible extension queue 1150. Compared 161085 event pairs, 3969 based on Foata normal form. 459/20316 useless extension candidates. Maximal degree in co-relation 207764. Up to 17579 conditions per place. [2023-08-27 14:44:31,302 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 932 selfloop transitions, 134 changer transitions 0/1068 dead transitions. [2023-08-27 14:44:31,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1068 transitions, 29043 flow [2023-08-27 14:44:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:44:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:44:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1291 transitions. [2023-08-27 14:44:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36665719965918775 [2023-08-27 14:44:31,304 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1291 transitions. [2023-08-27 14:44:31,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1291 transitions. [2023-08-27 14:44:31,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:44:31,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1291 transitions. [2023-08-27 14:44:31,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 184.42857142857142) internal successors, (1291), 7 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:31,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:31,307 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 503.0) internal successors, (4024), 8 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:31,307 INFO L175 Difference]: Start difference. First operand has 340 places, 1048 transitions, 27001 flow. Second operand 7 states and 1291 transitions. [2023-08-27 14:44:31,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1068 transitions, 29043 flow [2023-08-27 14:44:40,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1068 transitions, 28300 flow, removed 17 selfloop flow, removed 13 redundant places. [2023-08-27 14:44:40,214 INFO L231 Difference]: Finished difference. Result has 334 places, 1028 transitions, 25977 flow [2023-08-27 14:44:40,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=25680, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1028, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=894, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25977, PETRI_PLACES=334, PETRI_TRANSITIONS=1028} [2023-08-27 14:44:40,215 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 282 predicate places. [2023-08-27 14:44:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1028 transitions, 25977 flow [2023-08-27 14:44:40,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 175.44444444444446) internal successors, (1579), 9 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:44:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:44:40,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-27 14:44:40,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-27 14:44:40,416 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:44:40,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:44:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1761247915, now seen corresponding path program 4 times [2023-08-27 14:44:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:44:40,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347772051] [2023-08-27 14:44:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:44:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:44:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:44:40,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:44:40,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:44:40,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347772051] [2023-08-27 14:44:40,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347772051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:44:40,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307097305] [2023-08-27 14:44:40,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:44:40,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:40,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:44:40,962 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:44:40,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 14:44:41,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:44:41,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:44:41,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 14:44:41,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:44:41,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:44:41,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:44:41,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 14:44:41,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:44:41,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307097305] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:44:41,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:44:41,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 14:44:41,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457304833] [2023-08-27 14:44:41,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:44:41,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:44:41,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:44:41,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:44:41,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:44:41,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:44:41,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1028 transitions, 25977 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:41,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:44:41,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:44:41,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:44:49,023 INFO L124 PetriNetUnfolderBase]: 13343/21680 cut-off events. [2023-08-27 14:44:49,023 INFO L125 PetriNetUnfolderBase]: For 744258/744521 co-relation queries the response was YES. [2023-08-27 14:44:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206094 conditions, 21680 events. 13343/21680 cut-off events. For 744258/744521 co-relation queries the response was YES. Maximal size of possible extension queue 1126. Compared 161311 event pairs, 3863 based on Foata normal form. 290/20201 useless extension candidates. Maximal degree in co-relation 205966. Up to 15243 conditions per place. [2023-08-27 14:44:49,277 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 858 selfloop transitions, 211 changer transitions 0/1071 dead transitions. [2023-08-27 14:44:49,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1071 transitions, 28612 flow [2023-08-27 14:44:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:44:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:44:49,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1132 transitions. [2023-08-27 14:44:49,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3750828363154407 [2023-08-27 14:44:49,279 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1132 transitions. [2023-08-27 14:44:49,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1132 transitions. [2023-08-27 14:44:49,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:44:49,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1132 transitions. [2023-08-27 14:44:49,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.66666666666666) internal successors, (1132), 6 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:49,282 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:49,282 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:49,282 INFO L175 Difference]: Start difference. First operand has 334 places, 1028 transitions, 25977 flow. Second operand 6 states and 1132 transitions. [2023-08-27 14:44:49,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1071 transitions, 28612 flow [2023-08-27 14:44:56,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1071 transitions, 28365 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 14:44:57,013 INFO L231 Difference]: Finished difference. Result has 334 places, 1025 transitions, 26030 flow [2023-08-27 14:44:57,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=25608, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=814, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=26030, PETRI_PLACES=334, PETRI_TRANSITIONS=1025} [2023-08-27 14:44:57,015 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 282 predicate places. [2023-08-27 14:44:57,015 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1025 transitions, 26030 flow [2023-08-27 14:44:57,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:57,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:44:57,015 