/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --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-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:04:59,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:05:00,036 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 08:05:00,041 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:05:00,041 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:05:00,072 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:05:00,073 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:05:00,073 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:05:00,074 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:05:00,077 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:05:00,077 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:05:00,078 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:05:00,078 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:05:00,079 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:05:00,079 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:05:00,080 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:05:00,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:05:00,080 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:05:00,080 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:05:00,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:05:00,081 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:05:00,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:05:00,081 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:05:00,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:05:00,082 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:05:00,082 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:05:00,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:05:00,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:05:00,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:05:00,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:05:00,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:05:00,084 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:05:00,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:05:00,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:05:00,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:05:00,085 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:05:00,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:05:00,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:05:00,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:05:00,440 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:05:00,440 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:05:00,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-27 08:05:01,659 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:05:01,822 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:05:01,823 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-27 08:05:01,829 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f433ea139/a72174935c3a42dfbff574daad792366/FLAG983a6a6f9 [2023-08-27 08:05:01,841 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f433ea139/a72174935c3a42dfbff574daad792366 [2023-08-27 08:05:01,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:05:01,850 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:05:01,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:05:01,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:05:01,855 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:05:01,856 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:05:01" (1/1) ... [2023-08-27 08:05:01,857 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a1fa70f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:01, skipping insertion in model container [2023-08-27 08:05:01,857 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:05:01" (1/1) ... [2023-08-27 08:05:01,883 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:05:02,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:05:02,079 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:05:02,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:05:02,130 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:05:02,131 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:05:02,137 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:05:02,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02 WrapperNode [2023-08-27 08:05:02,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:05:02,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:05:02,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:05:02,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:05:02,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,167 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,198 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 184 [2023-08-27 08:05:02,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:05:02,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:05:02,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:05:02,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:05:02,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,212 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,212 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,229 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,242 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:05:02,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:05:02,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:05:02,246 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:05:02,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (1/1) ... [2023-08-27 08:05:02,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:05:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:02,275 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 08:05:02,296 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 08:05:02,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:05:02,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:05:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:05:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:05:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:05:02,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:05:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:05:02,313 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:05:02,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:05:02,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:05:02,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:05:02,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:05:02,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:05:02,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:05:02,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:05:02,315 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 08:05:02,401 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:05:02,405 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:05:02,661 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:05:02,774 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:05:02,774 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:05:02,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:05:02 BoogieIcfgContainer [2023-08-27 08:05:02,777 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:05:02,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:05:02,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:05:02,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:05:02,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:05:01" (1/3) ... [2023-08-27 08:05:02,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a15bb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:05:02, skipping insertion in model container [2023-08-27 08:05:02,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:05:02" (2/3) ... [2023-08-27 08:05:02,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a15bb0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:05:02, skipping insertion in model container [2023-08-27 08:05:02,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:05:02" (3/3) ... [2023-08-27 08:05:02,786 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-08-27 08:05:02,799 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:05:02,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 08:05:02,800 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:05:02,857 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:05:02,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 334 flow [2023-08-27 08:05:02,979 INFO L124 PetriNetUnfolderBase]: 11/157 cut-off events. [2023-08-27 08:05:02,980 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:05:02,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 115. Up to 3 conditions per place. [2023-08-27 08:05:02,986 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 159 transitions, 334 flow [2023-08-27 08:05:02,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 148 transitions, 308 flow [2023-08-27 08:05:02,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:05:03,008 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 148 transitions, 308 flow [2023-08-27 08:05:03,009 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 148 transitions, 308 flow [2023-08-27 08:05:03,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 148 transitions, 308 flow [2023-08-27 08:05:03,039 INFO L124 PetriNetUnfolderBase]: 11/148 cut-off events. [2023-08-27 08:05:03,039 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:05:03,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 11/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 115. Up to 3 conditions per place. [2023-08-27 08:05:03,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 1404 [2023-08-27 08:05:08,803 INFO L134 LiptonReduction]: Checked pairs total: 1888 [2023-08-27 08:05:08,803 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-27 08:05:08,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:05:08,822 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;@5dd7abf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:05:08,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-27 08:05:08,824 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:05:08,824 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:05:08,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:05:08,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:08,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:05:08,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:08,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:08,829 INFO L85 PathProgramCache]: Analyzing trace with hash 23272, now seen corresponding path program 1 times [2023-08-27 08:05:08,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:08,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738540304] [2023-08-27 08:05:08,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:08,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:09,017 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 08:05:09,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:09,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738540304] [2023-08-27 08:05:09,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738540304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:09,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:09,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:05:09,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853135735] [2023-08-27 08:05:09,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:09,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:09,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:09,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:05:09,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 317 [2023-08-27 08:05:09,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:09,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 317 [2023-08-27 08:05:09,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:09,171 INFO L124 PetriNetUnfolderBase]: 218/333 cut-off events. [2023-08-27 08:05:09,172 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 08:05:09,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 333 events. 218/333 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1261 event pairs, 122 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 617. Up to 330 conditions per place. [2023-08-27 08:05:09,175 INFO L140 encePairwiseOnDemand]: 311/317 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-27 08:05:09,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 110 flow [2023-08-27 08:05:09,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-27 08:05:09,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363827549947424 [2023-08-27 08:05:09,190 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-27 08:05:09,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-27 08:05:09,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:09,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-27 08:05:09,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,204 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,206 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 415 transitions. [2023-08-27 08:05:09,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 110 flow [2023-08-27 08:05:09,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 08:05:09,210 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 58 flow [2023-08-27 08:05:09,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-08-27 08:05:09,214 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -6 predicate places. [2023-08-27 08:05:09,214 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 58 flow [2023-08-27 08:05:09,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:09,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:05:09,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:05:09,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:09,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 23279, now seen corresponding path program 1 times [2023-08-27 08:05:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:09,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161665990] [2023-08-27 08:05:09,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:09,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:09,311 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 08:05:09,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:09,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161665990] [2023-08-27 08:05:09,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161665990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:09,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:09,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:05:09,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455523142] [2023-08-27 08:05:09,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:09,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:09,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:09,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:05:09,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 317 [2023-08-27 08:05:09,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:09,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 317 [2023-08-27 08:05:09,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:09,436 INFO L124 PetriNetUnfolderBase]: 219/335 cut-off events. [2023-08-27 08:05:09,436 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 08:05:09,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 335 events. 219/335 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1262 event pairs, 122 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 665. Up to 334 conditions per place. [2023-08-27 08:05:09,439 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 23 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-27 08:05:09,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 116 flow [2023-08-27 08:05:09,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-27 08:05:09,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353312302839117 [2023-08-27 08:05:09,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-27 08:05:09,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-27 08:05:09,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:09,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-27 08:05:09,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,449 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,449 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 58 flow. Second operand 3 states and 414 transitions. [2023-08-27 08:05:09,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 116 flow [2023-08-27 08:05:09,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:05:09,451 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 73 flow [2023-08-27 08:05:09,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-27 08:05:09,452 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-27 08:05:09,452 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 73 flow [2023-08-27 08:05:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:09,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:05:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 08:05:09,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:09,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash 722701, now seen corresponding path program 1 times [2023-08-27 08:05:09,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:09,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209688998] [2023-08-27 08:05:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:09,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:09,582 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 08:05:09,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209688998] [2023-08-27 08:05:09,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209688998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:09,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397520872] [2023-08-27 08:05:09,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:09,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:09,584 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 08:05:09,626 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 08:05:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:09,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:05:09,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:09,715 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 08:05:09,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:09,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397520872] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:09,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:09,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 08:05:09,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519033095] [2023-08-27 08:05:09,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:09,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:05:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:09,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:05:09,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:05:09,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 317 [2023-08-27 08:05:09,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 73 flow. Second operand has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:09,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 317 [2023-08-27 08:05:09,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:09,845 INFO L124 PetriNetUnfolderBase]: 222/341 cut-off events. [2023-08-27 08:05:09,845 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 08:05:09,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 341 events. 222/341 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1289 event pairs, 122 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 665. Up to 337 conditions per place. [2023-08-27 08:05:09,848 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 23 selfloop transitions, 9 changer transitions 0/33 dead transitions. [2023-08-27 08:05:09,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 161 flow [2023-08-27 08:05:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:05:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:05:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 809 transitions. [2023-08-27 08:05:09,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42534174553102 [2023-08-27 08:05:09,852 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 809 transitions. [2023-08-27 08:05:09,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 809 transitions. [2023-08-27 08:05:09,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:09,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 809 transitions. [2023-08-27 08:05:09,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,861 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 73 flow. Second operand 6 states and 809 transitions. [2023-08-27 08:05:09,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 161 flow [2023-08-27 08:05:09,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 156 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:09,863 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 129 flow [2023-08-27 08:05:09,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-27 08:05:09,864 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 08:05:09,864 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 129 flow [2023-08-27 08:05:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:09,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:09,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 08:05:09,875 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 08:05:10,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:10,072 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:10,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash 694512457, now seen corresponding path program 1 times [2023-08-27 08:05:10,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:10,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027954179] [2023-08-27 08:05:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:10,178 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 08:05:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027954179] [2023-08-27 08:05:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027954179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:10,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:10,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:05:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113383079] [2023-08-27 08:05:10,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:10,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:10,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:10,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:10,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:05:10,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 08:05:10,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:10,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 08:05:10,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:10,278 INFO L124 PetriNetUnfolderBase]: 226/373 cut-off events. [2023-08-27 08:05:10,278 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 08:05:10,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 373 events. 226/373 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1396 event pairs, 123 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 758. Up to 306 conditions per place. [2023-08-27 08:05:10,283 INFO L140 encePairwiseOnDemand]: 311/317 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-27 08:05:10,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 248 flow [2023-08-27 08:05:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-27 08:05:10,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45531019978969506 [2023-08-27 08:05:10,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-27 08:05:10,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-27 08:05:10,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:10,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-27 08:05:10,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,289 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 129 flow. Second operand 3 states and 433 transitions. [2023-08-27 08:05:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 248 flow [2023-08-27 08:05:10,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 227 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:10,293 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 136 flow [2023-08-27 08:05:10,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-27 08:05:10,295 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-27 08:05:10,295 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 136 flow [2023-08-27 08:05:10,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:10,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 08:05:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 08:05:10,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:10,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash 694512376, now seen corresponding path program 1 times [2023-08-27 08:05:10,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:10,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283411304] [2023-08-27 08:05:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:10,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:10,361 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 08:05:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283411304] [2023-08-27 08:05:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283411304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:10,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:10,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:05:10,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905059462] [2023-08-27 08:05:10,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:05:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:10,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:05:10,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:05:10,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 317 [2023-08-27 08:05:10,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:10,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 317 [2023-08-27 08:05:10,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:10,461 INFO L124 PetriNetUnfolderBase]: 206/348 cut-off events. [2023-08-27 08:05:10,462 INFO L125 PetriNetUnfolderBase]: For 43/60 co-relation queries the response was YES. [2023-08-27 08:05:10,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 348 events. 206/348 cut-off events. For 43/60 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1365 event pairs, 142 based on Foata normal form. 29/220 useless extension candidates. Maximal degree in co-relation 858. Up to 338 conditions per place. [2023-08-27 08:05:10,464 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 32 selfloop transitions, 2 changer transitions 6/41 dead transitions. [2023-08-27 08:05:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 228 flow [2023-08-27 08:05:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:05:10,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:05:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2023-08-27 08:05:10,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416403785488959 [2023-08-27 08:05:10,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2023-08-27 08:05:10,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2023-08-27 08:05:10,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:10,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2023-08-27 08:05:10,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,472 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,472 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 136 flow. Second operand 4 states and 528 transitions. [2023-08-27 08:05:10,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 228 flow [2023-08-27 08:05:10,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:10,476 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 149 flow [2023-08-27 08:05:10,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 08:05:10,478 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 08:05:10,478 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 149 flow [2023-08-27 08:05:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:10,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:05:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:05:10,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:10,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash 56156698, now seen corresponding path program 1 times [2023-08-27 08:05:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:10,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722798223] [2023-08-27 08:05:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:10,600 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 08:05:10,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:10,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722798223] [2023-08-27 08:05:10,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722798223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:10,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189839268] [2023-08-27 08:05:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:10,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:10,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:10,602 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 08:05:10,613 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 08:05:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:10,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:05:10,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:10,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:10,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189839268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:10,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 08:05:10,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592576651] [2023-08-27 08:05:10,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:10,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:10,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:10,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:05:10,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 317 [2023-08-27 08:05:10,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:10,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 317 [2023-08-27 08:05:10,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:10,753 INFO L124 PetriNetUnfolderBase]: 112/192 cut-off events. [2023-08-27 08:05:10,753 INFO L125 PetriNetUnfolderBase]: For 61/72 co-relation queries the response was YES. [2023-08-27 08:05:10,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 192 events. 112/192 cut-off events. For 61/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 594 event pairs, 72 based on Foata normal form. 35/142 useless extension candidates. Maximal degree in co-relation 547. Up to 191 conditions per place. [2023-08-27 08:05:10,755 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 29 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 08:05:10,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 191 flow [2023-08-27 08:05:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-27 08:05:10,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479495268138801 [2023-08-27 08:05:10,757 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-27 08:05:10,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-27 08:05:10,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:10,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-27 08:05:10,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,761 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,761 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 149 flow. Second operand 3 states and 426 transitions. [2023-08-27 08:05:10,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 191 flow [2023-08-27 08:05:10,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 185 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 08:05:10,765 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 127 flow [2023-08-27 08:05:10,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-27 08:05:10,767 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-27 08:05:10,767 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 127 flow [2023-08-27 08:05:10,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:10,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:10,768 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:05:10,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 08:05:10,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-27 08:05:10,973 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:10,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 56193647, now seen corresponding path program 2 times [2023-08-27 08:05:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889650490] [2023-08-27 08:05:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:10,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:11,049 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 08:05:11,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889650490] [2023-08-27 08:05:11,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889650490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:11,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300464285] [2023-08-27 08:05:11,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:11,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:11,052 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 08:05:11,054 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 08:05:11,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:05:11,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:11,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:05:11,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:11,130 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 08:05:11,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:11,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300464285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:11,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:11,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:05:11,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99272989] [2023-08-27 08:05:11,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:11,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:11,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:11,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:11,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:05:11,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 317 [2023-08-27 08:05:11,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:11,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 317 [2023-08-27 08:05:11,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:11,188 INFO L124 PetriNetUnfolderBase]: 112/191 cut-off events. [2023-08-27 08:05:11,189 INFO L125 PetriNetUnfolderBase]: For 56/67 co-relation queries the response was YES. [2023-08-27 08:05:11,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 191 events. 112/191 cut-off events. For 56/67 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 587 event pairs, 72 based on Foata normal form. 12/130 useless extension candidates. Maximal degree in co-relation 532. Up to 190 conditions per place. [2023-08-27 08:05:11,190 INFO L140 encePairwiseOnDemand]: 315/317 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-27 08:05:11,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 175 flow [2023-08-27 08:05:11,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:11,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:11,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-27 08:05:11,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43217665615141954 [2023-08-27 08:05:11,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-27 08:05:11,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-27 08:05:11,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:11,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-27 08:05:11,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,214 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 127 flow. Second operand 3 states and 411 transitions. [2023-08-27 08:05:11,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 175 flow [2023-08-27 08:05:11,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 159 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 08:05:11,216 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 103 flow [2023-08-27 08:05:11,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-27 08:05:11,216 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 08:05:11,216 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 103 flow [2023-08-27 08:05:11,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:11,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:11,224 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 08:05:11,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:11,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:11,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:11,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1740861068, now seen corresponding path program 1 times [2023-08-27 08:05:11,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:11,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779133943] [2023-08-27 08:05:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779133943] [2023-08-27 08:05:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779133943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:11,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:05:11,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843380465] [2023-08-27 08:05:11,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:11,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:11,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:11,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:05:11,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 08:05:11,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:11,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 08:05:11,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:11,521 INFO L124 PetriNetUnfolderBase]: 112/190 cut-off events. [2023-08-27 08:05:11,521 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-27 08:05:11,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 190 events. 112/190 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 591 event pairs, 27 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 521. Up to 99 conditions per place. [2023-08-27 08:05:11,522 INFO L140 encePairwiseOnDemand]: 314/317 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-27 08:05:11,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 198 flow [2023-08-27 08:05:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-27 08:05:11,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437434279705573 [2023-08-27 08:05:11,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-27 08:05:11,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-27 08:05:11,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:11,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-27 08:05:11,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,528 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,529 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 103 flow. Second operand 3 states and 422 transitions. [2023-08-27 08:05:11,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 198 flow [2023-08-27 08:05:11,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:11,530 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 104 flow [2023-08-27 08:05:11,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-27 08:05:11,532 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 08:05:11,532 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 104 flow [2023-08-27 08:05:11,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:11,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:11,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:05:11,535 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:11,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:11,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1740861069, now seen corresponding path program 1 times [2023-08-27 08:05:11,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:11,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725850365] [2023-08-27 08:05:11,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:11,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:11,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:11,601 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 08:05:11,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725850365] [2023-08-27 08:05:11,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725850365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:11,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575304525] [2023-08-27 08:05:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:11,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:11,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:11,603 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 08:05:11,605 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 08:05:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:11,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:05:11,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:11,693 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 08:05:11,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:11,707 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 08:05:11,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575304525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:11,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:11,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 08:05:11,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851467493] [2023-08-27 08:05:11,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:05:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:05:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:05:11,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 08:05:11,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 132.71428571428572) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:11,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 08:05:11,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:11,830 INFO L124 PetriNetUnfolderBase]: 199/313 cut-off events. [2023-08-27 08:05:11,830 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-08-27 08:05:11,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 313 events. 