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:44:57,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 14:44:57,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:57,221 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:44:57,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:44:57,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1761784153, now seen corresponding path program 3 times [2023-08-27 14:44:57,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:44:57,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541876546] [2023-08-27 14:44:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:44:57,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:44:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:44:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 14:44:57,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:44:57,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541876546] [2023-08-27 14:44:57,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541876546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:44:57,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264353837] [2023-08-27 14:44:57,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:44:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:44:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:44:57,896 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:44:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 14:44:58,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 14:44:58,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:44:58,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:44:58,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:44:58,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:44:58,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:44:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 14:44:58,384 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:44:58,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264353837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:44:58,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:44:58,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2023-08-27 14:44:58,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110156086] [2023-08-27 14:44:58,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:44:58,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:44:58,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:44:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:44:58,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:44:58,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 503 [2023-08-27 14:44:58,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1025 transitions, 26030 flow. Second operand has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:58,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:44:58,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 503 [2023-08-27 14:44:58,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:45:06,106 INFO L124 PetriNetUnfolderBase]: 13286/21581 cut-off events. [2023-08-27 14:45:06,106 INFO L125 PetriNetUnfolderBase]: For 751533/751791 co-relation queries the response was YES. [2023-08-27 14:45:06,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206480 conditions, 21581 events. 13286/21581 cut-off events. For 751533/751791 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 160624 event pairs, 4545 based on Foata normal form. 272/20109 useless extension candidates. Maximal degree in co-relation 206352. Up to 17220 conditions per place. [2023-08-27 14:45:06,369 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 982 selfloop transitions, 85 changer transitions 0/1069 dead transitions. [2023-08-27 14:45:06,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1069 transitions, 28857 flow [2023-08-27 14:45:06,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:45:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:45:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1128 transitions. [2023-08-27 14:45:06,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37375745526838966 [2023-08-27 14:45:06,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1128 transitions. [2023-08-27 14:45:06,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1128 transitions. [2023-08-27 14:45:06,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:45:06,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1128 transitions. [2023-08-27 14:45:06,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:06,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:06,373 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 503.0) internal successors, (3521), 7 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:06,373 INFO L175 Difference]: Start difference. First operand has 334 places, 1025 transitions, 26030 flow. Second operand 6 states and 1128 transitions. [2023-08-27 14:45:06,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1069 transitions, 28857 flow [2023-08-27 14:45:14,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1069 transitions, 28503 flow, removed 9 selfloop flow, removed 7 redundant places. [2023-08-27 14:45:14,278 INFO L231 Difference]: Finished difference. Result has 332 places, 1022 transitions, 25708 flow [2023-08-27 14:45:14,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=25538, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=25708, PETRI_PLACES=332, PETRI_TRANSITIONS=1022} [2023-08-27 14:45:14,279 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 280 predicate places. [2023-08-27 14:45:14,279 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 1022 transitions, 25708 flow [2023-08-27 14:45:14,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 178.625) internal successors, (1429), 8 states have internal predecessors, (1429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:14,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:45:14,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:45:14,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 14:45:14,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-27 14:45:14,480 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:45:14,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:45:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash -564162929, now seen corresponding path program 1 times [2023-08-27 14:45:14,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:45:14,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874741972] [2023-08-27 14:45:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:14,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:45:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:15,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:45:15,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:45:15,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874741972] [2023-08-27 14:45:15,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874741972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:45:15,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779443483] [2023-08-27 14:45:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:15,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:45:15,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:45:15,179 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:45:15,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 14:45:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:15,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 14:45:15,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:45:15,424 INFO L322 Elim1Store]: treesize reduction 93, result has 14.7 percent of original size [2023-08-27 14:45:15,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 21 [2023-08-27 14:45:15,545 INFO L322 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2023-08-27 14:45:15,546 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 21 treesize of output 25 [2023-08-27 14:45:15,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 14:45:15,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 14:45:15,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 14:45:16,017 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 14:45:16,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:45:16,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:45:16,525 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:45:16,525 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2023-08-27 14:45:16,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:45:16,542 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 309 treesize of output 293 [2023-08-27 14:45:16,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 112 [2023-08-27 14:45:16,557 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 53 treesize of output 47 [2023-08-27 14:45:16,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-08-27 14:45:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:45:16,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779443483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:45:16,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:45:16,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-27 14:45:16,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396073579] [2023-08-27 14:45:16,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:45:16,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 14:45:16,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:45:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 14:45:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=468, Unknown=4, NotChecked=0, Total=552 [2023-08-27 14:45:16,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 14:45:16,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 1022 transitions, 25708 flow. Second operand has 24 states, 24 states have (on average 147.91666666666666) internal successors, (3550), 24 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:16,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:45:16,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 14:45:16,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:45:28,735 INFO L124 PetriNetUnfolderBase]: 17390/26946 cut-off events. [2023-08-27 14:45:28,735 INFO L125 PetriNetUnfolderBase]: For 770864/771127 co-relation queries the response was YES. [2023-08-27 14:45:28,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231723 conditions, 26946 events. 17390/26946 cut-off events. For 770864/771127 co-relation queries the response was YES. Maximal size of possible extension queue 1286. Compared 191628 event pairs, 3268 based on Foata normal form. 250/23098 useless extension candidates. Maximal degree in co-relation 231598. Up to 12608 conditions per place. [2023-08-27 14:45:29,083 INFO L140 encePairwiseOnDemand]: 490/503 looper letters, 1089 selfloop transitions, 358 changer transitions 0/1449 dead transitions. [2023-08-27 14:45:29,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1449 transitions, 37729 flow [2023-08-27 14:45:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 14:45:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 14:45:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2640 transitions. [2023-08-27 14:45:29,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30873582037188635 [2023-08-27 14:45:29,086 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2640 transitions. [2023-08-27 14:45:29,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2640 transitions. [2023-08-27 14:45:29,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:45:29,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2640 transitions. [2023-08-27 14:45:29,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 155.2941176470588) internal successors, (2640), 17 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:29,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 503.0) internal successors, (9054), 18 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:29,093 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 503.0) internal successors, (9054), 18 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:29,093 INFO L175 Difference]: Start difference. First operand has 332 places, 1022 transitions, 25708 flow. Second operand 17 states and 2640 transitions. [2023-08-27 14:45:29,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1449 transitions, 37729 flow [2023-08-27 14:45:37,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1449 transitions, 37496 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 14:45:37,046 INFO L231 Difference]: Finished difference. Result has 347 places, 1050 transitions, 26793 flow [2023-08-27 14:45:37,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=25567, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=26793, PETRI_PLACES=347, PETRI_TRANSITIONS=1050} [2023-08-27 14:45:37,047 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 295 predicate places. [2023-08-27 14:45:37,048 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1050 transitions, 26793 flow [2023-08-27 14:45:37,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 147.91666666666666) internal successors, (3550), 24 states have internal predecessors, (3550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:37,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:45:37,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:45:37,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 14:45:37,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-27 14:45:37,257 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:45:37,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:45:37,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1744176368, now seen corresponding path program 1 times [2023-08-27 14:45:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:45:37,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707292132] [2023-08-27 14:45:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:45:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:45:37,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:45:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707292132] [2023-08-27 14:45:37,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707292132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:45:37,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406968023] [2023-08-27 14:45:37,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:37,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:45:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:45:37,787 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:45:37,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 14:45:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:37,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 14:45:37,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:45:38,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:45:38,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 14:45:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:45:38,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:45:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406968023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:45:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:45:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 14 [2023-08-27 14:45:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515520674] [2023-08-27 14:45:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:45:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 14:45:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:45:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 14:45:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:45:38,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 503 [2023-08-27 14:45:38,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1050 transitions, 26793 flow. Second operand has 9 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:38,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:45:38,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 503 [2023-08-27 14:45:38,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:45:47,892 INFO L124 PetriNetUnfolderBase]: 18701/28727 cut-off events. [2023-08-27 14:45:47,892 INFO L125 PetriNetUnfolderBase]: For 952790/953048 co-relation queries the response was YES. [2023-08-27 14:45:48,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266489 conditions, 28727 events. 