199/313 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 971 event pairs, 57 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 938. Up to 198 conditions per place. [2023-08-27 08:05:11,833 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 58 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2023-08-27 08:05:11,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 67 transitions, 368 flow [2023-08-27 08:05:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:05:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:05:11,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 849 transitions. [2023-08-27 08:05:11,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637223974763407 [2023-08-27 08:05:11,836 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 849 transitions. [2023-08-27 08:05:11,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 849 transitions. [2023-08-27 08:05:11,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:11,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 849 transitions. [2023-08-27 08:05:11,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,841 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,841 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 104 flow. Second operand 6 states and 849 transitions. [2023-08-27 08:05:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 67 transitions, 368 flow [2023-08-27 08:05:11,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 67 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:05:11,843 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 159 flow [2023-08-27 08:05:11,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=159, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-27 08:05:11,844 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-27 08:05:11,844 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 159 flow [2023-08-27 08:05:11,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.71428571428572) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:11,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:11,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:11,856 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 08:05:12,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:12,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:12,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1863311963, now seen corresponding path program 1 times [2023-08-27 08:05:12,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:12,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682227822] [2023-08-27 08:05:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:12,137 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 08:05:12,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:12,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682227822] [2023-08-27 08:05:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682227822] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:12,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:05:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030706081] [2023-08-27 08:05:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:12,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:05:12,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 317 [2023-08-27 08:05:12,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:12,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:12,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 317 [2023-08-27 08:05:12,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:12,200 INFO L124 PetriNetUnfolderBase]: 165/262 cut-off events. [2023-08-27 08:05:12,201 INFO L125 PetriNetUnfolderBase]: For 325/335 co-relation queries the response was YES. [2023-08-27 08:05:12,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 262 events. 165/262 cut-off events. For 325/335 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 711 event pairs, 31 based on Foata normal form. 12/207 useless extension candidates. Maximal degree in co-relation 934. Up to 245 conditions per place. [2023-08-27 08:05:12,203 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 35 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-27 08:05:12,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 244 flow [2023-08-27 08:05:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:12,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-27 08:05:12,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405888538380652 [2023-08-27 08:05:12,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-27 08:05:12,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-27 08:05:12,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:12,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-27 08:05:12,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:12,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:12,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:12,208 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 159 flow. Second operand 3 states and 419 transitions. [2023-08-27 08:05:12,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 244 flow [2023-08-27 08:05:12,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 219 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:12,210 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 151 flow [2023-08-27 08:05:12,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 08:05:12,211 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 08:05:12,211 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 151 flow [2023-08-27 08:05:12,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:12,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:12,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:12,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 08:05:12,212 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:12,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash 358463012, now seen corresponding path program 1 times [2023-08-27 08:05:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:12,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83111384] [2023-08-27 08:05:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:12,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:12,747 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 08:05:12,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:12,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83111384] [2023-08-27 08:05:12,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83111384] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757796657] [2023-08-27 08:05:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:12,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:12,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:12,749 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 08:05:12,753 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 08:05:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:12,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 08:05:12,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:12,913 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 08:05:12,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:12,961 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 08:05:13,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:13,008 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 08:05:13,110 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 08:05:13,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:13,357 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:13,357 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 08:05:13,367 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:13,367 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 175 treesize of output 159 [2023-08-27 08:05:13,374 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 08:05:13,393 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 08:05:13,450 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 08:05:13,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757796657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:13,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:13,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 08:05:13,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490060311] [2023-08-27 08:05:13,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:13,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:05:13,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:13,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:05:13,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=307, Unknown=1, NotChecked=0, Total=380 [2023-08-27 08:05:13,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:13,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 151 flow. Second operand has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:13,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:13,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:13,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:14,926 INFO L124 PetriNetUnfolderBase]: 545/798 cut-off events. [2023-08-27 08:05:14,927 INFO L125 PetriNetUnfolderBase]: For 717/747 co-relation queries the response was YES. [2023-08-27 08:05:14,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 798 events. 545/798 cut-off events. For 717/747 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2856 event pairs, 21 based on Foata normal form. 30/613 useless extension candidates. Maximal degree in co-relation 2792. Up to 425 conditions per place. [2023-08-27 08:05:14,932 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 115 selfloop transitions, 66 changer transitions 0/182 dead transitions. [2023-08-27 08:05:14,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 182 transitions, 1198 flow [2023-08-27 08:05:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:05:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:05:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1791 transitions. [2023-08-27 08:05:14,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3138801261829653 [2023-08-27 08:05:14,938 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1791 transitions. [2023-08-27 08:05:14,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1791 transitions. [2023-08-27 08:05:14,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:14,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1791 transitions. [2023-08-27 08:05:14,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.5) internal successors, (1791), 18 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:14,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:14,954 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:14,954 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 151 flow. Second operand 18 states and 1791 transitions. [2023-08-27 08:05:14,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 182 transitions, 1198 flow [2023-08-27 08:05:14,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 182 transitions, 1136 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-27 08:05:14,964 INFO L231 Difference]: Finished difference. Result has 62 places, 99 transitions, 726 flow [2023-08-27 08:05:14,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=726, PETRI_PLACES=62, PETRI_TRANSITIONS=99} [2023-08-27 08:05:14,965 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 29 predicate places. [2023-08-27 08:05:14,965 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 99 transitions, 726 flow [2023-08-27 08:05:14,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:14,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:14,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:14,974 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 08:05:15,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-27 08:05:15,175 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:15,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:15,175 INFO L85 PathProgramCache]: Analyzing trace with hash 234598307, now seen corresponding path program 1 times [2023-08-27 08:05:15,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:15,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048312178] [2023-08-27 08:05:15,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:15,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:15,724 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 08:05:15,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048312178] [2023-08-27 08:05:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048312178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:15,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226326576] [2023-08-27 08:05:15,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:15,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:15,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:15,726 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 08:05:15,748 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 08:05:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:15,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 08:05:15,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:15,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:05:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:15,908 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 08:05:15,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:15,977 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 08:05:16,078 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 08:05:16,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:16,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:16,261 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 29 treesize of output 30 [2023-08-27 08:05:16,269 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:16,269 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 79 treesize of output 71 [2023-08-27 08:05:16,274 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 48 [2023-08-27 08:05:16,279 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 26 treesize of output 20 [2023-08-27 08:05:16,347 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 08:05:16,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226326576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:16,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:16,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 08:05:16,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252999170] [2023-08-27 08:05:16,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:16,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:05:16,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:16,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:05:16,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:05:16,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:16,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 99 transitions, 726 flow. Second operand has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:16,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:16,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:16,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:18,035 INFO L124 PetriNetUnfolderBase]: 571/862 cut-off events. [2023-08-27 08:05:18,035 INFO L125 PetriNetUnfolderBase]: For 2855/2898 co-relation queries the response was YES. [2023-08-27 08:05:18,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4281 conditions, 862 events. 571/862 cut-off events. For 2855/2898 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3294 event pairs, 21 based on Foata normal form. 43/760 useless extension candidates. Maximal degree in co-relation 4257. Up to 468 conditions per place. [2023-08-27 08:05:18,043 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 134 selfloop transitions, 68 changer transitions 0/203 dead transitions. [2023-08-27 08:05:18,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 203 transitions, 2004 flow [2023-08-27 08:05:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:05:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:05:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1893 transitions. [2023-08-27 08:05:18,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31429520172671427 [2023-08-27 08:05:18,049 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1893 transitions. [2023-08-27 08:05:18,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1893 transitions. [2023-08-27 08:05:18,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:18,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1893 transitions. [2023-08-27 08:05:18,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 99.63157894736842) internal successors, (1893), 19 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:18,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:18,062 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:18,062 INFO L175 Difference]: Start difference. First operand has 62 places, 99 transitions, 726 flow. Second operand 19 states and 1893 transitions. [2023-08-27 08:05:18,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 203 transitions, 2004 flow [2023-08-27 08:05:18,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 203 transitions, 1954 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-27 08:05:18,074 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 978 flow [2023-08-27 08:05:18,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=978, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-08-27 08:05:18,075 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2023-08-27 08:05:18,075 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 978 flow [2023-08-27 08:05:18,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:18,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:18,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:18,084 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 08:05:18,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:18,282 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:18,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:18,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1069472869, now seen corresponding path program 1 times [2023-08-27 08:05:18,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:18,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098996251] [2023-08-27 08:05:18,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:18,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:18,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:18,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098996251] [2023-08-27 08:05:18,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098996251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:18,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498106391] [2023-08-27 08:05:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:18,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:18,939 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 08:05:18,941 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 08:05:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:19,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 08:05:19,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:19,084 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 08:05:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:05:19,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:19,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498106391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:19,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:19,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 08:05:19,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517588565] [2023-08-27 08:05:19,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:19,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:05:19,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:19,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:05:19,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:05:19,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 08:05:19,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 111 transitions, 978 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:19,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:19,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 08:05:19,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:19,355 INFO L124 PetriNetUnfolderBase]: 618/955 cut-off events. [2023-08-27 08:05:19,355 INFO L125 PetriNetUnfolderBase]: For 3891/3934 co-relation queries the response was YES. [2023-08-27 08:05:19,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 955 events. 618/955 cut-off events. For 3891/3934 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3828 event pairs, 24 based on Foata normal form. 151/1017 useless extension candidates. Maximal degree in co-relation 5001. Up to 496 conditions per place. [2023-08-27 08:05:19,364 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 118 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2023-08-27 08:05:19,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 149 transitions, 1599 flow [2023-08-27 08:05:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:19,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2023-08-27 08:05:19,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741324921135647 [2023-08-27 08:05:19,366 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2023-08-27 08:05:19,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2023-08-27 08:05:19,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:19,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2023-08-27 08:05:19,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 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 08:05:19,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:19,370 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:19,370 INFO L175 Difference]: Start difference. First operand has 79 places, 111 transitions, 978 flow. Second operand 5 states and 593 transitions. [2023-08-27 08:05:19,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 149 transitions, 1599 flow [2023-08-27 08:05:19,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 149 transitions, 1384 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-08-27 08:05:19,390 INFO L231 Difference]: Finished difference. Result has 71 places, 116 transitions, 933 flow [2023-08-27 08:05:19,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=933, PETRI_PLACES=71, PETRI_TRANSITIONS=116} [2023-08-27 08:05:19,391 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-08-27 08:05:19,391 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 116 transitions, 933 flow [2023-08-27 08:05:19,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:19,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:19,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:19,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 08:05:19,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:19,600 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:19,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1314907187, now seen corresponding path program 1 times [2023-08-27 08:05:19,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:19,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853691109] [2023-08-27 08:05:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:19,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:19,689 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 08:05:19,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:19,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853691109] [2023-08-27 08:05:19,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853691109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:19,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157573509] [2023-08-27 08:05:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:19,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:19,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:19,691 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 08:05:19,699 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 08:05:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:19,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:05:19,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:19,818 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 08:05:19,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:19,868 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 08:05:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157573509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:19,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 08:05:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566469147] [2023-08-27 08:05:19,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:05:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:05:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:05:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 317 [2023-08-27 08:05:19,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 116 transitions, 933 flow. Second operand has 12 states, 12 states have (on average 121.66666666666667) internal successors, (1460), 12 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:19,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:19,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 317 [2023-08-27 08:05:19,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:20,094 INFO L124 PetriNetUnfolderBase]: 505/820 cut-off events. [2023-08-27 08:05:20,095 INFO L125 PetriNetUnfolderBase]: For 3772/3815 co-relation queries the response was YES. [2023-08-27 08:05:20,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 820 events. 505/820 cut-off events. For 3772/3815 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3389 event pairs, 184 based on Foata normal form. 79/812 useless extension candidates. Maximal degree in co-relation 4351. Up to 695 conditions per place. [2023-08-27 08:05:20,102 INFO L140 encePairwiseOnDemand]: 312/317 looper letters, 105 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2023-08-27 08:05:20,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 116 transitions, 1115 flow [2023-08-27 08:05:20,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:05:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:05:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 763 transitions. [2023-08-27 08:05:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011566771819138 [2023-08-27 08:05:20,105 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 763 transitions. [2023-08-27 08:05:20,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 763 transitions. [2023-08-27 08:05:20,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:20,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 763 transitions. [2023-08-27 08:05:20,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:20,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:20,109 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:20,109 INFO L175 Difference]: Start difference. First operand has 71 places, 116 transitions, 933 flow. Second operand 6 states and 763 transitions. [2023-08-27 08:05:20,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 116 transitions, 1115 flow [2023-08-27 08:05:20,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 1065 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-27 08:05:20,118 INFO L231 Difference]: Finished difference. Result has 72 places, 102 transitions, 802 flow [2023-08-27 08:05:20,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=802, PETRI_PLACES=72, PETRI_TRANSITIONS=102} [2023-08-27 08:05:20,119 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-08-27 08:05:20,119 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 102 transitions, 802 flow [2023-08-27 08:05:20,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.66666666666667) internal successors, (1460), 12 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:20,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:20,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:20,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 08:05:20,325 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,SelfDestructingSolverStorable13 [2023-08-27 08:05:20,326 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:20,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:20,326 INFO L85 PathProgramCache]: Analyzing trace with hash 355628131, now seen corresponding path program 2 times [2023-08-27 08:05:20,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:20,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372719518] [2023-08-27 08:05:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:20,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:20,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:20,766 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 08:05:20,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:20,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372719518] [2023-08-27 08:05:20,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372719518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:20,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99961712] [2023-08-27 08:05:20,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:20,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:20,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:20,769 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 08:05:20,794 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 08:05:20,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:05:20,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:20,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:05:20,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:20,909 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 08:05:20,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99961712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:20,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:20,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-27 08:05:20,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534572123] [2023-08-27 08:05:20,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:20,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:05:20,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:20,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:05:20,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:05:20,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 08:05:20,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 102 transitions, 802 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:20,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:20,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 08:05:20,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:21,119 INFO L124 PetriNetUnfolderBase]: 650/1050 cut-off events. [2023-08-27 08:05:21,119 INFO L125 PetriNetUnfolderBase]: For 4242/4285 co-relation queries the response was YES. [2023-08-27 08:05:21,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 1050 events. 650/1050 cut-off events. For 4242/4285 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4649 event pairs, 66 based on Foata normal form. 73/1040 useless extension candidates. Maximal degree in co-relation 5270. Up to 740 conditions per place. [2023-08-27 08:05:21,128 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 123 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2023-08-27 08:05:21,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 152 transitions, 1504 flow [2023-08-27 08:05:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:21,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 625 transitions. [2023-08-27 08:05:21,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943217665615142 [2023-08-27 08:05:21,131 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 625 transitions. [2023-08-27 08:05:21,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 625 transitions. [2023-08-27 08:05:21,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:21,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 625 transitions. [2023-08-27 08:05:21,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:21,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:21,135 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:21,135 INFO L175 Difference]: Start difference. First operand has 72 places, 102 transitions, 802 flow. Second operand 5 states and 625 transitions. [2023-08-27 08:05:21,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 152 transitions, 1504 flow [2023-08-27 08:05:21,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 1477 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 08:05:21,147 INFO L231 Difference]: Finished difference. Result has 73 places, 112 transitions, 951 flow [2023-08-27 08:05:21,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=951, PETRI_PLACES=73, PETRI_TRANSITIONS=112} [2023-08-27 08:05:21,147 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2023-08-27 08:05:21,147 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 112 transitions, 951 flow [2023-08-27 08:05:21,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:21,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:21,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:21,158 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 08:05:21,353 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,SelfDestructingSolverStorable14 [2023-08-27 08:05:21,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:21,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash 355636780, now seen corresponding path program 1 times [2023-08-27 08:05:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:21,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116505236] [2023-08-27 08:05:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:21,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:21,749 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 08:05:21,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116505236] [2023-08-27 08:05:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116505236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062654886] [2023-08-27 08:05:21,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:21,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:21,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:21,751 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 08:05:21,753 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 08:05:21,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:21,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 08:05:21,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:21,878 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 08:05:21,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:21,923 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 08:05:21,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:21,964 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 08:05:22,064 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 08:05:22,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:22,219 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:22,220 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 29 treesize of output 30 [2023-08-27 08:05:22,228 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:22,229 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 157 treesize of output 141 [2023-08-27 08:05:22,235 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 27 treesize of output 21 [2023-08-27 08:05:22,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-27 08:05:22,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:22,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062654886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:22,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:22,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 08:05:22,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064505499] [2023-08-27 08:05:22,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:22,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:05:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:22,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:05:22,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=310, Unknown=1, NotChecked=0, Total=380 [2023-08-27 08:05:22,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:22,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 112 transitions, 951 flow. Second operand has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:22,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:22,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:22,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:23,312 INFO L124 PetriNetUnfolderBase]: 725/1167 cut-off events. [2023-08-27 08:05:23,312 INFO L125 PetriNetUnfolderBase]: For 4877/4920 co-relation queries the response was YES. [2023-08-27 08:05:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 1167 events. 725/1167 cut-off events. For 4877/4920 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5280 event pairs, 91 based on Foata normal form. 65/1143 useless extension candidates. Maximal degree in co-relation 6258. Up to 742 conditions per place. [2023-08-27 08:05:23,323 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 133 selfloop transitions, 72 changer transitions 0/206 dead transitions. [2023-08-27 08:05:23,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 206 transitions, 2089 flow [2023-08-27 08:05:23,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:05:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:05:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1500 transitions. [2023-08-27 08:05:23,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31545741324921134 [2023-08-27 08:05:23,328 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1500 transitions. [2023-08-27 08:05:23,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1500 transitions. [2023-08-27 08:05:23,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:23,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1500 transitions. [2023-08-27 08:05:23,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 100.0) internal successors, (1500), 15 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 08:05:23,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:23,338 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:23,338 INFO L175 Difference]: Start difference. First operand has 73 places, 112 transitions, 951 flow. Second operand 15 states and 1500 transitions. [2023-08-27 08:05:23,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 206 transitions, 2089 flow [2023-08-27 08:05:23,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 206 transitions, 2045 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 08:05:23,352 INFO L231 Difference]: Finished difference. Result has 88 places, 137 transitions, 1403 flow [2023-08-27 08:05:23,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1403, PETRI_PLACES=88, PETRI_TRANSITIONS=137} [2023-08-27 08:05:23,353 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2023-08-27 08:05:23,353 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 137 transitions, 1403 flow [2023-08-27 08:05:23,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:23,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:23,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:23,362 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 08:05:23,562 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,SelfDestructingSolverStorable15 [2023-08-27 08:05:23,562 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:23,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:23,562 INFO L85 PathProgramCache]: Analyzing trace with hash 355636742, now seen corresponding path program 2 times [2023-08-27 08:05:23,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:23,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243157932] [2023-08-27 08:05:23,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:23,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:23,979 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 08:05:23,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243157932] [2023-08-27 08:05:23,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243157932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:23,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360687491] [2023-08-27 08:05:23,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:23,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:23,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:23,981 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 08:05:23,983 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 08:05:24,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:05:24,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:24,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:05:24,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:24,113 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 08:05:24,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:24,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360687491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:24,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:24,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-27 08:05:24,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051537373] [2023-08-27 08:05:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:05:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:24,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:05:24,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:05:24,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 08:05:24,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 137 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:24,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:24,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 08:05:24,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:24,335 INFO L124 PetriNetUnfolderBase]: 736/1200 cut-off events. [2023-08-27 08:05:24,335 INFO L125 PetriNetUnfolderBase]: For 6647/6690 co-relation queries the response was YES. [2023-08-27 08:05:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7065 conditions, 1200 events. 