18701/28727 cut-off events. For 952790/953048 co-relation queries the response was YES. Maximal size of possible extension queue 1448. Compared 203555 event pairs, 4099 based on Foata normal form. 386/25063 useless extension candidates. Maximal degree in co-relation 266361. Up to 20722 conditions per place. [2023-08-27 14:45:48,397 INFO L140 encePairwiseOnDemand]: 489/503 looper letters, 929 selfloop transitions, 229 changer transitions 0/1160 dead transitions. [2023-08-27 14:45:48,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1160 transitions, 30965 flow [2023-08-27 14:45:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:45:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:45:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1416 transitions. [2023-08-27 14:45:48,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3518886679920477 [2023-08-27 14:45:48,399 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1416 transitions. [2023-08-27 14:45:48,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1416 transitions. [2023-08-27 14:45:48,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:45:48,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1416 transitions. [2023-08-27 14:45:48,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 177.0) internal successors, (1416), 8 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:48,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 503.0) internal successors, (4527), 9 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:48,402 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 503.0) internal successors, (4527), 9 states have internal predecessors, (4527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:48,402 INFO L175 Difference]: Start difference. First operand has 347 places, 1050 transitions, 26793 flow. Second operand 8 states and 1416 transitions. [2023-08-27 14:45:48,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1160 transitions, 30965 flow [2023-08-27 14:45:57,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1160 transitions, 30134 flow, removed 53 selfloop flow, removed 11 redundant places. [2023-08-27 14:45:57,346 INFO L231 Difference]: Finished difference. Result has 346 places, 1076 transitions, 27117 flow [2023-08-27 14:45:57,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=25758, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1044, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=818, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=27117, PETRI_PLACES=346, PETRI_TRANSITIONS=1076} [2023-08-27 14:45:57,346 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 294 predicate places. [2023-08-27 14:45:57,347 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1076 transitions, 27117 flow [2023-08-27 14:45:57,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 166.77777777777777) internal successors, (1501), 9 states have internal predecessors, (1501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:57,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:45:57,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:45:57,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 14:45:57,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 14:45:57,548 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:45:57,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:45:57,548 INFO L85 PathProgramCache]: Analyzing trace with hash -144236802, now seen corresponding path program 2 times [2023-08-27 14:45:57,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:45:57,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352764243] [2023-08-27 14:45:57,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:45:57,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:45:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:45:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:45:58,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:45:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352764243] [2023-08-27 14:45:58,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352764243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:45:58,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079074763] [2023-08-27 14:45:58,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:45:58,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:45:58,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:45:58,527 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:45:58,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 14:45:58,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:45:58,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:45:58,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 14:45:58,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:45:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:45:59,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:45:59,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079074763] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:45:59,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:45:59,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-08-27 14:45:59,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121354727] [2023-08-27 14:45:59,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:45:59,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:45:59,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:45:59,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:45:59,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:45:59,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 503 [2023-08-27 14:45:59,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1076 transitions, 27117 flow. Second operand has 6 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:45:59,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:45:59,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 503 [2023-08-27 14:45:59,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:46:08,818 INFO L124 PetriNetUnfolderBase]: 19474/30098 cut-off events. [2023-08-27 14:46:08,818 INFO L125 PetriNetUnfolderBase]: For 967709/967967 co-relation queries the response was YES. [2023-08-27 14:46:09,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285990 conditions, 30098 events. 19474/30098 cut-off events. For 967709/967967 co-relation queries the response was YES. Maximal size of possible extension queue 1499. Compared 216905 event pairs, 3982 based on Foata normal form. 245/27869 useless extension candidates. Maximal degree in co-relation 285862. Up to 14639 conditions per place. [2023-08-27 14:46:09,332 INFO L140 encePairwiseOnDemand]: 495/503 looper letters, 862 selfloop transitions, 255 changer transitions 0/1119 dead transitions. [2023-08-27 14:46:09,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1119 transitions, 30123 flow [2023-08-27 14:46:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:46:09,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:46:09,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 787 transitions. [2023-08-27 14:46:09,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911530815109344 [2023-08-27 14:46:09,334 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 787 transitions. [2023-08-27 14:46:09,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 787 transitions. [2023-08-27 14:46:09,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:46:09,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 787 transitions. [2023-08-27 14:46:09,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:09,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:09,336 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:09,336 INFO L175 Difference]: Start difference. First operand has 346 places, 1076 transitions, 27117 flow. Second operand 4 states and 787 transitions. [2023-08-27 14:46:09,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1119 transitions, 30123 flow [2023-08-27 14:46:17,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1119 transitions, 29744 flow, removed 29 selfloop flow, removed 4 redundant places. [2023-08-27 14:46:17,632 INFO L231 Difference]: Finished difference. Result has 346 places, 1078 transitions, 27558 flow [2023-08-27 14:46:17,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=26705, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=27558, PETRI_PLACES=346, PETRI_TRANSITIONS=1078} [2023-08-27 14:46:17,633 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 294 predicate places. [2023-08-27 14:46:17,633 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1078 transitions, 27558 flow [2023-08-27 14:46:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:17,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:46:17,633 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:46:17,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 14:46:17,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 14:46:17,834 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:46:17,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:46:17,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1655413910, now seen corresponding path program 1 times [2023-08-27 14:46:17,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:46:17,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427220744] [2023-08-27 14:46:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:46:17,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:46:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:46:18,548 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 14:46:18,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:46:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427220744] [2023-08-27 14:46:18,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427220744] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:46:18,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530904315] [2023-08-27 14:46:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:46:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:46:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:46:18,551 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:46:18,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 14:46:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:46:18,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 14:46:18,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:46:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 14:46:18,894 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:46:18,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530904315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:46:18,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:46:18,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-08-27 14:46:18,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025869340] [2023-08-27 14:46:18,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:46:18,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:46:18,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:46:18,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:46:18,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:46:18,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 503 [2023-08-27 14:46:18,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1078 transitions, 27558 flow. Second operand has 6 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:46:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 503 [2023-08-27 14:46:18,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:46:28,689 INFO L124 PetriNetUnfolderBase]: 18636/29260 cut-off events. [2023-08-27 14:46:28,689 INFO L125 PetriNetUnfolderBase]: For 1020907/1021165 co-relation queries the response was YES. [2023-08-27 14:46:28,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289503 conditions, 29260 events. 18636/29260 cut-off events. For 1020907/1021165 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 215609 event pairs, 4131 based on Foata normal form. 393/28017 useless extension candidates. Maximal degree in co-relation 289373. Up to 14639 conditions per place. [2023-08-27 14:46:29,044 INFO L140 encePairwiseOnDemand]: 496/503 looper letters, 862 selfloop transitions, 249 changer transitions 0/1113 dead transitions. [2023-08-27 14:46:29,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1113 transitions, 30450 flow [2023-08-27 14:46:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:46:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:46:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2023-08-27 14:46:29,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39065606361829025 [2023-08-27 14:46:29,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2023-08-27 14:46:29,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2023-08-27 14:46:29,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:46:29,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2023-08-27 14:46:29,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:29,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:29,048 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:29,048 INFO L175 Difference]: Start difference. First operand has 346 places, 1078 transitions, 27558 flow. Second operand 4 states and 786 transitions. [2023-08-27 14:46:29,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1113 transitions, 30450 flow [2023-08-27 14:46:39,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1113 transitions, 30178 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-27 14:46:39,088 INFO L231 Difference]: Finished difference. Result has 347 places, 1072 transitions, 27720 flow [2023-08-27 14:46:39,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=27222, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=27720, PETRI_PLACES=347, PETRI_TRANSITIONS=1072} [2023-08-27 14:46:39,089 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 295 predicate places. [2023-08-27 14:46:39,090 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 1072 transitions, 27720 flow [2023-08-27 14:46:39,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 184.66666666666666) internal successors, (1108), 6 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:39,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:46:39,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:46:39,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 14:46:39,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 14:46:39,296 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:46:39,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:46:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1212309184, now seen corresponding path program 1 times [2023-08-27 14:46:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:46:39,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971973931] [2023-08-27 14:46:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:46:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:46:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:46:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:46:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:46:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971973931] [2023-08-27 14:46:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971973931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:46:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927231792] [2023-08-27 14:46:39,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:46:39,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:46:39,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:46:39,421 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:46:39,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-27 14:46:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:46:39,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 14:46:39,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:46:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 14:46:39,715 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:46:39,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927231792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:46:39,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:46:39,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2023-08-27 14:46:39,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840130820] [2023-08-27 14:46:39,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:46:39,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:46:39,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:46:39,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:46:39,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:46:39,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 503 [2023-08-27 14:46:39,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 1072 transitions, 27720 flow. Second operand has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:39,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:46:39,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 503 [2023-08-27 14:46:39,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:46:49,836 INFO L124 PetriNetUnfolderBase]: 19638/30760 cut-off events. [2023-08-27 14:46:49,836 INFO L125 PetriNetUnfolderBase]: For 1157562/1157820 co-relation queries the response was YES. [2023-08-27 14:46:50,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312630 conditions, 30760 events. 