736/1200 cut-off events. For 6647/6690 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5566 event pairs, 154 based on Foata normal form. 59/1170 useless extension candidates. Maximal degree in co-relation 7031. Up to 1107 conditions per place. [2023-08-27 08:05:24,346 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 123 selfloop transitions, 29 changer transitions 0/153 dead transitions. [2023-08-27 08:05:24,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 153 transitions, 1791 flow [2023-08-27 08:05:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 622 transitions. [2023-08-27 08:05:24,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924290220820189 [2023-08-27 08:05:24,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 622 transitions. [2023-08-27 08:05:24,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 622 transitions. [2023-08-27 08:05:24,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:24,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 622 transitions. [2023-08-27 08:05:24,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:24,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:24,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:24,351 INFO L175 Difference]: Start difference. First operand has 88 places, 137 transitions, 1403 flow. Second operand 5 states and 622 transitions. [2023-08-27 08:05:24,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 153 transitions, 1791 flow [2023-08-27 08:05:24,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 153 transitions, 1691 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-27 08:05:24,370 INFO L231 Difference]: Finished difference. Result has 85 places, 142 transitions, 1456 flow [2023-08-27 08:05:24,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1456, PETRI_PLACES=85, PETRI_TRANSITIONS=142} [2023-08-27 08:05:24,370 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-08-27 08:05:24,371 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 142 transitions, 1456 flow [2023-08-27 08:05:24,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:24,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:24,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:24,379 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 08:05:24,579 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,SelfDestructingSolverStorable16 [2023-08-27 08:05:24,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:24,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash 270289158, now seen corresponding path program 3 times [2023-08-27 08:05:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:24,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785303680] [2023-08-27 08:05:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:24,974 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 08:05:24,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:24,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785303680] [2023-08-27 08:05:24,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785303680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:24,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549996916] [2023-08-27 08:05:24,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:05:24,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:24,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:24,976 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 08:05:24,978 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 08:05:25,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:05:25,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:25,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 08:05:25,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:25,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:25,131 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 08:05:25,165 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 08:05:25,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:25,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549996916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:25,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:25,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 08:05:25,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172068486] [2023-08-27 08:05:25,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:25,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:05:25,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:25,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:05:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:05:25,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 08:05:25,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 142 transitions, 1456 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:25,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:25,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 08:05:25,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:25,459 INFO L124 PetriNetUnfolderBase]: 716/1164 cut-off events. [2023-08-27 08:05:25,459 INFO L125 PetriNetUnfolderBase]: For 6910/6953 co-relation queries the response was YES. [2023-08-27 08:05:25,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 1164 events. 716/1164 cut-off events. For 6910/6953 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5268 event pairs, 127 based on Foata normal form. 59/1182 useless extension candidates. Maximal degree in co-relation 6945. Up to 1035 conditions per place. [2023-08-27 08:05:25,477 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 115 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2023-08-27 08:05:25,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 1777 flow [2023-08-27 08:05:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:25,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-08-27 08:05:25,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36971608832807573 [2023-08-27 08:05:25,479 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-08-27 08:05:25,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-08-27 08:05:25,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:25,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-08-27 08:05:25,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:25,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:25,482 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:25,482 INFO L175 Difference]: Start difference. First operand has 85 places, 142 transitions, 1456 flow. Second operand 5 states and 586 transitions. [2023-08-27 08:05:25,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 1777 flow [2023-08-27 08:05:25,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 151 transitions, 1714 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:25,499 INFO L231 Difference]: Finished difference. Result has 89 places, 142 transitions, 1507 flow [2023-08-27 08:05:25,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1507, PETRI_PLACES=89, PETRI_TRANSITIONS=142} [2023-08-27 08:05:25,500 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2023-08-27 08:05:25,500 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 142 transitions, 1507 flow [2023-08-27 08:05:25,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:25,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:25,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:25,506 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 08:05:25,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 08:05:25,706 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:25,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1314993491, now seen corresponding path program 1 times [2023-08-27 08:05:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:25,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973848972] [2023-08-27 08:05:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:25,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:25,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:25,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973848972] [2023-08-27 08:05:25,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973848972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:25,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:05:25,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:05:25,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584076058] [2023-08-27 08:05:25,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:25,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:05:25,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:25,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:05:25,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:05:25,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 317 [2023-08-27 08:05:25,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 142 transitions, 1507 flow. Second operand has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:25,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:25,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 317 [2023-08-27 08:05:25,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:26,018 INFO L124 PetriNetUnfolderBase]: 815/1361 cut-off events. [2023-08-27 08:05:26,018 INFO L125 PetriNetUnfolderBase]: For 9117/9160 co-relation queries the response was YES. [2023-08-27 08:05:26,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 1361 events. 815/1361 cut-off events. For 9117/9160 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6407 event pairs, 96 based on Foata normal form. 107/1419 useless extension candidates. Maximal degree in co-relation 8322. Up to 900 conditions per place. [2023-08-27 08:05:26,029 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 112 selfloop transitions, 69 changer transitions 8/190 dead transitions. [2023-08-27 08:05:26,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 190 transitions, 2344 flow [2023-08-27 08:05:26,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:05:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:05:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2023-08-27 08:05:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582018927444795 [2023-08-27 08:05:26,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2023-08-27 08:05:26,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2023-08-27 08:05:26,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:26,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2023-08-27 08:05:26,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:26,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:26,034 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:26,034 INFO L175 Difference]: Start difference. First operand has 89 places, 142 transitions, 1507 flow. Second operand 4 states and 581 transitions. [2023-08-27 08:05:26,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 190 transitions, 2344 flow [2023-08-27 08:05:26,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 190 transitions, 2273 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-27 08:05:26,060 INFO L231 Difference]: Finished difference. Result has 92 places, 164 transitions, 2009 flow [2023-08-27 08:05:26,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2009, PETRI_PLACES=92, PETRI_TRANSITIONS=164} [2023-08-27 08:05:26,061 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 59 predicate places. [2023-08-27 08:05:26,062 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 164 transitions, 2009 flow [2023-08-27 08:05:26,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:26,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:26,062 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:26,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-27 08:05:26,063 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:26,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:26,063 INFO L85 PathProgramCache]: Analyzing trace with hash 577946290, now seen corresponding path program 2 times [2023-08-27 08:05:26,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:26,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311230841] [2023-08-27 08:05:26,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:26,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:26,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:26,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311230841] [2023-08-27 08:05:26,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311230841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:26,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758744194] [2023-08-27 08:05:26,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:26,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:26,641 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 08:05:26,646 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 08:05:26,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:05:26,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:26,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:05:26,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:26,772 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 08:05:26,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:26,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758744194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:26,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:26,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-27 08:05:26,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637181278] [2023-08-27 08:05:26,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:26,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:05:26,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:26,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:05:26,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:05:26,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 08:05:26,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 164 transitions, 2009 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:26,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:26,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 08:05:26,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:27,014 INFO L124 PetriNetUnfolderBase]: 801/1332 cut-off events. [2023-08-27 08:05:27,014 INFO L125 PetriNetUnfolderBase]: For 11002/11045 co-relation queries the response was YES. [2023-08-27 08:05:27,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9151 conditions, 1332 events. 801/1332 cut-off events. For 11002/11045 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6225 event pairs, 144 based on Foata normal form. 43/1326 useless extension candidates. Maximal degree in co-relation 9111. Up to 1239 conditions per place. [2023-08-27 08:05:27,026 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 146 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2023-08-27 08:05:27,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 2360 flow [2023-08-27 08:05:27,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2023-08-27 08:05:27,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3905362776025237 [2023-08-27 08:05:27,028 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2023-08-27 08:05:27,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2023-08-27 08:05:27,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:27,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2023-08-27 08:05:27,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:27,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:27,031 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:27,031 INFO L175 Difference]: Start difference. First operand has 92 places, 164 transitions, 2009 flow. Second operand 5 states and 619 transitions. [2023-08-27 08:05:27,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 2360 flow [2023-08-27 08:05:27,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 2273 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-27 08:05:27,062 INFO L231 Difference]: Finished difference. Result has 94 places, 163 transitions, 1959 flow [2023-08-27 08:05:27,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1959, PETRI_PLACES=94, PETRI_TRANSITIONS=163} [2023-08-27 08:05:27,062 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 61 predicate places. [2023-08-27 08:05:27,063 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 163 transitions, 1959 flow [2023-08-27 08:05:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:27,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:27,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:27,075 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 08:05:27,269 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 08:05:27,269 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:27,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:27,270 INFO L85 PathProgramCache]: Analyzing trace with hash 613551340, now seen corresponding path program 3 times [2023-08-27 08:05:27,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:27,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783273621] [2023-08-27 08:05:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:27,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783273621] [2023-08-27 08:05:28,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783273621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413058874] [2023-08-27 08:05:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:05:28,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:28,170 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 08:05:28,194 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 08:05:28,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:05:28,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:28,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:05:28,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:28,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:28,350 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 08:05:28,387 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 08:05:28,387 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:28,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413058874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:28,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:28,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 08:05:28,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746172758] [2023-08-27 08:05:28,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:28,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:05:28,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:05:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:05:28,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 08:05:28,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 163 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:28,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:28,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 08:05:28,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:28,639 INFO L124 PetriNetUnfolderBase]: 794/1321 cut-off events. [2023-08-27 08:05:28,640 INFO L125 PetriNetUnfolderBase]: For 9374/9417 co-relation queries the response was YES. [2023-08-27 08:05:28,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 1321 events. 794/1321 cut-off events. For 9374/9417 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6128 event pairs, 132 based on Foata normal form. 47/1323 useless extension candidates. Maximal degree in co-relation 8622. Up to 1192 conditions per place. [2023-08-27 08:05:28,650 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 140 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2023-08-27 08:05:28,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 170 transitions, 2291 flow [2023-08-27 08:05:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 584 transitions. [2023-08-27 08:05:28,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36845425867507886 [2023-08-27 08:05:28,652 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 584 transitions. [2023-08-27 08:05:28,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 584 transitions. [2023-08-27 08:05:28,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:28,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 584 transitions. [2023-08-27 08:05:28,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:28,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:28,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:28,655 INFO L175 Difference]: Start difference. First operand has 94 places, 163 transitions, 1959 flow. Second operand 5 states and 584 transitions. [2023-08-27 08:05:28,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 170 transitions, 2291 flow [2023-08-27 08:05:28,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 170 transitions, 2231 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 08:05:28,682 INFO L231 Difference]: Finished difference. Result has 93 places, 161 transitions, 1929 flow [2023-08-27 08:05:28,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1929, PETRI_PLACES=93, PETRI_TRANSITIONS=161} [2023-08-27 08:05:28,683 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 60 predicate places. [2023-08-27 08:05:28,683 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 161 transitions, 1929 flow [2023-08-27 08:05:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:28,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:28,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:28,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-27 08:05:28,889 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 08:05:28,889 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:28,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash 605239651, now seen corresponding path program 3 times [2023-08-27 08:05:28,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:28,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087843344] [2023-08-27 08:05:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:29,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087843344] [2023-08-27 08:05:29,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087843344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:29,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200241394] [2023-08-27 08:05:29,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:05:29,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:29,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:29,884 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 08:05:29,907 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 08:05:29,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:05:29,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:29,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:05:29,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:30,057 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 08:05:30,089 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 08:05:30,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:30,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200241394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:30,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:30,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 08:05:30,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500996980] [2023-08-27 08:05:30,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:30,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:05:30,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:30,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:05:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:05:30,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 08:05:30,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 161 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:30,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:30,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 08:05:30,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:30,375 INFO L124 PetriNetUnfolderBase]: 746/1243 cut-off events. [2023-08-27 08:05:30,375 INFO L125 PetriNetUnfolderBase]: For 9090/9133 co-relation queries the response was YES. [2023-08-27 08:05:30,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 1243 events. 746/1243 cut-off events. For 9090/9133 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5700 event pairs, 55 based on Foata normal form. 71/1271 useless extension candidates. Maximal degree in co-relation 8107. Up to 668 conditions per place. [2023-08-27 08:05:30,385 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 135 selfloop transitions, 37 changer transitions 0/173 dead transitions. [2023-08-27 08:05:30,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 173 transitions, 2385 flow [2023-08-27 08:05:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:30,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:30,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-08-27 08:05:30,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722397476340694 [2023-08-27 08:05:30,387 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-08-27 08:05:30,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-08-27 08:05:30,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:30,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-08-27 08:05:30,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:30,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:30,390 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:30,391 INFO L175 Difference]: Start difference. First operand has 93 places, 161 transitions, 1929 flow. Second operand 5 states and 590 transitions. [2023-08-27 08:05:30,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 173 transitions, 2385 flow [2023-08-27 08:05:30,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 173 transitions, 2267 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-08-27 08:05:30,418 INFO L231 Difference]: Finished difference. Result has 90 places, 148 transitions, 1780 flow [2023-08-27 08:05:30,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1780, PETRI_PLACES=90, PETRI_TRANSITIONS=148} [2023-08-27 08:05:30,419 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 57 predicate places. [2023-08-27 08:05:30,419 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 148 transitions, 1780 flow [2023-08-27 08:05:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:30,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:30,420 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:30,429 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 08:05:30,625 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 08:05:30,626 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:30,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1234348629, now seen corresponding path program 1 times [2023-08-27 08:05:30,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:30,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780993674] [2023-08-27 08:05:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:05:30,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780993674] [2023-08-27 08:05:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780993674] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294279205] [2023-08-27 08:05:30,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:30,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:30,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:30,706 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 08:05:30,731 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 08:05:30,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:30,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:05:30,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:30,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:30,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294279205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:30,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:30,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-08-27 08:05:30,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29183254] [2023-08-27 08:05:30,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:30,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:05:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:30,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:05:30,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:05:30,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 317 [2023-08-27 08:05:30,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 148 transitions, 1780 flow. Second operand has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:30,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:30,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 317 [2023-08-27 08:05:30,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:31,441 INFO L124 PetriNetUnfolderBase]: 686/1225 cut-off events. [2023-08-27 08:05:31,441 INFO L125 PetriNetUnfolderBase]: For 8533/8533 co-relation queries the response was YES. [2023-08-27 08:05:31,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7627 conditions, 1225 events. 686/1225 cut-off events. For 8533/8533 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5844 event pairs, 133 based on Foata normal form. 117/1301 useless extension candidates. Maximal degree in co-relation 7589. Up to 561 conditions per place. [2023-08-27 08:05:31,449 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 193 selfloop transitions, 53 changer transitions 4/250 dead transitions. [2023-08-27 08:05:31,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 250 transitions, 3294 flow [2023-08-27 08:05:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:05:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:05:31,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1945 transitions. [2023-08-27 08:05:31,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38347791798107256 [2023-08-27 08:05:31,453 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1945 transitions. [2023-08-27 08:05:31,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1945 transitions. [2023-08-27 08:05:31,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:31,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1945 transitions. [2023-08-27 08:05:31,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 121.5625) internal successors, (1945), 16 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:31,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 317.0) internal successors, (5389), 17 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:31,461 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 317.0) internal successors, (5389), 17 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:31,461 INFO L175 Difference]: Start difference. First operand has 90 places, 148 transitions, 1780 flow. Second operand 16 states and 1945 transitions. [2023-08-27 08:05:31,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 250 transitions, 3294 flow [2023-08-27 08:05:31,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 250 transitions, 3118 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-27 08:05:31,482 INFO L231 Difference]: Finished difference. Result has 102 places, 133 transitions, 1638 flow [2023-08-27 08:05:31,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1638, PETRI_PLACES=102, PETRI_TRANSITIONS=133} [2023-08-27 08:05:31,483 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 69 predicate places. [2023-08-27 08:05:31,483 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 133 transitions, 1638 flow [2023-08-27 08:05:31,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:31,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:31,484 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:31,495 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 08:05:31,689 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 08:05:31,690 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:31,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash 701725194, now seen corresponding path program 4 times [2023-08-27 08:05:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:31,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42946283] [2023-08-27 08:05:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:31,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:32,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:32,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42946283] [2023-08-27 08:05:32,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42946283] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:32,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494705130] [2023-08-27 08:05:32,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:05:32,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:32,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:32,376 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 08:05:32,404 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 08:05:32,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:05:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:32,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 08:05:32,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:32,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:32,589 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:32,589 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 26 treesize of output 18 [2023-08-27 08:05:32,622 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 08:05:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494705130] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:32,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:05:32,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-08-27 08:05:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453328148] [2023-08-27 08:05:32,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:32,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:05:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:05:32,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:05:32,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 08:05:32,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 133 transitions, 1638 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:32,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:32,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 08:05:32,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:32,861 INFO L124 PetriNetUnfolderBase]: 664/1188 cut-off events. [2023-08-27 08:05:32,861 INFO L125 PetriNetUnfolderBase]: For 7994/8032 co-relation queries the response was YES. [2023-08-27 08:05:32,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7508 conditions, 1188 events. 664/1188 cut-off events. For 7994/8032 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5636 event pairs, 142 based on Foata normal form. 36/1187 useless extension candidates. Maximal degree in co-relation 7469. Up to 1116 conditions per place. [2023-08-27 08:05:32,868 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 115 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2023-08-27 08:05:32,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 138 transitions, 1912 flow [2023-08-27 08:05:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:05:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:05:32,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-27 08:05:32,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39274447949526814 [2023-08-27 08:05:32,870 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-27 08:05:32,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-27 08:05:32,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:32,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-27 08:05:32,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:32,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:32,873 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:32,873 INFO L175 Difference]: Start difference. First operand has 102 places, 133 transitions, 1638 flow. Second operand 4 states and 498 transitions. [2023-08-27 08:05:32,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 138 transitions, 1912 flow [2023-08-27 08:05:32,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1750 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-08-27 08:05:32,895 INFO L231 Difference]: Finished difference. Result has 97 places, 132 transitions, 1505 flow [2023-08-27 08:05:32,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1505, PETRI_PLACES=97, PETRI_TRANSITIONS=132} [2023-08-27 08:05:32,896 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-08-27 08:05:32,896 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 132 transitions, 1505 flow [2023-08-27 08:05:32,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:32,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:32,896 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:32,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 08:05:33,101 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 08:05:33,102 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:33,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:33,102 INFO L85 PathProgramCache]: Analyzing trace with hash 577860692, now seen corresponding path program 4 times [2023-08-27 08:05:33,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:33,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491920578] [2023-08-27 08:05:33,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:33,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:33,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491920578] [2023-08-27 08:05:33,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491920578] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:33,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604048324] [2023-08-27 08:05:33,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:05:33,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:33,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:33,621 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 08:05:33,644 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 08:05:33,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:05:33,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:33,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 08:05:33,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:33,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:33,827 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:33,827 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 27 treesize of output 19 [2023-08-27 08:05:33,856 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 08:05:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604048324] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:33,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:05:33,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 5] total 14 [2023-08-27 08:05:33,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782218496] [2023-08-27 08:05:33,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:33,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:05:33,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:33,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:05:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:05:33,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 08:05:33,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 132 transitions, 1505 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:33,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:33,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 08:05:33,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:34,046 INFO L124 PetriNetUnfolderBase]: 638/1158 cut-off events. [2023-08-27 08:05:34,047 INFO L125 PetriNetUnfolderBase]: For 7000/7038 co-relation queries the response was YES. [2023-08-27 08:05:34,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1158 events. 638/1158 cut-off events. For 7000/7038 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5658 event pairs, 50 based on Foata normal form. 36/1177 useless extension candidates. Maximal degree in co-relation 6706. Up to 958 conditions per place. [2023-08-27 08:05:34,054 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 113 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2023-08-27 08:05:34,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 1874 flow [2023-08-27 08:05:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:05:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:05:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2023-08-27 08:05:34,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951104100946372 [2023-08-27 08:05:34,055 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 501 transitions. [2023-08-27 08:05:34,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 501 transitions. [2023-08-27 08:05:34,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:34,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 501 transitions. [2023-08-27 08:05:34,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:34,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:34,058 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:34,058 INFO L175 Difference]: Start difference. First operand has 97 places, 132 transitions, 1505 flow. Second operand 4 states and 501 transitions. [2023-08-27 08:05:34,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 1874 flow [2023-08-27 08:05:34,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 1834 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:05:34,083 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1488 flow [2023-08-27 08:05:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1488, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2023-08-27 08:05:34,084 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-08-27 08:05:34,084 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1488 flow [2023-08-27 08:05:34,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:34,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:34,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:34,091 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 08:05:34,290 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 08:05:34,290 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:34,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:34,290 INFO L85 PathProgramCache]: Analyzing trace with hash 577860451, now seen corresponding path program 4 times [2023-08-27 08:05:34,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:34,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535830598] [2023-08-27 08:05:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:34,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:34,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:34,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535830598] [2023-08-27 08:05:34,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535830598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:34,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013296164] [2023-08-27 08:05:34,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:05:34,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:34,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:34,737 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 08:05:34,772 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 08:05:34,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:05:34,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:34,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 08:05:34,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:34,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:34,971 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:34,971 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 26 treesize of output 18 [2023-08-27 08:05:35,003 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 08:05:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013296164] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:35,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:05:35,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 5] total 14 [2023-08-27 08:05:35,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984317607] [2023-08-27 08:05:35,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:05:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:35,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:05:35,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:05:35,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 08:05:35,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1488 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:35,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 08:05:35,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:35,228 INFO L124 PetriNetUnfolderBase]: 616/1132 cut-off events. [2023-08-27 08:05:35,228 INFO L125 PetriNetUnfolderBase]: For 7240/7278 co-relation queries the response was YES. [2023-08-27 08:05:35,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6633 conditions, 1132 events. 