19638/30760 cut-off events. For 1157562/1157820 co-relation queries the response was YES. Maximal size of possible extension queue 1410. Compared 224350 event pairs, 4280 based on Foata normal form. 1285/30871 useless extension candidates. Maximal degree in co-relation 312500. Up to 16607 conditions per place. [2023-08-27 14:46:50,262 INFO L140 encePairwiseOnDemand]: 494/503 looper letters, 767 selfloop transitions, 163 changer transitions 209/1141 dead transitions. [2023-08-27 14:46:50,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1141 transitions, 31113 flow [2023-08-27 14:46:50,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:46:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:46:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 908 transitions. [2023-08-27 14:46:50,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45129224652087474 [2023-08-27 14:46:50,264 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 908 transitions. [2023-08-27 14:46:50,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 908 transitions. [2023-08-27 14:46:50,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:46:50,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 908 transitions. [2023-08-27 14:46:50,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.0) internal successors, (908), 4 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:50,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:50,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 503.0) internal successors, (2515), 5 states have internal predecessors, (2515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:46:50,266 INFO L175 Difference]: Start difference. First operand has 347 places, 1072 transitions, 27720 flow. Second operand 4 states and 908 transitions. [2023-08-27 14:46:50,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1141 transitions, 31113 flow [2023-08-27 14:47:01,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1141 transitions, 30599 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:47:01,337 INFO L231 Difference]: Finished difference. Result has 349 places, 882 transitions, 22285 flow [2023-08-27 14:47:01,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=27222, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1072, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=22285, PETRI_PLACES=349, PETRI_TRANSITIONS=882} [2023-08-27 14:47:01,338 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 297 predicate places. [2023-08-27 14:47:01,339 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 882 transitions, 22285 flow [2023-08-27 14:47:01,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.25) internal successors, (853), 4 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:01,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:47:01,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:47:01,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-27 14:47:01,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 14:47:01,539 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:47:01,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:47:01,540 INFO L85 PathProgramCache]: Analyzing trace with hash 138633187, now seen corresponding path program 1 times [2023-08-27 14:47:01,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:47:01,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575817856] [2023-08-27 14:47:01,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:47:01,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:47:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:47:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:47:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:47:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575817856] [2023-08-27 14:47:02,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575817856] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:47:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717455481] [2023-08-27 14:47:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:47:02,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:47:02,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:47:02,231 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:47:02,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-27 14:47:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:47:02,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 14:47:02,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:47:02,503 INFO L322 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2023-08-27 14:47:02,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 15 treesize of output 38 [2023-08-27 14:47:02,576 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 14:47:02,576 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 11 treesize of output 11 [2023-08-27 14:47:02,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 14:47:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:47:03,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:47:03,199 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:03,199 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-08-27 14:47:03,232 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 11 treesize of output 5 [2023-08-27 14:47:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:47:03,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717455481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:47:03,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:47:03,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-27 14:47:03,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945151100] [2023-08-27 14:47:03,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:47:03,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 14:47:03,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:47:03,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 14:47:03,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=471, Unknown=3, NotChecked=0, Total=552 [2023-08-27 14:47:03,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 503 [2023-08-27 14:47:03,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 882 transitions, 22285 flow. Second operand has 24 states, 24 states have (on average 148.0) internal successors, (3552), 24 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:03,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:47:03,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 503 [2023-08-27 14:47:03,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:47:05,501 WARN L839 $PredicateComparison]: unable to prove that (and (or (< c_~q2_back~0 0) (< 0 c_~q2_back~0) (and (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#t3~0#1.base|) 0)) (or (= c_~q2_front~0 c_~q2_back~0) (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_151| Int)) (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_151|) 0)))))) (forall ((v_ArrVal_2528 (Array Int Int))) (< 0 (+ 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2528) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))))))) is different from false [2023-08-27 14:47:16,452 INFO L124 PetriNetUnfolderBase]: 18722/30335 cut-off events. [2023-08-27 14:47:16,452 INFO L125 PetriNetUnfolderBase]: For 1174110/1174456 co-relation queries the response was YES. [2023-08-27 14:47:16,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316149 conditions, 30335 events. 18722/30335 cut-off events. For 1174110/1174456 co-relation queries the response was YES. Maximal size of possible extension queue 1524. Compared 234799 event pairs, 5089 based on Foata normal form. 333/29902 useless extension candidates. Maximal degree in co-relation 316017. Up to 15537 conditions per place. [2023-08-27 14:47:16,927 INFO L140 encePairwiseOnDemand]: 485/503 looper letters, 1043 selfloop transitions, 245 changer transitions 201/1491 dead transitions. [2023-08-27 14:47:16,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1491 transitions, 38991 flow [2023-08-27 14:47:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 14:47:16,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 14:47:16,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3244 transitions. [2023-08-27 14:47:16,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30710972261668085 [2023-08-27 14:47:16,929 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3244 transitions. [2023-08-27 14:47:16,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3244 transitions. [2023-08-27 14:47:16,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:47:16,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3244 transitions. [2023-08-27 14:47:16,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 154.47619047619048) internal successors, (3244), 21 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:16,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 503.0) internal successors, (11066), 22 states have internal predecessors, (11066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:16,937 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 503.0) internal successors, (11066), 22 states have internal predecessors, (11066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:16,937 INFO L175 Difference]: Start difference. First operand has 349 places, 882 transitions, 22285 flow. Second operand 21 states and 3244 transitions. [2023-08-27 14:47:16,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1491 transitions, 38991 flow [2023-08-27 14:47:27,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1491 transitions, 38627 flow, removed 88 selfloop flow, removed 5 redundant places. [2023-08-27 14:47:27,693 INFO L231 Difference]: Finished difference. Result has 362 places, 856 transitions, 21627 flow [2023-08-27 14:47:27,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=503, PETRI_DIFFERENCE_MINUEND_FLOW=21974, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=21627, PETRI_PLACES=362, PETRI_TRANSITIONS=856} [2023-08-27 14:47:27,694 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 310 predicate places. [2023-08-27 14:47:27,694 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 856 transitions, 21627 flow [2023-08-27 14:47:27,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 148.0) internal successors, (3552), 24 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:47:27,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:47:27,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:47:27,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-27 14:47:27,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-27 14:47:27,895 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 37 more)] === [2023-08-27 14:47:27,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:47:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1455502909, now seen corresponding path program 2 times [2023-08-27 14:47:27,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:47:27,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953537352] [2023-08-27 14:47:27,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:47:27,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:47:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:47:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:47:30,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:47:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953537352] [2023-08-27 14:47:30,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953537352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:47:30,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717335496] [2023-08-27 14:47:30,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:47:30,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:47:30,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:47:30,043 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 14:47:30,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-27 14:47:30,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:47:30,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:47:30,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-27 14:47:30,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:47:30,670 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 14:47:30,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:47:30,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 14:47:30,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:47:30,963 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 14:47:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:47:31,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:47:33,158 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q1_front~0 1))) (or (<= c_~n1~0 c_~q1_back~0) (< .cse0 0) (< c_~q1_back~0 0) (<= c_~n1~0 .cse0) (let ((.cse5 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((~q1~0.base Int) (v_ArrVal_2588 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2588))) (let ((.cse2 (select .cse4 ~q1~0.base))) (or (forall ((v_~q2_back~0_144 Int)) (let ((.cse1 (select (select .cse4 c_~q2~0.base) (+ (* 4 v_~q2_back~0_144) c_~q2~0.offset)))) (or (< v_~q2_back~0_144 1) (< 0 (+ .cse1 2147483650)) (<= c_~n2~0 v_~q2_back~0_144) (< 0 (+ 2147483649 .cse1 (select .cse2 .cse3)))))) (not (= (select .cse2 .cse5) 1)))))) (forall ((~q1~0.base Int) (v_ArrVal_2588 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2588))) (let ((.cse8 (select .cse6 ~q1~0.base))) (let ((.cse7 (select .cse8 .cse3))) (or (forall ((v_~q2_back~0_144 Int)) (or (< v_~q2_back~0_144 1) (<= c_~n2~0 v_~q2_back~0_144) (< 0 (+ 2147483649 (select (select .cse6 c_~q2~0.base) (+ (* 4 v_~q2_back~0_144) c_~q2~0.offset)) .cse7)))) (not (= (select .cse8 .cse5) 1)) (< 0 (+ .cse7 1))))))))))) is different from false [2023-08-27 14:47:33,317 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q1_front~0 1))) (or (<= c_~n1~0 c_~q1_back~0) (< .cse0 0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (let ((.cse2 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse4 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((~q1~0.base Int) (v_ArrVal_2588 (Array Int Int)) (v_ArrVal_2587 (Array Int Int))) (let ((.cse5 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2587) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2588))) (let ((.cse1 (select .cse5 ~q1~0.base))) (or (not (= (select .cse1 .cse2) 1)) (forall ((v_~q2_back~0_144 Int)) (let ((.cse3 (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* 4 v_~q2_back~0_144) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)))) (or (< v_~q2_back~0_144 1) (< 0 (+ .cse3 2147483650)) (<= c_~n2~0 v_~q2_back~0_144) (< 0 (+ .cse3 2147483649 (select .cse1 .cse4)))))))))) (forall ((~q1~0.base Int) (v_ArrVal_2588 (Array Int Int)) (v_ArrVal_2587 (Array Int Int))) (let ((.cse8 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2587) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2588))) (let ((.cse7 (select .cse8 ~q1~0.base))) (let ((.cse6 (select .cse7 .cse4))) (or (< 0 (+ .cse6 1)) (not (= (select .cse7 .cse2) 1)) (forall ((v_~q2_back~0_144 Int)) (or (< v_~q2_back~0_144 1) (<= c_~n2~0 v_~q2_back~0_144) (< 0 (+ (select (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* 4 v_~q2_back~0_144) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 2147483649 .cse6))))))))))) (< c_~q1_back~0 0) (<= c_~n1~0 .cse0))) is different from false [2023-08-27 14:47:33,373 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:33,373 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 253 treesize of output 170 [2023-08-27 14:47:33,975 INFO L322 Elim1Store]: treesize reduction 22, result has 92.8 percent of original size [2023-08-27 14:47:33,976 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 1779 treesize of output 1823 [2023-08-27 14:47:34,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:34,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1055 treesize of output 976 [2023-08-27 14:47:34,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:34,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 935 treesize of output 916 [2023-08-27 14:47:34,290 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:34,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 875 treesize of output 796 [2023-08-27 14:47:34,410 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:47:34,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 755 treesize of output 736 Received shutdown request... [2023-08-27 14:51:13,252 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (39 of 40 remaining) [2023-08-27 14:51:13,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-27 14:51:13,282 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 14:51:13,282 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 14:51:13,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:51:13,461 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. [2023-08-27 14:51:13,463 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (38 of 40 remaining) [2023-08-27 14:51:13,463 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (37 of 40 remaining) [2023-08-27 14:51:13,464 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (36 of 40 remaining) [2023-08-27 14:51:13,464 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 40 remaining) [2023-08-27 14:51:13,464 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 40 remaining) [2023-08-27 14:51:13,464 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 40 remaining) [2023-08-27 14:51:13,466 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 40 remaining) [2023-08-27 14:51:13,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 