616/1132 cut-off events. For 7240/7278 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5566 event pairs, 50 based on Foata normal form. 36/1167 useless extension candidates. Maximal degree in co-relation 6594. Up to 932 conditions per place. [2023-08-27 08:05:35,236 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 113 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2023-08-27 08:05:35,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 144 transitions, 1864 flow [2023-08-27 08:05:35,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:05:35,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:05:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 500 transitions. [2023-08-27 08:05:35,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943217665615142 [2023-08-27 08:05:35,238 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 500 transitions. [2023-08-27 08:05:35,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 500 transitions. [2023-08-27 08:05:35,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:35,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 500 transitions. [2023-08-27 08:05:35,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,241 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,241 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1488 flow. Second operand 4 states and 500 transitions. [2023-08-27 08:05:35,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 144 transitions, 1864 flow [2023-08-27 08:05:35,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1806 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:05:35,263 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1460 flow [2023-08-27 08:05:35,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1460, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2023-08-27 08:05:35,264 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-08-27 08:05:35,264 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1460 flow [2023-08-27 08:05:35,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:35,264 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-27 08:05:35,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 08:05:35,470 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 08:05:35,470 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:35,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:35,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1610853005, now seen corresponding path program 2 times [2023-08-27 08:05:35,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:35,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893196553] [2023-08-27 08:05:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:35,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:05:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893196553] [2023-08-27 08:05:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893196553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917816353] [2023-08-27 08:05:35,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:35,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:35,561 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 08:05:35,585 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 08:05:35,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:05:35,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:35,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:05:35,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 08:05:35,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:05:35,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917816353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:05:35,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:05:35,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2023-08-27 08:05:35,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750115394] [2023-08-27 08:05:35,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:05:35,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:05:35,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:05:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 08:05:35,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 08:05:35,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1460 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:35,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 08:05:35,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:35,810 INFO L124 PetriNetUnfolderBase]: 570/1049 cut-off events. [2023-08-27 08:05:35,810 INFO L125 PetriNetUnfolderBase]: For 6864/6902 co-relation queries the response was YES. [2023-08-27 08:05:35,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6055 conditions, 1049 events. 570/1049 cut-off events. For 6864/6902 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5129 event pairs, 269 based on Foata normal form. 73/1121 useless extension candidates. Maximal degree in co-relation 6016. Up to 1046 conditions per place. [2023-08-27 08:05:35,815 INFO L140 encePairwiseOnDemand]: 315/317 looper letters, 121 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-08-27 08:05:35,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 124 transitions, 1653 flow [2023-08-27 08:05:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:05:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:05:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-27 08:05:35,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332281808622503 [2023-08-27 08:05:35,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-27 08:05:35,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-27 08:05:35,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:35,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-27 08:05:35,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,822 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1460 flow. Second operand 3 states and 412 transitions. [2023-08-27 08:05:35,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 124 transitions, 1653 flow [2023-08-27 08:05:35,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 124 transitions, 1536 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-27 08:05:35,843 INFO L231 Difference]: Finished difference. Result has 91 places, 124 transitions, 1294 flow [2023-08-27 08:05:35,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1294, PETRI_PLACES=91, PETRI_TRANSITIONS=124} [2023-08-27 08:05:35,843 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 58 predicate places. [2023-08-27 08:05:35,844 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 124 transitions, 1294 flow [2023-08-27 08:05:35,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:35,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:35,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:35,849 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 08:05:36,049 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 08:05:36,050 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:36,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:36,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1731205168, now seen corresponding path program 2 times [2023-08-27 08:05:36,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:36,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426020552] [2023-08-27 08:05:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:36,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:36,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:36,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426020552] [2023-08-27 08:05:36,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426020552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:36,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78470251] [2023-08-27 08:05:36,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:36,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:36,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:36,530 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 08:05:36,545 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 08:05:36,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:05:36,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:36,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-27 08:05:36,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:36,708 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 08:05:36,749 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 08:05:36,791 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 6 treesize of output 5 [2023-08-27 08:05:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:36,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:37,237 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:37,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 84 [2023-08-27 08:05:37,264 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 08:05:37,265 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 243 [2023-08-27 08:05:37,294 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 08:05:37,295 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 220 treesize of output 188 [2023-08-27 08:05:37,317 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 08:05:37,317 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 143 treesize of output 137 [2023-08-27 08:05:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:37,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78470251] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:37,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:37,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-27 08:05:37,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051051219] [2023-08-27 08:05:37,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:37,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:05:37,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:05:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=565, Unknown=2, NotChecked=0, Total=702 [2023-08-27 08:05:37,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:37,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 124 transitions, 1294 flow. Second operand has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:37,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:37,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:37,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:39,304 INFO L124 PetriNetUnfolderBase]: 843/1490 cut-off events. [2023-08-27 08:05:39,304 INFO L125 PetriNetUnfolderBase]: For 7712/7760 co-relation queries the response was YES. [2023-08-27 08:05:39,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8187 conditions, 1490 events. 843/1490 cut-off events. For 7712/7760 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7596 event pairs, 115 based on Foata normal form. 66/1553 useless extension candidates. Maximal degree in co-relation 8152. Up to 900 conditions per place. [2023-08-27 08:05:39,313 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 167 selfloop transitions, 97 changer transitions 2/268 dead transitions. [2023-08-27 08:05:39,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 268 transitions, 2890 flow [2023-08-27 08:05:39,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:05:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:05:39,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2868 transitions. [2023-08-27 08:05:39,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31197650386163384 [2023-08-27 08:05:39,317 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2868 transitions. [2023-08-27 08:05:39,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2868 transitions. [2023-08-27 08:05:39,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:39,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2868 transitions. [2023-08-27 08:05:39,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 98.89655172413794) internal successors, (2868), 29 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:39,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 317.0) internal successors, (9510), 30 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:39,331 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 317.0) internal successors, (9510), 30 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:39,331 INFO L175 Difference]: Start difference. First operand has 91 places, 124 transitions, 1294 flow. Second operand 29 states and 2868 transitions. [2023-08-27 08:05:39,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 268 transitions, 2890 flow [2023-08-27 08:05:39,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 268 transitions, 2889 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:05:39,358 INFO L231 Difference]: Finished difference. Result has 126 places, 179 transitions, 2265 flow [2023-08-27 08:05:39,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2265, PETRI_PLACES=126, PETRI_TRANSITIONS=179} [2023-08-27 08:05:39,359 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2023-08-27 08:05:39,359 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 179 transitions, 2265 flow [2023-08-27 08:05:39,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:39,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:39,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:39,371 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 08:05:39,566 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 08:05:39,566 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:39,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:39,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1462233814, now seen corresponding path program 1 times [2023-08-27 08:05:39,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887613510] [2023-08-27 08:05:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:40,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:40,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:40,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887613510] [2023-08-27 08:05:40,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887613510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:40,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034813278] [2023-08-27 08:05:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:40,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:40,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:40,109 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 08:05:40,132 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 08:05:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:40,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 08:05:40,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:40,291 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:05:40,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:40,343 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 08:05:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:05:40,390 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 08:05:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:40,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:41,155 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:41,155 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 244 treesize of output 161 [2023-08-27 08:05:41,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:41,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 533 treesize of output 502 [2023-08-27 08:05:41,208 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:41,208 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 452 treesize of output 419 [2023-08-27 08:05:41,233 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:41,233 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 400 treesize of output 393 [2023-08-27 08:05:41,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:41,261 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 374 treesize of output 343 [2023-08-27 08:05:41,289 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:41,289 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 324 treesize of output 318 [2023-08-27 08:05:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:43,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034813278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:43,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:43,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 08:05:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529577115] [2023-08-27 08:05:43,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:43,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:05:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:43,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:05:43,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=642, Unknown=1, NotChecked=0, Total=756 [2023-08-27 08:05:43,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:43,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 179 transitions, 2265 flow. Second operand has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 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 08:05:43,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:43,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:43,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:46,672 INFO L124 PetriNetUnfolderBase]: 1150/2004 cut-off events. [2023-08-27 08:05:46,672 INFO L125 PetriNetUnfolderBase]: For 14925/14989 co-relation queries the response was YES. [2023-08-27 08:05:46,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12385 conditions, 2004 events. 1150/2004 cut-off events. For 14925/14989 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11128 event pairs, 160 based on Foata normal form. 86/2088 useless extension candidates. Maximal degree in co-relation 12341. Up to 1254 conditions per place. [2023-08-27 08:05:46,683 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 199 selfloop transitions, 130 changer transitions 4/335 dead transitions. [2023-08-27 08:05:46,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 335 transitions, 4224 flow [2023-08-27 08:05:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 08:05:46,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 08:05:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3058 transitions. [2023-08-27 08:05:46,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31118347410196395 [2023-08-27 08:05:46,687 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3058 transitions. [2023-08-27 08:05:46,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3058 transitions. [2023-08-27 08:05:46,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:46,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3058 transitions. [2023-08-27 08:05:46,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 98.64516129032258) internal successors, (3058), 31 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:46,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:46,699 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:46,699 INFO L175 Difference]: Start difference. First operand has 126 places, 179 transitions, 2265 flow. Second operand 31 states and 3058 transitions. [2023-08-27 08:05:46,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 335 transitions, 4224 flow [2023-08-27 08:05:46,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 335 transitions, 3861 flow, removed 165 selfloop flow, removed 7 redundant places. [2023-08-27 08:05:46,765 INFO L231 Difference]: Finished difference. Result has 158 places, 236 transitions, 3141 flow [2023-08-27 08:05:46,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3141, PETRI_PLACES=158, PETRI_TRANSITIONS=236} [2023-08-27 08:05:46,765 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 125 predicate places. [2023-08-27 08:05:46,766 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 236 transitions, 3141 flow [2023-08-27 08:05:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 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 08:05:46,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:46,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:46,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-27 08:05:46,971 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 08:05:46,972 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:46,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1261855226, now seen corresponding path program 2 times [2023-08-27 08:05:46,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:46,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859655498] [2023-08-27 08:05:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:46,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:47,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859655498] [2023-08-27 08:05:47,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859655498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:47,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589993079] [2023-08-27 08:05:47,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:05:47,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:47,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:47,357 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 08:05:47,369 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 08:05:47,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:05:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:47,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:05:47,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:47,545 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 08:05:47,581 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 08:05:47,611 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 08:05:47,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:47,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:48,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:48,042 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 63 treesize of output 51 [2023-08-27 08:05:48,053 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 08:05:48,054 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 152 treesize of output 140 [2023-08-27 08:05:48,063 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 08:05:48,064 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 109 [2023-08-27 08:05:48,073 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 08:05:48,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 71 [2023-08-27 08:05:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:48,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589993079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:48,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:48,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 08:05:48,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811300990] [2023-08-27 08:05:48,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:48,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:05:48,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:48,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:05:48,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=494, Unknown=2, NotChecked=0, Total=600 [2023-08-27 08:05:48,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:48,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 236 transitions, 3141 flow. Second operand has 25 states, 25 states have (on average 94.44) internal successors, (2361), 25 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:48,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:48,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:48,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:49,456 INFO L124 PetriNetUnfolderBase]: 1155/1999 cut-off events. [2023-08-27 08:05:49,456 INFO L125 PetriNetUnfolderBase]: For 15202/15273 co-relation queries the response was YES. [2023-08-27 08:05:49,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12902 conditions, 1999 events. 1155/1999 cut-off events. For 15202/15273 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10795 event pairs, 306 based on Foata normal form. 72/2054 useless extension candidates. Maximal degree in co-relation 12851. Up to 1333 conditions per place. [2023-08-27 08:05:49,466 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 197 selfloop transitions, 91 changer transitions 4/294 dead transitions. [2023-08-27 08:05:49,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 294 transitions, 4187 flow [2023-08-27 08:05:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:05:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:05:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1689 transitions. [2023-08-27 08:05:49,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3134162182223047 [2023-08-27 08:05:49,469 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1689 transitions. [2023-08-27 08:05:49,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1689 transitions. [2023-08-27 08:05:49,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:49,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1689 transitions. [2023-08-27 08:05:49,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.3529411764706) internal successors, (1689), 17 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:49,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 317.0) internal successors, (5706), 18 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:49,475 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 317.0) internal successors, (5706), 18 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:49,475 INFO L175 Difference]: Start difference. First operand has 158 places, 236 transitions, 3141 flow. Second operand 17 states and 1689 transitions. [2023-08-27 08:05:49,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 294 transitions, 4187 flow [2023-08-27 08:05:49,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 294 transitions, 3699 flow, removed 223 selfloop flow, removed 10 redundant places. [2023-08-27 08:05:49,566 INFO L231 Difference]: Finished difference. Result has 166 places, 248 transitions, 3161 flow [2023-08-27 08:05:49,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3161, PETRI_PLACES=166, PETRI_TRANSITIONS=248} [2023-08-27 08:05:49,566 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2023-08-27 08:05:49,566 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 248 transitions, 3161 flow [2023-08-27 08:05:49,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 94.44) internal successors, (2361), 25 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:49,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:49,567 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:49,572 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 08:05:49,767 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 08:05:49,768 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:49,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:49,768 INFO L85 PathProgramCache]: Analyzing trace with hash -2119440311, now seen corresponding path program 1 times [2023-08-27 08:05:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764904906] [2023-08-27 08:05:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:49,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:05:49,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764904906] [2023-08-27 08:05:49,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764904906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:49,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867951914] [2023-08-27 08:05:49,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:49,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:49,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:49,849 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 08:05:49,871 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 08:05:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:49,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:05:49,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:05:49,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:05:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867951914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:50,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:50,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-27 08:05:50,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321647715] [2023-08-27 08:05:50,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:50,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 08:05:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 08:05:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:05:50,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 317 [2023-08-27 08:05:50,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 248 transitions, 3161 flow. Second operand has 11 states, 11 states have (on average 132.36363636363637) internal successors, (1456), 11 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:50,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:50,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 317 [2023-08-27 08:05:50,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:50,424 INFO L124 PetriNetUnfolderBase]: 1279/2216 cut-off events. [2023-08-27 08:05:50,424 INFO L125 PetriNetUnfolderBase]: For 16890/16956 co-relation queries the response was YES. [2023-08-27 08:05:50,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13475 conditions, 2216 events. 1279/2216 cut-off events. For 16890/16956 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12175 event pairs, 134 based on Foata normal form. 144/2303 useless extension candidates. Maximal degree in co-relation 13421. Up to 809 conditions per place. [2023-08-27 08:05:50,437 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 117 selfloop transitions, 172 changer transitions 13/304 dead transitions. [2023-08-27 08:05:50,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 304 transitions, 4230 flow [2023-08-27 08:05:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:05:50,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:05:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 710 transitions. [2023-08-27 08:05:50,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479495268138801 [2023-08-27 08:05:50,439 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 710 transitions. [2023-08-27 08:05:50,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 710 transitions. [2023-08-27 08:05:50,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:50,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 710 transitions. [2023-08-27 08:05:50,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:50,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:50,441 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:50,442 INFO L175 Difference]: Start difference. First operand has 166 places, 248 transitions, 3161 flow. Second operand 5 states and 710 transitions. [2023-08-27 08:05:50,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 304 transitions, 4230 flow [2023-08-27 08:05:50,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 304 transitions, 4093 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-08-27 08:05:50,508 INFO L231 Difference]: Finished difference. Result has 162 places, 262 transitions, 3641 flow [2023-08-27 08:05:50,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3641, PETRI_PLACES=162, PETRI_TRANSITIONS=262} [2023-08-27 08:05:50,509 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 129 predicate places. [2023-08-27 08:05:50,509 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 262 transitions, 3641 flow [2023-08-27 08:05:50,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.36363636363637) internal successors, (1456), 11 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:50,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:50,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:50,515 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 08:05:50,711 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 08:05:50,711 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:50,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:50,711 INFO L85 PathProgramCache]: Analyzing trace with hash 260853148, now seen corresponding path program 3 times [2023-08-27 08:05:50,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:50,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048619965] [2023-08-27 08:05:50,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:50,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:51,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:51,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048619965] [2023-08-27 08:05:51,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048619965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:51,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731815892] [2023-08-27 08:05:51,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:05:51,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:51,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:51,213 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 08:05:51,214 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 08:05:51,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:05:51,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:51,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:05:51,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:05:51,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:51,518 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 08:05:51,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2023-08-27 08:05:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:05:51,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731815892] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:51,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:51,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-27 08:05:51,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95371826] [2023-08-27 08:05:51,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:51,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:05:51,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:51,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:05:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:05:51,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:05:51,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 262 transitions, 3641 flow. Second operand has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:51,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:51,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:05:51,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:52,920 INFO L124 PetriNetUnfolderBase]: 1797/2998 cut-off events. [2023-08-27 08:05:52,920 INFO L125 PetriNetUnfolderBase]: For 32012/32078 co-relation queries the response was YES. [2023-08-27 08:05:52,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21055 conditions, 2998 events. 1797/2998 cut-off events. For 32012/32078 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16601 event pairs, 178 based on Foata normal form. 134/3073 useless extension candidates. Maximal degree in co-relation 21002. Up to 1690 conditions per place. [2023-08-27 08:05:52,934 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 236 selfloop transitions, 313 changer transitions 4/555 dead transitions. [2023-08-27 08:05:52,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 555 transitions, 8375 flow [2023-08-27 08:05:52,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 08:05:52,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 08:05:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3275 transitions. [2023-08-27 08:05:52,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3332654930294088 [2023-08-27 08:05:52,939 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3275 transitions. [2023-08-27 08:05:52,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3275 transitions. [2023-08-27 08:05:52,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:52,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3275 transitions. [2023-08-27 08:05:52,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.64516129032258) internal successors, (3275), 31 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:52,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:52,950 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:52,950 INFO L175 Difference]: Start difference. First operand has 162 places, 262 transitions, 3641 flow. Second operand 31 states and 3275 transitions. [2023-08-27 08:05:52,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 555 transitions, 8375 flow [2023-08-27 08:05:53,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 555 transitions, 7825 flow, removed 213 selfloop flow, removed 3 redundant places. [2023-08-27 08:05:53,077 INFO L231 Difference]: Finished difference. Result has 193 places, 468 transitions, 7335 flow [2023-08-27 08:05:53,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7335, PETRI_PLACES=193, PETRI_TRANSITIONS=468} [2023-08-27 08:05:53,077 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 160 predicate places. [2023-08-27 08:05:53,077 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 468 transitions, 7335 flow [2023-08-27 08:05:53,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:53,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:53,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:53,083 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 08:05:53,278 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 08:05:53,278 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:53,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:53,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1261841276, now seen corresponding path program 3 times [2023-08-27 08:05:53,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:53,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052386483] [2023-08-27 08:05:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:53,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052386483] [2023-08-27 08:05:53,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052386483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:53,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224299697] [2023-08-27 08:05:53,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:05:53,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:53,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:53,702 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 08:05:53,707 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 08:05:53,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:05:53,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:53,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 08:05:53,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:53,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:54,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:54,025 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 27 treesize of output 19 [2023-08-27 08:05:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:54,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224299697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:54,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:54,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-27 08:05:54,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234506559] [2023-08-27 08:05:54,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:54,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:05:54,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:54,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:05:54,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2023-08-27 08:05:54,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:05:54,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 468 transitions, 7335 flow. Second operand has 24 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:54,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:54,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:05:54,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:55,373 INFO L124 PetriNetUnfolderBase]: 1775/2966 cut-off events. [2023-08-27 08:05:55,373 INFO L125 PetriNetUnfolderBase]: For 26846/26882 co-relation queries the response was YES. [2023-08-27 08:05:55,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22225 conditions, 2966 events. 1775/2966 cut-off events. For 26846/26882 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16316 event pairs, 490 based on Foata normal form. 32/2905 useless extension candidates. Maximal degree in co-relation 22165. Up to 2520 conditions per place. [2023-08-27 08:05:55,391 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 443 selfloop transitions, 57 changer transitions 1/503 dead transitions. [2023-08-27 08:05:55,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 503 transitions, 8340 flow [2023-08-27 08:05:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 08:05:55,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 08:05:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2306 transitions. [2023-08-27 08:05:55,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306567249784915 [2023-08-27 08:05:55,394 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2306 transitions. [2023-08-27 08:05:55,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2306 transitions. [2023-08-27 08:05:55,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:55,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2306 transitions. [2023-08-27 08:05:55,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.81818181818181) internal successors, (2306), 22 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:55,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:55,402 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:55,402 INFO L175 Difference]: Start difference. First operand has 193 places, 468 transitions, 7335 flow. Second operand 22 states and 2306 transitions. [2023-08-27 08:05:55,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 503 transitions, 8340 flow [2023-08-27 08:05:55,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 503 transitions, 7664 flow, removed 312 selfloop flow, removed 7 redundant places. [2023-08-27 08:05:55,598 INFO L231 Difference]: Finished difference. Result has 207 places, 461 transitions, 6662 flow [2023-08-27 08:05:55,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6662, PETRI_PLACES=207, PETRI_TRANSITIONS=461} [2023-08-27 08:05:55,599 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 174 predicate places. [2023-08-27 08:05:55,599 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 461 transitions, 6662 flow [2023-08-27 08:05:55,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:55,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:55,599 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:55,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 08:05:55,800 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 08:05:55,800 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:55,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1261841314, now seen corresponding path program 4 times [2023-08-27 08:05:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360477490] [2023-08-27 08:05:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:05:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:05:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:56,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:05:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360477490] [2023-08-27 08:05:56,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360477490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:05:56,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265928144] [2023-08-27 08:05:56,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:05:56,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:05:56,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:05:56,243 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 08:05:56,246 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 08:05:56,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:05:56,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:05:56,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 08:05:56,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:05:56,405 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 08:05:56,442 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 08:05:56,477 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 08:05:56,512 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 08:05:56,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:56,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:05:57,043 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:57,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 97 [2023-08-27 08:05:57,071 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 08:05:57,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 538 treesize of output 493 [2023-08-27 08:05:57,088 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:05:57,089 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:05:57,097 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:05:57,097 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 164 [2023-08-27 08:05:57,119 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 08:05:57,119 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 169 treesize of output 137 [2023-08-27 08:05:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:05:57,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265928144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:05:57,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:05:57,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 08:05:57,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746104589] [2023-08-27 08:05:57,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:05:57,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:05:57,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:05:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:05:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=596, Unknown=2, NotChecked=0, Total=756 [2023-08-27 08:05:57,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:05:57,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 461 transitions, 6662 flow. Second operand has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 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 08:05:57,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:05:57,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:05:57,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:05:59,605 INFO L124 PetriNetUnfolderBase]: 2067/3376 cut-off events. [2023-08-27 08:05:59,606 INFO L125 PetriNetUnfolderBase]: For 24901/24937 co-relation queries the response was YES. [2023-08-27 08:05:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23950 conditions, 3376 events. 2067/3376 cut-off events. For 24901/24937 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18412 event pairs, 187 based on Foata normal form. 58/3245 useless extension candidates. Maximal degree in co-relation 23890. Up to 2370 conditions per place. [2023-08-27 08:05:59,623 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 379 selfloop transitions, 277 changer transitions 6/664 dead transitions. [2023-08-27 08:05:59,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 664 transitions, 10101 flow [2023-08-27 08:05:59,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:05:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:05:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3136 transitions. [2023-08-27 08:05:59,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30914826498422715 [2023-08-27 08:05:59,628 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3136 transitions. [2023-08-27 08:05:59,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3136 transitions. [2023-08-27 08:05:59,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:05:59,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3136 transitions. [2023-08-27 08:05:59,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 98.0) internal successors, (3136), 32 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:59,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:59,639 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:05:59,639 INFO L175 Difference]: Start difference. First operand has 207 places, 461 transitions, 6662 flow. Second operand 32 states and 3136 transitions. [2023-08-27 08:05:59,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 664 transitions, 10101 flow [2023-08-27 08:05:59,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 664 transitions, 9970 flow, removed 39 selfloop flow, removed 12 redundant places. [2023-08-27 08:05:59,795 INFO L231 Difference]: Finished difference. Result has 232 places, 572 transitions, 9149 flow [2023-08-27 08:05:59,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9149, PETRI_PLACES=232, PETRI_TRANSITIONS=572} [2023-08-27 08:05:59,795 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 199 predicate places. [2023-08-27 08:05:59,795 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 572 transitions, 9149 flow [2023-08-27 08:05:59,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 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 08:05:59,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:05:59,796 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:05:59,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-27 08:05:59,996 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 08:05:59,997 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:05:59,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:05:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1261855264, now seen corresponding path program 5 times [2023-08-27 08:05:59,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:05:59,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445553133] [2023-08-27 08:05:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:05:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:00,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:00,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445553133] [2023-08-27 08:06:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445553133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:00,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769812964] [2023-08-27 08:06:00,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:06:00,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:00,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:00,354 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 08:06:00,356 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 08:06:00,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:06:00,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:00,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:06:00,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:00,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:00,621 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:00,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-08-27 08:06:00,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:00,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769812964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:00,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:00,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-27 08:06:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065224230] [2023-08-27 08:06:00,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:00,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:06:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:06:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:06:00,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:06:00,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 572 transitions, 9149 flow. Second operand has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:00,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:00,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:06:00,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:01,876 INFO L124 PetriNetUnfolderBase]: 1959/3252 cut-off events. [2023-08-27 08:06:01,877 INFO L125 PetriNetUnfolderBase]: For 33079/33115 co-relation queries the response was YES. [2023-08-27 08:06:01,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25507 conditions, 3252 events. 1959/3252 cut-off events. For 33079/33115 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18107 event pairs, 231 based on Foata normal form. 160/3272 useless extension candidates. Maximal degree in co-relation 25439. Up to 1926 conditions per place. [2023-08-27 08:06:01,897 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 349 selfloop transitions, 246 changer transitions 5/602 dead transitions. [2023-08-27 08:06:01,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 602 transitions, 10411 flow [2023-08-27 08:06:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:06:01,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:06:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2114 transitions. [2023-08-27 08:06:01,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33343848580441643 [2023-08-27 08:06:01,900 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2114 transitions. [2023-08-27 08:06:01,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2114 transitions. [2023-08-27 08:06:01,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:01,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2114 transitions. [2023-08-27 08:06:01,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.7) internal successors, (2114), 20 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:01,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 317.0) internal successors, (6657), 21 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:01,905 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 317.0) internal successors, (6657), 21 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:01,905 INFO L175 Difference]: Start difference. First operand has 232 places, 572 transitions, 9149 flow. Second operand 20 states and 2114 transitions. [2023-08-27 08:06:01,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 602 transitions, 10411 flow [2023-08-27 08:06:02,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 602 transitions, 10084 flow, removed 116 selfloop flow, removed 18 redundant places. [2023-08-27 08:06:02,073 INFO L231 Difference]: Finished difference. Result has 234 places, 529 transitions, 8993 flow [2023-08-27 08:06:02,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=7715, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8993, PETRI_PLACES=234, PETRI_TRANSITIONS=529} [2023-08-27 08:06:02,074 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 201 predicate places. [2023-08-27 08:06:02,074 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 529 transitions, 8993 flow [2023-08-27 08:06:02,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:02,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:02,074 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:02,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-27 08:06:02,275 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 08:06:02,275 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:02,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1263509215, now seen corresponding path program 1 times [2023-08-27 08:06:02,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:02,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962788498] [2023-08-27 08:06:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:02,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:02,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962788498] [2023-08-27 08:06:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962788498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:02,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766473543] [2023-08-27 08:06:02,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:02,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:02,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:02,573 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 08:06:02,598 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 08:06:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:02,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 08:06:02,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:02,739 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 08:06:02,772 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 19 treesize of output 18 [2023-08-27 08:06:02,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:02,816 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 08:06:02,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:02,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:06:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:03,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:03,302 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:03,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 79 [2023-08-27 08:06:03,323 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:03,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 205 [2023-08-27 08:06:03,338 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:03,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 116 [2023-08-27 08:06:03,352 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:03,352 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 136 treesize of output 114 [2023-08-27 08:06:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:04,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766473543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:04,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:04,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 08:06:04,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038154861] [2023-08-27 08:06:04,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:04,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:06:04,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:04,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:06:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=602, Unknown=3, NotChecked=0, Total=702 [2023-08-27 08:06:04,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:06:04,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 529 transitions, 8993 flow. Second operand has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:04,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:04,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:06:04,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:06,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:06:08,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:06:10,908 WARN L539 Checker$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 08:06:12,930 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 08:06:14,490 INFO L124 PetriNetUnfolderBase]: 1993/3315 cut-off events. [2023-08-27 08:06:14,490 INFO L125 PetriNetUnfolderBase]: For 37003/37039 co-relation queries the response was YES. [2023-08-27 08:06:14,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26608 conditions, 3315 events. 1993/3315 cut-off events. For 37003/37039 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18574 event pairs, 507 based on Foata normal form. 46/3281 useless extension candidates. Maximal degree in co-relation 26540. Up to 2839 conditions per place. [2023-08-27 08:06:14,509 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 515 selfloop transitions, 83 changer transitions 1/601 dead transitions. [2023-08-27 08:06:14,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 601 transitions, 10573 flow [2023-08-27 08:06:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:06:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:06:14,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2364 transitions. [2023-08-27 08:06:14,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3107255520504732 [2023-08-27 08:06:14,512 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2364 transitions. [2023-08-27 08:06:14,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2364 transitions. [2023-08-27 08:06:14,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:14,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2364 transitions. [2023-08-27 08:06:14,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.5) internal successors, (2364), 24 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:14,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 317.0) internal successors, (7925), 25 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:14,519 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 317.0) internal successors, (7925), 25 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:14,520 INFO L175 Difference]: Start difference. First operand has 234 places, 529 transitions, 8993 flow. Second operand 24 states and 2364 transitions. [2023-08-27 08:06:14,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 601 transitions, 10573 flow [2023-08-27 08:06:14,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 601 transitions, 10290 flow, removed 114 selfloop flow, removed 9 redundant places. [2023-08-27 08:06:14,715 INFO L231 Difference]: Finished difference. Result has 248 places, 542 transitions, 9127 flow [2023-08-27 08:06:14,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9127, PETRI_PLACES=248, PETRI_TRANSITIONS=542} [2023-08-27 08:06:14,716 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 215 predicate places. [2023-08-27 08:06:14,716 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 542 transitions, 9127 flow [2023-08-27 08:06:14,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:14,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:14,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:14,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-27 08:06:14,916 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 08:06:14,917 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:14,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:14,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1263777334, now seen corresponding path program 6 times [2023-08-27 08:06:14,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:14,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127992095] [2023-08-27 08:06:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:15,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:15,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127992095] [2023-08-27 08:06:15,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127992095] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:15,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199855177] [2023-08-27 08:06:15,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:06:15,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:15,490 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 08:06:15,512 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 08:06:15,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:06:15,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:15,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 08:06:15,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:15,688 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 08:06:15,714 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 08:06:15,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:15,781 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 19 treesize of output 21 [2023-08-27 08:06:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:15,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:16,186 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:16,186 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 117 treesize of output 81 [2023-08-27 08:06:16,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:16,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 416 treesize of output 392 [2023-08-27 08:06:16,232 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:16,233 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 140 [2023-08-27 08:06:16,251 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:16,252 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 111 treesize of output 89 [2023-08-27 08:06:16,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:16,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199855177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:16,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:16,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 08:06:16,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508161447] [2023-08-27 08:06:16,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:16,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:06:16,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:16,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:06:16,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=684, Unknown=2, NotChecked=0, Total=812 [2023-08-27 08:06:16,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:06:16,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 542 transitions, 9127 flow. Second operand has 29 states, 29 states have (on average 94.24137931034483) internal successors, (2733), 29 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:16,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:16,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:06:16,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:19,023 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 08:06:27,386 WARN L234 SmtUtils]: Spent 8.12s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:06:29,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:06:31,722 WARN L539 Checker$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 08:06:33,069 INFO L124 PetriNetUnfolderBase]: 2138/3512 cut-off events. [2023-08-27 08:06:33,069 INFO L125 PetriNetUnfolderBase]: For 39532/39568 co-relation queries the response was YES. [2023-08-27 08:06:33,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28071 conditions, 3512 events. 2138/3512 cut-off events. For 39532/39568 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19580 event pairs, 237 based on Foata normal form. 62/3474 useless extension candidates. Maximal degree in co-relation 27998. Up to 2921 conditions per place. [2023-08-27 08:06:33,089 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 523 selfloop transitions, 112 changer transitions 6/643 dead transitions. [2023-08-27 08:06:33,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 643 transitions, 11282 flow [2023-08-27 08:06:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 08:06:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 08:06:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2752 transitions. [2023-08-27 08:06:33,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3100495718792249 [2023-08-27 08:06:33,093 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2752 transitions. [2023-08-27 08:06:33,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2752 transitions. [2023-08-27 08:06:33,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:33,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2752 transitions. [2023-08-27 08:06:33,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:33,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:33,100 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:33,101 INFO L175 Difference]: Start difference. First operand has 248 places, 542 transitions, 9127 flow. Second operand 28 states and 2752 transitions. [2023-08-27 08:06:33,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 643 transitions, 11282 flow [2023-08-27 08:06:33,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 643 transitions, 11154 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-08-27 08:06:33,287 INFO L231 Difference]: Finished difference. Result has 267 places, 555 transitions, 9522 flow [2023-08-27 08:06:33,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9522, PETRI_PLACES=267, PETRI_TRANSITIONS=555} [2023-08-27 08:06:33,287 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 234 predicate places. [2023-08-27 08:06:33,288 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 555 transitions, 9522 flow [2023-08-27 08:06:33,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.24137931034483) internal successors, (2733), 29 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:33,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:33,288 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:33,293 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 08:06:33,488 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 08:06:33,489 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:33,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:33,489 INFO L85 PathProgramCache]: Analyzing trace with hash -417415062, now seen corresponding path program 4 times [2023-08-27 08:06:33,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:33,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718280088] [2023-08-27 08:06:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:33,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:33,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:33,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718280088] [2023-08-27 08:06:33,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718280088] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:33,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001926294] [2023-08-27 08:06:33,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:06:33,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:33,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:33,878 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 08:06:33,880 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 08:06:33,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:06:33,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:33,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:06:33,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:34,064 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 08:06:34,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:34,108 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 08:06:34,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:34,245 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-08-27 08:06:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:34,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:34,691 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:34,692 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 87 treesize of output 63 [2023-08-27 08:06:34,716 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:34,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 166 [2023-08-27 08:06:34,722 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 93 treesize of output 67 [2023-08-27 08:06:34,736 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:34,736 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 64 treesize of output 63 [2023-08-27 08:06:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:35,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001926294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:35,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:35,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 08:06:35,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241456429] [2023-08-27 08:06:35,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:35,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:06:35,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:35,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:06:35,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=654, Unknown=6, NotChecked=0, Total=756 [2023-08-27 08:06:35,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:06:35,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 555 transitions, 9522 flow. Second operand has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 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 08:06:35,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:35,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:06:35,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:37,988 INFO L124 PetriNetUnfolderBase]: 2274/3697 cut-off events. [2023-08-27 08:06:37,988 INFO L125 PetriNetUnfolderBase]: For 45507/45543 co-relation queries the response was YES. [2023-08-27 08:06:38,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30191 conditions, 3697 events. 2274/3697 cut-off events. For 45507/45543 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20666 event pairs, 566 based on Foata normal form. 58/3655 useless extension candidates. Maximal degree in co-relation 30114. Up to 3201 conditions per place. [2023-08-27 08:06:38,019 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 570 selfloop transitions, 77 changer transitions 7/656 dead transitions. [2023-08-27 08:06:38,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 656 transitions, 11705 flow [2023-08-27 08:06:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 08:06:38,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 08:06:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2745 transitions. [2023-08-27 08:06:38,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30926092834610186 [2023-08-27 08:06:38,022 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2745 transitions. [2023-08-27 08:06:38,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2745 transitions. [2023-08-27 08:06:38,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:38,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2745 transitions. [2023-08-27 08:06:38,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 98.03571428571429) internal successors, (2745), 28 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,032 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:38,032 INFO L175 Difference]: Start difference. First operand has 267 places, 555 transitions, 9522 flow. Second operand 28 states and 2745 transitions. [2023-08-27 08:06:38,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 656 transitions, 11705 flow [2023-08-27 08:06:38,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 656 transitions, 11411 flow, removed 100 selfloop flow, removed 10 redundant places. [2023-08-27 08:06:38,313 INFO L231 Difference]: Finished difference. Result has 283 places, 561 transitions, 9595 flow [2023-08-27 08:06:38,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=9194, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9595, PETRI_PLACES=283, PETRI_TRANSITIONS=561} [2023-08-27 08:06:38,314 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 250 predicate places. [2023-08-27 08:06:38,314 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 561 transitions, 9595 flow [2023-08-27 08:06:38,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 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 08:06:38,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:38,314 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:38,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-27 08:06:38,515 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 08:06:38,515 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:38,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:38,515 INFO L85 PathProgramCache]: Analyzing trace with hash 47814428, now seen corresponding path program 5 times [2023-08-27 08:06:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:38,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057701009] [2023-08-27 08:06:38,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:38,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:39,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:39,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057701009] [2023-08-27 08:06:39,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057701009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:39,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541797432] [2023-08-27 08:06:39,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:06:39,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:39,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:39,079 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 08:06:39,081 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 08:06:39,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:06:39,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:39,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:06:39,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:39,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:39,485 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:39,485 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 73 [2023-08-27 08:06:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:39,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541797432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:39,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:39,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2023-08-27 08:06:39,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069890448] [2023-08-27 08:06:39,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:39,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:06:39,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:39,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:06:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-08-27 08:06:39,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:06:39,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 561 transitions, 9595 flow. Second operand has 21 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:39,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:39,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:06:39,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:41,005 INFO L124 PetriNetUnfolderBase]: 2286/3818 cut-off events. [2023-08-27 08:06:41,005 INFO L125 PetriNetUnfolderBase]: For 57922/57958 co-relation queries the response was YES. [2023-08-27 08:06:41,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30702 conditions, 3818 events. 2286/3818 cut-off events. For 57922/57958 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 22349 event pairs, 191 based on Foata normal form. 356/4144 useless extension candidates. Maximal degree in co-relation 30622. Up to 1922 conditions per place. [2023-08-27 08:06:41,035 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 388 selfloop transitions, 294 changer transitions 2/686 dead transitions. [2023-08-27 08:06:41,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 686 transitions, 12300 flow [2023-08-27 08:06:41,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 08:06:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 08:06:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2356 transitions. [2023-08-27 08:06:41,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33782621164324633 [2023-08-27 08:06:41,095 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2356 transitions. [2023-08-27 08:06:41,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2356 transitions. [2023-08-27 08:06:41,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:41,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2356 transitions. [2023-08-27 08:06:41,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.0909090909091) internal successors, (2356), 22 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:41,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:41,101 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:41,101 INFO L175 Difference]: Start difference. First operand has 283 places, 561 transitions, 9595 flow. Second operand 22 states and 2356 transitions. [2023-08-27 08:06:41,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 686 transitions, 12300 flow [2023-08-27 08:06:41,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 686 transitions, 11933 flow, removed 118 selfloop flow, removed 20 redundant places. [2023-08-27 08:06:41,352 INFO L231 Difference]: Finished difference. Result has 284 places, 531 transitions, 9765 flow [2023-08-27 08:06:41,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9765, PETRI_PLACES=284, PETRI_TRANSITIONS=531} [2023-08-27 08:06:41,352 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 251 predicate places. [2023-08-27 08:06:41,352 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 531 transitions, 9765 flow [2023-08-27 08:06:41,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:41,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:41,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:41,358 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 08:06:41,554 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,SelfDestructingSolverStorable38 [2023-08-27 08:06:41,554 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:41,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1266183895, now seen corresponding path program 2 times [2023-08-27 08:06:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:41,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022175498] [2023-08-27 08:06:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:42,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:42,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:42,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022175498] [2023-08-27 08:06:42,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022175498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:42,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61278583] [2023-08-27 08:06:42,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:42,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:42,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:42,100 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 08:06:42,101 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 08:06:42,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:06:42,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:42,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 08:06:42,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:42,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:42,301 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:42,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 08:06:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:06:42,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61278583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:42,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:42,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 4] total 15 [2023-08-27 08:06:42,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555941769] [2023-08-27 08:06:42,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:42,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:06:42,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:06:42,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:06:42,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:06:42,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 531 transitions, 9765 flow. Second operand has 17 states, 17 states have (on average 97.58823529411765) internal successors, (1659), 17 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:42,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:42,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:06:42,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:43,740 INFO L124 PetriNetUnfolderBase]: 2264/3782 cut-off events. [2023-08-27 08:06:43,741 INFO L125 PetriNetUnfolderBase]: For 56082/56106 co-relation queries the response was YES. [2023-08-27 08:06:43,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31162 conditions, 3782 events. 2264/3782 cut-off events. For 56082/56106 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22048 event pairs, 248 based on Foata normal form. 36/3790 useless extension candidates. Maximal degree in co-relation 31076. Up to 2990 conditions per place. [2023-08-27 08:06:43,769 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 389 selfloop transitions, 194 changer transitions 2/587 dead transitions. [2023-08-27 08:06:43,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 587 transitions, 11230 flow [2023-08-27 08:06:43,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:06:43,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:06:43,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1833 transitions. [2023-08-27 08:06:43,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32124079915878023 [2023-08-27 08:06:43,772 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1833 transitions. [2023-08-27 08:06:43,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1833 transitions. [2023-08-27 08:06:43,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:43,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1833 transitions. [2023-08-27 08:06:43,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 101.83333333333333) internal successors, (1833), 18 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:43,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:43,779 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:43,779 INFO L175 Difference]: Start difference. First operand has 284 places, 531 transitions, 9765 flow. Second operand 18 states and 1833 transitions. [2023-08-27 08:06:43,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 587 transitions, 11230 flow [2023-08-27 08:06:44,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 587 transitions, 10728 flow, removed 217 selfloop flow, removed 8 redundant places. [2023-08-27 08:06:44,115 INFO L231 Difference]: Finished difference. Result has 292 places, 543 transitions, 9808 flow [2023-08-27 08:06:44,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=9206, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9808, PETRI_PLACES=292, PETRI_TRANSITIONS=543} [2023-08-27 08:06:44,116 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 259 predicate places. [2023-08-27 08:06:44,116 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 543 transitions, 9808 flow [2023-08-27 08:06:44,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 97.58823529411765) internal successors, (1659), 17 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:44,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:44,117 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:44,122 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 08:06:44,317 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,SelfDestructingSolverStorable39 [2023-08-27 08:06:44,317 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:44,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:44,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1814764885, now seen corresponding path program 2 times [2023-08-27 08:06:44,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:44,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727054451] [2023-08-27 08:06:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:44,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:45,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727054451] [2023-08-27 08:06:45,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727054451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:45,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836798060] [2023-08-27 08:06:45,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:45,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:45,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:45,094 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 08:06:45,095 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 08:06:45,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:06:45,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:45,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 08:06:45,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:45,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:45,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:45,356 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 08:06:45,356 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 27 treesize of output 15 [2023-08-27 08:06:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:45,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836798060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:45,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:45,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 4] total 18 [2023-08-27 08:06:45,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316746777] [2023-08-27 08:06:45,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:45,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:06:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:45,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:06:45,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:06:45,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:06:45,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 543 transitions, 9808 flow. Second operand has 20 states, 20 states have (on average 97.5) internal successors, (1950), 20 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:45,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:45,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:06:45,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:46,788 INFO L124 PetriNetUnfolderBase]: 2547/4233 cut-off events. [2023-08-27 08:06:46,789 INFO L125 PetriNetUnfolderBase]: For 66465/66489 co-relation queries the response was YES. [2023-08-27 08:06:46,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35184 conditions, 4233 events. 2547/4233 cut-off events. For 66465/66489 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25119 event pairs, 149 based on Foata normal form. 66/4269 useless extension candidates. Maximal degree in co-relation 35100. Up to 1419 conditions per place. [2023-08-27 08:06:46,826 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 285 selfloop transitions, 381 changer transitions 0/668 dead transitions. [2023-08-27 08:06:46,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 668 transitions, 12793 flow [2023-08-27 08:06:46,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:06:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:06:46,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1857 transitions. [2023-08-27 08:06:46,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325446898002103 [2023-08-27 08:06:46,829 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1857 transitions. [2023-08-27 08:06:46,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1857 transitions. [2023-08-27 08:06:46,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:46,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1857 transitions. [2023-08-27 08:06:46,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 103.16666666666667) internal successors, (1857), 18 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:46,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:46,835 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:46,835 INFO L175 Difference]: Start difference. First operand has 292 places, 543 transitions, 9808 flow. Second operand 18 states and 1857 transitions. [2023-08-27 08:06:46,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 668 transitions, 12793 flow [2023-08-27 08:06:47,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 668 transitions, 12267 flow, removed 27 selfloop flow, removed 19 redundant places. [2023-08-27 08:06:47,215 INFO L231 Difference]: Finished difference. Result has 292 places, 569 transitions, 11190 flow [2023-08-27 08:06:47,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=9224, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11190, PETRI_PLACES=292, PETRI_TRANSITIONS=569} [2023-08-27 08:06:47,216 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 259 predicate places. [2023-08-27 08:06:47,216 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 569 transitions, 11190 flow [2023-08-27 08:06:47,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.5) internal successors, (1950), 20 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:47,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:47,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:47,221 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 08:06:47,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:47,417 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:47,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:47,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1631455822, now seen corresponding path program 7 times [2023-08-27 08:06:47,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:47,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912663028] [2023-08-27 08:06:47,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:47,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:48,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912663028] [2023-08-27 08:06:48,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912663028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:48,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806140491] [2023-08-27 08:06:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:06:48,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:48,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:48,175 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 08:06:48,177 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 08:06:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:48,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:06:48,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:48,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:48,453 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 30 treesize of output 30 [2023-08-27 08:06:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:48,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:48,627 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1314 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1314) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2023-08-27 08:06:48,684 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:48,684 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 77 [2023-08-27 08:06:48,708 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:48,708 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 18 treesize of output 5 [2023-08-27 08:06:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:48,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806140491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:48,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:48,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-27 08:06:48,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335398725] [2023-08-27 08:06:48,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:48,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:06:48,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:06:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=613, Unknown=1, NotChecked=50, Total=756 [2023-08-27 08:06:48,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:06:48,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 569 transitions, 11190 flow. Second operand has 28 states, 28 states have (on average 97.32142857142857) internal successors, (2725), 28 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:48,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:48,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:06:48,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:51,040 INFO L124 PetriNetUnfolderBase]: 2542/4264 cut-off events. [2023-08-27 08:06:51,040 INFO L125 PetriNetUnfolderBase]: For 84534/84558 co-relation queries the response was YES. [2023-08-27 08:06:51,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37259 conditions, 4264 events. 2542/4264 cut-off events. For 84534/84558 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 25710 event pairs, 115 based on Foata normal form. 194/4428 useless extension candidates. Maximal degree in co-relation 37174. Up to 1785 conditions per place. [2023-08-27 08:06:51,074 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 424 selfloop transitions, 365 changer transitions 1/792 dead transitions. [2023-08-27 08:06:51,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 792 transitions, 15493 flow [2023-08-27 08:06:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 08:06:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 08:06:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2757 transitions. [2023-08-27 08:06:51,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32211706975113913 [2023-08-27 08:06:51,077 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2757 transitions. [2023-08-27 08:06:51,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2757 transitions. [2023-08-27 08:06:51,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:51,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2757 transitions. [2023-08-27 08:06:51,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.11111111111111) internal successors, (2757), 27 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:51,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 317.0) internal successors, (8876), 28 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:51,086 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 317.0) internal successors, (8876), 28 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:51,086 INFO L175 Difference]: Start difference. First operand has 292 places, 569 transitions, 11190 flow. Second operand 27 states and 2757 transitions. [2023-08-27 08:06:51,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 792 transitions, 15493 flow [2023-08-27 08:06:51,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 792 transitions, 15092 flow, removed 186 selfloop flow, removed 5 redundant places. [2023-08-27 08:06:51,507 INFO L231 Difference]: Finished difference. Result has 319 places, 583 transitions, 12082 flow [2023-08-27 08:06:51,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=10548, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12082, PETRI_PLACES=319, PETRI_TRANSITIONS=583} [2023-08-27 08:06:51,507 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 286 predicate places. [2023-08-27 08:06:51,507 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 583 transitions, 12082 flow [2023-08-27 08:06:51,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.32142857142857) internal successors, (2725), 28 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:51,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:51,508 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:51,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:51,708 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,SelfDestructingSolverStorable41 [2023-08-27 08:06:51,709 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:51,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1373793463, now seen corresponding path program 3 times [2023-08-27 08:06:51,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:51,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883193444] [2023-08-27 08:06:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:51,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:52,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883193444] [2023-08-27 08:06:52,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883193444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:52,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116551446] [2023-08-27 08:06:52,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:06:52,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:52,337 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 08:06:52,346 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 08:06:52,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:06:52,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:52,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:06:52,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:52,626 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 19 treesize of output 21 [2023-08-27 08:06:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:52,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:52,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:52,739 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 44 treesize of output 37 [2023-08-27 08:06:52,743 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 10 treesize of output 3 [2023-08-27 08:06:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:52,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116551446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:52,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:52,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 22 [2023-08-27 08:06:52,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460437811] [2023-08-27 08:06:52,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:52,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:06:52,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:52,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:06:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=480, Unknown=4, NotChecked=0, Total=552 [2023-08-27 08:06:52,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 317 [2023-08-27 08:06:52,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 583 transitions, 12082 flow. Second operand has 24 states, 24 states have (on average 88.58333333333333) internal successors, (2126), 24 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:52,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:52,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 317 [2023-08-27 08:06:52,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:54,192 INFO L124 PetriNetUnfolderBase]: 2572/4332 cut-off events. [2023-08-27 08:06:54,192 INFO L125 PetriNetUnfolderBase]: For 72535/72535 co-relation queries the response was YES. [2023-08-27 08:06:54,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38448 conditions, 4332 events. 2572/4332 cut-off events. For 72535/72535 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26315 event pairs, 338 based on Foata normal form. 20/4326 useless extension candidates. Maximal degree in co-relation 38356. Up to 3192 conditions per place. [2023-08-27 08:06:54,231 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 386 selfloop transitions, 234 changer transitions 0/620 dead transitions. [2023-08-27 08:06:54,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 620 transitions, 13479 flow [2023-08-27 08:06:54,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:06:54,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:06:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1405 transitions. [2023-08-27 08:06:54,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29547844374342797 [2023-08-27 08:06:54,233 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1405 transitions. [2023-08-27 08:06:54,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1405 transitions. [2023-08-27 08:06:54,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:54,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1405 transitions. [2023-08-27 08:06:54,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.66666666666667) internal successors, (1405), 15 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,237 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,237 INFO L175 Difference]: Start difference. First operand has 319 places, 583 transitions, 12082 flow. Second operand 15 states and 1405 transitions. [2023-08-27 08:06:54,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 620 transitions, 13479 flow [2023-08-27 08:06:54,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 620 transitions, 12680 flow, removed 161 selfloop flow, removed 15 redundant places. [2023-08-27 08:06:54,676 INFO L231 Difference]: Finished difference. Result has 318 places, 583 transitions, 11836 flow [2023-08-27 08:06:54,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=11213, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11836, PETRI_PLACES=318, PETRI_TRANSITIONS=583} [2023-08-27 08:06:54,677 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 285 predicate places. [2023-08-27 08:06:54,677 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 583 transitions, 11836 flow [2023-08-27 08:06:54,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.58333333333333) internal successors, (2126), 24 states have internal predecessors, (2126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:54,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:54,678 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:54,682 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-27 08:06:54,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:54,878 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:54,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:54,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1814742565, now seen corresponding path program 3 times [2023-08-27 08:06:54,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:54,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102748125] [2023-08-27 08:06:54,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:54,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:55,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:55,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102748125] [2023-08-27 08:06:55,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102748125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:55,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390270253] [2023-08-27 08:06:55,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:06:55,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:55,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:55,498 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 08:06:55,499 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 08:06:55,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:06:55,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:55,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 08:06:55,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:55,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:55,738 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:55,738 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 27 treesize of output 19 [2023-08-27 08:06:55,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:55,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390270253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:55,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2023-08-27 08:06:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577759756] [2023-08-27 08:06:55,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:55,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:06:55,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:06:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:06:55,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:06:55,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 583 transitions, 11836 flow. Second operand has 16 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:55,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:55,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:06:55,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:06:57,181 INFO L124 PetriNetUnfolderBase]: 2571/4315 cut-off events. [2023-08-27 08:06:57,181 INFO L125 PetriNetUnfolderBase]: For 67678/67684 co-relation queries the response was YES. [2023-08-27 08:06:57,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37972 conditions, 4315 events. 2571/4315 cut-off events. For 67678/67684 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 26150 event pairs, 233 based on Foata normal form. 42/4335 useless extension candidates. Maximal degree in co-relation 37881. Up to 3052 conditions per place. [2023-08-27 08:06:57,211 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 379 selfloop transitions, 320 changer transitions 0/701 dead transitions. [2023-08-27 08:06:57,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 701 transitions, 14663 flow [2023-08-27 08:06:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:06:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:06:57,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1885 transitions. [2023-08-27 08:06:57,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3129669599867176 [2023-08-27 08:06:57,213 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1885 transitions. [2023-08-27 08:06:57,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1885 transitions. [2023-08-27 08:06:57,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:06:57,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1885 transitions. [2023-08-27 08:06:57,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 99.21052631578948) internal successors, (1885), 19 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:57,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:57,218 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:57,218 INFO L175 Difference]: Start difference. First operand has 318 places, 583 transitions, 11836 flow. Second operand 19 states and 1885 transitions. [2023-08-27 08:06:57,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 701 transitions, 14663 flow [2023-08-27 08:06:57,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 701 transitions, 14138 flow, removed 73 selfloop flow, removed 16 redundant places. [2023-08-27 08:06:57,738 INFO L231 Difference]: Finished difference. Result has 320 places, 643 transitions, 13039 flow [2023-08-27 08:06:57,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=11255, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13039, PETRI_PLACES=320, PETRI_TRANSITIONS=643} [2023-08-27 08:06:57,739 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 287 predicate places. [2023-08-27 08:06:57,739 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 643 transitions, 13039 flow [2023-08-27 08:06:57,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 94.625) internal successors, (1514), 16 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:06:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:57,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-08-27 08:06:57,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:57,946 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:06:57,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:06:57,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1814742324, now seen corresponding path program 8 times [2023-08-27 08:06:57,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:06:57,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483761961] [2023-08-27 08:06:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:06:57,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:06:57,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:06:58,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:06:58,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:06:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483761961] [2023-08-27 08:06:58,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483761961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:06:58,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024207172] [2023-08-27 08:06:58,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:06:58,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:06:58,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:06:58,680 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 08:06:58,681 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 08:06:58,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:06:58,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:06:58,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 08:06:58,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:06:58,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:06:58,904 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 19 treesize of output 21 [2023-08-27 08:06:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:06:58,997 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:06:59,141 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1430 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1430) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)))) is different from false [2023-08-27 08:06:59,167 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:59,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 98 [2023-08-27 08:06:59,183 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:06:59,184 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 48 treesize of output 46 [2023-08-27 08:06:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:06:59,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024207172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:06:59,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:06:59,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-27 08:06:59,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55401551] [2023-08-27 08:06:59,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:06:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:06:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:06:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:06:59,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=624, Unknown=1, NotChecked=50, Total=756 [2023-08-27 08:06:59,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:06:59,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 643 transitions, 13039 flow. Second operand has 28 states, 28 states have (on average 97.32142857142857) internal successors, (2725), 28 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:06:59,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:06:59,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:06:59,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:01,890 INFO L124 PetriNetUnfolderBase]: 2744/4640 cut-off events. [2023-08-27 08:07:01,890 INFO L125 PetriNetUnfolderBase]: For 75800/75806 co-relation queries the response was YES. [2023-08-27 08:07:01,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40401 conditions, 4640 events. 2744/4640 cut-off events. For 75800/75806 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 28560 event pairs, 204 based on Foata normal form. 68/4686 useless extension candidates. Maximal degree in co-relation 40317. Up to 2182 conditions per place. [2023-08-27 08:07:01,932 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 287 selfloop transitions, 598 changer transitions 0/887 dead transitions. [2023-08-27 08:07:01,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 887 transitions, 17959 flow [2023-08-27 08:07:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 08:07:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 08:07:01,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3649 transitions. [2023-08-27 08:07:01,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31975113915177006 [2023-08-27 08:07:01,937 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3649 transitions. [2023-08-27 08:07:01,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3649 transitions. [2023-08-27 08:07:01,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:01,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3649 transitions. [2023-08-27 08:07:01,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 101.36111111111111) internal successors, (3649), 36 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:01,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 317.0) internal successors, (11729), 37 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:01,948 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 317.0) internal successors, (11729), 37 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:01,948 INFO L175 Difference]: Start difference. First operand has 320 places, 643 transitions, 13039 flow. Second operand 36 states and 3649 transitions. [2023-08-27 08:07:01,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 887 transitions, 17959 flow [2023-08-27 08:07:02,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 887 transitions, 17361 flow, removed 27 selfloop flow, removed 11 redundant places. [2023-08-27 08:07:02,586 INFO L231 Difference]: Finished difference. Result has 355 places, 782 transitions, 16760 flow [2023-08-27 08:07:02,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=12353, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=466, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16760, PETRI_PLACES=355, PETRI_TRANSITIONS=782} [2023-08-27 08:07:02,587 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 322 predicate places. [2023-08-27 08:07:02,587 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 782 transitions, 16760 flow [2023-08-27 08:07:02,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.32142857142857) internal successors, (2725), 28 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:02,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:02,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:02,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-27 08:07:02,788 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,SelfDestructingSolverStorable44 [2023-08-27 08:07:02,788 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:02,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1083353381, now seen corresponding path program 1 times [2023-08-27 08:07:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:02,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519848518] [2023-08-27 08:07:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:02,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:03,082 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 08:07:03,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:03,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519848518] [2023-08-27 08:07:03,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519848518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:07:03,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:07:03,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 08:07:03,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980122746] [2023-08-27 08:07:03,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:07:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:07:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:07:03,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:07:03,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-27 08:07:03,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 782 transitions, 16760 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:03,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:03,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-27 08:07:03,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:04,449 INFO L124 PetriNetUnfolderBase]: 2776/4718 cut-off events. [2023-08-27 08:07:04,450 INFO L125 PetriNetUnfolderBase]: For 81310/81310 co-relation queries the response was YES. [2023-08-27 08:07:04,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44240 conditions, 4718 events. 2776/4718 cut-off events. For 81310/81310 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29202 event pairs, 496 based on Foata normal form. 8/4704 useless extension candidates. Maximal degree in co-relation 44145. Up to 4387 conditions per place. [2023-08-27 08:07:04,489 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 734 selfloop transitions, 34 changer transitions 39/807 dead transitions. [2023-08-27 08:07:04,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 807 transitions, 18491 flow [2023-08-27 08:07:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:07:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:07:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 949 transitions. [2023-08-27 08:07:04,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374211356466877 [2023-08-27 08:07:04,491 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 949 transitions. [2023-08-27 08:07:04,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 949 transitions. [2023-08-27 08:07:04,491 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:04,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 949 transitions. [2023-08-27 08:07:04,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.625) internal successors, (949), 8 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:04,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:04,493 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:04,493 INFO L175 Difference]: Start difference. First operand has 355 places, 782 transitions, 16760 flow. Second operand 8 states and 949 transitions. [2023-08-27 08:07:04,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 807 transitions, 18491 flow [2023-08-27 08:07:05,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 807 transitions, 17968 flow, removed 113 selfloop flow, removed 13 redundant places. [2023-08-27 08:07:05,078 INFO L231 Difference]: Finished difference. Result has 350 places, 751 transitions, 15514 flow [2023-08-27 08:07:05,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=16237, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=748, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15514, PETRI_PLACES=350, PETRI_TRANSITIONS=751} [2023-08-27 08:07:05,080 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 317 predicate places. [2023-08-27 08:07:05,080 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 751 transitions, 15514 flow [2023-08-27 08:07:05,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:05,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:05,080 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:05,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-08-27 08:07:05,080 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:05,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1294915516, now seen corresponding path program 4 times [2023-08-27 08:07:05,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:05,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094707721] [2023-08-27 08:07:05,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:05,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:05,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094707721] [2023-08-27 08:07:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094707721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951389078] [2023-08-27 08:07:05,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:07:05,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:05,497 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 08:07:05,500 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 08:07:05,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:07:05,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:07:05,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:07:05,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:06,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:06,439 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 08:07:06,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 146 treesize of output 128 [2023-08-27 08:07:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951389078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:07,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-27 08:07:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020257942] [2023-08-27 08:07:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:07,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 08:07:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 08:07:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 08:07:07,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:07:07,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 751 transitions, 15514 flow. Second operand has 34 states, 34 states have (on average 101.32352941176471) internal successors, (3445), 34 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:07,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:07,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:07:07,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:12,085 INFO L124 PetriNetUnfolderBase]: 3371/5789 cut-off events. [2023-08-27 08:07:12,086 INFO L125 PetriNetUnfolderBase]: For 131935/131937 co-relation queries the response was YES. [2023-08-27 08:07:12,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55471 conditions, 5789 events. 3371/5789 cut-off events. For 131935/131937 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37659 event pairs, 562 based on Foata normal form. 206/5937 useless extension candidates. Maximal degree in co-relation 55376. Up to 2873 conditions per place. [2023-08-27 08:07:12,141 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 673 selfloop transitions, 446 changer transitions 9/1130 dead transitions. [2023-08-27 08:07:12,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1130 transitions, 24472 flow [2023-08-27 08:07:12,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 08:07:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 08:07:12,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4773 transitions. [2023-08-27 08:07:12,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3345951629863302 [2023-08-27 08:07:12,146 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4773 transitions. [2023-08-27 08:07:12,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4773 transitions. [2023-08-27 08:07:12,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:12,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4773 transitions. [2023-08-27 08:07:12,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 106.06666666666666) internal successors, (4773), 45 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:12,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 317.0) internal successors, (14582), 46 states have internal predecessors, (14582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:12,159 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 317.0) internal successors, (14582), 46 states have internal predecessors, (14582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:12,159 INFO L175 Difference]: Start difference. First operand has 350 places, 751 transitions, 15514 flow. Second operand 45 states and 4773 transitions. [2023-08-27 08:07:12,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1130 transitions, 24472 flow [2023-08-27 08:07:13,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1130 transitions, 23925 flow, removed 189 selfloop flow, removed 19 redundant places. [2023-08-27 08:07:13,297 INFO L231 Difference]: Finished difference. Result has 386 places, 978 transitions, 22465 flow [2023-08-27 08:07:13,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=14418, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=22465, PETRI_PLACES=386, PETRI_TRANSITIONS=978} [2023-08-27 08:07:13,298 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 353 predicate places. [2023-08-27 08:07:13,298 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 978 transitions, 22465 flow [2023-08-27 08:07:13,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 101.32352941176471) internal successors, (3445), 34 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:13,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:13,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:13,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-27 08:07:13,504 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 08:07:13,505 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:13,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:13,505 INFO L85 PathProgramCache]: Analyzing trace with hash -94594483, now seen corresponding path program 2 times [2023-08-27 08:07:13,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:13,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860891827] [2023-08-27 08:07:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:13,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:13,759 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 08:07:13,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860891827] [2023-08-27 08:07:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860891827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:07:13,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:07:13,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 08:07:13,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581447678] [2023-08-27 08:07:13,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:07:13,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:07:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:13,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:07:13,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:07:13,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-27 08:07:13,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 978 transitions, 22465 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-27 08:07:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:15,730 INFO L124 PetriNetUnfolderBase]: 3411/5903 cut-off events. [2023-08-27 08:07:15,730 INFO L125 PetriNetUnfolderBase]: For 145239/145239 co-relation queries the response was YES. [2023-08-27 08:07:15,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59350 conditions, 5903 events. 3411/5903 cut-off events. For 145239/145239 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38679 event pairs, 623 based on Foata normal form. 4/5881 useless extension candidates. Maximal degree in co-relation 59240. Up to 5714 conditions per place. [2023-08-27 08:07:15,784 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 958 selfloop transitions, 38 changer transitions 19/1015 dead transitions. [2023-08-27 08:07:15,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1015 transitions, 25038 flow [2023-08-27 08:07:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:07:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:07:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 945 transitions. [2023-08-27 08:07:15,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37263406940063093 [2023-08-27 08:07:15,785 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 945 transitions. [2023-08-27 08:07:15,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 945 transitions. [2023-08-27 08:07:15,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:15,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 945 transitions. [2023-08-27 08:07:15,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.125) internal successors, (945), 8 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:15,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:15,788 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:15,788 INFO L175 Difference]: Start difference. First operand has 386 places, 978 transitions, 22465 flow. Second operand 8 states and 945 transitions. [2023-08-27 08:07:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1015 transitions, 25038 flow [2023-08-27 08:07:17,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1015 transitions, 22646 flow, removed 1141 selfloop flow, removed 12 redundant places. [2023-08-27 08:07:17,410 INFO L231 Difference]: Finished difference. Result has 384 places, 986 transitions, 20371 flow [2023-08-27 08:07:17,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=20099, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=20371, PETRI_PLACES=384, PETRI_TRANSITIONS=986} [2023-08-27 08:07:17,412 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 351 predicate places. [2023-08-27 08:07:17,412 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 986 transitions, 20371 flow [2023-08-27 08:07:17,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:17,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:17,412 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:17,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-08-27 08:07:17,412 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:17,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash -612014934, now seen corresponding path program 6 times [2023-08-27 08:07:17,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:17,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109575755] [2023-08-27 08:07:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:17,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:18,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109575755] [2023-08-27 08:07:18,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109575755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:18,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991172813] [2023-08-27 08:07:18,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:07:18,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:18,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:18,417 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 08:07:18,420 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 08:07:18,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:07:18,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:07:18,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:07:18,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:18,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:07:18,701 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 19 treesize of output 21 [2023-08-27 08:07:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:07:18,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:18,793 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1541 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1541) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2023-08-27 08:07:18,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:07:18,801 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 41 [2023-08-27 08:07:18,805 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 5 [2023-08-27 08:07:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:07:18,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991172813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:18,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:18,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 26 [2023-08-27 08:07:18,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616096292] [2023-08-27 08:07:18,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:18,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:07:18,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:18,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:07:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=626, Unknown=1, NotChecked=50, Total=756 [2023-08-27 08:07:18,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:07:18,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 986 transitions, 20371 flow. Second operand has 28 states, 28 states have (on average 94.39285714285714) internal successors, (2643), 28 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:18,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:18,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:07:18,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:21,835 INFO L124 PetriNetUnfolderBase]: 3802/6521 cut-off events. [2023-08-27 08:07:21,835 INFO L125 PetriNetUnfolderBase]: For 126893/126893 co-relation queries the response was YES. [2023-08-27 08:07:21,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60310 conditions, 6521 events. 3802/6521 cut-off events. For 126893/126893 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43259 event pairs, 193 based on Foata normal form. 152/6613 useless extension candidates. Maximal degree in co-relation 60198. Up to 2458 conditions per place. [2023-08-27 08:07:21,901 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 585 selfloop transitions, 633 changer transitions 0/1220 dead transitions. [2023-08-27 08:07:21,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 1220 transitions, 26545 flow [2023-08-27 08:07:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:07:21,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:07:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1793 transitions. [2023-08-27 08:07:21,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142306344199089 [2023-08-27 08:07:21,903 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1793 transitions. [2023-08-27 08:07:21,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1793 transitions. [2023-08-27 08:07:21,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:21,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1793 transitions. [2023-08-27 08:07:21,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.61111111111111) internal successors, (1793), 18 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:21,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:21,908 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:21,908 INFO L175 Difference]: Start difference. First operand has 384 places, 986 transitions, 20371 flow. Second operand 18 states and 1793 transitions. [2023-08-27 08:07:21,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 1220 transitions, 26545 flow [2023-08-27 08:07:23,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1220 transitions, 26463 flow, removed 20 selfloop flow, removed 5 redundant places. [2023-08-27 08:07:23,262 INFO L231 Difference]: Finished difference. Result has 394 places, 1035 transitions, 22723 flow [2023-08-27 08:07:23,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=19768, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=562, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22723, PETRI_PLACES=394, PETRI_TRANSITIONS=1035} [2023-08-27 08:07:23,263 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 361 predicate places. [2023-08-27 08:07:23,263 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1035 transitions, 22723 flow [2023-08-27 08:07:23,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.39285714285714) internal successors, (2643), 28 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:23,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:23,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:23,268 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 08:07:23,464 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,SelfDestructingSolverStorable48 [2023-08-27 08:07:23,464 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:23,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:23,465 INFO L85 PathProgramCache]: Analyzing trace with hash -720976849, now seen corresponding path program 3 times [2023-08-27 08:07:23,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357116805] [2023-08-27 08:07:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:23,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:23,731 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 08:07:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357116805] [2023-08-27 08:07:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357116805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:07:23,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:07:23,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 08:07:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639599463] [2023-08-27 08:07:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:07:23,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:07:23,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:07:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:07:23,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-27 08:07:23,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1035 transitions, 22723 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:23,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:23,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-27 08:07:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:25,910 INFO L124 PetriNetUnfolderBase]: 3825/6564 cut-off events. [2023-08-27 08:07:25,910 INFO L125 PetriNetUnfolderBase]: For 125600/125600 co-relation queries the response was YES. [2023-08-27 08:07:25,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62356 conditions, 6564 events. 3825/6564 cut-off events. For 125600/125600 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 43522 event pairs, 690 based on Foata normal form. 4/6508 useless extension candidates. Maximal degree in co-relation 62246. Up to 6371 conditions per place. [2023-08-27 08:07:26,076 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 993 selfloop transitions, 34 changer transitions 21/1048 dead transitions. [2023-08-27 08:07:26,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1048 transitions, 24859 flow [2023-08-27 08:07:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:07:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:07:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 943 transitions. [2023-08-27 08:07:26,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3718454258675079 [2023-08-27 08:07:26,077 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 943 transitions. [2023-08-27 08:07:26,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 943 transitions. [2023-08-27 08:07:26,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:26,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 943 transitions. [2023-08-27 08:07:26,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:26,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:26,079 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:26,080 INFO L175 Difference]: Start difference. First operand has 394 places, 1035 transitions, 22723 flow. Second operand 8 states and 943 transitions. [2023-08-27 08:07:26,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1048 transitions, 24859 flow [2023-08-27 08:07:27,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1048 transitions, 24297 flow, removed 25 selfloop flow, removed 9 redundant places. [2023-08-27 08:07:27,297 INFO L231 Difference]: Finished difference. Result has 394 places, 1023 transitions, 21904 flow [2023-08-27 08:07:27,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=22161, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1001, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=21904, PETRI_PLACES=394, PETRI_TRANSITIONS=1023} [2023-08-27 08:07:27,298 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 361 predicate places. [2023-08-27 08:07:27,298 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1023 transitions, 21904 flow [2023-08-27 08:07:27,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:27,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:27,298 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:27,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-27 08:07:27,299 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:27,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1209818693, now seen corresponding path program 9 times [2023-08-27 08:07:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:27,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773006535] [2023-08-27 08:07:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:27,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:28,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:28,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773006535] [2023-08-27 08:07:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773006535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:28,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124521115] [2023-08-27 08:07:28,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:07:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:28,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:28,315 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 08:07:28,317 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 08:07:28,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:07:28,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:07:28,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 08:07:28,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:07:28,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:28,964 INFO L322 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-27 08:07:28,964 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 82 [2023-08-27 08:07:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:07:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124521115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:29,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:29,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 25 [2023-08-27 08:07:29,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006187960] [2023-08-27 08:07:29,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:29,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:07:29,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:29,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:07:29,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2023-08-27 08:07:29,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:07:29,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1023 transitions, 21904 flow. Second operand has 27 states, 27 states have (on average 94.29629629629629) internal successors, (2546), 27 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:29,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:29,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:07:29,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:34,886 INFO L124 PetriNetUnfolderBase]: 4845/8322 cut-off events. [2023-08-27 08:07:34,886 INFO L125 PetriNetUnfolderBase]: For 201825/201845 co-relation queries the response was YES. [2023-08-27 08:07:34,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79091 conditions, 8322 events. 4845/8322 cut-off events. For 201825/201845 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 57991 event pairs, 625 based on Foata normal form. 164/8404 useless extension candidates. Maximal degree in co-relation 78979. Up to 5096 conditions per place. [2023-08-27 08:07:34,962 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 779 selfloop transitions, 733 changer transitions 8/1524 dead transitions. [2023-08-27 08:07:34,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1524 transitions, 33614 flow [2023-08-27 08:07:34,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-27 08:07:34,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-27 08:07:34,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6617 transitions. [2023-08-27 08:07:34,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3115495079806017 [2023-08-27 08:07:34,968 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6617 transitions. [2023-08-27 08:07:34,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6617 transitions. [2023-08-27 08:07:34,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:34,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6617 transitions. [2023-08-27 08:07:34,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 98.76119402985074) internal successors, (6617), 67 states have internal predecessors, (6617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:34,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 317.0) internal successors, (21556), 68 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:34,989 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 317.0) internal successors, (21556), 68 states have internal predecessors, (21556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:34,989 INFO L175 Difference]: Start difference. First operand has 394 places, 1023 transitions, 21904 flow. Second operand 67 states and 6617 transitions. [2023-08-27 08:07:34,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1524 transitions, 33614 flow [2023-08-27 08:07:36,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1524 transitions, 33517 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-27 08:07:36,568 INFO L231 Difference]: Finished difference. Result has 466 places, 1341 transitions, 31802 flow [2023-08-27 08:07:36,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=21813, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=470, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=31802, PETRI_PLACES=466, PETRI_TRANSITIONS=1341} [2023-08-27 08:07:36,569 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 433 predicate places. [2023-08-27 08:07:36,569 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 1341 transitions, 31802 flow [2023-08-27 08:07:36,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.29629629629629) internal successors, (2546), 27 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:36,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:36,569 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:36,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-27 08:07:36,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:36,770 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:36,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1781095491, now seen corresponding path program 10 times [2023-08-27 08:07:36,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:36,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994393952] [2023-08-27 08:07:36,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:36,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:36,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:37,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:37,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994393952] [2023-08-27 08:07:37,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994393952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:37,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063180341] [2023-08-27 08:07:37,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:07:37,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:37,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:37,624 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 08:07:37,625 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 08:07:37,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:07:37,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:07:37,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 08:07:37,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:38,107 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:38,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:38,353 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 08:07:38,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 104 [2023-08-27 08:07:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:38,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063180341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:38,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:38,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-08-27 08:07:38,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330129442] [2023-08-27 08:07:38,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:38,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 08:07:38,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:38,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 08:07:38,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 08:07:38,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:07:38,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 1341 transitions, 31802 flow. Second operand has 36 states, 36 states have (on average 101.25) internal successors, (3645), 36 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:38,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:38,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:07:38,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:07:49,622 INFO L124 PetriNetUnfolderBase]: 6370/10853 cut-off events. [2023-08-27 08:07:49,622 INFO L125 PetriNetUnfolderBase]: For 255535/255555 co-relation queries the response was YES. [2023-08-27 08:07:49,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107645 conditions, 10853 events. 6370/10853 cut-off events. For 255535/255555 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 75809 event pairs, 941 based on Foata normal form. 294/11093 useless extension candidates. Maximal degree in co-relation 107511. Up to 4948 conditions per place. [2023-08-27 08:07:49,742 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1078 selfloop transitions, 1027 changer transitions 8/2117 dead transitions. [2023-08-27 08:07:49,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 2117 transitions, 49019 flow [2023-08-27 08:07:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-27 08:07:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-27 08:07:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 6261 transitions. [2023-08-27 08:07:49,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34053083868160555 [2023-08-27 08:07:49,748 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 6261 transitions. [2023-08-27 08:07:49,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 6261 transitions. [2023-08-27 08:07:49,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:07:49,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 6261 transitions. [2023-08-27 08:07:49,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 107.94827586206897) internal successors, (6261), 58 states have internal predecessors, (6261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:49,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 317.0) internal successors, (18703), 59 states have internal predecessors, (18703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:49,769 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 317.0) internal successors, (18703), 59 states have internal predecessors, (18703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:49,769 INFO L175 Difference]: Start difference. First operand has 466 places, 1341 transitions, 31802 flow. Second operand 58 states and 6261 transitions. [2023-08-27 08:07:49,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 2117 transitions, 49019 flow [2023-08-27 08:07:52,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 2117 transitions, 46508 flow, removed 1201 selfloop flow, removed 12 redundant places. [2023-08-27 08:07:52,684 INFO L231 Difference]: Finished difference. Result has 527 places, 1913 transitions, 44715 flow [2023-08-27 08:07:52,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=29510, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=784, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=44715, PETRI_PLACES=527, PETRI_TRANSITIONS=1913} [2023-08-27 08:07:52,685 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 494 predicate places. [2023-08-27 08:07:52,685 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 1913 transitions, 44715 flow [2023-08-27 08:07:52,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 101.25) internal successors, (3645), 36 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:52,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:07:52,686 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:07:52,693 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 08:07:52,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:52,892 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:07:52,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:07:52,892 INFO L85 PathProgramCache]: Analyzing trace with hash -568897356, now seen corresponding path program 5 times [2023-08-27 08:07:52,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:07:52,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745917454] [2023-08-27 08:07:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:07:52,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:07:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:07:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:07:53,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:07:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745917454] [2023-08-27 08:07:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745917454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:07:53,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315700286] [2023-08-27 08:07:53,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:07:53,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:07:53,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:07:53,758 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 08:07:53,763 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 08:07:53,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:07:53,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:07:53,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 08:07:53,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:07:54,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:07:54,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:07:54,185 INFO L322 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2023-08-27 08:07:54,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 38 [2023-08-27 08:07:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:07:54,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315700286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:07:54,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:07:54,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 25 [2023-08-27 08:07:54,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606902708] [2023-08-27 08:07:54,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:07:54,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:07:54,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:07:54,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:07:54,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2023-08-27 08:07:54,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 317 [2023-08-27 08:07:54,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 1913 transitions, 44715 flow. Second operand has 27 states, 27 states have (on average 85.4074074074074) internal successors, (2306), 27 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:07:54,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:07:54,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 317 [2023-08-27 08:07:54,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:02,928 INFO L124 PetriNetUnfolderBase]: 7958/13747 cut-off events. [2023-08-27 08:08:02,928 INFO L125 PetriNetUnfolderBase]: For 361194/361194 co-relation queries the response was YES. [2023-08-27 08:08:03,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137606 conditions, 13747 events. 7958/13747 cut-off events. For 361194/361194 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 100455 event pairs, 371 based on Foata normal form. 594/14289 useless extension candidates. Maximal degree in co-relation 137459. Up to 6271 conditions per place. [2023-08-27 08:08:03,096 INFO L140 encePairwiseOnDemand]: 304/317 looper letters, 946 selfloop transitions, 1563 changer transitions 7/2516 dead transitions. [2023-08-27 08:08:03,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 2516 transitions, 62192 flow [2023-08-27 08:08:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 08:08:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 08:08:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3354 transitions. [2023-08-27 08:08:03,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2859578821723932 [2023-08-27 08:08:03,099 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3354 transitions. [2023-08-27 08:08:03,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3354 transitions. [2023-08-27 08:08:03,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:03,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3354 transitions. [2023-08-27 08:08:03,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 90.64864864864865) internal successors, (3354), 37 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:03,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 317.0) internal successors, (12046), 38 states have internal predecessors, (12046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:03,107 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 317.0) internal successors, (12046), 38 states have internal predecessors, (12046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:03,107 INFO L175 Difference]: Start difference. First operand has 527 places, 1913 transitions, 44715 flow. Second operand 37 states and 3354 transitions. [2023-08-27 08:08:03,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 2516 transitions, 62192 flow [2023-08-27 08:08:07,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 2516 transitions, 56904 flow, removed 2579 selfloop flow, removed 12 redundant places. [2023-08-27 08:08:07,463 INFO L231 Difference]: Finished difference. Result has 563 places, 2284 transitions, 55570 flow [2023-08-27 08:08:07,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=39771, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1858, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=55570, PETRI_PLACES=563, PETRI_TRANSITIONS=2284} [2023-08-27 08:08:07,464 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 530 predicate places. [2023-08-27 08:08:07,464 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 2284 transitions, 55570 flow [2023-08-27 08:08:07,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.4074074074074) internal successors, (2306), 27 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:07,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:07,465 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:07,469 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 08:08:07,665 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,SelfDestructingSolverStorable52 [2023-08-27 08:08:07,665 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:08:07,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:07,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1781541612, now seen corresponding path program 4 times [2023-08-27 08:08:07,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:07,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479663887] [2023-08-27 08:08:07,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479663887] [2023-08-27 08:08:08,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479663887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:08,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104046905] [2023-08-27 08:08:08,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:08:08,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:08,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:08,318 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 08:08:08,321 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 08:08:08,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:08:08,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:08,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:08:08,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:08:08,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:08:08,592 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:08:08,593 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 26 treesize of output 18 [2023-08-27 08:08:08,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:08:08,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104046905] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:08:08,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:08:08,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 19 [2023-08-27 08:08:08,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217285809] [2023-08-27 08:08:08,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:08:08,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:08:08,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:08,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:08:08,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-08-27 08:08:08,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:08:08,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 2284 transitions, 55570 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:08,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:08,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:08:08,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:18,282 INFO L124 PetriNetUnfolderBase]: 7872/13658 cut-off events. [2023-08-27 08:08:18,283 INFO L125 PetriNetUnfolderBase]: For 360660/360684 co-relation queries the response was YES. [2023-08-27 08:08:18,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138733 conditions, 13658 events. 7872/13658 cut-off events. For 360660/360684 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 100459 event pairs, 515 based on Foata normal form. 50/13450 useless extension candidates. Maximal degree in co-relation 138571. Up to 9224 conditions per place. [2023-08-27 08:08:18,461 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1337 selfloop transitions, 1042 changer transitions 2/2387 dead transitions. [2023-08-27 08:08:18,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 2387 transitions, 61252 flow [2023-08-27 08:08:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 08:08:18,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 08:08:18,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2963 transitions. [2023-08-27 08:08:18,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33382154123479046 [2023-08-27 08:08:18,463 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2963 transitions. [2023-08-27 08:08:18,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2963 transitions. [2023-08-27 08:08:18,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:18,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2963 transitions. [2023-08-27 08:08:18,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.82142857142857) internal successors, (2963), 28 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:18,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:18,469 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:18,469 INFO L175 Difference]: Start difference. First operand has 563 places, 2284 transitions, 55570 flow. Second operand 28 states and 2963 transitions. [2023-08-27 08:08:18,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 2387 transitions, 61252 flow [2023-08-27 08:08:24,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 2387 transitions, 58307 flow, removed 1403 selfloop flow, removed 9 redundant places. [2023-08-27 08:08:24,423 INFO L231 Difference]: Finished difference. Result has 577 places, 2304 transitions, 55245 flow [2023-08-27 08:08:24,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=52463, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=55245, PETRI_PLACES=577, PETRI_TRANSITIONS=2304} [2023-08-27 08:08:24,425 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 544 predicate places. [2023-08-27 08:08:24,425 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 2304 transitions, 55245 flow [2023-08-27 08:08:24,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:24,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:24,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:24,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-08-27 08:08:24,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:24,626 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:08:24,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:24,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1294901807, now seen corresponding path program 11 times [2023-08-27 08:08:24,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:24,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569711010] [2023-08-27 08:08:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:24,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:25,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:25,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569711010] [2023-08-27 08:08:25,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569711010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:25,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835245554] [2023-08-27 08:08:25,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:08:25,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:25,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:25,290 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:08:25,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-27 08:08:25,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:08:25,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:25,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-27 08:08:25,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:25,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:25,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:08:26,093 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 08:08:26,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 70 treesize of output 104 [2023-08-27 08:08:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:26,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835245554] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:08:26,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:08:26,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 08:08:26,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779393709] [2023-08-27 08:08:26,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:08:26,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:08:26,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:26,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:08:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=983, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 08:08:26,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 08:08:26,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 2304 transitions, 55245 flow. Second operand has 35 states, 35 states have (on average 101.28571428571429) internal successors, (3545), 35 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:26,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:26,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 08:08:26,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:37,923 INFO L124 PetriNetUnfolderBase]: 9055/15748 cut-off events. [2023-08-27 08:08:37,923 INFO L125 PetriNetUnfolderBase]: For 354929/354953 co-relation queries the response was YES. [2023-08-27 08:08:38,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151780 conditions, 15748 events. 9055/15748 cut-off events. For 354929/354953 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 117515 event pairs, 1224 based on Foata normal form. 286/15643 useless extension candidates. Maximal degree in co-relation 151622. Up to 6043 conditions per place. [2023-08-27 08:08:38,107 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1329 selfloop transitions, 1529 changer transitions 9/2873 dead transitions. [2023-08-27 08:08:38,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 2873 transitions, 71347 flow [2023-08-27 08:08:38,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:08:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:08:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3399 transitions. [2023-08-27 08:08:38,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350749211356467 [2023-08-27 08:08:38,110 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3399 transitions. [2023-08-27 08:08:38,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3399 transitions. [2023-08-27 08:08:38,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:08:38,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3399 transitions. [2023-08-27 08:08:38,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 106.21875) internal successors, (3399), 32 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:38,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:38,117 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:38,117 INFO L175 Difference]: Start difference. First operand has 577 places, 2304 transitions, 55245 flow. Second operand 32 states and 3399 transitions. [2023-08-27 08:08:38,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 2873 transitions, 71347 flow [2023-08-27 08:08:43,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 2873 transitions, 68890 flow, removed 79 selfloop flow, removed 23 redundant places. [2023-08-27 08:08:43,294 INFO L231 Difference]: Finished difference. Result has 588 places, 2742 transitions, 65948 flow [2023-08-27 08:08:43,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=52680, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=65948, PETRI_PLACES=588, PETRI_TRANSITIONS=2742} [2023-08-27 08:08:43,295 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 555 predicate places. [2023-08-27 08:08:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 2742 transitions, 65948 flow [2023-08-27 08:08:43,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 101.28571428571429) internal successors, (3545), 35 states have internal predecessors, (3545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:43,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:08:43,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:08:43,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-27 08:08:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-08-27 08:08:43,496 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:08:43,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:08:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash -929095753, now seen corresponding path program 12 times [2023-08-27 08:08:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:08:43,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031128910] [2023-08-27 08:08:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:08:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:08:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:08:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:44,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:08:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031128910] [2023-08-27 08:08:44,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031128910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:08:44,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029870098] [2023-08-27 08:08:44,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:08:44,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:08:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:08:44,284 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:08:44,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-27 08:08:44,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:08:44,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:08:44,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-27 08:08:44,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:08:44,460 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 16 treesize of output 12 [2023-08-27 08:08:44,495 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 16 treesize of output 12 [2023-08-27 08:08:44,536 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 08:08:44,578 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 08:08:44,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:08:44,645 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 08:08:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:44,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:08:45,597 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:08:45,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 142 [2023-08-27 08:08:45,679 INFO L322 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2023-08-27 08:08:45,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 346 [2023-08-27 08:08:45,690 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:08:45,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:08:45,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 226 [2023-08-27 08:08:45,787 INFO L322 Elim1Store]: treesize reduction 10, result has 88.2 percent of original size [2023-08-27 08:08:45,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 177 treesize of output 211 [2023-08-27 08:08:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:08:48,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029870098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:08:48,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:08:48,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-08-27 08:08:48,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951146048] [2023-08-27 08:08:48,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:08:48,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 08:08:48,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:08:48,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 08:08:48,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1261, Unknown=5, NotChecked=0, Total=1482 [2023-08-27 08:08:48,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 317 [2023-08-27 08:08:48,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 2742 transitions, 65948 flow. Second operand has 39 states, 39 states have (on average 85.23076923076923) internal successors, (3324), 39 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:08:48,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:08:48,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 317 [2023-08-27 08:08:48,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:08:50,954 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:09:29,235 WARN L234 SmtUtils]: Spent 32.44s on a formula simplification. DAG size of input: 81 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:09:31,355 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 08:10:04,033 WARN L234 SmtUtils]: Spent 32.30s on a formula simplification. DAG size of input: 63 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:10:36,802 WARN L234 SmtUtils]: Spent 32.37s on a formula simplification. DAG size of input: 74 DAG size of output: 73 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:11:09,387 WARN L234 SmtUtils]: Spent 32.40s on a formula simplification. DAG size of input: 78 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:11:41,899 WARN L234 SmtUtils]: Spent 32.46s on a formula simplification. DAG size of input: 85 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:12:15,648 WARN L234 SmtUtils]: Spent 32.32s on a formula simplification. DAG size of input: 81 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:12:48,175 WARN L234 SmtUtils]: Spent 32.34s on a formula simplification. DAG size of input: 69 DAG size of output: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:13:22,816 WARN L234 SmtUtils]: Spent 32.56s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:13:55,241 WARN L234 SmtUtils]: Spent 32.26s on a formula simplification. DAG size of input: 73 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:14:27,867 WARN L234 SmtUtils]: Spent 32.27s on a formula simplification. DAG size of input: 78 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:14:31,004 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 [1] [2023-08-27 08:14:33,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:14:37,066 WARN L539 Checker$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 08:14:39,380 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 08:14:49,654 INFO L124 PetriNetUnfolderBase]: 10564/18501 cut-off events. [2023-08-27 08:14:49,655 INFO L125 PetriNetUnfolderBase]: For 436845/436845 co-relation queries the response was YES. [2023-08-27 08:14:49,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182742 conditions, 18501 events. 10564/18501 cut-off events. For 436845/436845 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 139174 event pairs, 923 based on Foata normal form. 378/18477 useless extension candidates. Maximal degree in co-relation 182583. Up to 13137 conditions per place. [2023-08-27 08:14:49,893 INFO L140 encePairwiseOnDemand]: 304/317 looper letters, 2355 selfloop transitions, 1280 changer transitions 15/3650 dead transitions. [2023-08-27 08:14:49,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 667 places, 3650 transitions, 92242 flow [2023-08-27 08:14:49,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-27 08:14:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-27 08:14:49,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7658 transitions. [2023-08-27 08:14:49,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28090382217005355 [2023-08-27 08:14:49,898 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7658 transitions. [2023-08-27 08:14:49,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7658 transitions. [2023-08-27 08:14:49,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:14:49,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7658 transitions. [2023-08-27 08:14:49,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 89.04651162790698) internal successors, (7658), 86 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:49,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 317.0) internal successors, (27579), 87 states have internal predecessors, (27579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:49,915 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 317.0) internal successors, (27579), 87 states have internal predecessors, (27579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:49,916 INFO L175 Difference]: Start difference. First operand has 588 places, 2742 transitions, 65948 flow. Second operand 86 states and 7658 transitions. [2023-08-27 08:14:49,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 667 places, 3650 transitions, 92242 flow [2023-08-27 08:14:56,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 3650 transitions, 88457 flow, removed 1817 selfloop flow, removed 18 redundant places. [2023-08-27 08:14:56,914 INFO L231 Difference]: Finished difference. Result has 681 places, 3378 transitions, 83701 flow [2023-08-27 08:14:56,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=61134, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=712, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=83701, PETRI_PLACES=681, PETRI_TRANSITIONS=3378} [2023-08-27 08:14:56,916 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 648 predicate places. [2023-08-27 08:14:56,916 INFO L495 AbstractCegarLoop]: Abstraction has has 681 places, 3378 transitions, 83701 flow [2023-08-27 08:14:56,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.23076923076923) internal successors, (3324), 39 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:56,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:14:56,917 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:14:56,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-08-27 08:14:57,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:14:57,118 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:14:57,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:14:57,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1460770096, now seen corresponding path program 13 times [2023-08-27 08:14:57,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:14:57,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098265701] [2023-08-27 08:14:57,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:14:57,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:14:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:14:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:14:58,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:14:58,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098265701] [2023-08-27 08:14:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098265701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:14:58,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890543601] [2023-08-27 08:14:58,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:14:58,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:14:58,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:14:58,343 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:14:58,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-27 08:14:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:14:58,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 08:14:58,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:14:58,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:14:58,639 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 08:14:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:14:58,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:14:58,949 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:14:58,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 98 [2023-08-27 08:14:58,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:14:58,963 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 48 treesize of output 46 [2023-08-27 08:14:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:14:59,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890543601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:14:59,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:14:59,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2023-08-27 08:14:59,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069583871] [2023-08-27 08:14:59,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:14:59,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:14:59,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:14:59,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:14:59,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=773, Unknown=4, NotChecked=0, Total=870 [2023-08-27 08:14:59,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:14:59,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 681 places, 3378 transitions, 83701 flow. Second operand has 30 states, 30 states have (on average 97.3) internal successors, (2919), 30 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:14:59,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:14:59,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:14:59,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:15:01,792 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 08:15:04,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:15:06,545 WARN L539 Checker$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 08:15:07,328 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset 4)) (.cse3 (select |c_#memory_int| c_~q~0.base)) (.cse2 (+ .cse4 c_~q~0.offset))) (and (forall ((v_ArrVal_1835 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1835) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ (select .cse0 .cse1) (select .cse0 .cse2)) 2147483648)))) (= (select .cse3 .cse1) 1) (<= c_~s~0 0) (= (select .cse3 .cse2) 1)))) is different from false [2023-08-27 08:15:22,753 INFO L124 PetriNetUnfolderBase]: 10932/19107 cut-off events. [2023-08-27 08:15:22,753 INFO L125 PetriNetUnfolderBase]: For 444477/444499 co-relation queries the response was YES. [2023-08-27 08:15:22,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193019 conditions, 19107 events. 10932/19107 cut-off events. For 444477/444499 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 145280 event pairs, 625 based on Foata normal form. 36/18695 useless extension candidates. Maximal degree in co-relation 192829. Up to 16344 conditions per place. [2023-08-27 08:15:23,135 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 2876 selfloop transitions, 733 changer transitions 0/3615 dead transitions. [2023-08-27 08:15:23,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 702 places, 3615 transitions, 95170 flow [2023-08-27 08:15:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 08:15:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 08:15:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2838 transitions. [2023-08-27 08:15:23,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31973862100045064 [2023-08-27 08:15:23,138 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2838 transitions. [2023-08-27 08:15:23,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2838 transitions. [2023-08-27 08:15:23,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:15:23,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2838 transitions. [2023-08-27 08:15:23,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 101.35714285714286) internal successors, (2838), 28 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:15:23,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:15:23,146 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:15:23,146 INFO L175 Difference]: Start difference. First operand has 681 places, 3378 transitions, 83701 flow. Second operand 28 states and 2838 transitions. [2023-08-27 08:15:23,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 702 places, 3615 transitions, 95170 flow [2023-08-27 08:15:32,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 3615 transitions, 91968 flow, removed 1519 selfloop flow, removed 19 redundant places. [2023-08-27 08:15:32,781 INFO L231 Difference]: Finished difference. Result has 690 places, 3478 transitions, 85061 flow [2023-08-27 08:15:32,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=80408, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=641, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=85061, PETRI_PLACES=690, PETRI_TRANSITIONS=3478} [2023-08-27 08:15:32,784 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 657 predicate places. [2023-08-27 08:15:32,784 INFO L495 AbstractCegarLoop]: Abstraction has has 690 places, 3478 transitions, 85061 flow [2023-08-27 08:15:32,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.3) internal successors, (2919), 30 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:15:32,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:15:32,785 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:15:32,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-27 08:15:32,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:15:32,990 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:15:32,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:15:32,991 INFO L85 PathProgramCache]: Analyzing trace with hash 224526211, now seen corresponding path program 14 times [2023-08-27 08:15:32,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:15:32,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051761385] [2023-08-27 08:15:32,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:15:32,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:15:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:15:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:15:33,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:15:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051761385] [2023-08-27 08:15:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051761385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:15:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540349944] [2023-08-27 08:15:33,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:15:33,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:15:33,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:15:33,756 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:15:33,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-27 08:15:33,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:15:33,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:15:33,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-27 08:15:33,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:15:33,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:15:33,923 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:15:33,923 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 15 treesize of output 11 [2023-08-27 08:15:33,950 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 16 treesize of output 12 [2023-08-27 08:15:33,981 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 16 treesize of output 12 [2023-08-27 08:15:34,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:15:34,044 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 08:15:34,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:15:34,114 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 08:15:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:15:34,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:15:37,046 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:15:37,047 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 142 [2023-08-27 08:15:37,092 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:15:37,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 356 [2023-08-27 08:15:37,130 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:15:37,131 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 248 treesize of output 236 [2023-08-27 08:15:37,183 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:15:37,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 177 treesize of output 221 [2023-08-27 08:15:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:15:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540349944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:15:41,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:15:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 08:15:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040809314] [2023-08-27 08:15:41,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:15:41,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 08:15:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:15:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 08:15:41,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1189, Unknown=7, NotChecked=0, Total=1406 [2023-08-27 08:15:41,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 08:15:41,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 690 places, 3478 transitions, 85061 flow. Second operand has 38 states, 38 states have (on average 94.1842105263158) internal successors, (3579), 38 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:15:41,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:15:41,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 08:15:41,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:15:44,034 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 08:15:52,510 WARN L234 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:16:10,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:16:27,055 WARN L539 Checker$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 08:16:32,536 INFO L124 PetriNetUnfolderBase]: 16509/28084 cut-off events. [2023-08-27 08:16:32,536 INFO L125 PetriNetUnfolderBase]: For 622147/622171 co-relation queries the response was YES. [2023-08-27 08:16:33,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272934 conditions, 28084 events. 16509/28084 cut-off events. For 622147/622171 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 211126 event pairs, 1235 based on Foata normal form. 464/27430 useless extension candidates. Maximal degree in co-relation 272741. Up to 17653 conditions per place. [2023-08-27 08:16:33,193 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 3065 selfloop transitions, 2657 changer transitions 14/5742 dead transitions. [2023-08-27 08:16:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 771 places, 5742 transitions, 136754 flow [2023-08-27 08:16:33,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-08-27 08:16:33,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-08-27 08:16:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 8147 transitions. [2023-08-27 08:16:33,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31341848118796645 [2023-08-27 08:16:33,201 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 8147 transitions. [2023-08-27 08:16:33,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 8147 transitions. [2023-08-27 08:16:33,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:16:33,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 8147 transitions. [2023-08-27 08:16:33,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 99.35365853658537) internal successors, (8147), 82 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:16:33,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 317.0) internal successors, (26311), 83 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:16:33,226 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 317.0) internal successors, (26311), 83 states have internal predecessors, (26311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:16:33,227 INFO L175 Difference]: Start difference. First operand has 690 places, 3478 transitions, 85061 flow. Second operand 82 states and 8147 transitions. [2023-08-27 08:16:33,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 771 places, 5742 transitions, 136754 flow [2023-08-27 08:16:47,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 5742 transitions, 135816 flow, removed 140 selfloop flow, removed 12 redundant places. [2023-08-27 08:16:48,010 INFO L231 Difference]: Finished difference. Result has 797 places, 5470 transitions, 133562 flow [2023-08-27 08:16:48,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=84136, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=133562, PETRI_PLACES=797, PETRI_TRANSITIONS=5470} [2023-08-27 08:16:48,012 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 764 predicate places. [2023-08-27 08:16:48,013 INFO L495 AbstractCegarLoop]: Abstraction has has 797 places, 5470 transitions, 133562 flow [2023-08-27 08:16:48,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 94.1842105263158) internal successors, (3579), 38 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:16:48,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:16:48,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:16:48,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-27 08:16:48,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-27 08:16:48,214 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:16:48,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:16:48,214 INFO L85 PathProgramCache]: Analyzing trace with hash -354352575, now seen corresponding path program 6 times [2023-08-27 08:16:48,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:16:48,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060055382] [2023-08-27 08:16:48,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:16:48,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:16:48,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:16:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:16:48,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:16:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060055382] [2023-08-27 08:16:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060055382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:16:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857200478] [2023-08-27 08:16:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:16:48,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:16:48,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:16:48,963 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:16:48,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-27 08:16:49,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:16:49,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:16:49,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:16:49,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:16:49,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:16:49,304 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 19 treesize of output 21 [2023-08-27 08:16:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:16:49,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:16:49,429 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:16:49,429 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 41 [2023-08-27 08:16:49,436 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 5 [2023-08-27 08:16:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:16:49,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857200478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:16:49,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:16:49,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2023-08-27 08:16:49,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455387101] [2023-08-27 08:16:49,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:16:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:16:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:16:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:16:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=615, Unknown=4, NotChecked=0, Total=702 [2023-08-27 08:16:49,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:16:49,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 797 places, 5470 transitions, 133562 flow. Second operand has 27 states, 27 states have (on average 97.44444444444444) internal successors, (2631), 27 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:16:49,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:16:49,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:16:49,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:16:50,130 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset 4))) (and (< 0 (+ (select (select |c_#memory_int| c_~q~0.base) .cse0) 1)) (forall ((v_ArrVal_1927 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1927) c_~q~0.base) .cse0) 1))))) is different from false [2023-08-27 08:17:31,257 INFO L124 PetriNetUnfolderBase]: 17953/30589 cut-off events. [2023-08-27 08:17:31,257 INFO L125 PetriNetUnfolderBase]: For 758874/758898 co-relation queries the response was YES. [2023-08-27 08:17:32,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323688 conditions, 30589 events. 17953/30589 cut-off events. For 758874/758898 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 235349 event pairs, 1180 based on Foata normal form. 8/29657 useless extension candidates. Maximal degree in co-relation 323456. Up to 26348 conditions per place. [2023-08-27 08:17:32,245 INFO L140 encePairwiseOnDemand]: 304/317 looper letters, 5291 selfloop transitions, 835 changer transitions 0/6132 dead transitions. [2023-08-27 08:17:32,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 6132 transitions, 163751 flow [2023-08-27 08:17:32,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:17:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:17:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1937 transitions. [2023-08-27 08:17:32,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321600531296696 [2023-08-27 08:17:32,247 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1937 transitions. [2023-08-27 08:17:32,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1937 transitions. [2023-08-27 08:17:32,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:17:32,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1937 transitions. [2023-08-27 08:17:32,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.94736842105263) internal successors, (1937), 19 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:17:32,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:17:32,251 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:17:32,251 INFO L175 Difference]: Start difference. First operand has 797 places, 5470 transitions, 133562 flow. Second operand 19 states and 1937 transitions. [2023-08-27 08:17:32,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 6132 transitions, 163751 flow [2023-08-27 08:17:57,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 797 places, 6132 transitions, 154489 flow, removed 4469 selfloop flow, removed 18 redundant places. [2023-08-27 08:17:58,079 INFO L231 Difference]: Finished difference. Result has 800 places, 5874 transitions, 140203 flow [2023-08-27 08:17:58,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=124489, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4644, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=140203, PETRI_PLACES=800, PETRI_TRANSITIONS=5874} [2023-08-27 08:17:58,083 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 767 predicate places. [2023-08-27 08:17:58,083 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 5874 transitions, 140203 flow [2023-08-27 08:17:58,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.44444444444444) internal successors, (2631), 27 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:17:58,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:17:58,083 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:17:58,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-27 08:17:58,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-27 08:17:58,284 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 08:17:58,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:17:58,285 INFO L85 PathProgramCache]: Analyzing trace with hash -91333239, now seen corresponding path program 15 times [2023-08-27 08:17:58,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:17:58,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411121600] [2023-08-27 08:17:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:17:58,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:17:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:17:59,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:17:59,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:17:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411121600] [2023-08-27 08:17:59,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411121600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:17:59,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029967940] [2023-08-27 08:17:59,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:17:59,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:17:59,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:17:59,126 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:17:59,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-27 08:17:59,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:17:59,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:17:59,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:17:59,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:17:59,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:17:59,488 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 30 treesize of output 30 [2023-08-27 08:17:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:17:59,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:17:59,787 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1966 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1966) c_~q~0.base))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2023-08-27 08:17:59,872 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:17:59,873 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 127 treesize of output 159 [2023-08-27 08:17:59,892 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:17:59,892 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 56 treesize of output 57 [2023-08-27 08:18:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:18:00,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029967940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:18:00,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:18:00,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 30 [2023-08-27 08:18:00,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119528469] [2023-08-27 08:18:00,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:18:00,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:18:00,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:18:00,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:18:00,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=828, Unknown=1, NotChecked=58, Total=992 [2023-08-27 08:18:00,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 08:18:00,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 5874 transitions, 140203 flow. Second operand has 32 states, 32 states have (on average 97.28125) internal successors, (3113), 32 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:18:00,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:18:00,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 08:18:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:18:15,868 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 08:18:27,715 WARN L234 SmtUtils]: Spent 6.13s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:18:29,760 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] Received shutdown request... [2023-08-27 08:18:30,262 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:18:30,263 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 08:18:30,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-27 08:18:30,264 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 25 remaining) [2023-08-27 08:18:30,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-08-27 08:18:30,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-27 08:18:30,466 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). [2023-08-27 08:18:30,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 25 remaining) [2023-08-27 08:18:30,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (11 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 25 remaining) [2023-08-27 08:18:30,468 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 25 remaining) [2023-08-27 08:18:30,469 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 25 remaining) [2023-08-27 08:18:30,469 INFO L445 BasicCegarLoop]: Path program histogram: [15, 6, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:18:30,473 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 08:18:30,473 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 08:18:30,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 08:18:30 BasicIcfg [2023-08-27 08:18:30,475 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 08:18:30,475 INFO L158 Benchmark]: Toolchain (without parser) took 808625.32ms. Allocated memory was 339.7MB in the beginning and 6.2GB in the end (delta: 5.9GB). Free memory was 297.2MB in the beginning and 3.1GB in the end (delta: -2.8GB). Peak memory consumption was 3.1GB. Max. memory is 16.0GB. [2023-08-27 08:18:30,475 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 339.7MB. Free memory was 317.1MB in the beginning and 317.1MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 08:18:30,475 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.96ms. Allocated memory is still 339.7MB. Free memory was 297.2MB in the beginning and 285.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 08:18:30,476 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.86ms. Allocated memory is still 339.7MB. Free memory was 285.3MB in the beginning and 283.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:18:30,476 INFO L158 Benchmark]: Boogie Preprocessor took 45.90ms. Allocated memory is still 339.7MB. Free memory was 283.2MB in the beginning and 281.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:18:30,476 INFO L158 Benchmark]: RCFGBuilder took 531.54ms. Allocated memory is still 339.7MB. Free memory was 281.1MB in the beginning and 249.6MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-27 08:18:30,476 INFO L158 Benchmark]: TraceAbstraction took 807695.46ms. Allocated memory was 339.7MB in the beginning and 6.2GB in the end (delta: 5.9GB). Free memory was 248.6MB in the beginning and 3.1GB in the end (delta: -2.9GB). Peak memory consumption was 3.0GB. Max. memory is 16.0GB. [2023-08-27 08:18:30,477 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 339.7MB. Free memory was 317.1MB in the beginning and 317.1MB in the end (delta: 91.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 284.96ms. Allocated memory is still 339.7MB. Free memory was 297.2MB in the beginning and 285.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.86ms. Allocated memory is still 339.7MB. Free memory was 285.3MB in the beginning and 283.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 45.90ms. Allocated memory is still 339.7MB. Free memory was 283.2MB in the beginning and 281.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 531.54ms. Allocated memory is still 339.7MB. Free memory was 281.1MB in the beginning and 249.6MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * TraceAbstraction took 807695.46ms. Allocated memory was 339.7MB in the beginning and 6.2GB in the end (delta: 5.9GB). Free memory was 248.6MB in the beginning and 3.1GB in the end (delta: -2.9GB). Peak memory consumption was 3.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.8s, 144 PlacesBefore, 33 PlacesAfterwards, 148 TransitionsBefore, 29 TransitionsAfterwards, 1404 CoEnabledTransitionPairs, 7 FixpointIterations, 89 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 158 TotalNumberOfCompositions, 1888 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1639, independent: 1612, independent conditional: 0, independent unconditional: 1612, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 800, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1639, independent: 825, independent conditional: 0, independent unconditional: 825, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 800, unknown conditional: 0, unknown unconditional: 800] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 43, Positive conditional cache size: 0, Positive unconditional cache size: 43, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 96/317 universal loopers) in iteration 60,while PetriNetUnfolder was constructing finite prefix that currently has 12545 conditions, 917 events (354/916 cut-off events. For 46617/46641 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 8241 event pairs, 24 based on Foata normal form. 0/1256 useless extension candidates. Maximal degree in co-relation 12316. Up to 378 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 188 locations, 25 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: 807.6s, OverallIterations: 60, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 721.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 314 mSolverCounterUnknown, 5137 SdHoareTripleChecker+Valid, 70.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5137 mSDsluCounter, 76 SdHoareTripleChecker+Invalid, 67.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 922 IncrementalHoareTripleChecker+Unchecked, 64 mSDsCounter, 2540 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 38116 IncrementalHoareTripleChecker+Invalid, 41892 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2540 mSolverCounterUnsat, 12 mSDtfsCounter, 38116 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2284 GetRequests, 518 SyntacticMatches, 24 SemanticMatches, 1742 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 19681 ImplicationChecksByTransitivity, 428.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=140203occurred in iteration=59, InterpolantAutomatonStates: 1111, 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: 0.6s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 62.4s InterpolantComputationTime, 1347 NumberOfCodeBlocks, 1319 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 1726 ConstructedInterpolants, 112 QuantifiedInterpolants, 37755 SizeOfPredicates, 456 NumberOfNonLiveVariables, 10086 ConjunctsInSsa, 1361 ConjunctsInUnsatCore, 150 InterpolantComputations, 23 PerfectInterpolantSequences, 280/999 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