40 remaining) [2023-08-27 14:51:13,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 40 remaining) [2023-08-27 14:51:13,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 40 remaining) [2023-08-27 14:51:13,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 40 remaining) [2023-08-27 14:51:13,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 40 remaining) [2023-08-27 14:51:13,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 40 remaining) [2023-08-27 14:51:13,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 40 remaining) [2023-08-27 14:51:13,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 40 remaining) [2023-08-27 14:51:13,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 40 remaining) [2023-08-27 14:51:13,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 40 remaining) [2023-08-27 14:51:13,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 40 remaining) [2023-08-27 14:51:13,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 40 remaining) [2023-08-27 14:51:13,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 40 remaining) [2023-08-27 14:51:13,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (18 of 40 remaining) [2023-08-27 14:51:13,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 40 remaining) [2023-08-27 14:51:13,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 40 remaining) [2023-08-27 14:51:13,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 40 remaining) [2023-08-27 14:51:13,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 40 remaining) [2023-08-27 14:51:13,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 40 remaining) [2023-08-27 14:51:13,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 40 remaining) [2023-08-27 14:51:13,470 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 40 remaining) [2023-08-27 14:51:13,471 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 40 remaining) [2023-08-27 14:51:13,472 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 40 remaining) [2023-08-27 14:51:13,472 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 40 remaining) [2023-08-27 14:51:13,472 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 40 remaining) [2023-08-27 14:51:13,472 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 40 remaining) [2023-08-27 14:51:13,473 INFO L445 BasicCegarLoop]: Path program histogram: [9, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:51:13,480 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 14:51:13,480 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 14:51:13,482 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 02:51:13 BasicIcfg [2023-08-27 14:51:13,482 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 14:51:13,483 INFO L158 Benchmark]: Toolchain (without parser) took 802230.03ms. Allocated memory was 371.2MB in the beginning and 10.8GB in the end (delta: 10.4GB). Free memory was 328.1MB in the beginning and 5.9GB in the end (delta: -5.6GB). Peak memory consumption was 7.6GB. Max. memory is 16.0GB. [2023-08-27 14:51:13,483 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 371.2MB. Free memory is still 347.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 14:51:13,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.79ms. Allocated memory is still 371.2MB. Free memory was 328.1MB in the beginning and 315.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 14:51:13,483 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.38ms. Allocated memory is still 371.2MB. Free memory was 315.5MB in the beginning and 312.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 14:51:13,483 INFO L158 Benchmark]: Boogie Preprocessor took 52.54ms. Allocated memory is still 371.2MB. Free memory was 312.9MB in the beginning and 311.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 14:51:13,484 INFO L158 Benchmark]: RCFGBuilder took 693.07ms. Allocated memory is still 371.2MB. Free memory was 311.3MB in the beginning and 312.5MB in the end (delta: -1.2MB). Peak memory consumption was 14.4MB. Max. memory is 16.0GB. [2023-08-27 14:51:13,484 INFO L158 Benchmark]: TraceAbstraction took 801132.89ms. Allocated memory was 371.2MB in the beginning and 10.8GB in the end (delta: 10.4GB). Free memory was 312.0MB in the beginning and 5.9GB in the end (delta: -5.6GB). Peak memory consumption was 7.6GB. Max. memory is 16.0GB. [2023-08-27 14:51:13,485 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 371.2MB. Free memory is still 347.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 278.79ms. Allocated memory is still 371.2MB. Free memory was 328.1MB in the beginning and 315.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 67.38ms. Allocated memory is still 371.2MB. Free memory was 315.5MB in the beginning and 312.9MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 52.54ms. Allocated memory is still 371.2MB. Free memory was 312.9MB in the beginning and 311.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 693.07ms. Allocated memory is still 371.2MB. Free memory was 311.3MB in the beginning and 312.5MB in the end (delta: -1.2MB). Peak memory consumption was 14.4MB. Max. memory is 16.0GB. * TraceAbstraction took 801132.89ms. Allocated memory was 371.2MB in the beginning and 10.8GB in the end (delta: 10.4GB). Free memory was 312.0MB in the beginning and 5.9GB in the end (delta: -5.6GB). Peak memory consumption was 7.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.2s, 226 PlacesBefore, 52 PlacesAfterwards, 234 TransitionsBefore, 48 TransitionsAfterwards, 3960 CoEnabledTransitionPairs, 7 FixpointIterations, 142 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 28 TrivialYvCompositions, 12 ConcurrentYvCompositions, 12 ChoiceCompositions, 255 TotalNumberOfCompositions, 7261 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4994, independent: 4873, independent conditional: 0, independent unconditional: 4873, dependent: 121, dependent conditional: 0, dependent unconditional: 121, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2297, independent: 2260, independent conditional: 0, independent unconditional: 2260, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4994, independent: 2613, independent conditional: 0, independent unconditional: 2613, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 2297, unknown conditional: 0, unknown unconditional: 2297] , Statistics on independence cache: Total cache size (in pairs): 189, Positive cache size: 176, Positive conditional cache size: 0, Positive unconditional cache size: 176, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 145]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 129]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 19 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-3-1 term,while PolyPacSimplificationTermWalker was simplifying 3 xjuncts wrt. a ∧-31-10-3-6-5-7-6-11-5-10-5-10-4-9-4-10-4-6-4-3-2-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 290 locations, 40 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 801.0s, OverallIterations: 52, TraceHistogramMax: 10, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 505.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.4s, HoareTripleCheckerStatistics: 668 mSolverCounterUnknown, 4539 SdHoareTripleChecker+Valid, 45.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4539 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 43.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1600 IncrementalHoareTripleChecker+Unchecked, 8 mSDsCounter, 795 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19561 IncrementalHoareTripleChecker+Invalid, 22624 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 795 mSolverCounterUnsat, 4 mSDtfsCounter, 19561 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 668 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1266 GetRequests, 413 SyntacticMatches, 11 SemanticMatches, 842 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 4390 ImplicationChecksByTransitivity, 104.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27720occurred in iteration=49, InterpolantAutomatonStates: 454, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 45.1s InterpolantComputationTime, 1242 NumberOfCodeBlocks, 1177 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 1354 ConstructedInterpolants, 121 QuantifiedInterpolants, 25510 SizeOfPredicates, 318 NumberOfNonLiveVariables, 10155 ConjunctsInSsa, 767 ConjunctsInUnsatCore, 111 InterpolantComputations, 38 PerfectInterpolantSequences, 305/498 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown