/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 13:45:46,637 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 13:45:46,705 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 13:45:46,713 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 13:45:46,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 13:45:46,740 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 13:45:46,740 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 13:45:46,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 13:45:46,741 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 13:45:46,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 13:45:46,744 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 13:45:46,744 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 13:45:46,745 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 13:45:46,746 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 13:45:46,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 13:45:46,747 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 13:45:46,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 13:45:46,748 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 13:45:46,748 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 13:45:46,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 13:45:46,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:45:46,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 13:45:46,749 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 13:45:46,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 13:45:46,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 13:45:46,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 13:45:46,750 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 13:45:46,750 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 13:45:46,750 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 13:45:46,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 13:45:46,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 13:45:46,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 13:45:46,996 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 13:45:46,996 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 13:45:46,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-27 13:45:47,934 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 13:45:48,116 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 13:45:48,117 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-counter-queue2.wvr.c [2023-08-27 13:45:48,121 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e590dbe8/9adecd1b0a7c4b59ad5e8f2507247fe2/FLAG9794af64f [2023-08-27 13:45:48,129 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e590dbe8/9adecd1b0a7c4b59ad5e8f2507247fe2 [2023-08-27 13:45:48,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 13:45:48,132 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 13:45:48,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 13:45:48,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 13:45:48,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 13:45:48,134 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3360bd35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48, skipping insertion in model container [2023-08-27 13:45:48,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,148 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 13:45:48,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:45:48,288 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 13:45:48,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:45:48,325 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 13:45:48,325 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 13:45:48,329 INFO L206 MainTranslator]: Completed translation [2023-08-27 13:45:48,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48 WrapperNode [2023-08-27 13:45:48,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 13:45:48,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 13:45:48,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 13:45:48,330 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 13:45:48,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,369 INFO L138 Inliner]: procedures = 26, calls = 37, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 179 [2023-08-27 13:45:48,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 13:45:48,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 13:45:48,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 13:45:48,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 13:45:48,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,394 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,404 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 13:45:48,406 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 13:45:48,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 13:45:48,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 13:45:48,407 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (1/1) ... [2023-08-27 13:45:48,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:45:48,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:45:48,442 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 13:45:48,467 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 13:45:48,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 13:45:48,478 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 13:45:48,478 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 13:45:48,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 13:45:48,479 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 13:45:48,479 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 13:45:48,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 13:45:48,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 13:45:48,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 13:45:48,481 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 13:45:48,552 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 13:45:48,554 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 13:45:48,863 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 13:45:49,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 13:45:49,075 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 13:45:49,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:45:49 BoogieIcfgContainer [2023-08-27 13:45:49,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 13:45:49,079 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 13:45:49,079 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 13:45:49,081 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 13:45:49,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:45:48" (1/3) ... [2023-08-27 13:45:49,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5dfe36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:45:49, skipping insertion in model container [2023-08-27 13:45:49,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:45:48" (2/3) ... [2023-08-27 13:45:49,082 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5dfe36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:45:49, skipping insertion in model container [2023-08-27 13:45:49,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:45:49" (3/3) ... [2023-08-27 13:45:49,083 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue2.wvr.c [2023-08-27 13:45:49,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 13:45:49,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-27 13:45:49,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 13:45:49,184 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 13:45:49,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 137 transitions, 290 flow [2023-08-27 13:45:49,275 INFO L124 PetriNetUnfolderBase]: 9/135 cut-off events. [2023-08-27 13:45:49,276 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 13:45:49,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 135 events. 9/135 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 182 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-27 13:45:49,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 137 transitions, 290 flow [2023-08-27 13:45:49,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 126 transitions, 264 flow [2023-08-27 13:45:49,291 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 13:45:49,300 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 126 transitions, 264 flow [2023-08-27 13:45:49,303 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 126 transitions, 264 flow [2023-08-27 13:45:49,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 126 transitions, 264 flow [2023-08-27 13:45:49,342 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-08-27 13:45:49,342 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 13:45:49,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 180 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-27 13:45:49,344 INFO L119 LiptonReduction]: Number of co-enabled transitions 1512 [2023-08-27 13:45:57,109 INFO L134 LiptonReduction]: Checked pairs total: 2087 [2023-08-27 13:45:57,110 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-27 13:45:57,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 13:45:57,130 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;@3417e18f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 13:45:57,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-27 13:45:57,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 13:45:57,133 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 13:45:57,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 13:45:57,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:45:57,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 13:45:57,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:45:57,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:45:57,137 INFO L85 PathProgramCache]: Analyzing trace with hash 23727, now seen corresponding path program 1 times [2023-08-27 13:45:57,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:45:57,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708780248] [2023-08-27 13:45:57,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:57,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:45:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:57,354 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 13:45:57,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:45:57,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708780248] [2023-08-27 13:45:57,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708780248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:45:57,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:45:57,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 13:45:57,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504459516] [2023-08-27 13:45:57,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:45:57,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:45:57,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:45:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:45:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:45:57,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 270 [2023-08-27 13:45:57,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:45:57,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 270 [2023-08-27 13:45:57,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:45:57,523 INFO L124 PetriNetUnfolderBase]: 482/687 cut-off events. [2023-08-27 13:45:57,523 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 13:45:57,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1399 conditions, 687 events. 482/687 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 2966 event pairs, 223 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 1263. Up to 678 conditions per place. [2023-08-27 13:45:57,528 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 28 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-08-27 13:45:57,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 140 flow [2023-08-27 13:45:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:45:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:45:57,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-27 13:45:57,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308641975308642 [2023-08-27 13:45:57,539 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-27 13:45:57,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-27 13:45:57,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:45:57,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-27 13:45:57,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,549 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 349 transitions. [2023-08-27 13:45:57,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 140 flow [2023-08-27 13:45:57,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 13:45:57,552 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 87 flow [2023-08-27 13:45:57,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2023-08-27 13:45:57,556 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -5 predicate places. [2023-08-27 13:45:57,556 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 87 flow [2023-08-27 13:45:57,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:45:57,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 13:45:57,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 13:45:57,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:45:57,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:45:57,557 INFO L85 PathProgramCache]: Analyzing trace with hash 736293, now seen corresponding path program 1 times [2023-08-27 13:45:57,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:45:57,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146810136] [2023-08-27 13:45:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:57,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:45:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:57,631 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 13:45:57,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:45:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146810136] [2023-08-27 13:45:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146810136] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:45:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55303231] [2023-08-27 13:45:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:57,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:45:57,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:45:57,634 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 13:45:57,680 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 13:45:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:57,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:45:57,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:45:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:45:57,789 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:45:57,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55303231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:45:57,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:45:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 13:45:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167937306] [2023-08-27 13:45:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:45:57,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:45:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:45:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:45:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:45:57,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 270 [2023-08-27 13:45:57,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 87 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 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 13:45:57,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:45:57,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 270 [2023-08-27 13:45:57,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:45:57,910 INFO L124 PetriNetUnfolderBase]: 482/686 cut-off events. [2023-08-27 13:45:57,910 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 13:45:57,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1385 conditions, 686 events. 482/686 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 2966 event pairs, 223 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 1361. Up to 674 conditions per place. [2023-08-27 13:45:57,913 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 26 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2023-08-27 13:45:57,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 143 flow [2023-08-27 13:45:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:45:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:45:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 447 transitions. [2023-08-27 13:45:57,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41388888888888886 [2023-08-27 13:45:57,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 447 transitions. [2023-08-27 13:45:57,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 447 transitions. [2023-08-27 13:45:57,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:45:57,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 447 transitions. [2023-08-27 13:45:57,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:57,919 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 87 flow. Second operand 4 states and 447 transitions. [2023-08-27 13:45:57,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 143 flow [2023-08-27 13:45:57,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 138 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 13:45:57,920 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 86 flow [2023-08-27 13:45:57,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-27 13:45:57,920 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-27 13:45:57,921 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 86 flow [2023-08-27 13:45:57,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 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 13:45:57,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:45:57,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 13:45:57,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 13:45:58,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:45:58,126 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:45:58,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:45:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash 736294, now seen corresponding path program 1 times [2023-08-27 13:45:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:45:58,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590862684] [2023-08-27 13:45:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:58,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:45:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:58,175 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 13:45:58,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:45:58,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590862684] [2023-08-27 13:45:58,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590862684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:45:58,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95909538] [2023-08-27 13:45:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:58,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:45:58,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:45:58,201 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 13:45:58,202 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 13:45:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:58,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:45:58,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:45:58,289 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 13:45:58,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:45:58,304 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 13:45:58,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95909538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:45:58,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:45:58,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 13:45:58,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841942307] [2023-08-27 13:45:58,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:45:58,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 13:45:58,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:45:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 13:45:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 13:45:58,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 270 [2023-08-27 13:45:58,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 86 flow. Second operand has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:45:58,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 270 [2023-08-27 13:45:58,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:45:58,417 INFO L124 PetriNetUnfolderBase]: 485/692 cut-off events. [2023-08-27 13:45:58,417 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 13:45:58,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1407 conditions, 692 events. 485/692 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 2947 event pairs, 223 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 1361. Up to 680 conditions per place. [2023-08-27 13:45:58,420 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 27 selfloop transitions, 9 changer transitions 0/38 dead transitions. [2023-08-27 13:45:58,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 188 flow [2023-08-27 13:45:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:45:58,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:45:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 663 transitions. [2023-08-27 13:45:58,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40925925925925927 [2023-08-27 13:45:58,422 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 663 transitions. [2023-08-27 13:45:58,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 663 transitions. [2023-08-27 13:45:58,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:45:58,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 663 transitions. [2023-08-27 13:45:58,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,426 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,426 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 86 flow. Second operand 6 states and 663 transitions. [2023-08-27 13:45:58,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 188 flow [2023-08-27 13:45:58,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 38 transitions, 179 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:45:58,428 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 144 flow [2023-08-27 13:45:58,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=144, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-27 13:45:58,428 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-27 13:45:58,429 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 144 flow [2023-08-27 13:45:58,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 105.14285714285714) internal successors, (736), 7 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:45:58,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 13:45:58,439 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 13:45:58,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 13:45:58,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:45:58,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:45:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash 707601452, now seen corresponding path program 1 times [2023-08-27 13:45:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:45:58,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566146813] [2023-08-27 13:45:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:45:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:58,692 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 13:45:58,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:45:58,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566146813] [2023-08-27 13:45:58,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566146813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:45:58,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:45:58,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:45:58,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028102172] [2023-08-27 13:45:58,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:45:58,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:45:58,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:45:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:45:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:45:58,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 270 [2023-08-27 13:45:58,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:45:58,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 270 [2023-08-27 13:45:58,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:45:58,842 INFO L124 PetriNetUnfolderBase]: 627/934 cut-off events. [2023-08-27 13:45:58,842 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 13:45:58,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 934 events. 627/934 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 4428 event pairs, 151 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 1883. Up to 618 conditions per place. [2023-08-27 13:45:58,848 INFO L140 encePairwiseOnDemand]: 265/270 looper letters, 51 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2023-08-27 13:45:58,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 287 flow [2023-08-27 13:45:58,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:45:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:45:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-27 13:45:58,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2023-08-27 13:45:58,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-27 13:45:58,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-27 13:45:58,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:45:58,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-27 13:45:58,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,851 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 144 flow. Second operand 3 states and 366 transitions. [2023-08-27 13:45:58,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 287 flow [2023-08-27 13:45:58,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 55 transitions, 266 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 13:45:58,854 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 144 flow [2023-08-27 13:45:58,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-27 13:45:58,856 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-27 13:45:58,858 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 144 flow [2023-08-27 13:45:58,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:45:58,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 13:45:58,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 13:45:58,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:45:58,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:45:58,863 INFO L85 PathProgramCache]: Analyzing trace with hash 707601402, now seen corresponding path program 1 times [2023-08-27 13:45:58,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:45:58,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936475619] [2023-08-27 13:45:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:58,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:45:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:58,964 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 13:45:58,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:45:58,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936475619] [2023-08-27 13:45:58,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936475619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:45:58,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:45:58,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:45:58,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448262696] [2023-08-27 13:45:58,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:45:58,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:45:58,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:45:58,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:45:58,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:45:58,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:45:58,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:58,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:45:58,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:45:58,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:45:59,148 INFO L124 PetriNetUnfolderBase]: 658/1038 cut-off events. [2023-08-27 13:45:59,148 INFO L125 PetriNetUnfolderBase]: For 154/154 co-relation queries the response was YES. [2023-08-27 13:45:59,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 1038 events. 658/1038 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 5272 event pairs, 392 based on Foata normal form. 18/446 useless extension candidates. Maximal degree in co-relation 2303. Up to 843 conditions per place. [2023-08-27 13:45:59,152 INFO L140 encePairwiseOnDemand]: 259/270 looper letters, 61 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2023-08-27 13:45:59,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 67 transitions, 341 flow [2023-08-27 13:45:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:45:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:45:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2023-08-27 13:45:59,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2023-08-27 13:45:59,154 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2023-08-27 13:45:59,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2023-08-27 13:45:59,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:45:59,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2023-08-27 13:45:59,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:59,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:59,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:59,157 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 144 flow. Second operand 5 states and 510 transitions. [2023-08-27 13:45:59,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 67 transitions, 341 flow [2023-08-27 13:45:59,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 67 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:45:59,159 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 182 flow [2023-08-27 13:45:59,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=182, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-27 13:45:59,160 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-27 13:45:59,160 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 182 flow [2023-08-27 13:45:59,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:59,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:45:59,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 13:45:59,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 13:45:59,160 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:45:59,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:45:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash 460818625, now seen corresponding path program 1 times [2023-08-27 13:45:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:45:59,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90049254] [2023-08-27 13:45:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:59,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:45:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:59,367 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 13:45:59,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:45:59,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90049254] [2023-08-27 13:45:59,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90049254] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:45:59,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63408899] [2023-08-27 13:45:59,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:45:59,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:45:59,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:45:59,381 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 13:45:59,394 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 13:45:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:45:59,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 13:45:59,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:45:59,519 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 13:45:59,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:45:59,553 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 13:45:59,565 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 13:45:59,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:45:59,608 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_114 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_114) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) 4294967296)) is different from false [2023-08-27 13:45:59,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:45:59,622 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 22 treesize of output 23 [2023-08-27 13:45:59,634 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:45:59,634 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 33 treesize of output 29 [2023-08-27 13:45:59,638 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 5 treesize of output 3 [2023-08-27 13:45:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 13:45:59,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63408899] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:45:59,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:45:59,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-27 13:45:59,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288398013] [2023-08-27 13:45:59,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:45:59,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 13:45:59,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:45:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 13:45:59,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=84, Unknown=1, NotChecked=18, Total=132 [2023-08-27 13:45:59,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:45:59,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 182 flow. Second operand has 12 states, 12 states have (on average 85.25) internal successors, (1023), 12 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:45:59,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:45:59,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:45:59,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:00,045 INFO L124 PetriNetUnfolderBase]: 847/1378 cut-off events. [2023-08-27 13:46:00,046 INFO L125 PetriNetUnfolderBase]: For 450/450 co-relation queries the response was YES. [2023-08-27 13:46:00,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3418 conditions, 1378 events. 847/1378 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 8260 event pairs, 233 based on Foata normal form. 0/621 useless extension candidates. Maximal degree in co-relation 3383. Up to 856 conditions per place. [2023-08-27 13:46:00,052 INFO L140 encePairwiseOnDemand]: 257/270 looper letters, 46 selfloop transitions, 23 changer transitions 0/70 dead transitions. [2023-08-27 13:46:00,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 416 flow [2023-08-27 13:46:00,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:46:00,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:46:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 732 transitions. [2023-08-27 13:46:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3388888888888889 [2023-08-27 13:46:00,054 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 732 transitions. [2023-08-27 13:46:00,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 732 transitions. [2023-08-27 13:46:00,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:00,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 732 transitions. [2023-08-27 13:46:00,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.5) internal successors, (732), 8 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,057 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,057 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 182 flow. Second operand 8 states and 732 transitions. [2023-08-27 13:46:00,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 416 flow [2023-08-27 13:46:00,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 411 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:46:00,060 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 312 flow [2023-08-27 13:46:00,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=312, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-27 13:46:00,060 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 16 predicate places. [2023-08-27 13:46:00,060 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 312 flow [2023-08-27 13:46:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 85.25) internal successors, (1023), 12 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:00,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 13:46:00,068 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 13:46:00,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:00,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:00,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash 460818628, now seen corresponding path program 1 times [2023-08-27 13:46:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:00,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073320286] [2023-08-27 13:46:00,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:00,313 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 13:46:00,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:00,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073320286] [2023-08-27 13:46:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073320286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:00,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:46:00,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 13:46:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834731417] [2023-08-27 13:46:00,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:00,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:46:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:46:00,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:46:00,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 270 [2023-08-27 13:46:00,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:00,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 270 [2023-08-27 13:46:00,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:00,470 INFO L124 PetriNetUnfolderBase]: 771/1292 cut-off events. [2023-08-27 13:46:00,470 INFO L125 PetriNetUnfolderBase]: For 862/1023 co-relation queries the response was YES. [2023-08-27 13:46:00,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3508 conditions, 1292 events. 771/1292 cut-off events. For 862/1023 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 7798 event pairs, 175 based on Foata normal form. 163/824 useless extension candidates. Maximal degree in co-relation 3469. Up to 1110 conditions per place. [2023-08-27 13:46:00,477 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 60 selfloop transitions, 6 changer transitions 1/71 dead transitions. [2023-08-27 13:46:00,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 504 flow [2023-08-27 13:46:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:46:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:46:00,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-27 13:46:00,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679012345679012 [2023-08-27 13:46:00,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-27 13:46:00,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-27 13:46:00,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:00,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-27 13:46:00,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,481 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 312 flow. Second operand 3 states and 379 transitions. [2023-08-27 13:46:00,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 504 flow [2023-08-27 13:46:00,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 488 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 13:46:00,484 INFO L231 Difference]: Finished difference. Result has 56 places, 58 transitions, 338 flow [2023-08-27 13:46:00,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=56, PETRI_TRANSITIONS=58} [2023-08-27 13:46:00,484 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-08-27 13:46:00,485 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 58 transitions, 338 flow [2023-08-27 13:46:00,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:00,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 13:46:00,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 13:46:00,485 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:00,486 INFO L85 PathProgramCache]: Analyzing trace with hash 460818624, now seen corresponding path program 1 times [2023-08-27 13:46:00,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:00,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320891265] [2023-08-27 13:46:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:00,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:00,630 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 13:46:00,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:00,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320891265] [2023-08-27 13:46:00,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320891265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:00,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520544695] [2023-08-27 13:46:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:00,633 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 13:46:00,660 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 13:46:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:00,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 13:46:00,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:00,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:46:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:00,764 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 13:46:00,775 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 13:46:00,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:00,841 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:00,842 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 24 treesize of output 25 [2023-08-27 13:46:00,847 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:00,847 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 39 treesize of output 35 [2023-08-27 13:46:00,851 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 7 treesize of output 5 [2023-08-27 13:46:00,868 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 13:46:00,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520544695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:00,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:00,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2023-08-27 13:46:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900946837] [2023-08-27 13:46:00,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 13:46:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:00,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 13:46:00,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=97, Unknown=4, NotChecked=0, Total=132 [2023-08-27 13:46:00,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:00,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 58 transitions, 338 flow. Second operand has 12 states, 12 states have (on average 85.25) internal successors, (1023), 12 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:00,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:00,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:00,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:01,183 INFO L124 PetriNetUnfolderBase]: 796/1353 cut-off events. [2023-08-27 13:46:01,183 INFO L125 PetriNetUnfolderBase]: For 1397/1397 co-relation queries the response was YES. [2023-08-27 13:46:01,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 1353 events. 796/1353 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 8186 event pairs, 284 based on Foata normal form. 1/875 useless extension candidates. Maximal degree in co-relation 4246. Up to 872 conditions per place. [2023-08-27 13:46:01,191 INFO L140 encePairwiseOnDemand]: 257/270 looper letters, 50 selfloop transitions, 25 changer transitions 0/76 dead transitions. [2023-08-27 13:46:01,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 76 transitions, 564 flow [2023-08-27 13:46:01,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:46:01,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:46:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 729 transitions. [2023-08-27 13:46:01,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3375 [2023-08-27 13:46:01,193 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 729 transitions. [2023-08-27 13:46:01,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 729 transitions. [2023-08-27 13:46:01,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:01,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 729 transitions. [2023-08-27 13:46:01,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 91.125) internal successors, (729), 8 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,196 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,196 INFO L175 Difference]: Start difference. First operand has 56 places, 58 transitions, 338 flow. Second operand 8 states and 729 transitions. [2023-08-27 13:46:01,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 76 transitions, 564 flow [2023-08-27 13:46:01,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 76 transitions, 553 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 13:46:01,200 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 391 flow [2023-08-27 13:46:01,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=391, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2023-08-27 13:46:01,200 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2023-08-27 13:46:01,201 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 391 flow [2023-08-27 13:46:01,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 85.25) internal successors, (1023), 12 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:01,201 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 13:46:01,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 13:46:01,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:01,406 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:01,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash 460818992, now seen corresponding path program 2 times [2023-08-27 13:46:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:01,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215643344] [2023-08-27 13:46:01,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:01,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:01,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:01,454 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 13:46:01,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215643344] [2023-08-27 13:46:01,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215643344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:01,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154701554] [2023-08-27 13:46:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:01,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:01,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:01,456 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 13:46:01,485 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 13:46:01,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:46:01,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:01,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 13:46:01,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:01,571 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 13:46:01,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:46:01,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154701554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:01,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:46:01,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 13:46:01,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583128019] [2023-08-27 13:46:01,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:01,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:46:01,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:01,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:46:01,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 13:46:01,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 270 [2023-08-27 13:46:01,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 391 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:01,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 270 [2023-08-27 13:46:01,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:01,706 INFO L124 PetriNetUnfolderBase]: 767/1300 cut-off events. [2023-08-27 13:46:01,706 INFO L125 PetriNetUnfolderBase]: For 1919/2075 co-relation queries the response was YES. [2023-08-27 13:46:01,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 1300 events. 767/1300 cut-off events. For 1919/2075 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 7976 event pairs, 426 based on Foata normal form. 157/975 useless extension candidates. Maximal degree in co-relation 4123. Up to 1284 conditions per place. [2023-08-27 13:46:01,713 INFO L140 encePairwiseOnDemand]: 268/270 looper letters, 54 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-27 13:46:01,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 59 transitions, 491 flow [2023-08-27 13:46:01,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:46:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:46:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 343 transitions. [2023-08-27 13:46:01,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42345679012345677 [2023-08-27 13:46:01,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 343 transitions. [2023-08-27 13:46:01,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 343 transitions. [2023-08-27 13:46:01,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:01,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 343 transitions. [2023-08-27 13:46:01,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,717 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 391 flow. Second operand 3 states and 343 transitions. [2023-08-27 13:46:01,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 59 transitions, 491 flow [2023-08-27 13:46:01,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 461 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-27 13:46:01,769 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 353 flow [2023-08-27 13:46:01,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=353, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2023-08-27 13:46:01,770 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 17 predicate places. [2023-08-27 13:46:01,770 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 353 flow [2023-08-27 13:46:01,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:01,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:01,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:01,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 13:46:01,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:01,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:01,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:01,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1400478325, now seen corresponding path program 1 times [2023-08-27 13:46:01,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163438274] [2023-08-27 13:46:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:01,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:02,211 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 13:46:02,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:02,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163438274] [2023-08-27 13:46:02,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163438274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:02,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904904029] [2023-08-27 13:46:02,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:02,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:02,233 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 13:46:02,269 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 13:46:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:02,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:46:02,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:02,382 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 13:46:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:02,408 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 13:46:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:02,449 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 13:46:02,454 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 13:46:02,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:02,473 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_228 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_228) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) 9223372039002259456))) is different from false [2023-08-27 13:46:02,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:02,530 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 27 treesize of output 28 [2023-08-27 13:46:02,536 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:02,537 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 73 treesize of output 69 [2023-08-27 13:46:02,546 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 56 treesize of output 52 [2023-08-27 13:46:02,551 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 24 [2023-08-27 13:46:02,591 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 13:46:02,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904904029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:02,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:02,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-08-27 13:46:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82379362] [2023-08-27 13:46:02,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:02,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 13:46:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 13:46:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=159, Unknown=6, NotChecked=26, Total=240 [2023-08-27 13:46:02,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:02,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 353 flow. Second operand has 16 states, 16 states have (on average 82.25) internal successors, (1316), 16 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:02,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:02,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:02,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:02,969 INFO L124 PetriNetUnfolderBase]: 786/1319 cut-off events. [2023-08-27 13:46:02,969 INFO L125 PetriNetUnfolderBase]: For 1925/1925 co-relation queries the response was YES. [2023-08-27 13:46:02,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4261 conditions, 1319 events. 786/1319 cut-off events. For 1925/1925 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 7805 event pairs, 299 based on Foata normal form. 25/862 useless extension candidates. Maximal degree in co-relation 4244. Up to 490 conditions per place. [2023-08-27 13:46:02,976 INFO L140 encePairwiseOnDemand]: 258/270 looper letters, 76 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2023-08-27 13:46:02,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 101 transitions, 717 flow [2023-08-27 13:46:02,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:46:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:46:02,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 642 transitions. [2023-08-27 13:46:02,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3396825396825397 [2023-08-27 13:46:02,979 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 642 transitions. [2023-08-27 13:46:02,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 642 transitions. [2023-08-27 13:46:02,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:02,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 642 transitions. [2023-08-27 13:46:02,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 91.71428571428571) internal successors, (642), 7 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:02,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:02,982 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:02,982 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 353 flow. Second operand 7 states and 642 transitions. [2023-08-27 13:46:02,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 101 transitions, 717 flow [2023-08-27 13:46:02,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 101 transitions, 716 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:46:02,987 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 464 flow [2023-08-27 13:46:02,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2023-08-27 13:46:02,988 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-08-27 13:46:02,988 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 464 flow [2023-08-27 13:46:02,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 82.25) internal successors, (1316), 16 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:02,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:02,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:03,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 13:46:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:03,194 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:03,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:03,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1404478006, now seen corresponding path program 1 times [2023-08-27 13:46:03,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:03,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606909555] [2023-08-27 13:46:03,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:03,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:03,217 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 13:46:03,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:03,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606909555] [2023-08-27 13:46:03,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606909555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:03,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:46:03,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:46:03,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132587102] [2023-08-27 13:46:03,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:03,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:46:03,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:03,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:46:03,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:46:03,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 270 [2023-08-27 13:46:03,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:03,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:03,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 270 [2023-08-27 13:46:03,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:03,416 INFO L124 PetriNetUnfolderBase]: 763/1432 cut-off events. [2023-08-27 13:46:03,417 INFO L125 PetriNetUnfolderBase]: For 3356/3449 co-relation queries the response was YES. [2023-08-27 13:46:03,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 1432 events. 763/1432 cut-off events. For 3356/3449 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 9272 event pairs, 384 based on Foata normal form. 133/1077 useless extension candidates. Maximal degree in co-relation 4984. Up to 1016 conditions per place. [2023-08-27 13:46:03,423 INFO L140 encePairwiseOnDemand]: 265/270 looper letters, 74 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-27 13:46:03,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 81 transitions, 752 flow [2023-08-27 13:46:03,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:46:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:46:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-27 13:46:03,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2023-08-27 13:46:03,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-27 13:46:03,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-27 13:46:03,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:03,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-27 13:46:03,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:03,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:03,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:03,427 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 464 flow. Second operand 3 states and 365 transitions. [2023-08-27 13:46:03,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 81 transitions, 752 flow [2023-08-27 13:46:03,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 726 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 13:46:03,430 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 457 flow [2023-08-27 13:46:03,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=457, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2023-08-27 13:46:03,430 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 23 predicate places. [2023-08-27 13:46:03,430 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 457 flow [2023-08-27 13:46:03,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:03,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:03,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 13:46:03,431 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:03,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1400479162, now seen corresponding path program 1 times [2023-08-27 13:46:03,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:03,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407942098] [2023-08-27 13:46:03,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:03,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:03,487 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 13:46:03,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407942098] [2023-08-27 13:46:03,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407942098] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:03,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100849097] [2023-08-27 13:46:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:03,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:03,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:03,501 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 13:46:03,525 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 13:46:03,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:03,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 13:46:03,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:03,654 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 13:46:03,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:03,687 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 13:46:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100849097] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:03,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:03,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-27 13:46:03,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247532918] [2023-08-27 13:46:03,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:03,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 13:46:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 13:46:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-27 13:46:03,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:03,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 457 flow. Second operand has 14 states, 14 states have (on average 90.28571428571429) internal successors, (1264), 14 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:03,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:03,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:03,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:04,020 INFO L124 PetriNetUnfolderBase]: 1032/1890 cut-off events. [2023-08-27 13:46:04,020 INFO L125 PetriNetUnfolderBase]: For 4257/4354 co-relation queries the response was YES. [2023-08-27 13:46:04,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7159 conditions, 1890 events. 1032/1890 cut-off events. For 4257/4354 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 12662 event pairs, 586 based on Foata normal form. 217/1685 useless extension candidates. Maximal degree in co-relation 7139. Up to 1212 conditions per place. [2023-08-27 13:46:04,035 INFO L140 encePairwiseOnDemand]: 257/270 looper letters, 100 selfloop transitions, 15 changer transitions 0/116 dead transitions. [2023-08-27 13:46:04,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 116 transitions, 990 flow [2023-08-27 13:46:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:46:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:46:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 707 transitions. [2023-08-27 13:46:04,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2023-08-27 13:46:04,037 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 707 transitions. [2023-08-27 13:46:04,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 707 transitions. [2023-08-27 13:46:04,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:04,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 707 transitions. [2023-08-27 13:46:04,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,042 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,042 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 457 flow. Second operand 7 states and 707 transitions. [2023-08-27 13:46:04,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 116 transitions, 990 flow [2023-08-27 13:46:04,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 116 transitions, 979 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:46:04,049 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 641 flow [2023-08-27 13:46:04,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=641, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2023-08-27 13:46:04,050 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 31 predicate places. [2023-08-27 13:46:04,050 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 641 flow [2023-08-27 13:46:04,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.28571428571429) internal successors, (1264), 14 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:04,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:04,073 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 13:46:04,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:04,256 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:04,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1404477927, now seen corresponding path program 1 times [2023-08-27 13:46:04,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:04,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699210992] [2023-08-27 13:46:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:04,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:04,317 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 13:46:04,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:04,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699210992] [2023-08-27 13:46:04,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699210992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:04,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:46:04,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:46:04,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794174880] [2023-08-27 13:46:04,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:04,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:46:04,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:04,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:46:04,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:46:04,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:04,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 641 flow. Second operand has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:04,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:04,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:04,547 INFO L124 PetriNetUnfolderBase]: 934/1712 cut-off events. [2023-08-27 13:46:04,547 INFO L125 PetriNetUnfolderBase]: For 7273/7566 co-relation queries the response was YES. [2023-08-27 13:46:04,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7071 conditions, 1712 events. 934/1712 cut-off events. For 7273/7566 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 11344 event pairs, 665 based on Foata normal form. 299/1642 useless extension candidates. Maximal degree in co-relation 7047. Up to 1666 conditions per place. [2023-08-27 13:46:04,558 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 60 selfloop transitions, 2 changer transitions 16/82 dead transitions. [2023-08-27 13:46:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 82 transitions, 837 flow [2023-08-27 13:46:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:46:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:46:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 492 transitions. [2023-08-27 13:46:04,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36444444444444446 [2023-08-27 13:46:04,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 492 transitions. [2023-08-27 13:46:04,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 492 transitions. [2023-08-27 13:46:04,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:04,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 492 transitions. [2023-08-27 13:46:04,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.4) internal successors, (492), 5 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 13:46:04,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,563 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 641 flow. Second operand 5 states and 492 transitions. [2023-08-27 13:46:04,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 82 transitions, 837 flow [2023-08-27 13:46:04,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 823 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 13:46:04,571 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 605 flow [2023-08-27 13:46:04,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=605, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2023-08-27 13:46:04,572 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 34 predicate places. [2023-08-27 13:46:04,572 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 605 flow [2023-08-27 13:46:04,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.4) internal successors, (452), 5 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:04,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:04,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:04,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 13:46:04,573 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:04,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:04,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1400615036, now seen corresponding path program 1 times [2023-08-27 13:46:04,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:04,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654779964] [2023-08-27 13:46:04,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:04,754 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 13:46:04,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654779964] [2023-08-27 13:46:04,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654779964] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:04,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512604116] [2023-08-27 13:46:04,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:04,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:04,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:04,774 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 13:46:04,810 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 13:46:04,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:04,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:46:04,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:04,896 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 13:46:04,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:04,917 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 13:46:04,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:04,937 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 13:46:04,943 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 13:46:04,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:04,962 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_314 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_314) c_~A~0.base) c_~A~0.offset) 4294967296)) is different from false [2023-08-27 13:46:04,984 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:04,984 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 25 treesize of output 26 [2023-08-27 13:46:04,990 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:04,990 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 125 treesize of output 117 [2023-08-27 13:46:04,994 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 20 treesize of output 16 [2023-08-27 13:46:04,998 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 23 treesize of output 21 [2023-08-27 13:46:05,022 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 13:46:05,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512604116] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:05,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:05,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-27 13:46:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91933652] [2023-08-27 13:46:05,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:05,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 13:46:05,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 13:46:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=141, Unknown=3, NotChecked=24, Total=210 [2023-08-27 13:46:05,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:05,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 66 transitions, 605 flow. Second operand has 15 states, 15 states have (on average 82.26666666666667) internal successors, (1234), 15 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:05,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:05,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:05,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:05,350 INFO L124 PetriNetUnfolderBase]: 857/1566 cut-off events. [2023-08-27 13:46:05,350 INFO L125 PetriNetUnfolderBase]: For 6392/6470 co-relation queries the response was YES. [2023-08-27 13:46:05,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6748 conditions, 1566 events. 857/1566 cut-off events. For 6392/6470 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 10310 event pairs, 317 based on Foata normal form. 126/1310 useless extension candidates. Maximal degree in co-relation 6722. Up to 710 conditions per place. [2023-08-27 13:46:05,359 INFO L140 encePairwiseOnDemand]: 258/270 looper letters, 58 selfloop transitions, 30 changer transitions 0/89 dead transitions. [2023-08-27 13:46:05,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 89 transitions, 899 flow [2023-08-27 13:46:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:46:05,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:46:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 623 transitions. [2023-08-27 13:46:05,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2023-08-27 13:46:05,361 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 623 transitions. [2023-08-27 13:46:05,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 623 transitions. [2023-08-27 13:46:05,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:05,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 623 transitions. [2023-08-27 13:46:05,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:05,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:05,365 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:05,365 INFO L175 Difference]: Start difference. First operand has 73 places, 66 transitions, 605 flow. Second operand 7 states and 623 transitions. [2023-08-27 13:46:05,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 89 transitions, 899 flow [2023-08-27 13:46:05,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 869 flow, removed 13 selfloop flow, removed 5 redundant places. [2023-08-27 13:46:05,374 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 639 flow [2023-08-27 13:46:05,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2023-08-27 13:46:05,376 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 31 predicate places. [2023-08-27 13:46:05,376 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 639 flow [2023-08-27 13:46:05,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.26666666666667) internal successors, (1234), 15 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:05,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:05,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:05,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 13:46:05,582 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 13:46:05,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:05,582 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash 469433393, now seen corresponding path program 1 times [2023-08-27 13:46:05,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:05,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880913827] [2023-08-27 13:46:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:05,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:05,756 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 13:46:05,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880913827] [2023-08-27 13:46:05,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880913827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:05,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627655678] [2023-08-27 13:46:05,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:05,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:05,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:05,761 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 13:46:05,764 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 13:46:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:05,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:46:05,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:05,904 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 13:46:05,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:05,927 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 13:46:05,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:05,962 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 13:46:05,971 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 13:46:05,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:06,039 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:06,040 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 25 treesize of output 26 [2023-08-27 13:46:06,045 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:06,045 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 63 treesize of output 59 [2023-08-27 13:46:06,053 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 48 treesize of output 44 [2023-08-27 13:46:06,056 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 22 treesize of output 20 [2023-08-27 13:46:06,089 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 13:46:06,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627655678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:06,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:06,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-27 13:46:06,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594748499] [2023-08-27 13:46:06,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:06,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 13:46:06,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:06,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 13:46:06,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=160, Unknown=5, NotChecked=0, Total=210 [2023-08-27 13:46:06,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:06,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 639 flow. Second operand has 15 states, 15 states have (on average 82.4) internal successors, (1236), 15 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:06,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:06,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:06,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:06,424 INFO L124 PetriNetUnfolderBase]: 788/1441 cut-off events. [2023-08-27 13:46:06,424 INFO L125 PetriNetUnfolderBase]: For 7510/7756 co-relation queries the response was YES. [2023-08-27 13:46:06,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 1441 events. 788/1441 cut-off events. For 7510/7756 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 9350 event pairs, 158 based on Foata normal form. 246/1389 useless extension candidates. Maximal degree in co-relation 6213. Up to 564 conditions per place. [2023-08-27 13:46:06,432 INFO L140 encePairwiseOnDemand]: 258/270 looper letters, 83 selfloop transitions, 15 changer transitions 0/102 dead transitions. [2023-08-27 13:46:06,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 102 transitions, 1229 flow [2023-08-27 13:46:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:46:06,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:46:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 624 transitions. [2023-08-27 13:46:06,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33015873015873015 [2023-08-27 13:46:06,434 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 624 transitions. [2023-08-27 13:46:06,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 624 transitions. [2023-08-27 13:46:06,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:06,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 624 transitions. [2023-08-27 13:46:06,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.14285714285714) internal successors, (624), 7 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:06,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:06,437 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:06,437 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 639 flow. Second operand 7 states and 624 transitions. [2023-08-27 13:46:06,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 102 transitions, 1229 flow [2023-08-27 13:46:06,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 1171 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 13:46:06,444 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 666 flow [2023-08-27 13:46:06,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=666, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2023-08-27 13:46:06,445 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 34 predicate places. [2023-08-27 13:46:06,445 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 666 flow [2023-08-27 13:46:06,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.4) internal successors, (1236), 15 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:06,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:06,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:06,461 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 13:46:06,650 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 13:46:06,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:06,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash 469433394, now seen corresponding path program 1 times [2023-08-27 13:46:06,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:06,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776135505] [2023-08-27 13:46:06,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:06,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:06,817 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 13:46:06,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776135505] [2023-08-27 13:46:06,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776135505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:06,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435192300] [2023-08-27 13:46:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:06,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:06,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:06,819 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 13:46:06,821 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 13:46:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:06,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:46:06,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:06,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:46:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:06,948 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 13:46:06,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:06,965 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 13:46:06,972 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 13:46:06,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:07,028 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:07,028 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 27 treesize of output 28 [2023-08-27 13:46:07,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:07,034 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 143 treesize of output 135 [2023-08-27 13:46:07,038 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 25 [2023-08-27 13:46:07,055 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-27 13:46:07,067 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 13:46:07,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435192300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:07,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:07,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-27 13:46:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864272503] [2023-08-27 13:46:07,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 13:46:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:07,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 13:46:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=159, Unknown=6, NotChecked=0, Total=210 [2023-08-27 13:46:07,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:07,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 666 flow. Second operand has 15 states, 15 states have (on average 82.4) internal successors, (1236), 15 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:07,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:07,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:07,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:07,402 INFO L124 PetriNetUnfolderBase]: 734/1339 cut-off events. [2023-08-27 13:46:07,402 INFO L125 PetriNetUnfolderBase]: For 6644/6870 co-relation queries the response was YES. [2023-08-27 13:46:07,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6626 conditions, 1339 events. 734/1339 cut-off events. For 6644/6870 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 8490 event pairs, 162 based on Foata normal form. 274/1417 useless extension candidates. Maximal degree in co-relation 6602. Up to 564 conditions per place. [2023-08-27 13:46:07,409 INFO L140 encePairwiseOnDemand]: 258/270 looper letters, 82 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-08-27 13:46:07,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 1220 flow [2023-08-27 13:46:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:46:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:46:07,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 623 transitions. [2023-08-27 13:46:07,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2023-08-27 13:46:07,412 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 623 transitions. [2023-08-27 13:46:07,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 623 transitions. [2023-08-27 13:46:07,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:07,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 623 transitions. [2023-08-27 13:46:07,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.0) internal successors, (623), 7 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:07,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:07,416 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:07,416 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 666 flow. Second operand 7 states and 623 transitions. [2023-08-27 13:46:07,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 1220 flow [2023-08-27 13:46:07,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 1208 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 13:46:07,422 INFO L231 Difference]: Finished difference. Result has 75 places, 67 transitions, 680 flow [2023-08-27 13:46:07,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=680, PETRI_PLACES=75, PETRI_TRANSITIONS=67} [2023-08-27 13:46:07,423 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 36 predicate places. [2023-08-27 13:46:07,423 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 67 transitions, 680 flow [2023-08-27 13:46:07,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 82.4) internal successors, (1236), 15 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:07,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:07,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:07,435 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 13:46:07,628 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 13:46:07,629 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:07,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:07,629 INFO L85 PathProgramCache]: Analyzing trace with hash 465434682, now seen corresponding path program 1 times [2023-08-27 13:46:07,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:07,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760436704] [2023-08-27 13:46:07,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:07,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:07,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760436704] [2023-08-27 13:46:07,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760436704] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:07,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477118916] [2023-08-27 13:46:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:07,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:07,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:07,686 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 13:46:07,724 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 13:46:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:07,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:46:07,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:07,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:46:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477118916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:07,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:46:07,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 13:46:07,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390245921] [2023-08-27 13:46:07,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:07,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:46:07,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:46:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:46:07,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 270 [2023-08-27 13:46:07,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 67 transitions, 680 flow. Second operand has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:07,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:07,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 270 [2023-08-27 13:46:07,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:07,983 INFO L124 PetriNetUnfolderBase]: 687/1244 cut-off events. [2023-08-27 13:46:07,983 INFO L125 PetriNetUnfolderBase]: For 4122/4300 co-relation queries the response was YES. [2023-08-27 13:46:07,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6443 conditions, 1244 events. 687/1244 cut-off events. For 4122/4300 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 7560 event pairs, 150 based on Foata normal form. 178/1250 useless extension candidates. Maximal degree in co-relation 6419. Up to 622 conditions per place. [2023-08-27 13:46:07,989 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 75 selfloop transitions, 16 changer transitions 0/92 dead transitions. [2023-08-27 13:46:07,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 1038 flow [2023-08-27 13:46:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:46:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:46:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 478 transitions. [2023-08-27 13:46:07,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425925925925926 [2023-08-27 13:46:07,991 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 478 transitions. [2023-08-27 13:46:07,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 478 transitions. [2023-08-27 13:46:07,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:07,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 478 transitions. [2023-08-27 13:46:07,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.5) internal successors, (478), 4 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,004 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,004 INFO L175 Difference]: Start difference. First operand has 75 places, 67 transitions, 680 flow. Second operand 4 states and 478 transitions. [2023-08-27 13:46:08,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 1038 flow [2023-08-27 13:46:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 1008 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 13:46:08,012 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 663 flow [2023-08-27 13:46:08,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=663, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2023-08-27 13:46:08,014 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 33 predicate places. [2023-08-27 13:46:08,014 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 663 flow [2023-08-27 13:46:08,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.75) internal successors, (431), 4 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:08,014 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:08,028 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 13:46:08,219 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 13:46:08,219 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:08,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:08,220 INFO L85 PathProgramCache]: Analyzing trace with hash 465434696, now seen corresponding path program 1 times [2023-08-27 13:46:08,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:08,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716503860] [2023-08-27 13:46:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:08,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:08,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716503860] [2023-08-27 13:46:08,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716503860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:08,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604110345] [2023-08-27 13:46:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:08,269 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 13:46:08,270 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 13:46:08,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:08,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:46:08,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:08,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:08,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:08,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604110345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:08,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:08,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 13:46:08,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400168526] [2023-08-27 13:46:08,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:08,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 13:46:08,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:08,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 13:46:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 13:46:08,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 270 [2023-08-27 13:46:08,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 663 flow. Second operand has 7 states, 7 states have (on average 107.71428571428571) internal successors, (754), 7 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:08,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 270 [2023-08-27 13:46:08,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:08,766 INFO L124 PetriNetUnfolderBase]: 1470/2678 cut-off events. [2023-08-27 13:46:08,767 INFO L125 PetriNetUnfolderBase]: For 10897/11314 co-relation queries the response was YES. [2023-08-27 13:46:08,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13672 conditions, 2678 events. 1470/2678 cut-off events. For 10897/11314 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 18485 event pairs, 491 based on Foata normal form. 489/2821 useless extension candidates. Maximal degree in co-relation 13650. Up to 1059 conditions per place. [2023-08-27 13:46:08,781 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 139 selfloop transitions, 21 changer transitions 0/161 dead transitions. [2023-08-27 13:46:08,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 161 transitions, 1818 flow [2023-08-27 13:46:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:46:08,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:46:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 732 transitions. [2023-08-27 13:46:08,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2023-08-27 13:46:08,783 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 732 transitions. [2023-08-27 13:46:08,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 732 transitions. [2023-08-27 13:46:08,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:08,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 732 transitions. [2023-08-27 13:46:08,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.0) internal successors, (732), 6 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,786 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 270.0) internal successors, (1890), 7 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,786 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 663 flow. Second operand 6 states and 732 transitions. [2023-08-27 13:46:08,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 161 transitions, 1818 flow [2023-08-27 13:46:08,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 161 transitions, 1791 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:46:08,796 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 751 flow [2023-08-27 13:46:08,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=751, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2023-08-27 13:46:08,796 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 39 predicate places. [2023-08-27 13:46:08,796 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 751 flow [2023-08-27 13:46:08,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.71428571428571) internal successors, (754), 7 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:08,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:08,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:08,817 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 13:46:09,004 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 13:46:09,004 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:09,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:09,004 INFO L85 PathProgramCache]: Analyzing trace with hash 465434628, now seen corresponding path program 2 times [2023-08-27 13:46:09,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:09,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689539473] [2023-08-27 13:46:09,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:09,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:09,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:09,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689539473] [2023-08-27 13:46:09,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689539473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:09,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881625025] [2023-08-27 13:46:09,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:09,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:09,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:09,229 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 13:46:09,229 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 13:46:09,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:46:09,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:09,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:46:09,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:09,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:46:09,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:09,377 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 13:46:09,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:09,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:09,471 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_475 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_475) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-27 13:46:09,478 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:09,478 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 26 treesize of output 27 [2023-08-27 13:46:09,484 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:09,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-27 13:46:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-27 13:46:09,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881625025] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:09,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:09,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 13:46:09,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722950057] [2023-08-27 13:46:09,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:09,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 13:46:09,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 13:46:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=285, Unknown=1, NotChecked=34, Total=380 [2023-08-27 13:46:09,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:09,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 751 flow. Second operand has 20 states, 20 states have (on average 85.2) internal successors, (1704), 20 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:09,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:09,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:09,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:10,243 INFO L124 PetriNetUnfolderBase]: 1456/2641 cut-off events. [2023-08-27 13:46:10,243 INFO L125 PetriNetUnfolderBase]: For 13510/13812 co-relation queries the response was YES. [2023-08-27 13:46:10,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13892 conditions, 2641 events. 1456/2641 cut-off events. For 13510/13812 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 18118 event pairs, 473 based on Foata normal form. 303/2559 useless extension candidates. Maximal degree in co-relation 13867. Up to 1661 conditions per place. [2023-08-27 13:46:10,257 INFO L140 encePairwiseOnDemand]: 258/270 looper letters, 71 selfloop transitions, 30 changer transitions 0/102 dead transitions. [2023-08-27 13:46:10,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 102 transitions, 1208 flow [2023-08-27 13:46:10,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 13:46:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 13:46:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 901 transitions. [2023-08-27 13:46:10,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3337037037037037 [2023-08-27 13:46:10,260 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 901 transitions. [2023-08-27 13:46:10,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 901 transitions. [2023-08-27 13:46:10,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:10,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 901 transitions. [2023-08-27 13:46:10,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.1) internal successors, (901), 10 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,265 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,265 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 751 flow. Second operand 10 states and 901 transitions. [2023-08-27 13:46:10,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 102 transitions, 1208 flow [2023-08-27 13:46:10,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 102 transitions, 1170 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-27 13:46:10,274 INFO L231 Difference]: Finished difference. Result has 89 places, 81 transitions, 916 flow [2023-08-27 13:46:10,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=916, PETRI_PLACES=89, PETRI_TRANSITIONS=81} [2023-08-27 13:46:10,274 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 50 predicate places. [2023-08-27 13:46:10,274 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 81 transitions, 916 flow [2023-08-27 13:46:10,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 85.2) internal successors, (1704), 20 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:10,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:10,285 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 13:46:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:10,480 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:10,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:10,480 INFO L85 PathProgramCache]: Analyzing trace with hash 465434631, now seen corresponding path program 1 times [2023-08-27 13:46:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:10,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463163660] [2023-08-27 13:46:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:10,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463163660] [2023-08-27 13:46:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463163660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:10,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:46:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:46:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695903931] [2023-08-27 13:46:10,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:46:10,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:46:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:46:10,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 270 [2023-08-27 13:46:10,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 81 transitions, 916 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:10,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 270 [2023-08-27 13:46:10,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:10,701 INFO L124 PetriNetUnfolderBase]: 988/1785 cut-off events. [2023-08-27 13:46:10,702 INFO L125 PetriNetUnfolderBase]: For 12056/12426 co-relation queries the response was YES. [2023-08-27 13:46:10,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 1785 events. 988/1785 cut-off events. For 12056/12426 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 11354 event pairs, 627 based on Foata normal form. 370/2097 useless extension candidates. Maximal degree in co-relation 9438. Up to 1758 conditions per place. [2023-08-27 13:46:10,711 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 69 selfloop transitions, 1 changer transitions 0/75 dead transitions. [2023-08-27 13:46:10,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 971 flow [2023-08-27 13:46:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:46:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:46:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-27 13:46:10,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43950617283950616 [2023-08-27 13:46:10,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-27 13:46:10,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-27 13:46:10,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:10,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-27 13:46:10,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,714 INFO L175 Difference]: Start difference. First operand has 89 places, 81 transitions, 916 flow. Second operand 3 states and 356 transitions. [2023-08-27 13:46:10,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 971 flow [2023-08-27 13:46:10,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 75 transitions, 953 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-27 13:46:10,724 INFO L231 Difference]: Finished difference. Result has 86 places, 75 transitions, 815 flow [2023-08-27 13:46:10,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=815, PETRI_PLACES=86, PETRI_TRANSITIONS=75} [2023-08-27 13:46:10,724 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 47 predicate places. [2023-08-27 13:46:10,724 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 75 transitions, 815 flow [2023-08-27 13:46:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:10,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:10,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-27 13:46:10,725 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:10,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:10,725 INFO L85 PathProgramCache]: Analyzing trace with hash 465434632, now seen corresponding path program 1 times [2023-08-27 13:46:10,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:10,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500543743] [2023-08-27 13:46:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:10,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:10,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:10,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500543743] [2023-08-27 13:46:10,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500543743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:10,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:46:10,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:46:10,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498304999] [2023-08-27 13:46:10,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:10,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:46:10,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:46:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:46:10,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 270 [2023-08-27 13:46:10,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 75 transitions, 815 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:10,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 270 [2023-08-27 13:46:10,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:10,896 INFO L124 PetriNetUnfolderBase]: 633/1119 cut-off events. [2023-08-27 13:46:10,896 INFO L125 PetriNetUnfolderBase]: For 9897/10259 co-relation queries the response was YES. [2023-08-27 13:46:10,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5855 conditions, 1119 events. 633/1119 cut-off events. For 9897/10259 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6082 event pairs, 354 based on Foata normal form. 544/1627 useless extension candidates. Maximal degree in co-relation 5824. Up to 1097 conditions per place. [2023-08-27 13:46:10,902 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 62 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-27 13:46:10,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 68 transitions, 847 flow [2023-08-27 13:46:10,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:46:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:46:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-27 13:46:10,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-08-27 13:46:10,903 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-27 13:46:10,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-27 13:46:10,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:10,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-27 13:46:10,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,905 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,905 INFO L175 Difference]: Start difference. First operand has 86 places, 75 transitions, 815 flow. Second operand 3 states and 354 transitions. [2023-08-27 13:46:10,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 68 transitions, 847 flow [2023-08-27 13:46:10,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 68 transitions, 794 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-27 13:46:10,911 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 670 flow [2023-08-27 13:46:10,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=670, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2023-08-27 13:46:10,912 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 44 predicate places. [2023-08-27 13:46:10,912 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 670 flow [2023-08-27 13:46:10,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:10,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:10,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:10,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-27 13:46:10,913 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:10,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash 465434629, now seen corresponding path program 1 times [2023-08-27 13:46:10,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:10,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960760319] [2023-08-27 13:46:10,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:10,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:11,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:11,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960760319] [2023-08-27 13:46:11,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960760319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:11,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104251054] [2023-08-27 13:46:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:11,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:11,101 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 13:46:11,126 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 13:46:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:11,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:46:11,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:11,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:46:11,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:11,270 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 13:46:11,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:11,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:11,378 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:11,378 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 24 treesize of output 25 [2023-08-27 13:46:11,385 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:11,385 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 37 treesize of output 31 [2023-08-27 13:46:11,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:11,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104251054] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:11,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:11,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 13:46:11,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342416688] [2023-08-27 13:46:11,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:11,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 13:46:11,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:11,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 13:46:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=317, Unknown=5, NotChecked=0, Total=380 [2023-08-27 13:46:11,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:11,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 670 flow. Second operand has 20 states, 20 states have (on average 85.2) internal successors, (1704), 20 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:11,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:11,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:11,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:11,831 INFO L124 PetriNetUnfolderBase]: 668/1167 cut-off events. [2023-08-27 13:46:11,831 INFO L125 PetriNetUnfolderBase]: For 6427/6597 co-relation queries the response was YES. [2023-08-27 13:46:11,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5669 conditions, 1167 events. 668/1167 cut-off events. For 6427/6597 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6151 event pairs, 261 based on Foata normal form. 171/1304 useless extension candidates. Maximal degree in co-relation 5639. Up to 928 conditions per place. [2023-08-27 13:46:11,837 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 60 selfloop transitions, 22 changer transitions 0/83 dead transitions. [2023-08-27 13:46:11,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 926 flow [2023-08-27 13:46:11,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 13:46:11,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 13:46:11,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 890 transitions. [2023-08-27 13:46:11,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2023-08-27 13:46:11,838 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 890 transitions. [2023-08-27 13:46:11,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 890 transitions. [2023-08-27 13:46:11,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:11,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 890 transitions. [2023-08-27 13:46:11,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.0) internal successors, (890), 10 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:11,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:11,842 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:11,842 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 670 flow. Second operand 10 states and 890 transitions. [2023-08-27 13:46:11,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 926 flow [2023-08-27 13:46:11,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 904 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 13:46:11,848 INFO L231 Difference]: Finished difference. Result has 89 places, 66 transitions, 670 flow [2023-08-27 13:46:11,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=670, PETRI_PLACES=89, PETRI_TRANSITIONS=66} [2023-08-27 13:46:11,848 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 50 predicate places. [2023-08-27 13:46:11,848 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 66 transitions, 670 flow [2023-08-27 13:46:11,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 85.2) internal successors, (1704), 20 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:11,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:11,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:11,855 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 13:46:12,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:12,054 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:12,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:12,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1667537573, now seen corresponding path program 1 times [2023-08-27 13:46:12,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:12,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286596330] [2023-08-27 13:46:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:12,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286596330] [2023-08-27 13:46:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286596330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811319024] [2023-08-27 13:46:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:12,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:12,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:12,109 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 13:46:12,111 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 13:46:12,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:12,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 13:46:12,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:12,253 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 13:46:12,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:12,280 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 13:46:12,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811319024] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:12,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:12,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-27 13:46:12,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156001152] [2023-08-27 13:46:12,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:12,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 13:46:12,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:12,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 13:46:12,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-27 13:46:12,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:12,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 66 transitions, 670 flow. Second operand has 14 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:12,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:12,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:12,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:12,474 INFO L124 PetriNetUnfolderBase]: 671/1179 cut-off events. [2023-08-27 13:46:12,474 INFO L125 PetriNetUnfolderBase]: For 6155/6217 co-relation queries the response was YES. [2023-08-27 13:46:12,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5750 conditions, 1179 events. 671/1179 cut-off events. For 6155/6217 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5967 event pairs, 375 based on Foata normal form. 94/1273 useless extension candidates. Maximal degree in co-relation 5720. Up to 1050 conditions per place. [2023-08-27 13:46:12,481 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 77 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2023-08-27 13:46:12,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 90 transitions, 980 flow [2023-08-27 13:46:12,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:46:12,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:46:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 677 transitions. [2023-08-27 13:46:12,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3582010582010582 [2023-08-27 13:46:12,484 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 677 transitions. [2023-08-27 13:46:12,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 677 transitions. [2023-08-27 13:46:12,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:12,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 677 transitions. [2023-08-27 13:46:12,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.71428571428571) internal successors, (677), 7 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:12,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:12,489 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:12,489 INFO L175 Difference]: Start difference. First operand has 89 places, 66 transitions, 670 flow. Second operand 7 states and 677 transitions. [2023-08-27 13:46:12,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 90 transitions, 980 flow [2023-08-27 13:46:12,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 90 transitions, 947 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-27 13:46:12,499 INFO L231 Difference]: Finished difference. Result has 91 places, 71 transitions, 712 flow [2023-08-27 13:46:12,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=712, PETRI_PLACES=91, PETRI_TRANSITIONS=71} [2023-08-27 13:46:12,500 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 52 predicate places. [2023-08-27 13:46:12,500 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 71 transitions, 712 flow [2023-08-27 13:46:12,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:12,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:12,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-27 13:46:12,525 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 13:46:12,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:12,705 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:12,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1543575287, now seen corresponding path program 2 times [2023-08-27 13:46:12,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:12,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144015080] [2023-08-27 13:46:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:12,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:12,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:12,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144015080] [2023-08-27 13:46:12,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144015080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:12,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077533108] [2023-08-27 13:46:12,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:12,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:12,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:12,801 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 13:46:12,834 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 13:46:12,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:46:12,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:12,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:46:12,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:13,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:13,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:13,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077533108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:13,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:13,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 13:46:13,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552410924] [2023-08-27 13:46:13,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:13,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 13:46:13,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:13,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 13:46:13,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-27 13:46:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:13,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 71 transitions, 712 flow. Second operand has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:13,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:13,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:13,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:13,327 INFO L124 PetriNetUnfolderBase]: 806/1402 cut-off events. [2023-08-27 13:46:13,327 INFO L125 PetriNetUnfolderBase]: For 9050/9404 co-relation queries the response was YES. [2023-08-27 13:46:13,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7424 conditions, 1402 events. 806/1402 cut-off events. For 9050/9404 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7489 event pairs, 367 based on Foata normal form. 412/1808 useless extension candidates. Maximal degree in co-relation 7391. Up to 948 conditions per place. [2023-08-27 13:46:13,336 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 110 selfloop transitions, 26 changer transitions 0/138 dead transitions. [2023-08-27 13:46:13,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 138 transitions, 1520 flow [2023-08-27 13:46:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:46:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:46:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 881 transitions. [2023-08-27 13:46:13,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625514403292181 [2023-08-27 13:46:13,339 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 881 transitions. [2023-08-27 13:46:13,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 881 transitions. [2023-08-27 13:46:13,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:13,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 881 transitions. [2023-08-27 13:46:13,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.88888888888889) internal successors, (881), 9 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:13,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:13,342 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:13,342 INFO L175 Difference]: Start difference. First operand has 91 places, 71 transitions, 712 flow. Second operand 9 states and 881 transitions. [2023-08-27 13:46:13,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 138 transitions, 1520 flow [2023-08-27 13:46:13,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 138 transitions, 1507 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 13:46:13,353 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 989 flow [2023-08-27 13:46:13,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=989, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2023-08-27 13:46:13,353 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 61 predicate places. [2023-08-27 13:46:13,353 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 989 flow [2023-08-27 13:46:13,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.21052631578948) internal successors, (1714), 19 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:13,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:13,354 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:13,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-27 13:46:13,558 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,SelfDestructingSolverStorable23 [2023-08-27 13:46:13,558 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:13,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:13,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1543549340, now seen corresponding path program 1 times [2023-08-27 13:46:13,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:13,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624726246] [2023-08-27 13:46:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:13,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:13,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624726246] [2023-08-27 13:46:13,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624726246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:13,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809602219] [2023-08-27 13:46:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:13,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:13,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:13,790 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 13:46:13,792 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 13:46:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:13,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 13:46:13,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:13,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:46:13,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:13,968 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 13:46:14,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:14,013 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 13:46:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:14,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:14,056 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_636 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_636) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset 4)) 4294967296)) is different from false [2023-08-27 13:46:14,060 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_636 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_636) c_~A~0.base) (+ c_~A~0.offset 4)) 4294967296)) is different from false [2023-08-27 13:46:14,085 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:14,085 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 27 treesize of output 28 [2023-08-27 13:46:14,091 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:14,091 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 141 treesize of output 129 [2023-08-27 13:46:14,095 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 25 treesize of output 21 [2023-08-27 13:46:14,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:46:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:14,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809602219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:14,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:14,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-27 13:46:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945985300] [2023-08-27 13:46:14,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:14,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 13:46:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:14,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 13:46:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=286, Unknown=5, NotChecked=70, Total=420 [2023-08-27 13:46:14,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:14,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 989 flow. Second operand has 21 states, 21 states have (on average 82.19047619047619) internal successors, (1726), 21 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:14,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:14,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:14,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:14,600 INFO L124 PetriNetUnfolderBase]: 761/1331 cut-off events. [2023-08-27 13:46:14,601 INFO L125 PetriNetUnfolderBase]: For 12731/12997 co-relation queries the response was YES. [2023-08-27 13:46:14,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7718 conditions, 1331 events. 761/1331 cut-off events. For 12731/12997 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7173 event pairs, 251 based on Foata normal form. 294/1601 useless extension candidates. Maximal degree in co-relation 7681. Up to 691 conditions per place. [2023-08-27 13:46:14,607 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 86 selfloop transitions, 33 changer transitions 0/121 dead transitions. [2023-08-27 13:46:14,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 121 transitions, 1515 flow [2023-08-27 13:46:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:46:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:46:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 801 transitions. [2023-08-27 13:46:14,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2023-08-27 13:46:14,609 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 801 transitions. [2023-08-27 13:46:14,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 801 transitions. [2023-08-27 13:46:14,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:14,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 801 transitions. [2023-08-27 13:46:14,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 89.0) internal successors, (801), 9 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:14,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:14,613 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:14,613 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 989 flow. Second operand 9 states and 801 transitions. [2023-08-27 13:46:14,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 121 transitions, 1515 flow [2023-08-27 13:46:14,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 121 transitions, 1473 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-27 13:46:14,626 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 1079 flow [2023-08-27 13:46:14,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1079, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2023-08-27 13:46:14,627 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 67 predicate places. [2023-08-27 13:46:14,627 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 1079 flow [2023-08-27 13:46:14,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 82.19047619047619) internal successors, (1726), 21 states have internal predecessors, (1726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:14,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:14,627 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:14,632 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 13:46:14,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:14,832 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:14,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1543549339, now seen corresponding path program 1 times [2023-08-27 13:46:14,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:14,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047938607] [2023-08-27 13:46:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:14,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:15,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047938607] [2023-08-27 13:46:15,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047938607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:15,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170354248] [2023-08-27 13:46:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:15,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:15,073 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 13:46:15,076 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 13:46:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:15,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 13:46:15,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:15,227 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 13:46:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:15,249 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 13:46:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:15,294 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 13:46:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:15,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:15,390 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_674 (Array Int Int)) (v_ArrVal_673 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_673) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_674) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-27 13:46:15,395 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:15,396 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 13:46:15,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:15,401 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 81 treesize of output 75 [2023-08-27 13:46:15,404 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 28 [2023-08-27 13:46:15,407 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2023-08-27 13:46:15,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-27 13:46:15,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170354248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:15,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:15,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-27 13:46:15,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264747779] [2023-08-27 13:46:15,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:15,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 13:46:15,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:15,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 13:46:15,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=348, Unknown=8, NotChecked=38, Total=462 [2023-08-27 13:46:15,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:15,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 84 transitions, 1079 flow. Second operand has 22 states, 22 states have (on average 82.22727272727273) internal successors, (1809), 22 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:15,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:15,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:15,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:15,952 INFO L124 PetriNetUnfolderBase]: 716/1259 cut-off events. [2023-08-27 13:46:15,952 INFO L125 PetriNetUnfolderBase]: For 12565/12807 co-relation queries the response was YES. [2023-08-27 13:46:15,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7544 conditions, 1259 events. 716/1259 cut-off events. For 12565/12807 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6732 event pairs, 238 based on Foata normal form. 270/1505 useless extension candidates. Maximal degree in co-relation 7505. Up to 691 conditions per place. [2023-08-27 13:46:15,959 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 95 selfloop transitions, 33 changer transitions 0/130 dead transitions. [2023-08-27 13:46:15,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 130 transitions, 1664 flow [2023-08-27 13:46:15,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 13:46:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 13:46:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 890 transitions. [2023-08-27 13:46:15,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296296296296296 [2023-08-27 13:46:15,960 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 890 transitions. [2023-08-27 13:46:15,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 890 transitions. [2023-08-27 13:46:15,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:15,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 890 transitions. [2023-08-27 13:46:15,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.0) internal successors, (890), 10 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:15,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:15,963 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:15,963 INFO L175 Difference]: Start difference. First operand has 106 places, 84 transitions, 1079 flow. Second operand 10 states and 890 transitions. [2023-08-27 13:46:15,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 130 transitions, 1664 flow [2023-08-27 13:46:15,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 130 transitions, 1517 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-27 13:46:15,977 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 983 flow [2023-08-27 13:46:15,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=983, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2023-08-27 13:46:15,977 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 65 predicate places. [2023-08-27 13:46:15,977 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 983 flow [2023-08-27 13:46:15,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 82.22727272727273) internal successors, (1809), 22 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:15,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:15,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-27 13:46:15,982 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 13:46:16,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:16,182 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:16,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:16,183 INFO L85 PathProgramCache]: Analyzing trace with hash 613942977, now seen corresponding path program 3 times [2023-08-27 13:46:16,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:16,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252794818] [2023-08-27 13:46:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:16,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:16,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:16,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252794818] [2023-08-27 13:46:16,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252794818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:16,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605645964] [2023-08-27 13:46:16,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:46:16,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:16,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:16,438 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 13:46:16,440 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 13:46:16,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:46:16,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:16,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 13:46:16,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:16,616 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 13:46:16,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:16,641 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 13:46:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:16,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:16,770 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:16,770 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 24 treesize of output 25 [2023-08-27 13:46:16,776 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:16,776 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 37 treesize of output 31 [2023-08-27 13:46:16,785 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 7 treesize of output 3 [2023-08-27 13:46:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:16,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605645964] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:16,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:16,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-27 13:46:16,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306530867] [2023-08-27 13:46:16,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:16,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 13:46:16,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:16,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 13:46:16,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=478, Unknown=3, NotChecked=0, Total=552 [2023-08-27 13:46:16,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:16,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 983 flow. Second operand has 24 states, 24 states have (on average 85.16666666666667) internal successors, (2044), 24 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:16,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:16,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:16,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:17,353 INFO L124 PetriNetUnfolderBase]: 706/1233 cut-off events. [2023-08-27 13:46:17,353 INFO L125 PetriNetUnfolderBase]: For 10448/10653 co-relation queries the response was YES. [2023-08-27 13:46:17,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7178 conditions, 1233 events. 706/1233 cut-off events. For 10448/10653 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6403 event pairs, 241 based on Foata normal form. 206/1403 useless extension candidates. Maximal degree in co-relation 7143. Up to 1031 conditions per place. [2023-08-27 13:46:17,359 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 77 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2023-08-27 13:46:17,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 106 transitions, 1389 flow [2023-08-27 13:46:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 13:46:17,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 13:46:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1149 transitions. [2023-08-27 13:46:17,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32735042735042735 [2023-08-27 13:46:17,360 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1149 transitions. [2023-08-27 13:46:17,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1149 transitions. [2023-08-27 13:46:17,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:17,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1149 transitions. [2023-08-27 13:46:17,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 88.38461538461539) internal successors, (1149), 13 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 270.0) internal successors, (3780), 14 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,364 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 270.0) internal successors, (3780), 14 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,364 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 983 flow. Second operand 13 states and 1149 transitions. [2023-08-27 13:46:17,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 106 transitions, 1389 flow [2023-08-27 13:46:17,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 106 transitions, 1305 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-27 13:46:17,375 INFO L231 Difference]: Finished difference. Result has 112 places, 91 transitions, 1073 flow [2023-08-27 13:46:17,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1073, PETRI_PLACES=112, PETRI_TRANSITIONS=91} [2023-08-27 13:46:17,375 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 73 predicate places. [2023-08-27 13:46:17,375 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 91 transitions, 1073 flow [2023-08-27 13:46:17,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.16666666666667) internal successors, (2044), 24 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:17,376 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:17,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-27 13:46:17,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:17,581 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:17,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash 737905341, now seen corresponding path program 1 times [2023-08-27 13:46:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352191295] [2023-08-27 13:46:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:46:17,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:17,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352191295] [2023-08-27 13:46:17,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352191295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:46:17,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:46:17,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:46:17,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199930664] [2023-08-27 13:46:17,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:46:17,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:46:17,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:17,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:46:17,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:46:17,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 270 [2023-08-27 13:46:17,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 91 transitions, 1073 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:17,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 270 [2023-08-27 13:46:17,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:17,758 INFO L124 PetriNetUnfolderBase]: 682/1196 cut-off events. [2023-08-27 13:46:17,758 INFO L125 PetriNetUnfolderBase]: For 7956/8008 co-relation queries the response was YES. [2023-08-27 13:46:17,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6718 conditions, 1196 events. 682/1196 cut-off events. For 7956/8008 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6068 event pairs, 98 based on Foata normal form. 104/1296 useless extension candidates. Maximal degree in co-relation 6680. Up to 722 conditions per place. [2023-08-27 13:46:17,763 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 105 selfloop transitions, 6 changer transitions 0/117 dead transitions. [2023-08-27 13:46:17,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 117 transitions, 1587 flow [2023-08-27 13:46:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:46:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:46:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 349 transitions. [2023-08-27 13:46:17,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308641975308642 [2023-08-27 13:46:17,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 349 transitions. [2023-08-27 13:46:17,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 349 transitions. [2023-08-27 13:46:17,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:17,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 349 transitions. [2023-08-27 13:46:17,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,765 INFO L175 Difference]: Start difference. First operand has 112 places, 91 transitions, 1073 flow. Second operand 3 states and 349 transitions. [2023-08-27 13:46:17,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 117 transitions, 1587 flow [2023-08-27 13:46:17,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 117 transitions, 1563 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-27 13:46:17,775 INFO L231 Difference]: Finished difference. Result has 109 places, 90 transitions, 1049 flow [2023-08-27 13:46:17,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1049, PETRI_PLACES=109, PETRI_TRANSITIONS=90} [2023-08-27 13:46:17,776 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 70 predicate places. [2023-08-27 13:46:17,776 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 90 transitions, 1049 flow [2023-08-27 13:46:17,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:17,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:17,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1] [2023-08-27 13:46:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-27 13:46:17,776 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:17,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 613942976, now seen corresponding path program 3 times [2023-08-27 13:46:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:17,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064144487] [2023-08-27 13:46:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:17,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:17,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:17,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064144487] [2023-08-27 13:46:17,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064144487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:17,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815168604] [2023-08-27 13:46:17,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:46:17,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:17,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:18,006 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 13:46:18,012 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 13:46:18,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:46:18,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:18,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 13:46:18,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:18,190 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 13:46:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:18,214 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 13:46:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:18,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:18,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:18,339 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 26 treesize of output 27 [2023-08-27 13:46:18,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:18,344 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 43 treesize of output 37 [2023-08-27 13:46:18,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-27 13:46:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:18,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815168604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:18,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:18,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-27 13:46:18,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723247392] [2023-08-27 13:46:18,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:18,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 13:46:18,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:18,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 13:46:18,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=480, Unknown=1, NotChecked=0, Total=552 [2023-08-27 13:46:18,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:18,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 90 transitions, 1049 flow. Second operand has 24 states, 24 states have (on average 85.16666666666667) internal successors, (2044), 24 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:18,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:18,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:18,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:18,874 INFO L124 PetriNetUnfolderBase]: 620/1077 cut-off events. [2023-08-27 13:46:18,874 INFO L125 PetriNetUnfolderBase]: For 8427/8610 co-relation queries the response was YES. [2023-08-27 13:46:18,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6276 conditions, 1077 events. 620/1077 cut-off events. For 8427/8610 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5355 event pairs, 215 based on Foata normal form. 184/1229 useless extension candidates. Maximal degree in co-relation 6238. Up to 898 conditions per place. [2023-08-27 13:46:18,879 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 83 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2023-08-27 13:46:18,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 111 transitions, 1420 flow [2023-08-27 13:46:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 13:46:18,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 13:46:18,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1237 transitions. [2023-08-27 13:46:18,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32724867724867723 [2023-08-27 13:46:18,881 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1237 transitions. [2023-08-27 13:46:18,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1237 transitions. [2023-08-27 13:46:18,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:18,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1237 transitions. [2023-08-27 13:46:18,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 88.35714285714286) internal successors, (1237), 14 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:18,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:18,885 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:18,885 INFO L175 Difference]: Start difference. First operand has 109 places, 90 transitions, 1049 flow. Second operand 14 states and 1237 transitions. [2023-08-27 13:46:18,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 111 transitions, 1420 flow [2023-08-27 13:46:18,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 111 transitions, 1375 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-27 13:46:18,895 INFO L231 Difference]: Finished difference. Result has 118 places, 88 transitions, 1036 flow [2023-08-27 13:46:18,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=984, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1036, PETRI_PLACES=118, PETRI_TRANSITIONS=88} [2023-08-27 13:46:18,896 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 79 predicate places. [2023-08-27 13:46:18,896 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 88 transitions, 1036 flow [2023-08-27 13:46:18,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.16666666666667) internal successors, (2044), 24 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:18,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:18,896 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:18,901 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 13:46:19,101 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,SelfDestructingSolverStorable28 [2023-08-27 13:46:19,101 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:19,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:19,101 INFO L85 PathProgramCache]: Analyzing trace with hash 737905262, now seen corresponding path program 1 times [2023-08-27 13:46:19,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:19,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507776229] [2023-08-27 13:46:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:19,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:19,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507776229] [2023-08-27 13:46:19,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507776229] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:19,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117627620] [2023-08-27 13:46:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:19,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:19,308 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 13:46:19,309 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 13:46:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:19,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 13:46:19,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:19,474 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 13:46:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:19,502 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 13:46:19,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:19,526 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 13:46:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:19,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:19,651 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:19,651 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 27 treesize of output 28 [2023-08-27 13:46:19,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:19,657 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 141 treesize of output 129 [2023-08-27 13:46:19,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:46:19,663 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 25 treesize of output 21 [2023-08-27 13:46:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:19,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117627620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:19,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:19,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-27 13:46:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690700252] [2023-08-27 13:46:19,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:19,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 13:46:19,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 13:46:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=346, Unknown=10, NotChecked=0, Total=420 [2023-08-27 13:46:19,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:19,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 88 transitions, 1036 flow. Second operand has 21 states, 21 states have (on average 82.33333333333333) internal successors, (1729), 21 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:19,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:19,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:19,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:20,203 INFO L124 PetriNetUnfolderBase]: 864/1462 cut-off events. [2023-08-27 13:46:20,204 INFO L125 PetriNetUnfolderBase]: For 11642/11710 co-relation queries the response was YES. [2023-08-27 13:46:20,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8142 conditions, 1462 events. 864/1462 cut-off events. For 11642/11710 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7108 event pairs, 206 based on Foata normal form. 156/1614 useless extension candidates. Maximal degree in co-relation 8104. Up to 712 conditions per place. [2023-08-27 13:46:20,210 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 156 selfloop transitions, 15 changer transitions 0/177 dead transitions. [2023-08-27 13:46:20,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 2295 flow [2023-08-27 13:46:20,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 13:46:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 13:46:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 887 transitions. [2023-08-27 13:46:20,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32851851851851854 [2023-08-27 13:46:20,212 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 887 transitions. [2023-08-27 13:46:20,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 887 transitions. [2023-08-27 13:46:20,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:20,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 887 transitions. [2023-08-27 13:46:20,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 88.7) internal successors, (887), 10 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:20,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:20,214 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 270.0) internal successors, (2970), 11 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:20,215 INFO L175 Difference]: Start difference. First operand has 118 places, 88 transitions, 1036 flow. Second operand 10 states and 887 transitions. [2023-08-27 13:46:20,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 2295 flow [2023-08-27 13:46:20,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 177 transitions, 2244 flow, removed 1 selfloop flow, removed 10 redundant places. [2023-08-27 13:46:20,226 INFO L231 Difference]: Finished difference. Result has 119 places, 91 transitions, 1064 flow [2023-08-27 13:46:20,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1064, PETRI_PLACES=119, PETRI_TRANSITIONS=91} [2023-08-27 13:46:20,227 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 80 predicate places. [2023-08-27 13:46:20,227 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 91 transitions, 1064 flow [2023-08-27 13:46:20,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 82.33333333333333) internal successors, (1729), 21 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:20,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:20,227 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:20,232 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 13:46:20,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:20,432 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:20,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash 737905263, now seen corresponding path program 2 times [2023-08-27 13:46:20,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:20,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214277102] [2023-08-27 13:46:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214277102] [2023-08-27 13:46:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214277102] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757484427] [2023-08-27 13:46:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:20,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:20,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:20,611 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 13:46:20,613 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 13:46:20,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:46:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:20,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 13:46:20,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:20,774 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 13:46:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:20,808 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 13:46:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:20,837 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 13:46:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:20,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:21,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:21,097 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 13:46:21,104 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:21,104 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 13:46:21,109 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 13:46:21,113 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 36 treesize of output 24 [2023-08-27 13:46:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:21,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757484427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:21,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:21,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2023-08-27 13:46:21,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360582226] [2023-08-27 13:46:21,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:21,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 13:46:21,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 13:46:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=436, Unknown=2, NotChecked=0, Total=506 [2023-08-27 13:46:21,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:46:21,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 91 transitions, 1064 flow. Second operand has 23 states, 23 states have (on average 73.30434782608695) internal successors, (1686), 23 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:21,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:21,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:46:21,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:27,015 INFO L124 PetriNetUnfolderBase]: 1305/2217 cut-off events. [2023-08-27 13:46:27,015 INFO L125 PetriNetUnfolderBase]: For 16629/16685 co-relation queries the response was YES. [2023-08-27 13:46:27,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13813 conditions, 2217 events. 1305/2217 cut-off events. For 16629/16685 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12109 event pairs, 222 based on Foata normal form. 198/2413 useless extension candidates. Maximal degree in co-relation 13773. Up to 673 conditions per place. [2023-08-27 13:46:27,029 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 273 selfloop transitions, 38 changer transitions 2/319 dead transitions. [2023-08-27 13:46:27,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 319 transitions, 3887 flow [2023-08-27 13:46:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 13:46:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 13:46:27,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1910 transitions. [2023-08-27 13:46:27,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29475308641975306 [2023-08-27 13:46:27,031 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1910 transitions. [2023-08-27 13:46:27,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1910 transitions. [2023-08-27 13:46:27,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:27,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1910 transitions. [2023-08-27 13:46:27,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.58333333333333) internal successors, (1910), 24 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:27,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:27,037 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:27,037 INFO L175 Difference]: Start difference. First operand has 119 places, 91 transitions, 1064 flow. Second operand 24 states and 1910 transitions. [2023-08-27 13:46:27,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 319 transitions, 3887 flow [2023-08-27 13:46:27,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 319 transitions, 3757 flow, removed 27 selfloop flow, removed 9 redundant places. [2023-08-27 13:46:27,066 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 1215 flow [2023-08-27 13:46:27,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1215, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2023-08-27 13:46:27,067 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 98 predicate places. [2023-08-27 13:46:27,067 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 1215 flow [2023-08-27 13:46:27,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 73.30434782608695) internal successors, (1686), 23 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:27,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:27,067 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:27,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 13:46:27,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:27,272 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:27,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1982940731, now seen corresponding path program 2 times [2023-08-27 13:46:27,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:27,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615882980] [2023-08-27 13:46:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:27,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:27,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:27,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615882980] [2023-08-27 13:46:27,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615882980] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:27,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100340079] [2023-08-27 13:46:27,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:27,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:27,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:27,532 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 13:46:27,535 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 13:46:27,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:46:27,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:27,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 13:46:27,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:27,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:46:27,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:27,749 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 13:46:27,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:27,773 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 13:46:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:27,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:27,981 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:27,981 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 13:46:27,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:27,987 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 81 treesize of output 75 [2023-08-27 13:46:27,990 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 62 treesize of output 54 [2023-08-27 13:46:27,993 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 24 [2023-08-27 13:46:28,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:28,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100340079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:28,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:28,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 13:46:28,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555019671] [2023-08-27 13:46:28,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:28,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 13:46:28,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:28,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 13:46:28,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=713, Unknown=9, NotChecked=0, Total=812 [2023-08-27 13:46:28,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:28,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 1215 flow. Second operand has 29 states, 29 states have (on average 82.13793103448276) internal successors, (2382), 29 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:28,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:28,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:28,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:29,016 INFO L124 PetriNetUnfolderBase]: 1156/1959 cut-off events. [2023-08-27 13:46:29,016 INFO L125 PetriNetUnfolderBase]: For 17598/17832 co-relation queries the response was YES. [2023-08-27 13:46:29,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12078 conditions, 1959 events. 1156/1959 cut-off events. For 17598/17832 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10720 event pairs, 307 based on Foata normal form. 261/2183 useless extension candidates. Maximal degree in co-relation 12037. Up to 834 conditions per place. [2023-08-27 13:46:29,027 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 175 selfloop transitions, 27 changer transitions 0/206 dead transitions. [2023-08-27 13:46:29,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 206 transitions, 2600 flow [2023-08-27 13:46:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 13:46:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 13:46:29,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1061 transitions. [2023-08-27 13:46:29,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3274691358024691 [2023-08-27 13:46:29,028 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1061 transitions. [2023-08-27 13:46:29,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1061 transitions. [2023-08-27 13:46:29,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:29,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1061 transitions. [2023-08-27 13:46:29,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:29,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 270.0) internal successors, (3510), 13 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:29,031 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 270.0) internal successors, (3510), 13 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:29,031 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 1215 flow. Second operand 12 states and 1061 transitions. [2023-08-27 13:46:29,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 206 transitions, 2600 flow [2023-08-27 13:46:29,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 206 transitions, 2542 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-27 13:46:29,052 INFO L231 Difference]: Finished difference. Result has 140 places, 108 transitions, 1273 flow [2023-08-27 13:46:29,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1273, PETRI_PLACES=140, PETRI_TRANSITIONS=108} [2023-08-27 13:46:29,052 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 101 predicate places. [2023-08-27 13:46:29,052 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 108 transitions, 1273 flow [2023-08-27 13:46:29,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 82.13793103448276) internal successors, (2382), 29 states have internal predecessors, (2382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:29,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:29,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:29,059 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 13:46:29,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:29,258 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:29,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:29,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1982940732, now seen corresponding path program 2 times [2023-08-27 13:46:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726434831] [2023-08-27 13:46:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:29,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:29,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726434831] [2023-08-27 13:46:29,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726434831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:29,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190277542] [2023-08-27 13:46:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:29,521 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 13:46:29,523 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 13:46:29,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:46:29,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:29,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 13:46:29,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:29,725 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 13:46:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:29,764 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 13:46:29,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:29,800 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 13:46:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:29,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:30,005 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_925 (Array Int Int)) (|v_thread1Thread1of1ForFork1_~i~0#1_140| Int)) (or (<= c_~N~0 |v_thread1Thread1of1ForFork1_~i~0#1_140|) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_925) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork1_~i~0#1_140| 4))) 4294967296) (< |v_thread1Thread1of1ForFork1_~i~0#1_140| 2))) is different from false [2023-08-27 13:46:30,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:30,064 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-27 13:46:30,071 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:30,071 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 13:46:30,075 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 13:46:30,079 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 13:46:30,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:30,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190277542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:30,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:30,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 13:46:30,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167345767] [2023-08-27 13:46:30,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:30,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 13:46:30,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:30,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 13:46:30,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-27 13:46:30,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:46:30,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 108 transitions, 1273 flow. Second operand has 29 states, 29 states have (on average 73.13793103448276) internal successors, (2121), 29 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:30,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:30,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:46:30,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:33,420 INFO L124 PetriNetUnfolderBase]: 1412/2407 cut-off events. [2023-08-27 13:46:33,420 INFO L125 PetriNetUnfolderBase]: For 26062/26422 co-relation queries the response was YES. [2023-08-27 13:46:33,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14962 conditions, 2407 events. 1412/2407 cut-off events. For 26062/26422 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 13848 event pairs, 264 based on Foata normal form. 515/2908 useless extension candidates. Maximal degree in co-relation 14919. Up to 655 conditions per place. [2023-08-27 13:46:33,432 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 292 selfloop transitions, 88 changer transitions 2/386 dead transitions. [2023-08-27 13:46:33,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 386 transitions, 4611 flow [2023-08-27 13:46:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 13:46:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 13:46:33,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2327 transitions. [2023-08-27 13:46:33,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971902937420179 [2023-08-27 13:46:33,435 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2327 transitions. [2023-08-27 13:46:33,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2327 transitions. [2023-08-27 13:46:33,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:33,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2327 transitions. [2023-08-27 13:46:33,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 80.24137931034483) internal successors, (2327), 29 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:33,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 270.0) internal successors, (8100), 30 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:33,441 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 270.0) internal successors, (8100), 30 states have internal predecessors, (8100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:33,441 INFO L175 Difference]: Start difference. First operand has 140 places, 108 transitions, 1273 flow. Second operand 29 states and 2327 transitions. [2023-08-27 13:46:33,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 386 transitions, 4611 flow [2023-08-27 13:46:33,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 386 transitions, 4366 flow, removed 5 selfloop flow, removed 10 redundant places. [2023-08-27 13:46:33,474 INFO L231 Difference]: Finished difference. Result has 163 places, 148 transitions, 2001 flow [2023-08-27 13:46:33,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2001, PETRI_PLACES=163, PETRI_TRANSITIONS=148} [2023-08-27 13:46:33,474 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 124 predicate places. [2023-08-27 13:46:33,475 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 148 transitions, 2001 flow [2023-08-27 13:46:33,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 73.13793103448276) internal successors, (2121), 29 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:33,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:33,475 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1] [2023-08-27 13:46:33,480 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 13:46:33,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:33,680 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:33,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1852366778, now seen corresponding path program 4 times [2023-08-27 13:46:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302529574] [2023-08-27 13:46:33,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:33,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:33,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:33,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302529574] [2023-08-27 13:46:33,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302529574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:33,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445422404] [2023-08-27 13:46:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:46:33,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:33,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:33,789 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 13:46:33,791 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 13:46:33,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:46:33,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:33,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 13:46:33,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:34,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:34,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445422404] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:34,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:34,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 13:46:34,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523248386] [2023-08-27 13:46:34,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:34,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 13:46:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 13:46:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-27 13:46:34,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:34,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 148 transitions, 2001 flow. Second operand has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:34,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:34,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:34,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:34,452 INFO L124 PetriNetUnfolderBase]: 1302/2230 cut-off events. [2023-08-27 13:46:34,452 INFO L125 PetriNetUnfolderBase]: For 22140/22343 co-relation queries the response was YES. [2023-08-27 13:46:34,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14161 conditions, 2230 events. 1302/2230 cut-off events. For 22140/22343 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12529 event pairs, 567 based on Foata normal form. 228/2405 useless extension candidates. Maximal degree in co-relation 14116. Up to 1513 conditions per place. [2023-08-27 13:46:34,465 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 172 selfloop transitions, 44 changer transitions 0/220 dead transitions. [2023-08-27 13:46:34,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 220 transitions, 2935 flow [2023-08-27 13:46:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:46:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:46:34,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1053 transitions. [2023-08-27 13:46:34,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2023-08-27 13:46:34,466 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1053 transitions. [2023-08-27 13:46:34,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1053 transitions. [2023-08-27 13:46:34,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:34,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1053 transitions. [2023-08-27 13:46:34,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 95.72727272727273) internal successors, (1053), 11 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:34,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:34,469 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:34,469 INFO L175 Difference]: Start difference. First operand has 163 places, 148 transitions, 2001 flow. Second operand 11 states and 1053 transitions. [2023-08-27 13:46:34,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 220 transitions, 2935 flow [2023-08-27 13:46:34,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 220 transitions, 2776 flow, removed 21 selfloop flow, removed 13 redundant places. [2023-08-27 13:46:34,505 INFO L231 Difference]: Finished difference. Result has 161 places, 145 transitions, 1883 flow [2023-08-27 13:46:34,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1883, PETRI_PLACES=161, PETRI_TRANSITIONS=145} [2023-08-27 13:46:34,505 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 122 predicate places. [2023-08-27 13:46:34,505 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 145 transitions, 1883 flow [2023-08-27 13:46:34,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.16666666666667) internal successors, (2164), 24 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:34,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:34,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:34,513 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 13:46:34,711 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,SelfDestructingSolverStorable33 [2023-08-27 13:46:34,711 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:34,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:34,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1400230919, now seen corresponding path program 2 times [2023-08-27 13:46:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:34,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719528932] [2023-08-27 13:46:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:34,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:34,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719528932] [2023-08-27 13:46:34,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719528932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:34,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682845504] [2023-08-27 13:46:34,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:46:34,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:34,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:34,817 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 13:46:34,819 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 13:46:34,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:46:34,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:34,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:46:34,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:35,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:35,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682845504] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:35,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:35,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 13:46:35,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046080635] [2023-08-27 13:46:35,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:35,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 13:46:35,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:35,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 13:46:35,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-08-27 13:46:35,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:35,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 145 transitions, 1883 flow. Second operand has 19 states, 19 states have (on average 90.3157894736842) internal successors, (1716), 19 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:35,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:35,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:35,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:35,548 INFO L124 PetriNetUnfolderBase]: 1328/2277 cut-off events. [2023-08-27 13:46:35,548 INFO L125 PetriNetUnfolderBase]: For 21621/21785 co-relation queries the response was YES. [2023-08-27 13:46:35,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14034 conditions, 2277 events. 1328/2277 cut-off events. For 21621/21785 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12313 event pairs, 625 based on Foata normal form. 188/2457 useless extension candidates. Maximal degree in co-relation 13989. Up to 1915 conditions per place. [2023-08-27 13:46:35,562 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 153 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2023-08-27 13:46:35,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 181 transitions, 2547 flow [2023-08-27 13:46:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:46:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:46:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 861 transitions. [2023-08-27 13:46:35,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35432098765432096 [2023-08-27 13:46:35,564 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 861 transitions. [2023-08-27 13:46:35,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 861 transitions. [2023-08-27 13:46:35,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:35,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 861 transitions. [2023-08-27 13:46:35,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 95.66666666666667) internal successors, (861), 9 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:35,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:35,566 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:35,566 INFO L175 Difference]: Start difference. First operand has 161 places, 145 transitions, 1883 flow. Second operand 9 states and 861 transitions. [2023-08-27 13:46:35,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 181 transitions, 2547 flow [2023-08-27 13:46:35,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 181 transitions, 2411 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-08-27 13:46:35,600 INFO L231 Difference]: Finished difference. Result has 160 places, 144 transitions, 1819 flow [2023-08-27 13:46:35,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1779, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1819, PETRI_PLACES=160, PETRI_TRANSITIONS=144} [2023-08-27 13:46:35,601 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 121 predicate places. [2023-08-27 13:46:35,601 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 144 transitions, 1819 flow [2023-08-27 13:46:35,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.3157894736842) internal successors, (1716), 19 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:35,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:35,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:35,606 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 13:46:35,803 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,SelfDestructingSolverStorable34 [2023-08-27 13:46:35,804 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:35,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:35,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1376778577, now seen corresponding path program 3 times [2023-08-27 13:46:35,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:35,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973387868] [2023-08-27 13:46:35,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:35,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:35,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:36,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973387868] [2023-08-27 13:46:36,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973387868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:36,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125994616] [2023-08-27 13:46:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:46:36,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:36,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:36,018 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 13:46:36,019 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 13:46:36,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:46:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:36,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 13:46:36,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:36,232 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 13:46:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:36,254 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 13:46:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:36,278 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 13:46:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:36,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:36,440 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:36,441 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 27 treesize of output 28 [2023-08-27 13:46:36,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:36,447 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 141 treesize of output 129 [2023-08-27 13:46:36,450 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 25 treesize of output 21 [2023-08-27 13:46:36,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:46:36,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125994616] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:36,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:36,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-27 13:46:36,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738596792] [2023-08-27 13:46:36,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:36,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 13:46:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 13:46:36,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=613, Unknown=4, NotChecked=0, Total=702 [2023-08-27 13:46:36,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:36,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 144 transitions, 1819 flow. Second operand has 27 states, 27 states have (on average 82.25925925925925) internal successors, (2221), 27 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:36,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:36,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:36,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:37,316 INFO L124 PetriNetUnfolderBase]: 1631/2750 cut-off events. [2023-08-27 13:46:37,316 INFO L125 PetriNetUnfolderBase]: For 26823/26969 co-relation queries the response was YES. [2023-08-27 13:46:37,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 2750 events. 1631/2750 cut-off events. For 26823/26969 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 15179 event pairs, 402 based on Foata normal form. 288/3030 useless extension candidates. Maximal degree in co-relation 16959. Up to 1310 conditions per place. [2023-08-27 13:46:37,330 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 270 selfloop transitions, 26 changer transitions 0/306 dead transitions. [2023-08-27 13:46:37,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 306 transitions, 4516 flow [2023-08-27 13:46:37,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 13:46:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 13:46:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1061 transitions. [2023-08-27 13:46:37,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3274691358024691 [2023-08-27 13:46:37,332 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1061 transitions. [2023-08-27 13:46:37,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1061 transitions. [2023-08-27 13:46:37,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:37,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1061 transitions. [2023-08-27 13:46:37,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:37,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 270.0) internal successors, (3510), 13 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:37,335 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 270.0) internal successors, (3510), 13 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:37,335 INFO L175 Difference]: Start difference. First operand has 160 places, 144 transitions, 1819 flow. Second operand 12 states and 1061 transitions. [2023-08-27 13:46:37,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 306 transitions, 4516 flow [2023-08-27 13:46:37,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 306 transitions, 4480 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 13:46:37,375 INFO L231 Difference]: Finished difference. Result has 165 places, 148 transitions, 1910 flow [2023-08-27 13:46:37,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1783, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1910, PETRI_PLACES=165, PETRI_TRANSITIONS=148} [2023-08-27 13:46:37,376 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 126 predicate places. [2023-08-27 13:46:37,376 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 148 transitions, 1910 flow [2023-08-27 13:46:37,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 82.25925925925925) internal successors, (2221), 27 states have internal predecessors, (2221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:37,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:37,376 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1] [2023-08-27 13:46:37,381 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 13:46:37,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 13:46:37,581 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:37,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:37,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1828914436, now seen corresponding path program 5 times [2023-08-27 13:46:37,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:37,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973851261] [2023-08-27 13:46:37,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:37,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973851261] [2023-08-27 13:46:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973851261] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248799313] [2023-08-27 13:46:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:46:37,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:37,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:37,832 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 13:46:37,833 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 13:46:37,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 13:46:37,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:37,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 13:46:37,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:38,062 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 13:46:38,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:38,087 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 13:46:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:38,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:38,267 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:38,267 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 26 treesize of output 27 [2023-08-27 13:46:38,273 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:38,273 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 43 treesize of output 37 [2023-08-27 13:46:38,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-27 13:46:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248799313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:38,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:38,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-27 13:46:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207077593] [2023-08-27 13:46:38,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 13:46:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:38,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 13:46:38,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=776, Unknown=3, NotChecked=0, Total=870 [2023-08-27 13:46:38,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:38,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 148 transitions, 1910 flow. Second operand has 30 states, 30 states have (on average 85.13333333333334) internal successors, (2554), 30 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:38,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:38,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:38,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:39,154 INFO L124 PetriNetUnfolderBase]: 1548/2574 cut-off events. [2023-08-27 13:46:39,154 INFO L125 PetriNetUnfolderBase]: For 27571/27815 co-relation queries the response was YES. [2023-08-27 13:46:39,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17294 conditions, 2574 events. 1548/2574 cut-off events. For 27571/27815 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13870 event pairs, 624 based on Foata normal form. 243/2756 useless extension candidates. Maximal degree in co-relation 17246. Up to 2289 conditions per place. [2023-08-27 13:46:39,170 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 144 selfloop transitions, 42 changer transitions 0/190 dead transitions. [2023-08-27 13:46:39,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 190 transitions, 2776 flow [2023-08-27 13:46:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 13:46:39,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 13:46:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1411 transitions. [2023-08-27 13:46:39,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3266203703703704 [2023-08-27 13:46:39,171 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1411 transitions. [2023-08-27 13:46:39,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1411 transitions. [2023-08-27 13:46:39,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:39,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1411 transitions. [2023-08-27 13:46:39,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 88.1875) internal successors, (1411), 16 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:39,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 270.0) internal successors, (4590), 17 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:39,175 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 270.0) internal successors, (4590), 17 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:39,175 INFO L175 Difference]: Start difference. First operand has 165 places, 148 transitions, 1910 flow. Second operand 16 states and 1411 transitions. [2023-08-27 13:46:39,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 190 transitions, 2776 flow [2023-08-27 13:46:39,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 190 transitions, 2691 flow, removed 20 selfloop flow, removed 7 redundant places. [2023-08-27 13:46:39,216 INFO L231 Difference]: Finished difference. Result has 178 places, 158 transitions, 2135 flow [2023-08-27 13:46:39,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2135, PETRI_PLACES=178, PETRI_TRANSITIONS=158} [2023-08-27 13:46:39,216 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 139 predicate places. [2023-08-27 13:46:39,216 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 158 transitions, 2135 flow [2023-08-27 13:46:39,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.13333333333334) internal successors, (2554), 30 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:39,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:39,217 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:39,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 13:46:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:39,422 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:39,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash -269532796, now seen corresponding path program 4 times [2023-08-27 13:46:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419841669] [2023-08-27 13:46:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:39,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:39,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419841669] [2023-08-27 13:46:39,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419841669] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:39,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624904730] [2023-08-27 13:46:39,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:46:39,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:39,522 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 13:46:39,549 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 13:46:39,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:46:39,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:39,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 13:46:39,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:39,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:39,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:39,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624904730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:39,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:39,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-27 13:46:39,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120097732] [2023-08-27 13:46:39,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:39,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 13:46:39,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 13:46:39,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2023-08-27 13:46:39,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:46:39,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 158 transitions, 2135 flow. Second operand has 24 states, 24 states have (on average 90.25) internal successors, (2166), 24 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:39,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:39,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:46:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:40,304 INFO L124 PetriNetUnfolderBase]: 1556/2609 cut-off events. [2023-08-27 13:46:40,304 INFO L125 PetriNetUnfolderBase]: For 28152/28301 co-relation queries the response was YES. [2023-08-27 13:46:40,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17020 conditions, 2609 events. 1556/2609 cut-off events. For 28152/28301 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13842 event pairs, 671 based on Foata normal form. 185/2788 useless extension candidates. Maximal degree in co-relation 16967. Up to 1876 conditions per place. [2023-08-27 13:46:40,324 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 187 selfloop transitions, 29 changer transitions 0/226 dead transitions. [2023-08-27 13:46:40,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 226 transitions, 3150 flow [2023-08-27 13:46:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:46:40,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:46:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1048 transitions. [2023-08-27 13:46:40,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528619528619529 [2023-08-27 13:46:40,326 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1048 transitions. [2023-08-27 13:46:40,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1048 transitions. [2023-08-27 13:46:40,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:40,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1048 transitions. [2023-08-27 13:46:40,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 95.27272727272727) internal successors, (1048), 11 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:40,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:40,328 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:40,332 INFO L175 Difference]: Start difference. First operand has 178 places, 158 transitions, 2135 flow. Second operand 11 states and 1048 transitions. [2023-08-27 13:46:40,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 226 transitions, 3150 flow [2023-08-27 13:46:40,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 226 transitions, 3119 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-27 13:46:40,377 INFO L231 Difference]: Finished difference. Result has 184 places, 158 transitions, 2171 flow [2023-08-27 13:46:40,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2171, PETRI_PLACES=184, PETRI_TRANSITIONS=158} [2023-08-27 13:46:40,378 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 145 predicate places. [2023-08-27 13:46:40,378 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 158 transitions, 2171 flow [2023-08-27 13:46:40,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 90.25) internal successors, (2166), 24 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:40,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:40,378 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-27 13:46:40,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 13:46:40,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 13:46:40,583 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:40,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1101891835, now seen corresponding path program 4 times [2023-08-27 13:46:40,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:40,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3568277] [2023-08-27 13:46:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:40,904 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:40,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3568277] [2023-08-27 13:46:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3568277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945031314] [2023-08-27 13:46:40,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:46:40,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:40,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:40,906 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 13:46:40,907 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 13:46:41,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:46:41,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:41,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 13:46:41,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:41,148 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 13:46:41,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:41,172 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 21 treesize of output 20 [2023-08-27 13:46:41,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:41,197 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 13:46:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:41,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:41,420 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:46:41,420 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-08-27 13:46:41,425 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:41,426 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 37 treesize of output 31 [2023-08-27 13:46:41,427 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 7 treesize of output 3 [2023-08-27 13:46:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:41,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945031314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:41,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:41,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-27 13:46:41,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401591718] [2023-08-27 13:46:41,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:41,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 13:46:41,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:41,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 13:46:41,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=936, Unknown=14, NotChecked=0, Total=1056 [2023-08-27 13:46:41,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:46:41,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 158 transitions, 2171 flow. Second operand has 33 states, 33 states have (on average 85.12121212121212) internal successors, (2809), 33 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:41,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:41,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:46:41,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:42,284 INFO L124 PetriNetUnfolderBase]: 1488/2473 cut-off events. [2023-08-27 13:46:42,285 INFO L125 PetriNetUnfolderBase]: For 27108/27356 co-relation queries the response was YES. [2023-08-27 13:46:42,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16723 conditions, 2473 events. 1488/2473 cut-off events. For 27108/27356 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 13204 event pairs, 552 based on Foata normal form. 246/2662 useless extension candidates. Maximal degree in co-relation 16667. Up to 2078 conditions per place. [2023-08-27 13:46:42,299 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 127 selfloop transitions, 43 changer transitions 0/174 dead transitions. [2023-08-27 13:46:42,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 174 transitions, 2662 flow [2023-08-27 13:46:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:46:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:46:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1319 transitions. [2023-08-27 13:46:42,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32567901234567903 [2023-08-27 13:46:42,301 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1319 transitions. [2023-08-27 13:46:42,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1319 transitions. [2023-08-27 13:46:42,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:42,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1319 transitions. [2023-08-27 13:46:42,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.93333333333334) internal successors, (1319), 15 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:42,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:42,304 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:42,304 INFO L175 Difference]: Start difference. First operand has 184 places, 158 transitions, 2171 flow. Second operand 15 states and 1319 transitions. [2023-08-27 13:46:42,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 174 transitions, 2662 flow [2023-08-27 13:46:42,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 174 transitions, 2573 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-27 13:46:42,343 INFO L231 Difference]: Finished difference. Result has 188 places, 156 transitions, 2131 flow [2023-08-27 13:46:42,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2045, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2131, PETRI_PLACES=188, PETRI_TRANSITIONS=156} [2023-08-27 13:46:42,344 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 149 predicate places. [2023-08-27 13:46:42,344 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 156 transitions, 2131 flow [2023-08-27 13:46:42,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.12121212121212) internal successors, (2809), 33 states have internal predecessors, (2809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:42,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:42,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:42,349 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 13:46:42,549 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,SelfDestructingSolverStorable38 [2023-08-27 13:46:42,549 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:42,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash 649755976, now seen corresponding path program 3 times [2023-08-27 13:46:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:42,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031618133] [2023-08-27 13:46:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:42,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:42,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031618133] [2023-08-27 13:46:42,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031618133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537752427] [2023-08-27 13:46:42,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:46:42,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:42,815 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 13:46:42,835 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 13:46:42,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:46:42,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:42,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 13:46:43,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:43,066 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 13:46:43,100 INFO L322 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2023-08-27 13:46:43,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2023-08-27 13:46:43,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:43,118 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 13:46:43,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:43,143 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 13:46:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:46:43,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:43,253 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1209 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1209) c_~A~0.base) (+ c_~A~0.offset 8))))) is different from false [2023-08-27 13:46:43,258 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1209 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1208) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1209) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296))) is different from false [2023-08-27 13:46:43,316 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-27 13:46:43,316 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 36 treesize of output 47 [2023-08-27 13:46:43,328 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:43,328 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 100 [2023-08-27 13:46:43,332 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 62 treesize of output 54 [2023-08-27 13:46:43,336 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 24 [2023-08-27 13:46:43,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-27 13:46:43,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537752427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:43,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:43,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2023-08-27 13:46:43,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552289739] [2023-08-27 13:46:43,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:43,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 13:46:43,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:43,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 13:46:43,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=618, Unknown=4, NotChecked=102, Total=812 [2023-08-27 13:46:43,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:43,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 156 transitions, 2131 flow. Second operand has 29 states, 29 states have (on average 82.27586206896552) internal successors, (2386), 29 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:43,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:43,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:43,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:44,341 INFO L124 PetriNetUnfolderBase]: 1467/2456 cut-off events. [2023-08-27 13:46:44,342 INFO L125 PetriNetUnfolderBase]: For 26016/26097 co-relation queries the response was YES. [2023-08-27 13:46:44,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16121 conditions, 2456 events. 1467/2456 cut-off events. For 26016/26097 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 12750 event pairs, 365 based on Foata normal form. 141/2593 useless extension candidates. Maximal degree in co-relation 16066. Up to 1203 conditions per place. [2023-08-27 13:46:44,355 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 275 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2023-08-27 13:46:44,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 313 transitions, 4885 flow [2023-08-27 13:46:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 13:46:44,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 13:46:44,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1142 transitions. [2023-08-27 13:46:44,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32535612535612535 [2023-08-27 13:46:44,356 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1142 transitions. [2023-08-27 13:46:44,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1142 transitions. [2023-08-27 13:46:44,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:44,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1142 transitions. [2023-08-27 13:46:44,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 87.84615384615384) internal successors, (1142), 13 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:44,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 270.0) internal successors, (3780), 14 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:44,359 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 270.0) internal successors, (3780), 14 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:44,359 INFO L175 Difference]: Start difference. First operand has 188 places, 156 transitions, 2131 flow. Second operand 13 states and 1142 transitions. [2023-08-27 13:46:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 313 transitions, 4885 flow [2023-08-27 13:46:44,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 313 transitions, 4757 flow, removed 5 selfloop flow, removed 15 redundant places. [2023-08-27 13:46:44,396 INFO L231 Difference]: Finished difference. Result has 185 places, 155 transitions, 2066 flow [2023-08-27 13:46:44,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2066, PETRI_PLACES=185, PETRI_TRANSITIONS=155} [2023-08-27 13:46:44,397 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 146 predicate places. [2023-08-27 13:46:44,397 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 155 transitions, 2066 flow [2023-08-27 13:46:44,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 82.27586206896552) internal successors, (2386), 29 states have internal predecessors, (2386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:44,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:44,397 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:44,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 13:46:44,602 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,SelfDestructingSolverStorable39 [2023-08-27 13:46:44,602 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:44,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash 836841307, now seen corresponding path program 3 times [2023-08-27 13:46:44,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:44,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439555249] [2023-08-27 13:46:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:44,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439555249] [2023-08-27 13:46:44,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439555249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:44,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827361552] [2023-08-27 13:46:44,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:46:44,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:44,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:44,896 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 13:46:44,897 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 13:46:45,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:46:45,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:45,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 13:46:45,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:45,189 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 13:46:45,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:45,230 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 13:46:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:45,299 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 13:46:45,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:45,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:45,584 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1255 (Array Int Int)) (|v_thread1Thread1of1ForFork1_~i~0#1_175| Int)) (or (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1255) c_~A~0.base) (+ c_~A~0.offset (* |v_thread1Thread1of1ForFork1_~i~0#1_175| 4))) 9223372039002259456)) (<= c_~N~0 |v_thread1Thread1of1ForFork1_~i~0#1_175|) (< |v_thread1Thread1of1ForFork1_~i~0#1_175| 3))) is different from false [2023-08-27 13:46:45,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:45,655 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 13:46:45,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:45,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-27 13:46:45,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-27 13:46:45,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-27 13:46:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:45,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827361552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:45,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:45,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 13:46:45,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938958391] [2023-08-27 13:46:45,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:45,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 13:46:45,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 13:46:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=997, Unknown=3, NotChecked=64, Total=1190 [2023-08-27 13:46:45,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:46:45,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 155 transitions, 2066 flow. Second operand has 35 states, 35 states have (on average 73.11428571428571) internal successors, (2559), 35 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:45,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:45,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:46:45,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:53,206 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 13:46:53,635 INFO L124 PetriNetUnfolderBase]: 2078/3354 cut-off events. [2023-08-27 13:46:53,636 INFO L125 PetriNetUnfolderBase]: For 44844/45171 co-relation queries the response was YES. [2023-08-27 13:46:53,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22596 conditions, 3354 events. 2078/3354 cut-off events. For 44844/45171 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18076 event pairs, 492 based on Foata normal form. 471/3803 useless extension candidates. Maximal degree in co-relation 22543. Up to 911 conditions per place. [2023-08-27 13:46:53,659 INFO L140 encePairwiseOnDemand]: 259/270 looper letters, 474 selfloop transitions, 126 changer transitions 2/606 dead transitions. [2023-08-27 13:46:53,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 606 transitions, 7895 flow [2023-08-27 13:46:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 13:46:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 13:46:53,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3211 transitions. [2023-08-27 13:46:53,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2973148148148148 [2023-08-27 13:46:53,666 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3211 transitions. [2023-08-27 13:46:53,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3211 transitions. [2023-08-27 13:46:53,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:53,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3211 transitions. [2023-08-27 13:46:53,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 80.275) internal successors, (3211), 40 states have internal predecessors, (3211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:53,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 270.0) internal successors, (11070), 41 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:53,704 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 270.0) internal successors, (11070), 41 states have internal predecessors, (11070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:53,704 INFO L175 Difference]: Start difference. First operand has 185 places, 155 transitions, 2066 flow. Second operand 40 states and 3211 transitions. [2023-08-27 13:46:53,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 606 transitions, 7895 flow [2023-08-27 13:46:53,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 606 transitions, 7568 flow, removed 15 selfloop flow, removed 10 redundant places. [2023-08-27 13:46:53,773 INFO L231 Difference]: Finished difference. Result has 228 places, 192 transitions, 2956 flow [2023-08-27 13:46:53,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2956, PETRI_PLACES=228, PETRI_TRANSITIONS=192} [2023-08-27 13:46:53,773 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 189 predicate places. [2023-08-27 13:46:53,773 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 192 transitions, 2956 flow [2023-08-27 13:46:53,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 73.11428571428571) internal successors, (2559), 35 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:53,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:53,774 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:53,779 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 13:46:53,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:53,979 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:53,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1332396977, now seen corresponding path program 4 times [2023-08-27 13:46:53,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:53,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706015469] [2023-08-27 13:46:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:54,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:54,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:54,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706015469] [2023-08-27 13:46:54,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706015469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:54,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026899940] [2023-08-27 13:46:54,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:46:54,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:54,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:54,286 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 13:46:54,288 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 13:46:54,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:46:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:54,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 13:46:54,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:54,558 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 13:46:54,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:54,588 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 13:46:54,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:54,615 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 13:46:54,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:54,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:54,843 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:54,843 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 13:46:54,848 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:54,848 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 159 treesize of output 147 [2023-08-27 13:46:54,851 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 29 treesize of output 25 [2023-08-27 13:46:54,866 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 20 [2023-08-27 13:46:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026899940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:54,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:54,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-27 13:46:54,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344312043] [2023-08-27 13:46:54,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:54,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 13:46:54,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:54,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 13:46:54,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=944, Unknown=8, NotChecked=0, Total=1056 [2023-08-27 13:46:54,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:54,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 192 transitions, 2956 flow. Second operand has 33 states, 33 states have (on average 82.21212121212122) internal successors, (2713), 33 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:54,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:54,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:54,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:56,180 INFO L124 PetriNetUnfolderBase]: 2584/4106 cut-off events. [2023-08-27 13:46:56,181 INFO L125 PetriNetUnfolderBase]: For 74686/74902 co-relation queries the response was YES. [2023-08-27 13:46:56,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29907 conditions, 4106 events. 2584/4106 cut-off events. For 74686/74902 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21786 event pairs, 502 based on Foata normal form. 380/4478 useless extension candidates. Maximal degree in co-relation 29841. Up to 1696 conditions per place. [2023-08-27 13:46:56,213 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 440 selfloop transitions, 23 changer transitions 0/475 dead transitions. [2023-08-27 13:46:56,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 475 transitions, 8712 flow [2023-08-27 13:46:56,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 13:46:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 13:46:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1235 transitions. [2023-08-27 13:46:56,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32671957671957674 [2023-08-27 13:46:56,214 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1235 transitions. [2023-08-27 13:46:56,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1235 transitions. [2023-08-27 13:46:56,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:56,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1235 transitions. [2023-08-27 13:46:56,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 88.21428571428571) internal successors, (1235), 14 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:56,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:56,218 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:56,218 INFO L175 Difference]: Start difference. First operand has 228 places, 192 transitions, 2956 flow. Second operand 14 states and 1235 transitions. [2023-08-27 13:46:56,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 475 transitions, 8712 flow [2023-08-27 13:46:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 475 transitions, 7727 flow, removed 194 selfloop flow, removed 23 redundant places. [2023-08-27 13:46:56,316 INFO L231 Difference]: Finished difference. Result has 220 places, 195 transitions, 2759 flow [2023-08-27 13:46:56,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2650, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2759, PETRI_PLACES=220, PETRI_TRANSITIONS=195} [2023-08-27 13:46:56,317 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 181 predicate places. [2023-08-27 13:46:56,317 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 195 transitions, 2759 flow [2023-08-27 13:46:56,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 82.21212121212122) internal successors, (2713), 33 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:56,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:56,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:56,322 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 13:46:56,522 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,SelfDestructingSolverStorable41 [2023-08-27 13:46:56,522 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:56,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:56,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1332396978, now seen corresponding path program 5 times [2023-08-27 13:46:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:56,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542779919] [2023-08-27 13:46:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:56,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542779919] [2023-08-27 13:46:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542779919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13377073] [2023-08-27 13:46:56,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:46:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:56,845 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 13:46:56,846 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 13:46:57,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 13:46:57,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:57,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 13:46:57,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:57,157 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 13:46:57,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:57,183 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 13:46:57,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:57,207 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 13:46:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:57,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:46:57,349 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1347 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1347) c_~A~0.base) (+ c_~A~0.offset 12)) 9223372039002259456)) is different from false [2023-08-27 13:46:57,354 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1347 (Array Int Int)) (v_ArrVal_1346 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1346) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1347) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-27 13:46:57,366 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:57,366 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 27 treesize of output 28 [2023-08-27 13:46:57,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:46:57,386 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 141 treesize of output 129 [2023-08-27 13:46:57,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:46:57,392 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 25 treesize of output 21 [2023-08-27 13:46:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-27 13:46:57,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13377073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:46:57,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:46:57,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-27 13:46:57,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803920005] [2023-08-27 13:46:57,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:46:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 13:46:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:46:57,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 13:46:57,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=836, Unknown=2, NotChecked=118, Total=1056 [2023-08-27 13:46:57,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:46:57,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 195 transitions, 2759 flow. Second operand has 33 states, 33 states have (on average 82.21212121212122) internal successors, (2713), 33 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:57,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:46:57,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:46:57,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:46:58,693 INFO L124 PetriNetUnfolderBase]: 2434/3872 cut-off events. [2023-08-27 13:46:58,693 INFO L125 PetriNetUnfolderBase]: For 55917/56103 co-relation queries the response was YES. [2023-08-27 13:46:58,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28224 conditions, 3872 events. 2434/3872 cut-off events. For 55917/56103 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 20141 event pairs, 550 based on Foata normal form. 280/4144 useless extension candidates. Maximal degree in co-relation 28158. Up to 1696 conditions per place. [2023-08-27 13:46:58,728 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 439 selfloop transitions, 23 changer transitions 0/474 dead transitions. [2023-08-27 13:46:58,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 474 transitions, 7778 flow [2023-08-27 13:46:58,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 13:46:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 13:46:58,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1233 transitions. [2023-08-27 13:46:58,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261904761904762 [2023-08-27 13:46:58,730 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1233 transitions. [2023-08-27 13:46:58,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1233 transitions. [2023-08-27 13:46:58,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:46:58,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1233 transitions. [2023-08-27 13:46:58,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 88.07142857142857) internal successors, (1233), 14 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:58,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:58,733 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:58,733 INFO L175 Difference]: Start difference. First operand has 220 places, 195 transitions, 2759 flow. Second operand 14 states and 1233 transitions. [2023-08-27 13:46:58,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 474 transitions, 7778 flow [2023-08-27 13:46:58,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 474 transitions, 7682 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-08-27 13:46:58,851 INFO L231 Difference]: Finished difference. Result has 221 places, 194 transitions, 2694 flow [2023-08-27 13:46:58,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2648, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2694, PETRI_PLACES=221, PETRI_TRANSITIONS=194} [2023-08-27 13:46:58,851 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 182 predicate places. [2023-08-27 13:46:58,851 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 194 transitions, 2694 flow [2023-08-27 13:46:58,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 82.21212121212122) internal successors, (2713), 33 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:46:58,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:46:58,852 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1] [2023-08-27 13:46:58,857 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 13:46:59,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:59,057 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:46:59,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:46:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash -226022874, now seen corresponding path program 3 times [2023-08-27 13:46:59,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:46:59,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623520739] [2023-08-27 13:46:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:46:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:46:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:46:59,470 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:59,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:46:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623520739] [2023-08-27 13:46:59,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623520739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:46:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776294756] [2023-08-27 13:46:59,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:46:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:46:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:46:59,472 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 13:46:59,474 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 13:46:59,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 13:46:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:46:59,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 13:46:59,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:46:59,769 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 13:46:59,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:59,799 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 21 treesize of output 20 [2023-08-27 13:46:59,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:59,832 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 13:46:59,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:46:59,882 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 13:46:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:46:59,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:00,176 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:47:00,176 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 34 treesize of output 40 [2023-08-27 13:47:00,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:00,182 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 71 treesize of output 65 [2023-08-27 13:47:00,184 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 54 treesize of output 46 [2023-08-27 13:47:00,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-27 13:47:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776294756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:00,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:00,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2023-08-27 13:47:00,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426650117] [2023-08-27 13:47:00,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:00,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 13:47:00,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 13:47:00,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1191, Unknown=21, NotChecked=0, Total=1332 [2023-08-27 13:47:00,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:00,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 194 transitions, 2694 flow. Second operand has 37 states, 37 states have (on average 82.13513513513513) internal successors, (3039), 37 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:00,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:00,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:00,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:01,677 INFO L124 PetriNetUnfolderBase]: 2227/3531 cut-off events. [2023-08-27 13:47:01,677 INFO L125 PetriNetUnfolderBase]: For 53698/53973 co-relation queries the response was YES. [2023-08-27 13:47:01,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24104 conditions, 3531 events. 2227/3531 cut-off events. For 53698/53973 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 18503 event pairs, 488 based on Foata normal form. 338/3813 useless extension candidates. Maximal degree in co-relation 24040. Up to 1532 conditions per place. [2023-08-27 13:47:01,706 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 202 selfloop transitions, 84 changer transitions 0/290 dead transitions. [2023-08-27 13:47:01,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 290 transitions, 4324 flow [2023-08-27 13:47:01,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 13:47:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 13:47:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1233 transitions. [2023-08-27 13:47:01,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261904761904762 [2023-08-27 13:47:01,707 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1233 transitions. [2023-08-27 13:47:01,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1233 transitions. [2023-08-27 13:47:01,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:01,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1233 transitions. [2023-08-27 13:47:01,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 88.07142857142857) internal successors, (1233), 14 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:01,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:01,733 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 270.0) internal successors, (4050), 15 states have internal predecessors, (4050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:01,734 INFO L175 Difference]: Start difference. First operand has 221 places, 194 transitions, 2694 flow. Second operand 14 states and 1233 transitions. [2023-08-27 13:47:01,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 290 transitions, 4324 flow [2023-08-27 13:47:01,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 290 transitions, 4127 flow, removed 10 selfloop flow, removed 15 redundant places. [2023-08-27 13:47:01,819 INFO L231 Difference]: Finished difference. Result has 219 places, 193 transitions, 2749 flow [2023-08-27 13:47:01,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2749, PETRI_PLACES=219, PETRI_TRANSITIONS=193} [2023-08-27 13:47:01,819 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 180 predicate places. [2023-08-27 13:47:01,819 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 193 transitions, 2749 flow [2023-08-27 13:47:01,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 82.13513513513513) internal successors, (3039), 37 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:01,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:01,820 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1] [2023-08-27 13:47:01,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-27 13:47:02,026 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,SelfDestructingSolverStorable43 [2023-08-27 13:47:02,026 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:02,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -201087807, now seen corresponding path program 5 times [2023-08-27 13:47:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963309317] [2023-08-27 13:47:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:02,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963309317] [2023-08-27 13:47:02,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963309317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:02,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826654211] [2023-08-27 13:47:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:47:02,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:02,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:02,389 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 13:47:02,389 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 13:47:02,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 13:47:02,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:02,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:47:02,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:02,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:47:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:02,714 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 13:47:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:02,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:02,907 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1444 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1444) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 16 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-27 13:47:02,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:02,913 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-27 13:47:02,918 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:02,918 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 37 treesize of output 31 [2023-08-27 13:47:02,927 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 7 treesize of output 3 [2023-08-27 13:47:03,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-27 13:47:03,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826654211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:03,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:03,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-27 13:47:03,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992357467] [2023-08-27 13:47:03,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:03,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 13:47:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:03,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 13:47:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1084, Unknown=1, NotChecked=66, Total=1260 [2023-08-27 13:47:03,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:47:03,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 193 transitions, 2749 flow. Second operand has 36 states, 36 states have (on average 85.11111111111111) internal successors, (3064), 36 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:03,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:03,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:47:03,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:04,120 INFO L124 PetriNetUnfolderBase]: 2232/3534 cut-off events. [2023-08-27 13:47:04,121 INFO L125 PetriNetUnfolderBase]: For 47142/47433 co-relation queries the response was YES. [2023-08-27 13:47:04,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23953 conditions, 3534 events. 2232/3534 cut-off events. For 47142/47433 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18226 event pairs, 876 based on Foata normal form. 292/3763 useless extension candidates. Maximal degree in co-relation 23893. Up to 3177 conditions per place. [2023-08-27 13:47:04,147 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 183 selfloop transitions, 51 changer transitions 0/238 dead transitions. [2023-08-27 13:47:04,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 238 transitions, 3741 flow [2023-08-27 13:47:04,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 13:47:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 13:47:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1585 transitions. [2023-08-27 13:47:04,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32613168724279834 [2023-08-27 13:47:04,149 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1585 transitions. [2023-08-27 13:47:04,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1585 transitions. [2023-08-27 13:47:04,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:04,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1585 transitions. [2023-08-27 13:47:04,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 88.05555555555556) internal successors, (1585), 18 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 13:47:04,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:04,153 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:04,153 INFO L175 Difference]: Start difference. First operand has 219 places, 193 transitions, 2749 flow. Second operand 18 states and 1585 transitions. [2023-08-27 13:47:04,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 238 transitions, 3741 flow [2023-08-27 13:47:04,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 238 transitions, 3628 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-27 13:47:04,233 INFO L231 Difference]: Finished difference. Result has 232 places, 204 transitions, 2984 flow [2023-08-27 13:47:04,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2984, PETRI_PLACES=232, PETRI_TRANSITIONS=204} [2023-08-27 13:47:04,233 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 193 predicate places. [2023-08-27 13:47:04,233 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 204 transitions, 2984 flow [2023-08-27 13:47:04,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 85.11111111111111) internal successors, (3064), 36 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:04,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:04,234 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:04,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:04,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:04,440 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:04,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:04,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1645370919, now seen corresponding path program 6 times [2023-08-27 13:47:04,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:04,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663527050] [2023-08-27 13:47:04,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:04,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:04,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:04,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:04,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663527050] [2023-08-27 13:47:04,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663527050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:04,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876159204] [2023-08-27 13:47:04,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:47:04,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:04,597 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 13:47:04,664 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 13:47:04,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 13:47:04,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:04,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 13:47:04,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:04,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:04,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:05,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:05,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876159204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:05,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:05,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-27 13:47:05,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163183286] [2023-08-27 13:47:05,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 13:47:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:05,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 13:47:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-08-27 13:47:05,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:47:05,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 204 transitions, 2984 flow. Second operand has 29 states, 29 states have (on average 90.20689655172414) internal successors, (2616), 29 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:05,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:05,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:47:05,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:05,708 INFO L124 PetriNetUnfolderBase]: 2253/3605 cut-off events. [2023-08-27 13:47:05,709 INFO L125 PetriNetUnfolderBase]: For 41371/41449 co-relation queries the response was YES. [2023-08-27 13:47:05,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24084 conditions, 3605 events. 2253/3605 cut-off events. For 41371/41449 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 18252 event pairs, 899 based on Foata normal form. 138/3741 useless extension candidates. Maximal degree in co-relation 24018. Up to 2368 conditions per place. [2023-08-27 13:47:05,736 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 283 selfloop transitions, 42 changer transitions 0/337 dead transitions. [2023-08-27 13:47:05,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 337 transitions, 4854 flow [2023-08-27 13:47:05,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 13:47:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 13:47:05,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1236 transitions. [2023-08-27 13:47:05,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35213675213675216 [2023-08-27 13:47:05,738 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1236 transitions. [2023-08-27 13:47:05,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1236 transitions. [2023-08-27 13:47:05,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:05,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1236 transitions. [2023-08-27 13:47:05,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.07692307692308) internal successors, (1236), 13 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:05,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 270.0) internal successors, (3780), 14 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:05,741 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 270.0) internal successors, (3780), 14 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:05,741 INFO L175 Difference]: Start difference. First operand has 232 places, 204 transitions, 2984 flow. Second operand 13 states and 1236 transitions. [2023-08-27 13:47:05,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 337 transitions, 4854 flow [2023-08-27 13:47:05,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 337 transitions, 4818 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-27 13:47:05,809 INFO L231 Difference]: Finished difference. Result has 243 places, 215 transitions, 3210 flow [2023-08-27 13:47:05,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3210, PETRI_PLACES=243, PETRI_TRANSITIONS=215} [2023-08-27 13:47:05,810 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 204 predicate places. [2023-08-27 13:47:05,810 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 215 transitions, 3210 flow [2023-08-27 13:47:05,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 90.20689655172414) internal successors, (2616), 29 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:05,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:05,810 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 1, 1, 1, 1, 1] [2023-08-27 13:47:05,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:06,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-27 13:47:06,016 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:06,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1209860918, now seen corresponding path program 6 times [2023-08-27 13:47:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:06,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193618538] [2023-08-27 13:47:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:06,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:06,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:06,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193618538] [2023-08-27 13:47:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193618538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850823091] [2023-08-27 13:47:06,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:47:06,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:06,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:06,457 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 13:47:06,459 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 13:47:06,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 13:47:06,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:06,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 13:47:06,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:06,826 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 13:47:06,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:06,859 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 23 treesize of output 22 [2023-08-27 13:47:06,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:06,892 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 13:47:06,993 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:06,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:07,202 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:47:07,203 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 33 treesize of output 39 [2023-08-27 13:47:07,208 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:07,208 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 43 treesize of output 37 [2023-08-27 13:47:07,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-27 13:47:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:07,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850823091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:07,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:07,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-27 13:47:07,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655242974] [2023-08-27 13:47:07,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:07,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 13:47:07,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:07,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 13:47:07,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1340, Unknown=16, NotChecked=0, Total=1482 [2023-08-27 13:47:07,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:47:07,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 215 transitions, 3210 flow. Second operand has 39 states, 39 states have (on average 85.1025641025641) internal successors, (3319), 39 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:07,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:07,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:47:07,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:08,386 INFO L124 PetriNetUnfolderBase]: 2143/3405 cut-off events. [2023-08-27 13:47:08,386 INFO L125 PetriNetUnfolderBase]: For 51964/52256 co-relation queries the response was YES. [2023-08-27 13:47:08,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24804 conditions, 3405 events. 2143/3405 cut-off events. For 51964/52256 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17447 event pairs, 805 based on Foata normal form. 290/3628 useless extension candidates. Maximal degree in co-relation 24731. Up to 2990 conditions per place. [2023-08-27 13:47:08,417 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 174 selfloop transitions, 53 changer transitions 0/232 dead transitions. [2023-08-27 13:47:08,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 232 transitions, 3852 flow [2023-08-27 13:47:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 13:47:08,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 13:47:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1492 transitions. [2023-08-27 13:47:08,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3250544662309368 [2023-08-27 13:47:08,419 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1492 transitions. [2023-08-27 13:47:08,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1492 transitions. [2023-08-27 13:47:08,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:08,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1492 transitions. [2023-08-27 13:47:08,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.76470588235294) internal successors, (1492), 17 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:08,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:08,422 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:08,422 INFO L175 Difference]: Start difference. First operand has 243 places, 215 transitions, 3210 flow. Second operand 17 states and 1492 transitions. [2023-08-27 13:47:08,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 232 transitions, 3852 flow [2023-08-27 13:47:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 232 transitions, 3789 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-27 13:47:08,518 INFO L231 Difference]: Finished difference. Result has 251 places, 213 transitions, 3214 flow [2023-08-27 13:47:08,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3214, PETRI_PLACES=251, PETRI_TRANSITIONS=213} [2023-08-27 13:47:08,519 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 212 predicate places. [2023-08-27 13:47:08,519 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 213 transitions, 3214 flow [2023-08-27 13:47:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.1025641025641) internal successors, (3319), 39 states have internal predecessors, (3319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:08,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:08,519 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:08,524 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 13:47:08,721 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,SelfDestructingSolverStorable46 [2023-08-27 13:47:08,721 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:08,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1011233796, now seen corresponding path program 4 times [2023-08-27 13:47:08,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:08,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547856784] [2023-08-27 13:47:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:08,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:09,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547856784] [2023-08-27 13:47:09,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547856784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:09,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835176255] [2023-08-27 13:47:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:47:09,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:09,087 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 13:47:09,090 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 13:47:09,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:47:09,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:09,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:47:09,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:09,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:47:09,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:09,429 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 13:47:09,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:09,456 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 13:47:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:09,597 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:09,739 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1587 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1587) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296)) is different from false [2023-08-27 13:47:09,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:09,800 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 27 treesize of output 28 [2023-08-27 13:47:09,805 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:09,805 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 141 treesize of output 129 [2023-08-27 13:47:09,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-08-27 13:47:09,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:47:09,970 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:09,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835176255] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:09,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:09,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-27 13:47:09,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361379453] [2023-08-27 13:47:09,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:09,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 13:47:09,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:09,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 13:47:09,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1430, Unknown=11, NotChecked=76, Total=1640 [2023-08-27 13:47:09,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:09,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 213 transitions, 3214 flow. Second operand has 41 states, 41 states have (on average 82.09756097560975) internal successors, (3366), 41 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:09,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:09,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:09,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:11,686 INFO L124 PetriNetUnfolderBase]: 2391/3764 cut-off events. [2023-08-27 13:47:11,686 INFO L125 PetriNetUnfolderBase]: For 70325/70627 co-relation queries the response was YES. [2023-08-27 13:47:11,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27704 conditions, 3764 events. 2391/3764 cut-off events. For 70325/70627 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19554 event pairs, 469 based on Foata normal form. 422/4120 useless extension candidates. Maximal degree in co-relation 27632. Up to 1224 conditions per place. [2023-08-27 13:47:11,718 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 253 selfloop transitions, 72 changer transitions 0/330 dead transitions. [2023-08-27 13:47:11,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 330 transitions, 5246 flow [2023-08-27 13:47:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 13:47:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 13:47:11,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1409 transitions. [2023-08-27 13:47:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261574074074074 [2023-08-27 13:47:11,719 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1409 transitions. [2023-08-27 13:47:11,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1409 transitions. [2023-08-27 13:47:11,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:11,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1409 transitions. [2023-08-27 13:47:11,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 88.0625) internal successors, (1409), 16 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:11,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 270.0) internal successors, (4590), 17 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:11,723 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 270.0) internal successors, (4590), 17 states have internal predecessors, (4590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:11,723 INFO L175 Difference]: Start difference. First operand has 251 places, 213 transitions, 3214 flow. Second operand 16 states and 1409 transitions. [2023-08-27 13:47:11,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 330 transitions, 5246 flow [2023-08-27 13:47:11,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 330 transitions, 5168 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-27 13:47:11,823 INFO L231 Difference]: Finished difference. Result has 254 places, 217 transitions, 3415 flow [2023-08-27 13:47:11,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=3136, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3415, PETRI_PLACES=254, PETRI_TRANSITIONS=217} [2023-08-27 13:47:11,823 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 215 predicate places. [2023-08-27 13:47:11,824 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 217 transitions, 3415 flow [2023-08-27 13:47:11,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 82.09756097560975) internal successors, (3366), 41 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:11,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:11,824 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-27 13:47:11,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:12,029 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,SelfDestructingSolverStorable47 [2023-08-27 13:47:12,030 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:12,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:12,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1938750978, now seen corresponding path program 2 times [2023-08-27 13:47:12,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:12,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495462890] [2023-08-27 13:47:12,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:12,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:12,109 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 13:47:12,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:12,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495462890] [2023-08-27 13:47:12,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495462890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:12,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146693509] [2023-08-27 13:47:12,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:47:12,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:12,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:12,111 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 13:47:12,113 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 13:47:12,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:47:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:12,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:47:12,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-08-27 13:47:12,328 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:47:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146693509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:47:12,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:47:12,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2023-08-27 13:47:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961578979] [2023-08-27 13:47:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:47:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:47:12,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:12,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:47:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 13:47:12,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 270 [2023-08-27 13:47:12,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 217 transitions, 3415 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:12,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:12,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 270 [2023-08-27 13:47:12,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:12,814 INFO L124 PetriNetUnfolderBase]: 2015/3170 cut-off events. [2023-08-27 13:47:12,814 INFO L125 PetriNetUnfolderBase]: For 63966/64383 co-relation queries the response was YES. [2023-08-27 13:47:12,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22560 conditions, 3170 events. 2015/3170 cut-off events. For 63966/64383 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 16043 event pairs, 852 based on Foata normal form. 534/3630 useless extension candidates. Maximal degree in co-relation 22486. Up to 3124 conditions per place. [2023-08-27 13:47:12,840 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 192 selfloop transitions, 1 changer transitions 0/210 dead transitions. [2023-08-27 13:47:12,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 210 transitions, 3554 flow [2023-08-27 13:47:12,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:47:12,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:47:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-27 13:47:12,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4148148148148148 [2023-08-27 13:47:12,841 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-27 13:47:12,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-27 13:47:12,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:12,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-27 13:47:12,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:12,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:12,842 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:12,842 INFO L175 Difference]: Start difference. First operand has 254 places, 217 transitions, 3415 flow. Second operand 3 states and 336 transitions. [2023-08-27 13:47:12,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 210 transitions, 3554 flow [2023-08-27 13:47:12,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 210 transitions, 3126 flow, removed 68 selfloop flow, removed 25 redundant places. [2023-08-27 13:47:12,910 INFO L231 Difference]: Finished difference. Result has 212 places, 210 transitions, 2742 flow [2023-08-27 13:47:12,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2742, PETRI_PLACES=212, PETRI_TRANSITIONS=210} [2023-08-27 13:47:12,911 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 173 predicate places. [2023-08-27 13:47:12,911 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 210 transitions, 2742 flow [2023-08-27 13:47:12,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:12,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:12,911 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:12,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-27 13:47:13,116 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 13:47:13,116 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:13,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1011233797, now seen corresponding path program 4 times [2023-08-27 13:47:13,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:13,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436948573] [2023-08-27 13:47:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:13,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:13,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436948573] [2023-08-27 13:47:13,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436948573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:13,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266814368] [2023-08-27 13:47:13,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:47:13,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:13,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:13,487 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 13:47:13,488 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 13:47:13,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:47:13,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:13,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:47:13,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:13,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:47:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:13,853 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 13:47:13,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:13,880 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 13:47:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:14,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:16,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:16,370 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 13:47:16,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:16,375 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 159 treesize of output 147 [2023-08-27 13:47:16,379 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 29 treesize of output 25 [2023-08-27 13:47:16,394 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 20 [2023-08-27 13:47:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:16,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266814368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:16,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:16,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-27 13:47:16,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911955382] [2023-08-27 13:47:16,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:16,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 13:47:16,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 13:47:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1501, Unknown=14, NotChecked=0, Total=1640 [2023-08-27 13:47:16,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:16,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 210 transitions, 2742 flow. Second operand has 41 states, 41 states have (on average 82.09756097560975) internal successors, (3366), 41 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:16,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:16,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:16,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:18,206 INFO L124 PetriNetUnfolderBase]: 2059/3209 cut-off events. [2023-08-27 13:47:18,206 INFO L125 PetriNetUnfolderBase]: For 32348/32595 co-relation queries the response was YES. [2023-08-27 13:47:18,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19984 conditions, 3209 events. 2059/3209 cut-off events. For 32348/32595 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 15934 event pairs, 428 based on Foata normal form. 285/3434 useless extension candidates. Maximal degree in co-relation 19923. Up to 1110 conditions per place. [2023-08-27 13:47:18,231 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 226 selfloop transitions, 70 changer transitions 0/301 dead transitions. [2023-08-27 13:47:18,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 301 transitions, 4166 flow [2023-08-27 13:47:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:47:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:47:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1310 transitions. [2023-08-27 13:47:18,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3234567901234568 [2023-08-27 13:47:18,233 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1310 transitions. [2023-08-27 13:47:18,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1310 transitions. [2023-08-27 13:47:18,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:18,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1310 transitions. [2023-08-27 13:47:18,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.33333333333333) internal successors, (1310), 15 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:18,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:18,236 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:18,236 INFO L175 Difference]: Start difference. First operand has 212 places, 210 transitions, 2742 flow. Second operand 15 states and 1310 transitions. [2023-08-27 13:47:18,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 301 transitions, 4166 flow [2023-08-27 13:47:18,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 301 transitions, 4065 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-27 13:47:18,306 INFO L231 Difference]: Finished difference. Result has 222 places, 209 transitions, 2749 flow [2023-08-27 13:47:18,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2609, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2749, PETRI_PLACES=222, PETRI_TRANSITIONS=209} [2023-08-27 13:47:18,307 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 183 predicate places. [2023-08-27 13:47:18,307 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 209 transitions, 2749 flow [2023-08-27 13:47:18,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 82.09756097560975) internal successors, (3366), 41 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:18,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:18,307 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1] [2023-08-27 13:47:18,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:18,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 13:47:18,513 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:18,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:18,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1938751045, now seen corresponding path program 6 times [2023-08-27 13:47:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:18,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190112952] [2023-08-27 13:47:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:18,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190112952] [2023-08-27 13:47:18,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190112952] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:18,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846362417] [2023-08-27 13:47:18,752 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:47:18,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:18,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:18,757 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 13:47:18,759 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 13:47:18,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 13:47:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:18,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 13:47:18,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:19,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:19,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846362417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:19,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:19,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-27 13:47:19,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691634910] [2023-08-27 13:47:19,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:19,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 13:47:19,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:19,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 13:47:19,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 13:47:19,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:47:19,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 209 transitions, 2749 flow. Second operand has 34 states, 34 states have (on average 90.11764705882354) internal successors, (3064), 34 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:19,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:19,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:47:19,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:19,941 INFO L124 PetriNetUnfolderBase]: 1968/3092 cut-off events. [2023-08-27 13:47:19,941 INFO L125 PetriNetUnfolderBase]: For 26608/26896 co-relation queries the response was YES. [2023-08-27 13:47:19,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18639 conditions, 3092 events. 1968/3092 cut-off events. For 26608/26896 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15735 event pairs, 407 based on Foata normal form. 401/3461 useless extension candidates. Maximal degree in co-relation 18579. Up to 1052 conditions per place. [2023-08-27 13:47:19,962 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 321 selfloop transitions, 105 changer transitions 0/431 dead transitions. [2023-08-27 13:47:19,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 431 transitions, 5839 flow [2023-08-27 13:47:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:47:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:47:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1435 transitions. [2023-08-27 13:47:19,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35432098765432096 [2023-08-27 13:47:19,964 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1435 transitions. [2023-08-27 13:47:19,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1435 transitions. [2023-08-27 13:47:19,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:19,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1435 transitions. [2023-08-27 13:47:19,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 95.66666666666667) internal successors, (1435), 15 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:19,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:19,967 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:19,967 INFO L175 Difference]: Start difference. First operand has 222 places, 209 transitions, 2749 flow. Second operand 15 states and 1435 transitions. [2023-08-27 13:47:19,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 431 transitions, 5839 flow [2023-08-27 13:47:20,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 431 transitions, 5721 flow, removed 4 selfloop flow, removed 14 redundant places. [2023-08-27 13:47:20,027 INFO L231 Difference]: Finished difference. Result has 224 places, 212 transitions, 2864 flow [2023-08-27 13:47:20,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2864, PETRI_PLACES=224, PETRI_TRANSITIONS=212} [2023-08-27 13:47:20,027 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 185 predicate places. [2023-08-27 13:47:20,027 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 212 transitions, 2864 flow [2023-08-27 13:47:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.11764705882354) internal successors, (3064), 34 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:20,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:20,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:20,034 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 13:47:20,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:20,234 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:20,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1121270767, now seen corresponding path program 1 times [2023-08-27 13:47:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:20,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262583955] [2023-08-27 13:47:20,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:20,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:20,314 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 13:47:20,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:20,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262583955] [2023-08-27 13:47:20,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262583955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:20,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919867645] [2023-08-27 13:47:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:20,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:20,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:20,333 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 13:47:20,368 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 13:47:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:20,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 13:47:20,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:20,574 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 13:47:20,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:20,589 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 13:47:20,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919867645] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:20,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 13:47:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-27 13:47:20,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980803809] [2023-08-27 13:47:20,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:47:20,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:47:20,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:20,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:47:20,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-27 13:47:20,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:47:20,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 212 transitions, 2864 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:20,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:20,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:47:20,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:20,956 INFO L124 PetriNetUnfolderBase]: 1716/2675 cut-off events. [2023-08-27 13:47:20,957 INFO L125 PetriNetUnfolderBase]: For 23784/23982 co-relation queries the response was YES. [2023-08-27 13:47:20,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16752 conditions, 2675 events. 1716/2675 cut-off events. For 23784/23982 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 12724 event pairs, 574 based on Foata normal form. 309/2934 useless extension candidates. Maximal degree in co-relation 16692. Up to 2196 conditions per place. [2023-08-27 13:47:20,981 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 195 selfloop transitions, 38 changer transitions 0/238 dead transitions. [2023-08-27 13:47:20,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 238 transitions, 3479 flow [2023-08-27 13:47:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:47:20,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:47:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 475 transitions. [2023-08-27 13:47:20,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2023-08-27 13:47:20,982 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 475 transitions. [2023-08-27 13:47:20,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 475 transitions. [2023-08-27 13:47:20,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:20,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 475 transitions. [2023-08-27 13:47:20,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.0) internal successors, (475), 5 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:20,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:20,984 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:20,984 INFO L175 Difference]: Start difference. First operand has 224 places, 212 transitions, 2864 flow. Second operand 5 states and 475 transitions. [2023-08-27 13:47:20,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 238 transitions, 3479 flow [2023-08-27 13:47:21,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 238 transitions, 3315 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-08-27 13:47:21,048 INFO L231 Difference]: Finished difference. Result has 213 places, 199 transitions, 2537 flow [2023-08-27 13:47:21,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2461, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2537, PETRI_PLACES=213, PETRI_TRANSITIONS=199} [2023-08-27 13:47:21,048 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 174 predicate places. [2023-08-27 13:47:21,049 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 199 transitions, 2537 flow [2023-08-27 13:47:21,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:21,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:21,049 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:21,056 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 13:47:21,251 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,SelfDestructingSolverStorable51 [2023-08-27 13:47:21,251 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:21,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1859858830, now seen corresponding path program 5 times [2023-08-27 13:47:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:21,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836535721] [2023-08-27 13:47:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:21,648 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:21,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:21,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836535721] [2023-08-27 13:47:21,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836535721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:21,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894395087] [2023-08-27 13:47:21,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:47:21,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:21,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:21,653 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 13:47:21,655 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 13:47:21,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 13:47:21,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:21,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 13:47:21,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:22,021 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 13:47:22,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:22,056 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 13:47:22,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:22,086 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 13:47:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:22,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:22,312 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1801 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1801) c_~A~0.base) (+ c_~A~0.offset 16)) 4294967296))) is different from false [2023-08-27 13:47:22,371 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:22,371 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 13:47:22,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:22,378 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 159 treesize of output 147 [2023-08-27 13:47:22,381 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 20 [2023-08-27 13:47:22,386 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 29 treesize of output 25 [2023-08-27 13:47:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:22,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894395087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:22,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:22,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-27 13:47:22,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872889808] [2023-08-27 13:47:22,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:22,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 13:47:22,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 13:47:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1280, Unknown=8, NotChecked=72, Total=1482 [2023-08-27 13:47:22,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:22,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 199 transitions, 2537 flow. Second operand has 39 states, 39 states have (on average 82.17948717948718) internal successors, (3205), 39 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:22,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:22,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:22,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:23,765 INFO L124 PetriNetUnfolderBase]: 2030/3151 cut-off events. [2023-08-27 13:47:23,765 INFO L125 PetriNetUnfolderBase]: For 23418/23476 co-relation queries the response was YES. [2023-08-27 13:47:23,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19598 conditions, 3151 events. 2030/3151 cut-off events. For 23418/23476 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 14759 event pairs, 477 based on Foata normal form. 112/3263 useless extension candidates. Maximal degree in co-relation 19538. Up to 1072 conditions per place. [2023-08-27 13:47:23,791 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 382 selfloop transitions, 25 changer transitions 0/419 dead transitions. [2023-08-27 13:47:23,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 419 transitions, 5662 flow [2023-08-27 13:47:23,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:47:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:47:23,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1311 transitions. [2023-08-27 13:47:23,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3237037037037037 [2023-08-27 13:47:23,793 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1311 transitions. [2023-08-27 13:47:23,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1311 transitions. [2023-08-27 13:47:23,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:23,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1311 transitions. [2023-08-27 13:47:23,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.4) internal successors, (1311), 15 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:23,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:23,796 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:23,796 INFO L175 Difference]: Start difference. First operand has 213 places, 199 transitions, 2537 flow. Second operand 15 states and 1311 transitions. [2023-08-27 13:47:23,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 419 transitions, 5662 flow [2023-08-27 13:47:23,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 419 transitions, 5593 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 13:47:23,861 INFO L231 Difference]: Finished difference. Result has 226 places, 202 transitions, 2620 flow [2023-08-27 13:47:23,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2620, PETRI_PLACES=226, PETRI_TRANSITIONS=202} [2023-08-27 13:47:23,861 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 187 predicate places. [2023-08-27 13:47:23,861 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 202 transitions, 2620 flow [2023-08-27 13:47:23,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 82.17948717948718) internal successors, (3205), 39 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:23,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:23,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:23,867 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 13:47:24,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:24,065 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:24,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:24,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1010136070, now seen corresponding path program 1 times [2023-08-27 13:47:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:24,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070088976] [2023-08-27 13:47:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:24,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:24,141 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 13:47:24,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070088976] [2023-08-27 13:47:24,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070088976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:24,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792504289] [2023-08-27 13:47:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:24,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:24,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:24,144 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 13:47:24,157 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 13:47:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:24,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 13:47:24,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:24,408 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 13:47:24,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:24,430 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 13:47:24,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792504289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:24,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:24,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-27 13:47:24,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394272164] [2023-08-27 13:47:24,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:24,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 13:47:24,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 13:47:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-27 13:47:24,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:47:24,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 202 transitions, 2620 flow. Second operand has 9 states, 9 states have (on average 91.77777777777777) internal successors, (826), 9 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:24,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:24,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:47:24,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:24,866 INFO L124 PetriNetUnfolderBase]: 1861/2872 cut-off events. [2023-08-27 13:47:24,866 INFO L125 PetriNetUnfolderBase]: For 22995/23045 co-relation queries the response was YES. [2023-08-27 13:47:24,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18971 conditions, 2872 events. 1861/2872 cut-off events. For 22995/23045 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 12934 event pairs, 569 based on Foata normal form. 156/3027 useless extension candidates. Maximal degree in co-relation 18909. Up to 2130 conditions per place. [2023-08-27 13:47:24,892 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 251 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2023-08-27 13:47:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 289 transitions, 4054 flow [2023-08-27 13:47:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:47:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:47:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 660 transitions. [2023-08-27 13:47:24,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2023-08-27 13:47:24,893 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 660 transitions. [2023-08-27 13:47:24,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 660 transitions. [2023-08-27 13:47:24,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:24,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 660 transitions. [2023-08-27 13:47:24,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 94.28571428571429) internal successors, (660), 7 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:24,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:24,895 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 270.0) internal successors, (2160), 8 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:24,895 INFO L175 Difference]: Start difference. First operand has 226 places, 202 transitions, 2620 flow. Second operand 7 states and 660 transitions. [2023-08-27 13:47:24,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 289 transitions, 4054 flow [2023-08-27 13:47:24,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 289 transitions, 3944 flow, removed 15 selfloop flow, removed 12 redundant places. [2023-08-27 13:47:24,960 INFO L231 Difference]: Finished difference. Result has 218 places, 197 transitions, 2512 flow [2023-08-27 13:47:24,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2460, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2512, PETRI_PLACES=218, PETRI_TRANSITIONS=197} [2023-08-27 13:47:24,961 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 179 predicate places. [2023-08-27 13:47:24,961 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 197 transitions, 2512 flow [2023-08-27 13:47:24,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 91.77777777777777) internal successors, (826), 9 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:24,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:24,961 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:24,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-08-27 13:47:25,163 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,SelfDestructingSolverStorable53 [2023-08-27 13:47:25,164 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:25,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:25,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1859858831, now seen corresponding path program 7 times [2023-08-27 13:47:25,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:25,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474684793] [2023-08-27 13:47:25,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:25,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:25,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474684793] [2023-08-27 13:47:25,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474684793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:25,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147341740] [2023-08-27 13:47:25,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:47:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:25,629 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 13:47:25,631 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 13:47:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:25,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 13:47:25,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:25,997 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 13:47:26,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:26,030 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 13:47:26,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:26,062 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 13:47:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:26,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:26,407 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:26,407 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 27 treesize of output 28 [2023-08-27 13:47:26,413 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:26,414 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 71 treesize of output 65 [2023-08-27 13:47:26,418 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 24 [2023-08-27 13:47:26,421 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 50 treesize of output 42 [2023-08-27 13:47:26,580 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:26,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147341740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:26,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:26,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-27 13:47:26,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742362356] [2023-08-27 13:47:26,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:26,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 13:47:26,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:26,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 13:47:26,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1346, Unknown=11, NotChecked=0, Total=1482 [2023-08-27 13:47:26,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:26,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 197 transitions, 2512 flow. Second operand has 39 states, 39 states have (on average 82.17948717948718) internal successors, (3205), 39 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:26,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:26,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:26,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:27,769 INFO L124 PetriNetUnfolderBase]: 1766/2723 cut-off events. [2023-08-27 13:47:27,769 INFO L125 PetriNetUnfolderBase]: For 22734/22782 co-relation queries the response was YES. [2023-08-27 13:47:27,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17106 conditions, 2723 events. 1766/2723 cut-off events. For 22734/22782 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 12153 event pairs, 404 based on Foata normal form. 102/2825 useless extension candidates. Maximal degree in co-relation 17049. Up to 919 conditions per place. [2023-08-27 13:47:27,790 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 377 selfloop transitions, 24 changer transitions 0/413 dead transitions. [2023-08-27 13:47:27,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 413 transitions, 5525 flow [2023-08-27 13:47:27,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:47:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:47:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1309 transitions. [2023-08-27 13:47:27,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3232098765432099 [2023-08-27 13:47:27,801 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1309 transitions. [2023-08-27 13:47:27,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1309 transitions. [2023-08-27 13:47:27,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:27,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1309 transitions. [2023-08-27 13:47:27,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.26666666666667) internal successors, (1309), 15 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:27,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:27,805 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:27,805 INFO L175 Difference]: Start difference. First operand has 218 places, 197 transitions, 2512 flow. Second operand 15 states and 1309 transitions. [2023-08-27 13:47:27,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 413 transitions, 5525 flow [2023-08-27 13:47:27,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 413 transitions, 5471 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-08-27 13:47:27,857 INFO L231 Difference]: Finished difference. Result has 227 places, 196 transitions, 2487 flow [2023-08-27 13:47:27,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2487, PETRI_PLACES=227, PETRI_TRANSITIONS=196} [2023-08-27 13:47:27,857 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 188 predicate places. [2023-08-27 13:47:27,858 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 196 transitions, 2487 flow [2023-08-27 13:47:27,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 82.17948717948718) internal successors, (3205), 39 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:27,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:27,858 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2023-08-27 13:47:27,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:28,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:28,063 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:28,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:28,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1149013499, now seen corresponding path program 7 times [2023-08-27 13:47:28,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:28,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019744739] [2023-08-27 13:47:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:28,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:28,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019744739] [2023-08-27 13:47:28,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019744739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:28,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711706418] [2023-08-27 13:47:28,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:47:28,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:28,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:28,461 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 13:47:28,463 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 13:47:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:28,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:47:28,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:28,852 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 13:47:28,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:28,877 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 13:47:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:28,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:29,137 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1930 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1930) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-27 13:47:29,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:29,143 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 24 treesize of output 25 [2023-08-27 13:47:29,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:29,148 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 37 treesize of output 31 [2023-08-27 13:47:29,151 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 7 treesize of output 3 [2023-08-27 13:47:29,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-27 13:47:29,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711706418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:29,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:29,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-27 13:47:29,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551448495] [2023-08-27 13:47:29,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:29,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 13:47:29,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 13:47:29,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1514, Unknown=1, NotChecked=78, Total=1722 [2023-08-27 13:47:29,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:47:29,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 196 transitions, 2487 flow. Second operand has 42 states, 42 states have (on average 85.0952380952381) internal successors, (3574), 42 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:29,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:29,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:47:29,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:30,270 INFO L124 PetriNetUnfolderBase]: 1692/2591 cut-off events. [2023-08-27 13:47:30,270 INFO L125 PetriNetUnfolderBase]: For 23771/23972 co-relation queries the response was YES. [2023-08-27 13:47:30,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16351 conditions, 2591 events. 1692/2591 cut-off events. For 23771/23972 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11267 event pairs, 709 based on Foata normal form. 202/2770 useless extension candidates. Maximal degree in co-relation 16295. Up to 2488 conditions per place. [2023-08-27 13:47:30,291 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 183 selfloop transitions, 37 changer transitions 0/225 dead transitions. [2023-08-27 13:47:30,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 225 transitions, 3339 flow [2023-08-27 13:47:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 13:47:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 13:47:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1576 transitions. [2023-08-27 13:47:30,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242798353909465 [2023-08-27 13:47:30,293 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1576 transitions. [2023-08-27 13:47:30,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1576 transitions. [2023-08-27 13:47:30,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:30,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1576 transitions. [2023-08-27 13:47:30,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.55555555555556) internal successors, (1576), 18 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:30,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:30,296 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:30,296 INFO L175 Difference]: Start difference. First operand has 227 places, 196 transitions, 2487 flow. Second operand 18 states and 1576 transitions. [2023-08-27 13:47:30,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 225 transitions, 3339 flow [2023-08-27 13:47:30,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 225 transitions, 3288 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-27 13:47:30,346 INFO L231 Difference]: Finished difference. Result has 239 places, 207 transitions, 2782 flow [2023-08-27 13:47:30,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2449, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2782, PETRI_PLACES=239, PETRI_TRANSITIONS=207} [2023-08-27 13:47:30,346 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 200 predicate places. [2023-08-27 13:47:30,346 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 207 transitions, 2782 flow [2023-08-27 13:47:30,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 85.0952380952381) internal successors, (3574), 42 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:30,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:30,347 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1] [2023-08-27 13:47:30,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-27 13:47:30,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:30,552 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:30,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1149013500, now seen corresponding path program 7 times [2023-08-27 13:47:30,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:30,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324200116] [2023-08-27 13:47:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:30,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:31,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324200116] [2023-08-27 13:47:31,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324200116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:31,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052838037] [2023-08-27 13:47:31,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:47:31,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:31,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:31,045 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 13:47:31,075 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 13:47:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:31,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:47:31,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:31,444 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 13:47:31,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:31,471 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 13:47:31,600 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:31,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:31,770 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1979 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1979) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456))) is different from false [2023-08-27 13:47:31,775 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:31,776 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 26 treesize of output 27 [2023-08-27 13:47:31,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:31,780 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 43 treesize of output 37 [2023-08-27 13:47:31,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-27 13:47:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-27 13:47:31,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052838037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:31,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:31,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-27 13:47:31,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912392680] [2023-08-27 13:47:31,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:31,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 13:47:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 13:47:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1514, Unknown=1, NotChecked=78, Total=1722 [2023-08-27 13:47:31,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:47:31,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 207 transitions, 2782 flow. Second operand has 42 states, 42 states have (on average 85.0952380952381) internal successors, (3574), 42 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:31,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:31,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:47:31,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:32,901 INFO L124 PetriNetUnfolderBase]: 1691/2589 cut-off events. [2023-08-27 13:47:32,901 INFO L125 PetriNetUnfolderBase]: For 23417/23618 co-relation queries the response was YES. [2023-08-27 13:47:32,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16226 conditions, 2589 events. 1691/2589 cut-off events. For 23417/23618 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11306 event pairs, 709 based on Foata normal form. 202/2768 useless extension candidates. Maximal degree in co-relation 16163. Up to 2487 conditions per place. [2023-08-27 13:47:32,926 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 182 selfloop transitions, 36 changer transitions 0/223 dead transitions. [2023-08-27 13:47:32,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 223 transitions, 3375 flow [2023-08-27 13:47:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 13:47:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 13:47:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1575 transitions. [2023-08-27 13:47:32,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32407407407407407 [2023-08-27 13:47:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1575 transitions. [2023-08-27 13:47:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1575 transitions. [2023-08-27 13:47:32,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:32,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1575 transitions. [2023-08-27 13:47:32,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:32,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:32,932 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:32,932 INFO L175 Difference]: Start difference. First operand has 239 places, 207 transitions, 2782 flow. Second operand 18 states and 1575 transitions. [2023-08-27 13:47:32,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 223 transitions, 3375 flow [2023-08-27 13:47:32,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 223 transitions, 3307 flow, removed 18 selfloop flow, removed 9 redundant places. [2023-08-27 13:47:32,983 INFO L231 Difference]: Finished difference. Result has 247 places, 205 transitions, 2744 flow [2023-08-27 13:47:32,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2744, PETRI_PLACES=247, PETRI_TRANSITIONS=205} [2023-08-27 13:47:32,984 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 208 predicate places. [2023-08-27 13:47:32,984 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 205 transitions, 2744 flow [2023-08-27 13:47:32,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 85.0952380952381) internal successors, (3574), 42 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:32,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:32,984 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:32,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:33,189 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,SelfDestructingSolverStorable56 [2023-08-27 13:47:33,190 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:33,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:33,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1821044635, now seen corresponding path program 6 times [2023-08-27 13:47:33,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:33,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013341725] [2023-08-27 13:47:33,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:33,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:33,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:33,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013341725] [2023-08-27 13:47:33,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013341725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:33,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289171214] [2023-08-27 13:47:33,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:47:33,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:33,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:33,334 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 13:47:33,336 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 13:47:33,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 13:47:33,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:33,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 13:47:33,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:33,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:33,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:33,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289171214] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:33,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:33,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2023-08-27 13:47:33,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136725610] [2023-08-27 13:47:33,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:33,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 13:47:33,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 13:47:33,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=836, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 13:47:33,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:47:33,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 205 transitions, 2744 flow. Second operand has 34 states, 34 states have (on average 90.17647058823529) internal successors, (3066), 34 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:33,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:33,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:47:33,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:34,467 INFO L124 PetriNetUnfolderBase]: 1611/2493 cut-off events. [2023-08-27 13:47:34,467 INFO L125 PetriNetUnfolderBase]: For 21533/21631 co-relation queries the response was YES. [2023-08-27 13:47:34,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 2493 events. 1611/2493 cut-off events. For 21533/21631 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11055 event pairs, 352 based on Foata normal form. 182/2674 useless extension candidates. Maximal degree in co-relation 14974. Up to 783 conditions per place. [2023-08-27 13:47:34,488 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 382 selfloop transitions, 52 changer transitions 0/446 dead transitions. [2023-08-27 13:47:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 446 transitions, 5654 flow [2023-08-27 13:47:34,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:47:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:47:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1420 transitions. [2023-08-27 13:47:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3506172839506173 [2023-08-27 13:47:34,489 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1420 transitions. [2023-08-27 13:47:34,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1420 transitions. [2023-08-27 13:47:34,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:34,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1420 transitions. [2023-08-27 13:47:34,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 94.66666666666667) internal successors, (1420), 15 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:34,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:34,492 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 270.0) internal successors, (4320), 16 states have internal predecessors, (4320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:34,492 INFO L175 Difference]: Start difference. First operand has 247 places, 205 transitions, 2744 flow. Second operand 15 states and 1420 transitions. [2023-08-27 13:47:34,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 446 transitions, 5654 flow [2023-08-27 13:47:34,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 446 transitions, 5594 flow, removed 0 selfloop flow, removed 15 redundant places. [2023-08-27 13:47:34,538 INFO L231 Difference]: Finished difference. Result has 253 places, 217 transitions, 3019 flow [2023-08-27 13:47:34,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2684, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3019, PETRI_PLACES=253, PETRI_TRANSITIONS=217} [2023-08-27 13:47:34,539 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 214 predicate places. [2023-08-27 13:47:34,539 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 217 transitions, 3019 flow [2023-08-27 13:47:34,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 90.17647058823529) internal successors, (3066), 34 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:34,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:34,540 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:34,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:34,745 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,SelfDestructingSolverStorable57 [2023-08-27 13:47:34,745 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:34,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:34,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1723554518, now seen corresponding path program 5 times [2023-08-27 13:47:34,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:34,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483844513] [2023-08-27 13:47:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:34,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:35,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483844513] [2023-08-27 13:47:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483844513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:35,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266873912] [2023-08-27 13:47:35,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:47:35,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:35,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:35,228 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 13:47:35,231 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 13:47:35,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 13:47:35,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:35,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 13:47:35,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:35,646 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 13:47:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:35,679 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 13:47:35,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:35,708 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 13:47:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:35,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:36,031 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2079 (Array Int Int)) (v_ArrVal_2078 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2078) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2079) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 20 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-27 13:47:36,036 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:36,036 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 27 treesize of output 28 [2023-08-27 13:47:36,041 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:36,041 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 141 treesize of output 129 [2023-08-27 13:47:36,044 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 25 treesize of output 21 [2023-08-27 13:47:36,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:47:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-08-27 13:47:36,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266873912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:36,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:36,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-27 13:47:36,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254440099] [2023-08-27 13:47:36,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 13:47:36,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 13:47:36,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1746, Unknown=8, NotChecked=84, Total=1980 [2023-08-27 13:47:36,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:36,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 217 transitions, 3019 flow. Second operand has 45 states, 45 states have (on average 82.11111111111111) internal successors, (3695), 45 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:36,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:36,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:36,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:37,780 INFO L124 PetriNetUnfolderBase]: 1636/2513 cut-off events. [2023-08-27 13:47:37,780 INFO L125 PetriNetUnfolderBase]: For 30510/30745 co-relation queries the response was YES. [2023-08-27 13:47:37,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17303 conditions, 2513 events. 1636/2513 cut-off events. For 30510/30745 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 10958 event pairs, 501 based on Foata normal form. 254/2744 useless extension candidates. Maximal degree in co-relation 17233. Up to 1581 conditions per place. [2023-08-27 13:47:37,806 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 286 selfloop transitions, 40 changer transitions 0/332 dead transitions. [2023-08-27 13:47:37,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 332 transitions, 5063 flow [2023-08-27 13:47:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 13:47:37,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 13:47:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1483 transitions. [2023-08-27 13:47:37,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32309368191721133 [2023-08-27 13:47:37,807 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1483 transitions. [2023-08-27 13:47:37,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1483 transitions. [2023-08-27 13:47:37,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:37,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1483 transitions. [2023-08-27 13:47:37,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.23529411764706) internal successors, (1483), 17 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:37,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:37,811 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:37,811 INFO L175 Difference]: Start difference. First operand has 253 places, 217 transitions, 3019 flow. Second operand 17 states and 1483 transitions. [2023-08-27 13:47:37,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 332 transitions, 5063 flow [2023-08-27 13:47:37,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 332 transitions, 5028 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-27 13:47:37,886 INFO L231 Difference]: Finished difference. Result has 264 places, 220 transitions, 3160 flow [2023-08-27 13:47:37,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3160, PETRI_PLACES=264, PETRI_TRANSITIONS=220} [2023-08-27 13:47:37,886 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 225 predicate places. [2023-08-27 13:47:37,886 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 220 transitions, 3160 flow [2023-08-27 13:47:37,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 82.11111111111111) internal successors, (3695), 45 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:37,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:37,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:37,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:38,093 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,SelfDestructingSolverStorable58 [2023-08-27 13:47:38,093 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:38,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:38,093 INFO L85 PathProgramCache]: Analyzing trace with hash 936041815, now seen corresponding path program 1 times [2023-08-27 13:47:38,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:38,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560042735] [2023-08-27 13:47:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:38,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560042735] [2023-08-27 13:47:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560042735] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771317495] [2023-08-27 13:47:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:38,351 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:38,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-27 13:47:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:38,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 13:47:38,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:38,645 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 13:47:38,668 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 13:47:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:38,769 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 23 treesize of output 23 [2023-08-27 13:47:38,829 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 43 [2023-08-27 13:47:38,841 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 13:47:38,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:39,101 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2113 (Array Int Int)) (v_ArrVal_2112 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2112))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (select (select (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2113) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (= (+ c_~counter~0 .cse0) .cse1) (< (+ 9223372039002259455 .cse0) 0) (< 9223372039002259455 .cse1))))) is different from false [2023-08-27 13:47:39,107 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:39,108 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 96 treesize of output 60 [2023-08-27 13:47:39,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 214 treesize of output 190 [2023-08-27 13:47:39,115 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 62 treesize of output 56 [2023-08-27 13:47:39,123 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 95 treesize of output 87 [2023-08-27 13:47:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 13:47:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771317495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:39,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:39,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2023-08-27 13:47:39,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177454253] [2023-08-27 13:47:39,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:39,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 13:47:39,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:39,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 13:47:39,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=373, Unknown=6, NotChecked=40, Total=506 [2023-08-27 13:47:39,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:47:39,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 220 transitions, 3160 flow. Second operand has 23 states, 23 states have (on average 74.6086956521739) internal successors, (1716), 23 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:39,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:39,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:47:39,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:39,999 INFO L124 PetriNetUnfolderBase]: 2056/3248 cut-off events. [2023-08-27 13:47:39,999 INFO L125 PetriNetUnfolderBase]: For 30347/30347 co-relation queries the response was YES. [2023-08-27 13:47:40,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21909 conditions, 3248 events. 2056/3248 cut-off events. For 30347/30347 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15534 event pairs, 208 based on Foata normal form. 6/3254 useless extension candidates. Maximal degree in co-relation 21837. Up to 2557 conditions per place. [2023-08-27 13:47:40,036 INFO L140 encePairwiseOnDemand]: 260/270 looper letters, 261 selfloop transitions, 103 changer transitions 8/372 dead transitions. [2023-08-27 13:47:40,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 372 transitions, 5678 flow [2023-08-27 13:47:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:47:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:47:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 878 transitions. [2023-08-27 13:47:40,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2956228956228956 [2023-08-27 13:47:40,038 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 878 transitions. [2023-08-27 13:47:40,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 878 transitions. [2023-08-27 13:47:40,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:40,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 878 transitions. [2023-08-27 13:47:40,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 79.81818181818181) internal successors, (878), 11 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:40,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:40,040 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:40,040 INFO L175 Difference]: Start difference. First operand has 264 places, 220 transitions, 3160 flow. Second operand 11 states and 878 transitions. [2023-08-27 13:47:40,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 372 transitions, 5678 flow [2023-08-27 13:47:40,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 372 transitions, 5547 flow, removed 20 selfloop flow, removed 13 redundant places. [2023-08-27 13:47:40,132 INFO L231 Difference]: Finished difference. Result has 266 places, 285 transitions, 4202 flow [2023-08-27 13:47:40,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4202, PETRI_PLACES=266, PETRI_TRANSITIONS=285} [2023-08-27 13:47:40,132 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 227 predicate places. [2023-08-27 13:47:40,132 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 285 transitions, 4202 flow [2023-08-27 13:47:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 74.6086956521739) internal successors, (1716), 23 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:40,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:40,133 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:40,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-27 13:47:40,340 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:40,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1723554517, now seen corresponding path program 5 times [2023-08-27 13:47:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:40,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463828691] [2023-08-27 13:47:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:40,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463828691] [2023-08-27 13:47:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463828691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:40,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980132777] [2023-08-27 13:47:40,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:47:40,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:40,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:40,787 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:40,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-27 13:47:41,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 13:47:41,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:41,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 13:47:41,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:41,224 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 13:47:41,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:41,260 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 13:47:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:41,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 13:47:41,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:41,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:41,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:41,676 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 13:47:41,681 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:41,681 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 81 treesize of output 75 [2023-08-27 13:47:41,684 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 62 treesize of output 54 [2023-08-27 13:47:41,687 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 24 [2023-08-27 13:47:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980132777] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:41,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:41,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-27 13:47:41,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774031726] [2023-08-27 13:47:41,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:41,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 13:47:41,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 13:47:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1822, Unknown=13, NotChecked=0, Total=1980 [2023-08-27 13:47:41,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:41,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 285 transitions, 4202 flow. Second operand has 45 states, 45 states have (on average 82.11111111111111) internal successors, (3695), 45 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:41,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:41,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:41,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:43,216 INFO L124 PetriNetUnfolderBase]: 1826/2890 cut-off events. [2023-08-27 13:47:43,217 INFO L125 PetriNetUnfolderBase]: For 36584/36765 co-relation queries the response was YES. [2023-08-27 13:47:43,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20326 conditions, 2890 events. 1826/2890 cut-off events. For 36584/36765 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 13732 event pairs, 478 based on Foata normal form. 193/3039 useless extension candidates. Maximal degree in co-relation 20249. Up to 1867 conditions per place. [2023-08-27 13:47:43,241 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 335 selfloop transitions, 50 changer transitions 0/396 dead transitions. [2023-08-27 13:47:43,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 396 transitions, 6353 flow [2023-08-27 13:47:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 13:47:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 13:47:43,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1482 transitions. [2023-08-27 13:47:43,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32287581699346407 [2023-08-27 13:47:43,243 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1482 transitions. [2023-08-27 13:47:43,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1482 transitions. [2023-08-27 13:47:43,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:43,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1482 transitions. [2023-08-27 13:47:43,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.17647058823529) internal successors, (1482), 17 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:43,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:43,247 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:43,247 INFO L175 Difference]: Start difference. First operand has 266 places, 285 transitions, 4202 flow. Second operand 17 states and 1482 transitions. [2023-08-27 13:47:43,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 396 transitions, 6353 flow [2023-08-27 13:47:43,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 396 transitions, 6226 flow, removed 40 selfloop flow, removed 3 redundant places. [2023-08-27 13:47:43,331 INFO L231 Difference]: Finished difference. Result has 279 places, 283 transitions, 4111 flow [2023-08-27 13:47:43,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=4011, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4111, PETRI_PLACES=279, PETRI_TRANSITIONS=283} [2023-08-27 13:47:43,332 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 240 predicate places. [2023-08-27 13:47:43,332 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 283 transitions, 4111 flow [2023-08-27 13:47:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 82.11111111111111) internal successors, (3695), 45 states have internal predecessors, (3695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:43,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:43,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:43,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:43,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:43,537 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:43,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:43,537 INFO L85 PathProgramCache]: Analyzing trace with hash -95727609, now seen corresponding path program 2 times [2023-08-27 13:47:43,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:43,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240032206] [2023-08-27 13:47:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:43,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:43,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:43,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240032206] [2023-08-27 13:47:43,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240032206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:43,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752281141] [2023-08-27 13:47:43,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:47:43,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:43,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:43,776 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:43,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-27 13:47:44,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:47:44,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:44,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:47:44,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:44,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 59 [2023-08-27 13:47:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:44,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:44,299 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:44,299 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 154 treesize of output 130 [2023-08-27 13:47:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752281141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:44,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:44,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-08-27 13:47:44,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086837060] [2023-08-27 13:47:44,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:44,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 13:47:44,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:44,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 13:47:44,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-27 13:47:44,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 270 [2023-08-27 13:47:44,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 283 transitions, 4111 flow. Second operand has 12 states, 12 states have (on average 88.75) internal successors, (1065), 12 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:44,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:44,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 270 [2023-08-27 13:47:44,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:44,950 INFO L124 PetriNetUnfolderBase]: 2140/3402 cut-off events. [2023-08-27 13:47:44,950 INFO L125 PetriNetUnfolderBase]: For 32510/32510 co-relation queries the response was YES. [2023-08-27 13:47:44,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3402 events. 2140/3402 cut-off events. For 32510/32510 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16641 event pairs, 380 based on Foata normal form. 6/3408 useless extension candidates. Maximal degree in co-relation 23426. Up to 2987 conditions per place. [2023-08-27 13:47:44,978 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 285 selfloop transitions, 86 changer transitions 6/377 dead transitions. [2023-08-27 13:47:44,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 377 transitions, 5968 flow [2023-08-27 13:47:44,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:47:44,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:47:44,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 747 transitions. [2023-08-27 13:47:44,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3458333333333333 [2023-08-27 13:47:44,980 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 747 transitions. [2023-08-27 13:47:44,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 747 transitions. [2023-08-27 13:47:44,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:44,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 747 transitions. [2023-08-27 13:47:44,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.375) internal successors, (747), 8 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:44,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:44,982 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:44,982 INFO L175 Difference]: Start difference. First operand has 279 places, 283 transitions, 4111 flow. Second operand 8 states and 747 transitions. [2023-08-27 13:47:44,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 377 transitions, 5968 flow [2023-08-27 13:47:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 377 transitions, 5853 flow, removed 0 selfloop flow, removed 15 redundant places. [2023-08-27 13:47:45,095 INFO L231 Difference]: Finished difference. Result has 274 places, 323 transitions, 4817 flow [2023-08-27 13:47:45,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=4017, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4817, PETRI_PLACES=274, PETRI_TRANSITIONS=323} [2023-08-27 13:47:45,096 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 235 predicate places. [2023-08-27 13:47:45,096 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 323 transitions, 4817 flow [2023-08-27 13:47:45,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.75) internal successors, (1065), 12 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:45,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:45,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:45,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:45,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:45,301 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:45,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash -698199819, now seen corresponding path program 3 times [2023-08-27 13:47:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:45,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968163617] [2023-08-27 13:47:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:45,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:45,519 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:45,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:45,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968163617] [2023-08-27 13:47:45,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968163617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:45,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896200510] [2023-08-27 13:47:45,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:47:45,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:45,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:45,521 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:45,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-27 13:47:45,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 13:47:45,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:45,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:47:45,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:45,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2023-08-27 13:47:45,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:45,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:46,054 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:46,055 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 118 treesize of output 86 [2023-08-27 13:47:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896200510] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:46,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:46,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 10 [2023-08-27 13:47:46,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843331660] [2023-08-27 13:47:46,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:46,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 13:47:46,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:46,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 13:47:46,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-27 13:47:46,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 270 [2023-08-27 13:47:46,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 323 transitions, 4817 flow. Second operand has 12 states, 12 states have (on average 88.66666666666667) internal successors, (1064), 12 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:46,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:46,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 270 [2023-08-27 13:47:46,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:46,774 INFO L124 PetriNetUnfolderBase]: 2250/3599 cut-off events. [2023-08-27 13:47:46,774 INFO L125 PetriNetUnfolderBase]: For 35533/35533 co-relation queries the response was YES. [2023-08-27 13:47:46,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25305 conditions, 3599 events. 2250/3599 cut-off events. For 35533/35533 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17916 event pairs, 424 based on Foata normal form. 6/3605 useless extension candidates. Maximal degree in co-relation 25226. Up to 3217 conditions per place. [2023-08-27 13:47:46,805 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 300 selfloop transitions, 84 changer transitions 9/393 dead transitions. [2023-08-27 13:47:46,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 393 transitions, 6417 flow [2023-08-27 13:47:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:47:46,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:47:46,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 745 transitions. [2023-08-27 13:47:46,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449074074074074 [2023-08-27 13:47:46,807 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 745 transitions. [2023-08-27 13:47:46,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 745 transitions. [2023-08-27 13:47:46,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:46,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 745 transitions. [2023-08-27 13:47:46,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.125) internal successors, (745), 8 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:46,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:46,809 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:46,809 INFO L175 Difference]: Start difference. First operand has 274 places, 323 transitions, 4817 flow. Second operand 8 states and 745 transitions. [2023-08-27 13:47:46,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 393 transitions, 6417 flow [2023-08-27 13:47:46,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 393 transitions, 6291 flow, removed 28 selfloop flow, removed 3 redundant places. [2023-08-27 13:47:46,936 INFO L231 Difference]: Finished difference. Result has 280 places, 341 transitions, 5163 flow [2023-08-27 13:47:46,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=4691, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5163, PETRI_PLACES=280, PETRI_TRANSITIONS=341} [2023-08-27 13:47:46,936 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 241 predicate places. [2023-08-27 13:47:46,936 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 341 transitions, 5163 flow [2023-08-27 13:47:46,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.66666666666667) internal successors, (1064), 12 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:46,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:46,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:46,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:47,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:47,141 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:47,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:47,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2101731519, now seen corresponding path program 4 times [2023-08-27 13:47:47,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:47,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524231428] [2023-08-27 13:47:47,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:47,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524231428] [2023-08-27 13:47:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524231428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:47,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306112621] [2023-08-27 13:47:47,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:47:47,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:47,351 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:47,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-27 13:47:47,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:47:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:47,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 13:47:47,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:47,645 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 13:47:47,667 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 13:47:47,687 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 13:47:47,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 59 [2023-08-27 13:47:47,831 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 13:47:47,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:48,081 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:48,081 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 53 treesize of output 41 [2023-08-27 13:47:48,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 103 [2023-08-27 13:47:48,085 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 103 treesize of output 95 [2023-08-27 13:47:48,088 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 49 treesize of output 45 [2023-08-27 13:47:48,106 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 13:47:48,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306112621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:48,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:48,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 16 [2023-08-27 13:47:48,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047072008] [2023-08-27 13:47:48,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:48,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 13:47:48,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 13:47:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=226, Unknown=2, NotChecked=0, Total=306 [2023-08-27 13:47:48,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:47:48,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 341 transitions, 5163 flow. Second operand has 18 states, 18 states have (on average 75.05555555555556) internal successors, (1351), 18 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:48,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:48,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:47:48,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:48,998 INFO L124 PetriNetUnfolderBase]: 2338/3773 cut-off events. [2023-08-27 13:47:48,999 INFO L125 PetriNetUnfolderBase]: For 38400/38400 co-relation queries the response was YES. [2023-08-27 13:47:49,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26934 conditions, 3773 events. 2338/3773 cut-off events. For 38400/38400 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 19350 event pairs, 484 based on Foata normal form. 6/3779 useless extension candidates. Maximal degree in co-relation 26852. Up to 3300 conditions per place. [2023-08-27 13:47:49,026 INFO L140 encePairwiseOnDemand]: 257/270 looper letters, 320 selfloop transitions, 116 changer transitions 8/444 dead transitions. [2023-08-27 13:47:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 444 transitions, 7354 flow [2023-08-27 13:47:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:47:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:47:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 876 transitions. [2023-08-27 13:47:49,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29494949494949496 [2023-08-27 13:47:49,028 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 876 transitions. [2023-08-27 13:47:49,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 876 transitions. [2023-08-27 13:47:49,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:49,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 876 transitions. [2023-08-27 13:47:49,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 79.63636363636364) internal successors, (876), 11 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:49,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:49,030 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:49,030 INFO L175 Difference]: Start difference. First operand has 280 places, 341 transitions, 5163 flow. Second operand 11 states and 876 transitions. [2023-08-27 13:47:49,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 444 transitions, 7354 flow [2023-08-27 13:47:49,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 444 transitions, 7122 flow, removed 52 selfloop flow, removed 6 redundant places. [2023-08-27 13:47:49,168 INFO L231 Difference]: Finished difference. Result has 291 places, 390 transitions, 6131 flow [2023-08-27 13:47:49,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=4953, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6131, PETRI_PLACES=291, PETRI_TRANSITIONS=390} [2023-08-27 13:47:49,169 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 252 predicate places. [2023-08-27 13:47:49,169 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 390 transitions, 6131 flow [2023-08-27 13:47:49,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.05555555555556) internal successors, (1351), 18 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:49,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:49,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:49,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:49,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:49,374 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:49,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:49,375 INFO L85 PathProgramCache]: Analyzing trace with hash 407525567, now seen corresponding path program 5 times [2023-08-27 13:47:49,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:49,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467867043] [2023-08-27 13:47:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:49,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:49,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:49,763 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 13:47:49,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:49,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467867043] [2023-08-27 13:47:49,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467867043] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:49,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325553328] [2023-08-27 13:47:49,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:47:49,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:49,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:49,764 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:49,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-27 13:47:50,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:47:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:50,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:47:50,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:50,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2023-08-27 13:47:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:50,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:50,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:50,327 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 118 treesize of output 86 [2023-08-27 13:47:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:50,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325553328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:50,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:50,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 13 [2023-08-27 13:47:50,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054058426] [2023-08-27 13:47:50,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:50,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 13:47:50,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 13:47:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-27 13:47:50,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:47:50,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 390 transitions, 6131 flow. Second operand has 15 states, 15 states have (on average 75.46666666666667) internal successors, (1132), 15 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:50,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:50,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:47:50,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:51,247 INFO L124 PetriNetUnfolderBase]: 2438/3945 cut-off events. [2023-08-27 13:47:51,247 INFO L125 PetriNetUnfolderBase]: For 45051/45051 co-relation queries the response was YES. [2023-08-27 13:47:51,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29266 conditions, 3945 events. 2438/3945 cut-off events. For 45051/45051 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20622 event pairs, 538 based on Foata normal form. 6/3951 useless extension candidates. Maximal degree in co-relation 29177. Up to 3583 conditions per place. [2023-08-27 13:47:51,283 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 350 selfloop transitions, 88 changer transitions 7/445 dead transitions. [2023-08-27 13:47:51,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 445 transitions, 7726 flow [2023-08-27 13:47:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:47:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:47:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2023-08-27 13:47:51,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2934156378600823 [2023-08-27 13:47:51,285 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 713 transitions. [2023-08-27 13:47:51,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 713 transitions. [2023-08-27 13:47:51,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:51,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 713 transitions. [2023-08-27 13:47:51,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.22222222222223) internal successors, (713), 9 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:51,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:51,287 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:51,287 INFO L175 Difference]: Start difference. First operand has 291 places, 390 transitions, 6131 flow. Second operand 9 states and 713 transitions. [2023-08-27 13:47:51,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 445 transitions, 7726 flow [2023-08-27 13:47:51,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 445 transitions, 7544 flow, removed 90 selfloop flow, removed 1 redundant places. [2023-08-27 13:47:51,465 INFO L231 Difference]: Finished difference. Result has 300 places, 408 transitions, 6494 flow [2023-08-27 13:47:51,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6494, PETRI_PLACES=300, PETRI_TRANSITIONS=408} [2023-08-27 13:47:51,466 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 261 predicate places. [2023-08-27 13:47:51,466 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 408 transitions, 6494 flow [2023-08-27 13:47:51,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 75.46666666666667) internal successors, (1132), 15 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:51,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:51,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:51,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-08-27 13:47:51,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:51,671 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:51,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:51,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1881443837, now seen corresponding path program 6 times [2023-08-27 13:47:51,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:51,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451790995] [2023-08-27 13:47:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:51,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:51,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:51,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:51,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451790995] [2023-08-27 13:47:51,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451790995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:51,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114895215] [2023-08-27 13:47:51,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:47:51,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:51,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:51,866 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:51,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-27 13:47:52,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 13:47:52,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:52,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 13:47:52,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:52,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2023-08-27 13:47:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:52,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:52,461 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:52,462 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 106 treesize of output 86 [2023-08-27 13:47:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:47:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114895215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:52,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:52,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2023-08-27 13:47:52,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607480559] [2023-08-27 13:47:52,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:52,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:47:52,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:52,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:47:52,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:47:52,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 270 [2023-08-27 13:47:52,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 408 transitions, 6494 flow. Second operand has 13 states, 13 states have (on average 88.53846153846153) internal successors, (1151), 13 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:52,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:52,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 270 [2023-08-27 13:47:52,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:53,355 INFO L124 PetriNetUnfolderBase]: 2480/4042 cut-off events. [2023-08-27 13:47:53,355 INFO L125 PetriNetUnfolderBase]: For 47038/47038 co-relation queries the response was YES. [2023-08-27 13:47:53,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30177 conditions, 4042 events. 2480/4042 cut-off events. For 47038/47038 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21495 event pairs, 498 based on Foata normal form. 6/4048 useless extension candidates. Maximal degree in co-relation 30085. Up to 3569 conditions per place. [2023-08-27 13:47:53,395 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 354 selfloop transitions, 111 changer transitions 11/476 dead transitions. [2023-08-27 13:47:53,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 476 transitions, 8428 flow [2023-08-27 13:47:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 13:47:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 13:47:53,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 745 transitions. [2023-08-27 13:47:53,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449074074074074 [2023-08-27 13:47:53,396 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 745 transitions. [2023-08-27 13:47:53,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 745 transitions. [2023-08-27 13:47:53,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:53,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 745 transitions. [2023-08-27 13:47:53,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.125) internal successors, (745), 8 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:53,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:53,398 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 270.0) internal successors, (2430), 9 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:53,398 INFO L175 Difference]: Start difference. First operand has 300 places, 408 transitions, 6494 flow. Second operand 8 states and 745 transitions. [2023-08-27 13:47:53,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 476 transitions, 8428 flow [2023-08-27 13:47:53,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 476 transitions, 8200 flow, removed 83 selfloop flow, removed 4 redundant places. [2023-08-27 13:47:53,598 INFO L231 Difference]: Finished difference. Result has 306 places, 430 transitions, 7071 flow [2023-08-27 13:47:53,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7071, PETRI_PLACES=306, PETRI_TRANSITIONS=430} [2023-08-27 13:47:53,598 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 267 predicate places. [2023-08-27 13:47:53,598 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 430 transitions, 7071 flow [2023-08-27 13:47:53,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.53846153846153) internal successors, (1151), 13 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:53,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:53,599 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2023-08-27 13:47:53,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-27 13:47:53,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-27 13:47:53,804 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:53,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1259676426, now seen corresponding path program 8 times [2023-08-27 13:47:53,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:53,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622228117] [2023-08-27 13:47:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:53,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:54,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622228117] [2023-08-27 13:47:54,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622228117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:54,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390807019] [2023-08-27 13:47:54,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:47:54,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:54,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:54,009 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:54,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-27 13:47:54,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:47:54,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:47:54,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 13:47:54,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:54,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390807019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:54,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:54,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-27 13:47:54,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919001768] [2023-08-27 13:47:54,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:54,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 13:47:54,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 13:47:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-27 13:47:54,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:47:54,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 430 transitions, 7071 flow. Second operand has 39 states, 39 states have (on average 90.1025641025641) internal successors, (3514), 39 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:54,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:54,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:47:54,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:55,913 INFO L124 PetriNetUnfolderBase]: 2924/4750 cut-off events. [2023-08-27 13:47:55,913 INFO L125 PetriNetUnfolderBase]: For 73393/73555 co-relation queries the response was YES. [2023-08-27 13:47:55,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36772 conditions, 4750 events. 2924/4750 cut-off events. For 73393/73555 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 26337 event pairs, 573 based on Foata normal form. 220/4940 useless extension candidates. Maximal degree in co-relation 36676. Up to 1554 conditions per place. [2023-08-27 13:47:55,971 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 565 selfloop transitions, 230 changer transitions 0/816 dead transitions. [2023-08-27 13:47:55,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 816 transitions, 14454 flow [2023-08-27 13:47:55,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 13:47:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 13:47:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1622 transitions. [2023-08-27 13:47:55,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3533769063180828 [2023-08-27 13:47:55,973 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1622 transitions. [2023-08-27 13:47:55,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1622 transitions. [2023-08-27 13:47:55,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:55,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1622 transitions. [2023-08-27 13:47:55,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 95.41176470588235) internal successors, (1622), 17 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:55,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:55,976 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:55,976 INFO L175 Difference]: Start difference. First operand has 306 places, 430 transitions, 7071 flow. Second operand 17 states and 1622 transitions. [2023-08-27 13:47:55,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 816 transitions, 14454 flow [2023-08-27 13:47:56,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 816 transitions, 13238 flow, removed 240 selfloop flow, removed 12 redundant places. [2023-08-27 13:47:56,238 INFO L231 Difference]: Finished difference. Result has 313 places, 493 transitions, 8127 flow [2023-08-27 13:47:56,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8127, PETRI_PLACES=313, PETRI_TRANSITIONS=493} [2023-08-27 13:47:56,238 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 274 predicate places. [2023-08-27 13:47:56,238 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 493 transitions, 8127 flow [2023-08-27 13:47:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 90.1025641025641) internal successors, (3514), 39 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:56,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:47:56,239 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:47:56,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2023-08-27 13:47:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-27 13:47:56,445 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:47:56,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:47:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1202492975, now seen corresponding path program 7 times [2023-08-27 13:47:56,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:47:56,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133212536] [2023-08-27 13:47:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:47:56,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:47:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:56,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:47:56,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133212536] [2023-08-27 13:47:56,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133212536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:47:56,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888942464] [2023-08-27 13:47:56,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:47:56,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:47:56,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:47:56,819 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:47:56,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-27 13:47:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:47:57,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 13:47:57,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:47:57,301 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:47:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:57,337 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 13:47:57,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:47:57,367 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 13:47:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:57,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:47:57,659 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2421 (Array Int Int))) (< 0 (+ 4294967296 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2421) c_~A~0.base) (+ c_~A~0.offset 20))))) is different from false [2023-08-27 13:47:57,709 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:57,709 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 13:47:57,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:47:57,715 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 159 treesize of output 147 [2023-08-27 13:47:57,717 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 20 [2023-08-27 13:47:57,720 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 29 treesize of output 25 [2023-08-27 13:47:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:47:57,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888942464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:47:57,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:47:57,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-27 13:47:57,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873382453] [2023-08-27 13:47:57,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:47:57,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 13:47:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:47:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 13:47:57,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1748, Unknown=6, NotChecked=84, Total=1980 [2023-08-27 13:47:57,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:47:57,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 493 transitions, 8127 flow. Second operand has 45 states, 45 states have (on average 82.15555555555555) internal successors, (3697), 45 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:57,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:47:57,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:47:57,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:47:59,922 INFO L124 PetriNetUnfolderBase]: 3280/5340 cut-off events. [2023-08-27 13:47:59,922 INFO L125 PetriNetUnfolderBase]: For 70937/70970 co-relation queries the response was YES. [2023-08-27 13:47:59,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42554 conditions, 5340 events. 3280/5340 cut-off events. For 70937/70970 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 29736 event pairs, 880 based on Foata normal form. 66/5399 useless extension candidates. Maximal degree in co-relation 42451. Up to 2621 conditions per place. [2023-08-27 13:47:59,973 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 671 selfloop transitions, 59 changer transitions 0/760 dead transitions. [2023-08-27 13:47:59,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 760 transitions, 13861 flow [2023-08-27 13:47:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 13:47:59,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 13:47:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1482 transitions. [2023-08-27 13:47:59,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32287581699346407 [2023-08-27 13:47:59,975 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1482 transitions. [2023-08-27 13:47:59,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1482 transitions. [2023-08-27 13:47:59,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:47:59,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1482 transitions. [2023-08-27 13:47:59,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 87.17647058823529) internal successors, (1482), 17 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:59,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:59,978 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:47:59,978 INFO L175 Difference]: Start difference. First operand has 313 places, 493 transitions, 8127 flow. Second operand 17 states and 1482 transitions. [2023-08-27 13:47:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 760 transitions, 13861 flow [2023-08-27 13:48:00,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 760 transitions, 13671 flow, removed 86 selfloop flow, removed 7 redundant places. [2023-08-27 13:48:00,323 INFO L231 Difference]: Finished difference. Result has 324 places, 499 transitions, 8363 flow [2023-08-27 13:48:00,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=8061, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8363, PETRI_PLACES=324, PETRI_TRANSITIONS=499} [2023-08-27 13:48:00,324 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 285 predicate places. [2023-08-27 13:48:00,324 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 499 transitions, 8363 flow [2023-08-27 13:48:00,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 82.15555555555555) internal successors, (3697), 45 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:00,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:00,324 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2023-08-27 13:48:00,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-27 13:48:00,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-27 13:48:00,529 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:00,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1763861184, now seen corresponding path program 9 times [2023-08-27 13:48:00,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:00,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558052605] [2023-08-27 13:48:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:00,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:00,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558052605] [2023-08-27 13:48:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558052605] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:00,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599163556] [2023-08-27 13:48:00,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:48:00,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:00,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:00,967 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:00,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-27 13:48:01,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 13:48:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:01,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 13:48:01,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:01,531 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 13:48:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:01,580 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 13:48:01,912 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:01,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:02,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:02,276 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 28 treesize of output 29 [2023-08-27 13:48:02,282 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:02,282 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 47 treesize of output 39 [2023-08-27 13:48:02,285 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 15 treesize of output 9 [2023-08-27 13:48:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:02,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599163556] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:02,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-08-27 13:48:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370584313] [2023-08-27 13:48:02,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-08-27 13:48:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-08-27 13:48:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2188, Unknown=0, NotChecked=0, Total=2450 [2023-08-27 13:48:02,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 270 [2023-08-27 13:48:02,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 499 transitions, 8363 flow. Second operand has 50 states, 50 states have (on average 76.08) internal successors, (3804), 50 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:02,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:02,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 270 [2023-08-27 13:48:02,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:03,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:48:09,896 INFO L124 PetriNetUnfolderBase]: 4906/7663 cut-off events. [2023-08-27 13:48:09,896 INFO L125 PetriNetUnfolderBase]: For 126758/126975 co-relation queries the response was YES. [2023-08-27 13:48:10,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64973 conditions, 7663 events. 4906/7663 cut-off events. For 126758/126975 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 42283 event pairs, 1336 based on Foata normal form. 236/7843 useless extension candidates. Maximal degree in co-relation 64868. Up to 3940 conditions per place. [2023-08-27 13:48:10,109 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 822 selfloop transitions, 277 changer transitions 0/1120 dead transitions. [2023-08-27 13:48:10,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1120 transitions, 21182 flow [2023-08-27 13:48:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-27 13:48:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-27 13:48:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4846 transitions. [2023-08-27 13:48:10,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2942319368548877 [2023-08-27 13:48:10,112 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4846 transitions. [2023-08-27 13:48:10,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4846 transitions. [2023-08-27 13:48:10,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:10,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4846 transitions. [2023-08-27 13:48:10,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 79.44262295081967) internal successors, (4846), 61 states have internal predecessors, (4846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:10,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 270.0) internal successors, (16740), 62 states have internal predecessors, (16740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:10,124 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 270.0) internal successors, (16740), 62 states have internal predecessors, (16740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:10,124 INFO L175 Difference]: Start difference. First operand has 324 places, 499 transitions, 8363 flow. Second operand 61 states and 4846 transitions. [2023-08-27 13:48:10,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1120 transitions, 21182 flow [2023-08-27 13:48:10,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1120 transitions, 20076 flow, removed 320 selfloop flow, removed 14 redundant places. [2023-08-27 13:48:10,729 INFO L231 Difference]: Finished difference. Result has 389 places, 683 transitions, 12233 flow [2023-08-27 13:48:10,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=12233, PETRI_PLACES=389, PETRI_TRANSITIONS=683} [2023-08-27 13:48:10,730 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 350 predicate places. [2023-08-27 13:48:10,730 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 683 transitions, 12233 flow [2023-08-27 13:48:10,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 76.08) internal successors, (3804), 50 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:10,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:10,731 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:10,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-27 13:48:10,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:10,937 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:10,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:10,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1202492974, now seen corresponding path program 8 times [2023-08-27 13:48:10,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:10,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827357532] [2023-08-27 13:48:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:10,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:10,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:11,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:11,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827357532] [2023-08-27 13:48:11,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827357532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:11,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425457221] [2023-08-27 13:48:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:48:11,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:11,310 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:11,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-27 13:48:11,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:48:11,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:11,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 13:48:11,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:11,853 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 13:48:11,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:11,898 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 13:48:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:11,949 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 13:48:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:12,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:12,565 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:12,565 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 13:48:12,574 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:12,574 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 13:48:12,579 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 13:48:12,582 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 13:48:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:13,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425457221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:13,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:13,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-27 13:48:13,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002772777] [2023-08-27 13:48:13,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:13,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-27 13:48:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-27 13:48:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1938, Unknown=5, NotChecked=0, Total=2162 [2023-08-27 13:48:13,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:48:13,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 683 transitions, 12233 flow. Second operand has 47 states, 47 states have (on average 73.14893617021276) internal successors, (3438), 47 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:13,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:13,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:48:13,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:14,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:48:21,185 INFO L124 PetriNetUnfolderBase]: 5323/8205 cut-off events. [2023-08-27 13:48:21,185 INFO L125 PetriNetUnfolderBase]: For 139869/139920 co-relation queries the response was YES. [2023-08-27 13:48:21,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69386 conditions, 8205 events. 5323/8205 cut-off events. For 139869/139920 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 44945 event pairs, 491 based on Foata normal form. 228/8430 useless extension candidates. Maximal degree in co-relation 69268. Up to 1460 conditions per place. [2023-08-27 13:48:21,388 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1382 selfloop transitions, 250 changer transitions 0/1664 dead transitions. [2023-08-27 13:48:21,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1664 transitions, 31214 flow [2023-08-27 13:48:21,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 13:48:21,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 13:48:21,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3231 transitions. [2023-08-27 13:48:21,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.291869918699187 [2023-08-27 13:48:21,391 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3231 transitions. [2023-08-27 13:48:21,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3231 transitions. [2023-08-27 13:48:21,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:21,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3231 transitions. [2023-08-27 13:48:21,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 78.8048780487805) internal successors, (3231), 41 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:21,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 270.0) internal successors, (11340), 42 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:21,398 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 270.0) internal successors, (11340), 42 states have internal predecessors, (11340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:21,398 INFO L175 Difference]: Start difference. First operand has 389 places, 683 transitions, 12233 flow. Second operand 41 states and 3231 transitions. [2023-08-27 13:48:21,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1664 transitions, 31214 flow [2023-08-27 13:48:22,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1664 transitions, 28517 flow, removed 1185 selfloop flow, removed 19 redundant places. [2023-08-27 13:48:22,140 INFO L231 Difference]: Finished difference. Result has 412 places, 711 transitions, 12021 flow [2023-08-27 13:48:22,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=10277, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=12021, PETRI_PLACES=412, PETRI_TRANSITIONS=711} [2023-08-27 13:48:22,140 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 373 predicate places. [2023-08-27 13:48:22,140 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 711 transitions, 12021 flow [2023-08-27 13:48:22,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 73.14893617021276) internal successors, (3438), 47 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:22,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:22,141 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 1, 1, 1, 1, 1] [2023-08-27 13:48:22,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-27 13:48:22,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-27 13:48:22,347 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:22,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:22,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1154874437, now seen corresponding path program 8 times [2023-08-27 13:48:22,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:22,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322559057] [2023-08-27 13:48:22,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:22,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:22,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322559057] [2023-08-27 13:48:22,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322559057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:22,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563678455] [2023-08-27 13:48:22,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:48:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:22,573 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:22,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-27 13:48:22,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:48:22,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:22,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 13:48:22,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:23,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:23,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:23,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563678455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:23,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:23,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 42 [2023-08-27 13:48:23,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687566936] [2023-08-27 13:48:23,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 13:48:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:23,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 13:48:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2023-08-27 13:48:23,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:48:23,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 711 transitions, 12021 flow. Second operand has 44 states, 44 states have (on average 90.0909090909091) internal successors, (3964), 44 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:23,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:23,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:48:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:25,565 INFO L124 PetriNetUnfolderBase]: 5117/7923 cut-off events. [2023-08-27 13:48:25,565 INFO L125 PetriNetUnfolderBase]: For 134979/135190 co-relation queries the response was YES. [2023-08-27 13:48:25,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66208 conditions, 7923 events. 5117/7923 cut-off events. For 134979/135190 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 44441 event pairs, 730 based on Foata normal form. 318/8181 useless extension candidates. Maximal degree in co-relation 66094. Up to 2419 conditions per place. [2023-08-27 13:48:25,646 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 780 selfloop transitions, 340 changer transitions 0/1150 dead transitions. [2023-08-27 13:48:25,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1150 transitions, 20727 flow [2023-08-27 13:48:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 13:48:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 13:48:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1804 transitions. [2023-08-27 13:48:25,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3516569200779727 [2023-08-27 13:48:25,648 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1804 transitions. [2023-08-27 13:48:25,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1804 transitions. [2023-08-27 13:48:25,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:25,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1804 transitions. [2023-08-27 13:48:25,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 94.94736842105263) internal successors, (1804), 19 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:25,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 270.0) internal successors, (5400), 20 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:25,652 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 270.0) internal successors, (5400), 20 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:25,652 INFO L175 Difference]: Start difference. First operand has 412 places, 711 transitions, 12021 flow. Second operand 19 states and 1804 transitions. [2023-08-27 13:48:25,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1150 transitions, 20727 flow [2023-08-27 13:48:26,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 1150 transitions, 19469 flow, removed 112 selfloop flow, removed 23 redundant places. [2023-08-27 13:48:26,228 INFO L231 Difference]: Finished difference. Result has 416 places, 744 transitions, 13383 flow [2023-08-27 13:48:26,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=11424, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13383, PETRI_PLACES=416, PETRI_TRANSITIONS=744} [2023-08-27 13:48:26,229 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 377 predicate places. [2023-08-27 13:48:26,229 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 744 transitions, 13383 flow [2023-08-27 13:48:26,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 90.0909090909091) internal successors, (3964), 44 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:26,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:26,230 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1] [2023-08-27 13:48:26,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-27 13:48:26,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:26,436 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:26,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:26,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1763861185, now seen corresponding path program 9 times [2023-08-27 13:48:26,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:26,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122533671] [2023-08-27 13:48:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:26,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:26,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:26,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122533671] [2023-08-27 13:48:26,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122533671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:26,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370638238] [2023-08-27 13:48:26,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:48:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:26,871 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:26,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-27 13:48:27,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 13:48:27,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:27,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 13:48:27,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:27,417 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 13:48:27,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:27,448 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 13:48:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:27,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:27,805 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2631 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_2631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-27 13:48:27,810 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:27,810 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 24 treesize of output 25 [2023-08-27 13:48:27,815 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:27,815 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 37 treesize of output 31 [2023-08-27 13:48:27,826 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 7 treesize of output 3 [2023-08-27 13:48:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-08-27 13:48:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370638238] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:28,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:28,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-08-27 13:48:28,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960092918] [2023-08-27 13:48:28,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:28,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-27 13:48:28,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:28,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-27 13:48:28,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2016, Unknown=1, NotChecked=90, Total=2256 [2023-08-27 13:48:28,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:48:28,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 744 transitions, 13383 flow. Second operand has 48 states, 48 states have (on average 85.08333333333333) internal successors, (4084), 48 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:28,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:28,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:48:28,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:30,746 INFO L124 PetriNetUnfolderBase]: 5121/7920 cut-off events. [2023-08-27 13:48:30,746 INFO L125 PetriNetUnfolderBase]: For 145591/145798 co-relation queries the response was YES. [2023-08-27 13:48:30,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69137 conditions, 7920 events. 5121/7920 cut-off events. For 145591/145798 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 43700 event pairs, 1935 based on Foata normal form. 158/7987 useless extension candidates. Maximal degree in co-relation 69015. Up to 7456 conditions per place. [2023-08-27 13:48:30,842 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 650 selfloop transitions, 91 changer transitions 0/771 dead transitions. [2023-08-27 13:48:30,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 771 transitions, 15276 flow [2023-08-27 13:48:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 13:48:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 13:48:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1747 transitions. [2023-08-27 13:48:30,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32351851851851854 [2023-08-27 13:48:30,844 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1747 transitions. [2023-08-27 13:48:30,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1747 transitions. [2023-08-27 13:48:30,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:30,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1747 transitions. [2023-08-27 13:48:30,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 87.35) internal successors, (1747), 20 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:30,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 270.0) internal successors, (5670), 21 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:30,847 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 270.0) internal successors, (5670), 21 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:30,847 INFO L175 Difference]: Start difference. First operand has 416 places, 744 transitions, 13383 flow. Second operand 20 states and 1747 transitions. [2023-08-27 13:48:30,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 771 transitions, 15276 flow [2023-08-27 13:48:31,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 771 transitions, 15092 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-08-27 13:48:31,802 INFO L231 Difference]: Finished difference. Result has 426 places, 742 transitions, 13334 flow [2023-08-27 13:48:31,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=13152, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13334, PETRI_PLACES=426, PETRI_TRANSITIONS=742} [2023-08-27 13:48:31,802 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 387 predicate places. [2023-08-27 13:48:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 742 transitions, 13334 flow [2023-08-27 13:48:31,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 85.08333333333333) internal successors, (4084), 48 states have internal predecessors, (4084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:31,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:31,803 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:31,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-27 13:48:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:32,009 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:32,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1870855845, now seen corresponding path program 7 times [2023-08-27 13:48:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168755668] [2023-08-27 13:48:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:32,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:48:32,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168755668] [2023-08-27 13:48:32,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168755668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:32,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041035648] [2023-08-27 13:48:32,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:48:32,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:32,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:32,090 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:32,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-27 13:48:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:32,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 13:48:32,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:32,495 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 13:48:32,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:32,544 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 13:48:32,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041035648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:32,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:32,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 13:48:32,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443499083] [2023-08-27 13:48:32,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:32,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 13:48:32,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 13:48:32,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 13:48:32,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:48:32,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 742 transitions, 13334 flow. Second operand has 14 states, 14 states have (on average 91.07142857142857) internal successors, (1275), 14 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:32,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:32,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:48:32,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:34,566 INFO L124 PetriNetUnfolderBase]: 4733/7281 cut-off events. [2023-08-27 13:48:34,567 INFO L125 PetriNetUnfolderBase]: For 132544/132559 co-relation queries the response was YES. [2023-08-27 13:48:34,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63532 conditions, 7281 events. 4733/7281 cut-off events. For 132544/132559 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 38416 event pairs, 1154 based on Foata normal form. 478/7756 useless extension candidates. Maximal degree in co-relation 63410. Up to 4890 conditions per place. [2023-08-27 13:48:34,661 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 815 selfloop transitions, 178 changer transitions 0/1029 dead transitions. [2023-08-27 13:48:34,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1029 transitions, 20535 flow [2023-08-27 13:48:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:48:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:48:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2023-08-27 13:48:34,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348559670781893 [2023-08-27 13:48:34,662 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2023-08-27 13:48:34,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2023-08-27 13:48:34,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:34,662 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2023-08-27 13:48:34,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:34,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:34,664 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:34,664 INFO L175 Difference]: Start difference. First operand has 426 places, 742 transitions, 13334 flow. Second operand 9 states and 847 transitions. [2023-08-27 13:48:34,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1029 transitions, 20535 flow [2023-08-27 13:48:35,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1029 transitions, 20384 flow, removed 8 selfloop flow, removed 16 redundant places. [2023-08-27 13:48:35,538 INFO L231 Difference]: Finished difference. Result has 418 places, 733 transitions, 13426 flow [2023-08-27 13:48:35,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=13070, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13426, PETRI_PLACES=418, PETRI_TRANSITIONS=733} [2023-08-27 13:48:35,539 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 379 predicate places. [2023-08-27 13:48:35,539 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 733 transitions, 13426 flow [2023-08-27 13:48:35,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 91.07142857142857) internal successors, (1275), 14 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:35,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:35,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:35,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-08-27 13:48:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:35,745 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:35,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1778717658, now seen corresponding path program 8 times [2023-08-27 13:48:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:35,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278491632] [2023-08-27 13:48:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:35,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:48:35,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278491632] [2023-08-27 13:48:35,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278491632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:35,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286703490] [2023-08-27 13:48:35,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:48:35,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:35,809 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:35,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-27 13:48:36,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:48:36,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:36,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 13:48:36,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:36,213 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 13:48:36,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:36,252 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 13:48:36,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286703490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:36,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:36,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 13:48:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81873089] [2023-08-27 13:48:36,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 13:48:36,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 13:48:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-27 13:48:36,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:48:36,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 733 transitions, 13426 flow. Second operand has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:36,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:48:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:37,911 INFO L124 PetriNetUnfolderBase]: 4029/6213 cut-off events. [2023-08-27 13:48:37,911 INFO L125 PetriNetUnfolderBase]: For 138239/138439 co-relation queries the response was YES. [2023-08-27 13:48:37,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55448 conditions, 6213 events. 4029/6213 cut-off events. For 138239/138439 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 32092 event pairs, 1189 based on Foata normal form. 475/6617 useless extension candidates. Maximal degree in co-relation 55326. Up to 4441 conditions per place. [2023-08-27 13:48:37,984 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 573 selfloop transitions, 235 changer transitions 0/838 dead transitions. [2023-08-27 13:48:37,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 838 transitions, 16254 flow [2023-08-27 13:48:37,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 13:48:37,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 13:48:37,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2023-08-27 13:48:37,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348559670781893 [2023-08-27 13:48:37,986 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2023-08-27 13:48:37,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2023-08-27 13:48:37,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:37,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2023-08-27 13:48:37,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:37,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:37,988 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 270.0) internal successors, (2700), 10 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:37,988 INFO L175 Difference]: Start difference. First operand has 418 places, 733 transitions, 13426 flow. Second operand 9 states and 847 transitions. [2023-08-27 13:48:37,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 838 transitions, 16254 flow [2023-08-27 13:48:38,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 838 transitions, 15788 flow, removed 61 selfloop flow, removed 7 redundant places. [2023-08-27 13:48:38,524 INFO L231 Difference]: Finished difference. Result has 419 places, 710 transitions, 12935 flow [2023-08-27 13:48:38,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=12465, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12935, PETRI_PLACES=419, PETRI_TRANSITIONS=710} [2023-08-27 13:48:38,525 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 380 predicate places. [2023-08-27 13:48:38,525 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 710 transitions, 12935 flow [2023-08-27 13:48:38,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 91.0) internal successors, (1274), 14 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:38,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:38,526 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:38,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-08-27 13:48:38,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-27 13:48:38,730 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:38,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:38,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1377419192, now seen corresponding path program 8 times [2023-08-27 13:48:38,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:38,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315109017] [2023-08-27 13:48:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:38,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:38,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:38,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315109017] [2023-08-27 13:48:38,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315109017] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:38,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551642521] [2023-08-27 13:48:38,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:48:38,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:38,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:38,910 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:38,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-27 13:48:39,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:48:39,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:39,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 13:48:39,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:39,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:39,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551642521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:39,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:39,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-08-27 13:48:39,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630974069] [2023-08-27 13:48:39,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:39,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 13:48:39,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:39,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 13:48:39,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2023-08-27 13:48:39,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:48:39,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 710 transitions, 12935 flow. Second operand has 39 states, 39 states have (on average 90.15384615384616) internal successors, (3516), 39 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:39,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:39,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:48:39,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:41,464 INFO L124 PetriNetUnfolderBase]: 4082/6305 cut-off events. [2023-08-27 13:48:41,464 INFO L125 PetriNetUnfolderBase]: For 125253/125262 co-relation queries the response was YES. [2023-08-27 13:48:41,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55457 conditions, 6305 events. 4082/6305 cut-off events. For 125253/125262 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 32062 event pairs, 949 based on Foata normal form. 67/6370 useless extension candidates. Maximal degree in co-relation 55335. Up to 2836 conditions per place. [2023-08-27 13:48:41,551 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 952 selfloop transitions, 148 changer transitions 0/1136 dead transitions. [2023-08-27 13:48:41,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1136 transitions, 22687 flow [2023-08-27 13:48:41,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 13:48:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 13:48:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1604 transitions. [2023-08-27 13:48:41,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494553376906318 [2023-08-27 13:48:41,553 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1604 transitions. [2023-08-27 13:48:41,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1604 transitions. [2023-08-27 13:48:41,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:48:41,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1604 transitions. [2023-08-27 13:48:41,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.3529411764706) internal successors, (1604), 17 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:41,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:41,557 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 270.0) internal successors, (4860), 18 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:41,557 INFO L175 Difference]: Start difference. First operand has 419 places, 710 transitions, 12935 flow. Second operand 17 states and 1604 transitions. [2023-08-27 13:48:41,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1136 transitions, 22687 flow [2023-08-27 13:48:42,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1136 transitions, 22115 flow, removed 41 selfloop flow, removed 7 redundant places. [2023-08-27 13:48:42,212 INFO L231 Difference]: Finished difference. Result has 429 places, 709 transitions, 12759 flow [2023-08-27 13:48:42,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=12459, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=12759, PETRI_PLACES=429, PETRI_TRANSITIONS=709} [2023-08-27 13:48:42,213 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 390 predicate places. [2023-08-27 13:48:42,213 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 709 transitions, 12759 flow [2023-08-27 13:48:42,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 90.15384615384616) internal successors, (3516), 39 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:42,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:48:42,213 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2023-08-27 13:48:42,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-08-27 13:48:42,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-27 13:48:42,419 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:48:42,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:48:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash -966113226, now seen corresponding path program 6 times [2023-08-27 13:48:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:48:42,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618747951] [2023-08-27 13:48:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:48:42,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:48:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:48:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:48:42,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618747951] [2023-08-27 13:48:42,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618747951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:48:42,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322483471] [2023-08-27 13:48:42,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:48:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:48:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:48:42,953 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:48:42,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-27 13:48:43,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-27 13:48:43,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:48:43,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 13:48:43,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:48:43,613 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 13:48:43,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:43,664 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 13:48:43,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:48:43,753 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 13:48:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:44,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:48:44,512 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:44,512 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-27 13:48:44,520 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:48:44,520 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 13:48:44,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-27 13:48:44,530 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 54 treesize of output 42 [2023-08-27 13:48:45,112 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:48:45,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322483471] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:48:45,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:48:45,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-27 13:48:45,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627026259] [2023-08-27 13:48:45,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:48:45,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-27 13:48:45,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:48:45,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-27 13:48:45,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=2488, Unknown=2, NotChecked=0, Total=2756 [2023-08-27 13:48:45,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:48:45,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 709 transitions, 12759 flow. Second operand has 53 states, 53 states have (on average 73.0754716981132) internal successors, (3873), 53 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:48:45,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:48:45,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:48:45,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:48:46,191 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:49:09,254 INFO L124 PetriNetUnfolderBase]: 4603/7071 cut-off events. [2023-08-27 13:49:09,254 INFO L125 PetriNetUnfolderBase]: For 161168/161377 co-relation queries the response was YES. [2023-08-27 13:49:09,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64665 conditions, 7071 events. 4603/7071 cut-off events. For 161168/161377 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 37360 event pairs, 359 based on Foata normal form. 276/7293 useless extension candidates. Maximal degree in co-relation 64542. Up to 1199 conditions per place. [2023-08-27 13:49:09,361 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 899 selfloop transitions, 460 changer transitions 0/1389 dead transitions. [2023-08-27 13:49:09,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 1389 transitions, 25377 flow [2023-08-27 13:49:09,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-27 13:49:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-27 13:49:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3630 transitions. [2023-08-27 13:49:09,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922705314009662 [2023-08-27 13:49:09,365 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3630 transitions. [2023-08-27 13:49:09,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3630 transitions. [2023-08-27 13:49:09,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:49:09,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3630 transitions. [2023-08-27 13:49:09,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 78.91304347826087) internal successors, (3630), 46 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:09,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 270.0) internal successors, (12690), 47 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:09,374 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 270.0) internal successors, (12690), 47 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:09,374 INFO L175 Difference]: Start difference. First operand has 429 places, 709 transitions, 12759 flow. Second operand 46 states and 3630 transitions. [2023-08-27 13:49:09,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 1389 transitions, 25377 flow [2023-08-27 13:49:10,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 1389 transitions, 24697 flow, removed 9 selfloop flow, removed 17 redundant places. [2023-08-27 13:49:10,176 INFO L231 Difference]: Finished difference. Result has 462 places, 769 transitions, 14593 flow [2023-08-27 13:49:10,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=12378, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=14593, PETRI_PLACES=462, PETRI_TRANSITIONS=769} [2023-08-27 13:49:10,193 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 423 predicate places. [2023-08-27 13:49:10,193 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 769 transitions, 14593 flow [2023-08-27 13:49:10,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 73.0754716981132) internal successors, (3873), 53 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:10,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:49:10,193 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1] [2023-08-27 13:49:10,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-27 13:49:10,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-27 13:49:10,399 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:49:10,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:49:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1130971579, now seen corresponding path program 6 times [2023-08-27 13:49:10,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:49:10,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303058920] [2023-08-27 13:49:10,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:10,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:49:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:49:10,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:49:10,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303058920] [2023-08-27 13:49:10,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303058920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:49:10,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433326125] [2023-08-27 13:49:10,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:49:10,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:49:10,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:49:10,989 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:49:10,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-27 13:49:11,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-27 13:49:11,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:49:11,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 13:49:11,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:49:11,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:11,388 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 8 [2023-08-27 13:49:11,606 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 13:49:11,661 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 13:49:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:11,711 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 13:49:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:49:12,011 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:49:12,452 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:12,453 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 13:49:12,468 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:12,469 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 13:49:12,475 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 13:49:12,480 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 36 treesize of output 24 [2023-08-27 13:49:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:49:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433326125] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:49:13,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:49:13,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-27 13:49:13,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953553657] [2023-08-27 13:49:13,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:49:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-27 13:49:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:49:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-27 13:49:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2482, Unknown=2, NotChecked=0, Total=2756 [2023-08-27 13:49:13,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:49:13,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 769 transitions, 14593 flow. Second operand has 53 states, 53 states have (on average 73.0754716981132) internal successors, (3873), 53 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:13,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:49:13,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:49:13,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:49:14,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:49:46,819 INFO L124 PetriNetUnfolderBase]: 4379/6712 cut-off events. [2023-08-27 13:49:46,820 INFO L125 PetriNetUnfolderBase]: For 168194/168403 co-relation queries the response was YES. [2023-08-27 13:49:46,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61574 conditions, 6712 events. 4379/6712 cut-off events. For 168194/168403 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 34982 event pairs, 353 based on Foata normal form. 275/6943 useless extension candidates. Maximal degree in co-relation 61447. Up to 1169 conditions per place. [2023-08-27 13:49:46,909 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 865 selfloop transitions, 455 changer transitions 0/1349 dead transitions. [2023-08-27 13:49:46,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1349 transitions, 24707 flow [2023-08-27 13:49:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-27 13:49:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-27 13:49:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3626 transitions. [2023-08-27 13:49:46,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2919484702093398 [2023-08-27 13:49:46,912 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3626 transitions. [2023-08-27 13:49:46,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3626 transitions. [2023-08-27 13:49:46,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:49:46,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3626 transitions. [2023-08-27 13:49:46,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 78.82608695652173) internal successors, (3626), 46 states have internal predecessors, (3626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:46,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 270.0) internal successors, (12690), 47 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:46,919 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 270.0) internal successors, (12690), 47 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:46,919 INFO L175 Difference]: Start difference. First operand has 462 places, 769 transitions, 14593 flow. Second operand 46 states and 3626 transitions. [2023-08-27 13:49:46,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1349 transitions, 24707 flow [2023-08-27 13:49:47,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 1349 transitions, 21796 flow, removed 328 selfloop flow, removed 46 redundant places. [2023-08-27 13:49:47,601 INFO L231 Difference]: Finished difference. Result has 461 places, 750 transitions, 12245 flow [2023-08-27 13:49:47,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=11335, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12245, PETRI_PLACES=461, PETRI_TRANSITIONS=750} [2023-08-27 13:49:47,603 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 422 predicate places. [2023-08-27 13:49:47,603 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 750 transitions, 12245 flow [2023-08-27 13:49:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 73.0754716981132) internal successors, (3873), 53 states have internal predecessors, (3873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:49:47,603 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:49:47,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-27 13:49:47,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-27 13:49:47,810 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:49:47,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:49:47,810 INFO L85 PathProgramCache]: Analyzing trace with hash 844331922, now seen corresponding path program 9 times [2023-08-27 13:49:47,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:49:47,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676654715] [2023-08-27 13:49:47,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:49:47,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:49:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:49:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:49:48,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:49:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676654715] [2023-08-27 13:49:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676654715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:49:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454792495] [2023-08-27 13:49:48,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:49:48,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:49:48,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:49:48,338 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:49:48,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-27 13:49:48,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 13:49:48,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:49:48,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 13:49:48,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:49:49,017 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 13:49:49,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:49,063 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 13:49:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:49:49,108 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 20 treesize of output 22 [2023-08-27 13:49:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:49:49,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:49:49,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:49,950 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 13:49:49,957 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:49:49,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 81 [2023-08-27 13:49:49,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-27 13:49:49,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-27 13:49:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:49:50,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454792495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:49:50,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:49:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2023-08-27 13:49:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182877284] [2023-08-27 13:49:50,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:49:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-08-27 13:49:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:49:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-08-27 13:49:50,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2481, Unknown=3, NotChecked=0, Total=2756 [2023-08-27 13:49:50,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 270 [2023-08-27 13:49:50,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 750 transitions, 12245 flow. Second operand has 53 states, 53 states have (on average 73.13207547169812) internal successors, (3876), 53 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:49:50,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:49:50,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 270 [2023-08-27 13:49:50,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:49:52,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:50:20,403 INFO L124 PetriNetUnfolderBase]: 4768/7225 cut-off events. [2023-08-27 13:50:20,403 INFO L125 PetriNetUnfolderBase]: For 110857/110882 co-relation queries the response was YES. [2023-08-27 13:50:20,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59436 conditions, 7225 events. 4768/7225 cut-off events. For 110857/110882 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 36751 event pairs, 358 based on Foata normal form. 159/7378 useless extension candidates. Maximal degree in co-relation 59327. Up to 1238 conditions per place. [2023-08-27 13:50:20,481 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1417 selfloop transitions, 268 changer transitions 0/1725 dead transitions. [2023-08-27 13:50:20,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1725 transitions, 29839 flow [2023-08-27 13:50:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-27 13:50:20,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-27 13:50:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3604 transitions. [2023-08-27 13:50:20,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29017713365539455 [2023-08-27 13:50:20,484 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3604 transitions. [2023-08-27 13:50:20,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3604 transitions. [2023-08-27 13:50:20,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:20,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3604 transitions. [2023-08-27 13:50:20,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 78.34782608695652) internal successors, (3604), 46 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:20,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 270.0) internal successors, (12690), 47 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:20,491 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 270.0) internal successors, (12690), 47 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:20,491 INFO L175 Difference]: Start difference. First operand has 461 places, 750 transitions, 12245 flow. Second operand 46 states and 3604 transitions. [2023-08-27 13:50:20,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1725 transitions, 29839 flow [2023-08-27 13:50:20,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 1725 transitions, 27541 flow, removed 25 selfloop flow, removed 43 redundant places. [2023-08-27 13:50:20,893 INFO L231 Difference]: Finished difference. Result has 468 places, 791 transitions, 12758 flow [2023-08-27 13:50:20,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=11375, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=12758, PETRI_PLACES=468, PETRI_TRANSITIONS=791} [2023-08-27 13:50:20,894 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 429 predicate places. [2023-08-27 13:50:20,894 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 791 transitions, 12758 flow [2023-08-27 13:50:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 73.13207547169812) internal successors, (3876), 53 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:20,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:20,894 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:20,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-27 13:50:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:21,101 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:50:21,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:21,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1255710220, now seen corresponding path program 9 times [2023-08-27 13:50:21,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:21,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792154752] [2023-08-27 13:50:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:21,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:21,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792154752] [2023-08-27 13:50:21,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792154752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:21,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446727860] [2023-08-27 13:50:21,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:50:21,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:21,740 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:50:21,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-27 13:50:22,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 13:50:22,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:22,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 13:50:22,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:22,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:50:22,296 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 38 treesize of output 34 [2023-08-27 13:50:22,410 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:22,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2023-08-27 13:50:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:50:22,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:24,807 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:24,807 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 249 treesize of output 220 [2023-08-27 13:50:24,818 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:24,818 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 38 treesize of output 26 [2023-08-27 13:50:25,047 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:50:25,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446727860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:50:25,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:50:25,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-08-27 13:50:25,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030225594] [2023-08-27 13:50:25,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:50:25,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 13:50:25,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:25,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 13:50:25,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=717, Unknown=1, NotChecked=0, Total=812 [2023-08-27 13:50:25,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:50:25,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 791 transitions, 12758 flow. Second operand has 29 states, 29 states have (on average 67.65517241379311) internal successors, (1962), 29 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:25,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:25,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:50:25,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:27,513 INFO L124 PetriNetUnfolderBase]: 5286/8081 cut-off events. [2023-08-27 13:50:27,513 INFO L125 PetriNetUnfolderBase]: For 113357/113357 co-relation queries the response was YES. [2023-08-27 13:50:27,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66461 conditions, 8081 events. 5286/8081 cut-off events. For 113357/113357 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 42631 event pairs, 633 based on Foata normal form. 8/8089 useless extension candidates. Maximal degree in co-relation 66349. Up to 6597 conditions per place. [2023-08-27 13:50:27,615 INFO L140 encePairwiseOnDemand]: 259/270 looper letters, 659 selfloop transitions, 323 changer transitions 17/999 dead transitions. [2023-08-27 13:50:27,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 999 transitions, 17309 flow [2023-08-27 13:50:27,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 13:50:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 13:50:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1363 transitions. [2023-08-27 13:50:27,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.265692007797271 [2023-08-27 13:50:27,616 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1363 transitions. [2023-08-27 13:50:27,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1363 transitions. [2023-08-27 13:50:27,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:27,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1363 transitions. [2023-08-27 13:50:27,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 71.73684210526316) internal successors, (1363), 19 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:27,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 270.0) internal successors, (5400), 20 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:27,620 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 270.0) internal successors, (5400), 20 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:27,620 INFO L175 Difference]: Start difference. First operand has 468 places, 791 transitions, 12758 flow. Second operand 19 states and 1363 transitions. [2023-08-27 13:50:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 999 transitions, 17309 flow [2023-08-27 13:50:28,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 999 transitions, 16511 flow, removed 72 selfloop flow, removed 36 redundant places. [2023-08-27 13:50:28,216 INFO L231 Difference]: Finished difference. Result has 453 places, 872 transitions, 13879 flow [2023-08-27 13:50:28,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=12065, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13879, PETRI_PLACES=453, PETRI_TRANSITIONS=872} [2023-08-27 13:50:28,216 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 414 predicate places. [2023-08-27 13:50:28,216 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 872 transitions, 13879 flow [2023-08-27 13:50:28,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 67.65517241379311) internal successors, (1962), 29 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:28,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:28,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:28,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-27 13:50:28,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:28,423 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:50:28,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash 569710956, now seen corresponding path program 10 times [2023-08-27 13:50:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:28,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88350060] [2023-08-27 13:50:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:28,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:29,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88350060] [2023-08-27 13:50:29,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88350060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:29,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507660434] [2023-08-27 13:50:29,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:50:29,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:29,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:29,219 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:50:29,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-27 13:50:29,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:50:29,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:29,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-27 13:50:29,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:29,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:50:29,794 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 23 treesize of output 23 [2023-08-27 13:50:30,044 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:30,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 93 treesize of output 77 [2023-08-27 13:50:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:30,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:30,682 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:30,682 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 276 treesize of output 262 [2023-08-27 13:50:30,706 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:30,706 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 65 treesize of output 63 [2023-08-27 13:50:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:31,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507660434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:50:31,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:50:31,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-08-27 13:50:31,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283134737] [2023-08-27 13:50:31,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:50:31,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 13:50:31,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:31,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 13:50:31,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1061, Unknown=2, NotChecked=0, Total=1190 [2023-08-27 13:50:31,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:50:31,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 872 transitions, 13879 flow. Second operand has 35 states, 35 states have (on average 67.6) internal successors, (2366), 35 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:31,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:31,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:50:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:35,011 INFO L124 PetriNetUnfolderBase]: 5288/8098 cut-off events. [2023-08-27 13:50:35,011 INFO L125 PetriNetUnfolderBase]: For 117188/117188 co-relation queries the response was YES. [2023-08-27 13:50:35,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64015 conditions, 8098 events. 5288/8098 cut-off events. For 117188/117188 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 42467 event pairs, 1162 based on Foata normal form. 1/8099 useless extension candidates. Maximal degree in co-relation 63900. Up to 7434 conditions per place. [2023-08-27 13:50:35,113 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 787 selfloop transitions, 161 changer transitions 27/975 dead transitions. [2023-08-27 13:50:35,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 975 transitions, 16991 flow [2023-08-27 13:50:35,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 13:50:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 13:50:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1908 transitions. [2023-08-27 13:50:35,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2617283950617284 [2023-08-27 13:50:35,115 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1908 transitions. [2023-08-27 13:50:35,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1908 transitions. [2023-08-27 13:50:35,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:35,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1908 transitions. [2023-08-27 13:50:35,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 70.66666666666667) internal successors, (1908), 27 states have internal predecessors, (1908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:35,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 270.0) internal successors, (7560), 28 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:35,119 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 270.0) internal successors, (7560), 28 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:35,119 INFO L175 Difference]: Start difference. First operand has 453 places, 872 transitions, 13879 flow. Second operand 27 states and 1908 transitions. [2023-08-27 13:50:35,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 975 transitions, 16991 flow [2023-08-27 13:50:35,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 975 transitions, 16479 flow, removed 125 selfloop flow, removed 10 redundant places. [2023-08-27 13:50:35,758 INFO L231 Difference]: Finished difference. Result has 479 places, 889 transitions, 14209 flow [2023-08-27 13:50:35,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=13384, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=14209, PETRI_PLACES=479, PETRI_TRANSITIONS=889} [2023-08-27 13:50:35,759 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 440 predicate places. [2023-08-27 13:50:35,759 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 889 transitions, 14209 flow [2023-08-27 13:50:35,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 67.6) internal successors, (2366), 35 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:35,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:35,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:35,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-08-27 13:50:35,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-27 13:50:35,965 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:50:35,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1090170892, now seen corresponding path program 11 times [2023-08-27 13:50:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:35,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568747083] [2023-08-27 13:50:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:35,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:36,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:36,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:36,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568747083] [2023-08-27 13:50:36,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568747083] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:36,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256206582] [2023-08-27 13:50:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:50:36,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:36,738 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:50:36,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-27 13:50:37,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 13:50:37,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:37,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 13:50:37,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:50:37,243 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 23 treesize of output 23 [2023-08-27 13:50:37,400 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:37,400 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2023-08-27 13:50:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:50:37,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:39,765 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:39,766 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 268 treesize of output 248 [2023-08-27 13:50:39,781 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:39,781 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 61 treesize of output 53 [2023-08-27 13:50:40,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:50:40,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256206582] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:50:40,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:50:40,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-08-27 13:50:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983413237] [2023-08-27 13:50:40,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:50:40,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 13:50:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:40,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 13:50:40,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=770, Unknown=3, NotChecked=0, Total=870 [2023-08-27 13:50:40,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:50:40,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 889 transitions, 14209 flow. Second operand has 30 states, 30 states have (on average 67.56666666666666) internal successors, (2027), 30 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:40,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:40,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:50:40,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:43,170 INFO L124 PetriNetUnfolderBase]: 5852/8969 cut-off events. [2023-08-27 13:50:43,170 INFO L125 PetriNetUnfolderBase]: For 127562/127562 co-relation queries the response was YES. [2023-08-27 13:50:43,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70361 conditions, 8969 events. 5852/8969 cut-off events. For 127562/127562 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 48059 event pairs, 929 based on Foata normal form. 8/8977 useless extension candidates. Maximal degree in co-relation 70235. Up to 7529 conditions per place. [2023-08-27 13:50:43,288 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 684 selfloop transitions, 444 changer transitions 37/1165 dead transitions. [2023-08-27 13:50:43,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 1165 transitions, 20173 flow [2023-08-27 13:50:43,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 13:50:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 13:50:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1913 transitions. [2023-08-27 13:50:43,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2624142661179698 [2023-08-27 13:50:43,290 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1913 transitions. [2023-08-27 13:50:43,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1913 transitions. [2023-08-27 13:50:43,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:43,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1913 transitions. [2023-08-27 13:50:43,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 70.85185185185185) internal successors, (1913), 27 states have internal predecessors, (1913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:43,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 270.0) internal successors, (7560), 28 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:43,295 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 270.0) internal successors, (7560), 28 states have internal predecessors, (7560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:43,295 INFO L175 Difference]: Start difference. First operand has 479 places, 889 transitions, 14209 flow. Second operand 27 states and 1913 transitions. [2023-08-27 13:50:43,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 1165 transitions, 20173 flow [2023-08-27 13:50:44,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1165 transitions, 19817 flow, removed 96 selfloop flow, removed 13 redundant places. [2023-08-27 13:50:44,068 INFO L231 Difference]: Finished difference. Result has 493 places, 1043 transitions, 17365 flow [2023-08-27 13:50:44,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=13875, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17365, PETRI_PLACES=493, PETRI_TRANSITIONS=1043} [2023-08-27 13:50:44,069 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 454 predicate places. [2023-08-27 13:50:44,069 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1043 transitions, 17365 flow [2023-08-27 13:50:44,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 67.56666666666666) internal successors, (2027), 30 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:44,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:44,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:44,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2023-08-27 13:50:44,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:44,275 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:50:44,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1089576246, now seen corresponding path program 12 times [2023-08-27 13:50:44,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:44,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552838237] [2023-08-27 13:50:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:44,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:44,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:44,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:44,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552838237] [2023-08-27 13:50:44,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552838237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017122483] [2023-08-27 13:50:44,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:50:44,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:44,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:44,853 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:50:44,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-27 13:50:45,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 13:50:45,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:45,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-27 13:50:45,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:45,259 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2023-08-27 13:50:45,372 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 23 treesize of output 23 [2023-08-27 13:50:45,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:45,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2023-08-27 13:50:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:50:45,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:45,902 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ c_~A~0.offset 4)) (.cse5 (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (and (forall ((v_ArrVal_3069 (Array Int Int))) (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3069) c_~A~0.base))) (let ((.cse0 (select .cse3 .cse5)) (.cse1 (select .cse3 .cse4)) (.cse2 (select .cse3 c_~A~0.offset))) (or (<= (+ c_~counter~0 .cse0) (+ .cse1 .cse2)) (< (+ 9223372039002259455 .cse0) 0) (< 9223372039002259455 .cse1) (< 9223372039002259455 .cse2))))) (forall ((v_ArrVal_3069 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3069) c_~A~0.base))) (let ((.cse8 (select .cse9 .cse5)) (.cse6 (select .cse9 .cse4)) (.cse7 (select .cse9 c_~A~0.offset))) (or (< (+ .cse6 .cse7) (+ c_~counter~0 .cse8 1)) (< (+ 9223372039002259455 .cse8) 0) (< 9223372039002259455 .cse6) (< 9223372039002259455 .cse7))))))) is different from false [2023-08-27 13:50:45,979 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:45,980 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 409 treesize of output 351 [2023-08-27 13:50:45,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:45,998 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 201 treesize of output 194 [2023-08-27 13:50:46,015 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:46,015 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 175 treesize of output 168 [2023-08-27 13:50:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:50:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017122483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:50:46,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:50:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-08-27 13:50:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107385714] [2023-08-27 13:50:46,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:50:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 13:50:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 13:50:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=670, Unknown=1, NotChecked=52, Total=812 [2023-08-27 13:50:46,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 270 [2023-08-27 13:50:46,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1043 transitions, 17365 flow. Second operand has 29 states, 29 states have (on average 70.65517241379311) internal successors, (2049), 29 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:46,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:46,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 270 [2023-08-27 13:50:46,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:50,326 INFO L124 PetriNetUnfolderBase]: 6408/9847 cut-off events. [2023-08-27 13:50:50,326 INFO L125 PetriNetUnfolderBase]: For 146800/146800 co-relation queries the response was YES. [2023-08-27 13:50:50,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80485 conditions, 9847 events. 6408/9847 cut-off events. For 146800/146800 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 53947 event pairs, 977 based on Foata normal form. 8/9855 useless extension candidates. Maximal degree in co-relation 80358. Up to 8263 conditions per place. [2023-08-27 13:50:50,458 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 743 selfloop transitions, 542 changer transitions 19/1304 dead transitions. [2023-08-27 13:50:50,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1304 transitions, 23732 flow [2023-08-27 13:50:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:50:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:50:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1852 transitions. [2023-08-27 13:50:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2743703703703704 [2023-08-27 13:50:50,460 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1852 transitions. [2023-08-27 13:50:50,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1852 transitions. [2023-08-27 13:50:50,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:50,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1852 transitions. [2023-08-27 13:50:50,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 74.08) internal successors, (1852), 25 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:50,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:50,464 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:50,464 INFO L175 Difference]: Start difference. First operand has 493 places, 1043 transitions, 17365 flow. Second operand 25 states and 1852 transitions. [2023-08-27 13:50:50,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1304 transitions, 23732 flow [2023-08-27 13:50:51,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1304 transitions, 22529 flow, removed 294 selfloop flow, removed 19 redundant places. [2023-08-27 13:50:51,579 INFO L231 Difference]: Finished difference. Result has 505 places, 1197 transitions, 20333 flow [2023-08-27 13:50:51,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=16182, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=20333, PETRI_PLACES=505, PETRI_TRANSITIONS=1197} [2023-08-27 13:50:51,580 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 466 predicate places. [2023-08-27 13:50:51,580 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1197 transitions, 20333 flow [2023-08-27 13:50:51,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 70.65517241379311) internal successors, (2049), 29 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:51,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:51,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:51,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-27 13:50:51,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:51,786 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:50:51,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1603176632, now seen corresponding path program 13 times [2023-08-27 13:50:51,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:51,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146682934] [2023-08-27 13:50:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:51,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:52,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:52,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146682934] [2023-08-27 13:50:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146682934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:52,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618389773] [2023-08-27 13:50:52,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:50:52,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:52,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:52,273 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:50:52,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-27 13:50:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:52,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:50:52,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:50:52,865 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:52,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2023-08-27 13:50:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:50:52,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:50:53,229 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:50:53,229 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 180 treesize of output 122 [2023-08-27 13:50:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:50:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618389773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:50:53,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:50:53,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2023-08-27 13:50:53,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645578800] [2023-08-27 13:50:53,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:50:53,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:50:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:50:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:50:53,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2023-08-27 13:50:53,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:50:53,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1197 transitions, 20333 flow. Second operand has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:53,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:50:53,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:50:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:50:56,923 INFO L124 PetriNetUnfolderBase]: 6867/10629 cut-off events. [2023-08-27 13:50:56,923 INFO L125 PetriNetUnfolderBase]: For 165615/165615 co-relation queries the response was YES. [2023-08-27 13:50:57,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89512 conditions, 10629 events. 6867/10629 cut-off events. For 165615/165615 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 60211 event pairs, 1466 based on Foata normal form. 15/10644 useless extension candidates. Maximal degree in co-relation 89380. Up to 9439 conditions per place. [2023-08-27 13:50:57,073 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 1098 selfloop transitions, 314 changer transitions 16/1428 dead transitions. [2023-08-27 13:50:57,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1428 transitions, 26586 flow [2023-08-27 13:50:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:50:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:50:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1950 transitions. [2023-08-27 13:50:57,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2023-08-27 13:50:57,093 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1950 transitions. [2023-08-27 13:50:57,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1950 transitions. [2023-08-27 13:50:57,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:50:57,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1950 transitions. [2023-08-27 13:50:57,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 78.0) internal successors, (1950), 25 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 13:50:57,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:57,097 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:57,097 INFO L175 Difference]: Start difference. First operand has 505 places, 1197 transitions, 20333 flow. Second operand 25 states and 1950 transitions. [2023-08-27 13:50:57,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1428 transitions, 26586 flow [2023-08-27 13:50:58,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1428 transitions, 25496 flow, removed 367 selfloop flow, removed 17 redundant places. [2023-08-27 13:50:58,629 INFO L231 Difference]: Finished difference. Result has 517 places, 1318 transitions, 22289 flow [2023-08-27 13:50:58,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=19261, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=947, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=22289, PETRI_PLACES=517, PETRI_TRANSITIONS=1318} [2023-08-27 13:50:58,630 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 478 predicate places. [2023-08-27 13:50:58,630 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 1318 transitions, 22289 flow [2023-08-27 13:50:58,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:50:58,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:50:58,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:50:58,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-27 13:50:58,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:58,836 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:50:58,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:50:58,836 INFO L85 PathProgramCache]: Analyzing trace with hash -424962646, now seen corresponding path program 14 times [2023-08-27 13:50:58,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:50:58,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895455079] [2023-08-27 13:50:58,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:50:58,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:50:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:50:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:50:59,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:50:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895455079] [2023-08-27 13:50:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895455079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:50:59,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072543807] [2023-08-27 13:50:59,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:50:59,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:50:59,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:50:59,400 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:50:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-27 13:50:59,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:50:59,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:50:59,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:50:59,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:00,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:00,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2023-08-27 13:51:00,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:00,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:00,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:00,364 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 202 treesize of output 170 [2023-08-27 13:51:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:00,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072543807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:00,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:00,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-27 13:51:00,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130159698] [2023-08-27 13:51:00,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:00,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 13:51:00,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 13:51:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-08-27 13:51:00,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:51:00,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 1318 transitions, 22289 flow. Second operand has 24 states, 24 states have (on average 75.0) internal successors, (1800), 24 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:00,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:00,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:51:00,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:04,458 INFO L124 PetriNetUnfolderBase]: 7395/11542 cut-off events. [2023-08-27 13:51:04,459 INFO L125 PetriNetUnfolderBase]: For 186322/186322 co-relation queries the response was YES. [2023-08-27 13:51:04,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98851 conditions, 11542 events. 7395/11542 cut-off events. For 186322/186322 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 67915 event pairs, 1457 based on Foata normal form. 15/11557 useless extension candidates. Maximal degree in co-relation 98712. Up to 10114 conditions per place. [2023-08-27 13:51:04,626 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 1197 selfloop transitions, 333 changer transitions 21/1551 dead transitions. [2023-08-27 13:51:04,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 1551 transitions, 29033 flow [2023-08-27 13:51:04,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:51:04,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:51:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1961 transitions. [2023-08-27 13:51:04,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2905185185185185 [2023-08-27 13:51:04,628 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1961 transitions. [2023-08-27 13:51:04,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1961 transitions. [2023-08-27 13:51:04,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:04,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1961 transitions. [2023-08-27 13:51:04,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 78.44) internal successors, (1961), 25 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:04,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:04,633 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:04,633 INFO L175 Difference]: Start difference. First operand has 517 places, 1318 transitions, 22289 flow. Second operand 25 states and 1961 transitions. [2023-08-27 13:51:04,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 1551 transitions, 29033 flow [2023-08-27 13:51:06,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1551 transitions, 27652 flow, removed 536 selfloop flow, removed 17 redundant places. [2023-08-27 13:51:06,519 INFO L231 Difference]: Finished difference. Result has 530 places, 1409 transitions, 23676 flow [2023-08-27 13:51:06,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=20926, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=23676, PETRI_PLACES=530, PETRI_TRANSITIONS=1409} [2023-08-27 13:51:06,520 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 491 predicate places. [2023-08-27 13:51:06,520 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 1409 transitions, 23676 flow [2023-08-27 13:51:06,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.0) internal successors, (1800), 24 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:06,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:06,520 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:06,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-27 13:51:06,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2023-08-27 13:51:06,726 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:51:06,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:06,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1622205304, now seen corresponding path program 15 times [2023-08-27 13:51:06,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:06,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786821947] [2023-08-27 13:51:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:06,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:07,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786821947] [2023-08-27 13:51:07,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786821947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:07,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950241948] [2023-08-27 13:51:07,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:51:07,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:07,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:07,467 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:51:07,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-27 13:51:07,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:51:07,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:51:07,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 13:51:07,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:08,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:08,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 95 treesize of output 77 [2023-08-27 13:51:08,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:08,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:08,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:08,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 216 treesize of output 187 [2023-08-27 13:51:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:11,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950241948] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:11,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:11,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-27 13:51:11,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815957883] [2023-08-27 13:51:11,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:11,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 13:51:11,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:11,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 13:51:11,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 13:51:11,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:51:11,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 1409 transitions, 23676 flow. Second operand has 33 states, 33 states have (on average 67.57575757575758) internal successors, (2230), 33 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:11,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:11,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:51:11,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:16,526 INFO L124 PetriNetUnfolderBase]: 7636/11978 cut-off events. [2023-08-27 13:51:16,527 INFO L125 PetriNetUnfolderBase]: For 202530/202530 co-relation queries the response was YES. [2023-08-27 13:51:16,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103962 conditions, 11978 events. 7636/11978 cut-off events. For 202530/202530 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 71435 event pairs, 1715 based on Foata normal form. 9/11987 useless extension candidates. Maximal degree in co-relation 103819. Up to 10767 conditions per place. [2023-08-27 13:51:16,729 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 1249 selfloop transitions, 331 changer transitions 25/1605 dead transitions. [2023-08-27 13:51:16,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 1605 transitions, 30251 flow [2023-08-27 13:51:16,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 13:51:16,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 13:51:16,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2195 transitions. [2023-08-27 13:51:16,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26224611708482676 [2023-08-27 13:51:16,731 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2195 transitions. [2023-08-27 13:51:16,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2195 transitions. [2023-08-27 13:51:16,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:16,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2195 transitions. [2023-08-27 13:51:16,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 70.80645161290323) internal successors, (2195), 31 states have internal predecessors, (2195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:16,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 270.0) internal successors, (8640), 32 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:16,736 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 270.0) internal successors, (8640), 32 states have internal predecessors, (8640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:16,736 INFO L175 Difference]: Start difference. First operand has 530 places, 1409 transitions, 23676 flow. Second operand 31 states and 2195 transitions. [2023-08-27 13:51:16,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 1605 transitions, 30251 flow [2023-08-27 13:51:19,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1605 transitions, 29040 flow, removed 433 selfloop flow, removed 16 redundant places. [2023-08-27 13:51:19,166 INFO L231 Difference]: Finished difference. Result has 552 places, 1476 transitions, 25040 flow [2023-08-27 13:51:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=22497, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25040, PETRI_PLACES=552, PETRI_TRANSITIONS=1476} [2023-08-27 13:51:19,167 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 513 predicate places. [2023-08-27 13:51:19,167 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 1476 transitions, 25040 flow [2023-08-27 13:51:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 67.57575757575758) internal successors, (2230), 33 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:19,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:19,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-08-27 13:51:19,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:19,373 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:51:19,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:19,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1980040402, now seen corresponding path program 16 times [2023-08-27 13:51:19,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:19,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115887623] [2023-08-27 13:51:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:19,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:19,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:20,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115887623] [2023-08-27 13:51:20,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115887623] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757268352] [2023-08-27 13:51:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:51:20,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:20,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:20,093 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:51:20,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-27 13:51:20,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:51:20,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:51:20,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:51:20,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:20,729 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:20,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2023-08-27 13:51:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:20,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:21,068 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:21,068 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 161 treesize of output 122 [2023-08-27 13:51:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:21,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757268352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:21,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:21,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-27 13:51:21,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464116607] [2023-08-27 13:51:21,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:21,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:51:21,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:51:21,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2023-08-27 13:51:21,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:51:21,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 1476 transitions, 25040 flow. Second operand has 25 states, 25 states have (on average 67.92) internal successors, (1698), 25 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:21,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:21,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:51:21,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:26,014 INFO L124 PetriNetUnfolderBase]: 7838/12338 cut-off events. [2023-08-27 13:51:26,014 INFO L125 PetriNetUnfolderBase]: For 214116/214116 co-relation queries the response was YES. [2023-08-27 13:51:26,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107485 conditions, 12338 events. 7838/12338 cut-off events. For 214116/214116 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 74441 event pairs, 1575 based on Foata normal form. 8/12346 useless extension candidates. Maximal degree in co-relation 107335. Up to 11305 conditions per place. [2023-08-27 13:51:26,176 INFO L140 encePairwiseOnDemand]: 259/270 looper letters, 1321 selfloop transitions, 278 changer transitions 9/1608 dead transitions. [2023-08-27 13:51:26,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1608 transitions, 30579 flow [2023-08-27 13:51:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 13:51:26,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 13:51:26,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1278 transitions. [2023-08-27 13:51:26,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26296296296296295 [2023-08-27 13:51:26,178 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1278 transitions. [2023-08-27 13:51:26,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1278 transitions. [2023-08-27 13:51:26,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:26,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1278 transitions. [2023-08-27 13:51:26,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 71.0) internal successors, (1278), 18 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:26,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:26,182 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 270.0) internal successors, (5130), 19 states have internal predecessors, (5130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:26,182 INFO L175 Difference]: Start difference. First operand has 552 places, 1476 transitions, 25040 flow. Second operand 18 states and 1278 transitions. [2023-08-27 13:51:26,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1608 transitions, 30579 flow [2023-08-27 13:51:28,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 1608 transitions, 29709 flow, removed 274 selfloop flow, removed 20 redundant places. [2023-08-27 13:51:28,248 INFO L231 Difference]: Finished difference. Result has 544 places, 1537 transitions, 26229 flow [2023-08-27 13:51:28,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=24178, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=26229, PETRI_PLACES=544, PETRI_TRANSITIONS=1537} [2023-08-27 13:51:28,249 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 505 predicate places. [2023-08-27 13:51:28,249 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 1537 transitions, 26229 flow [2023-08-27 13:51:28,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.92) internal successors, (1698), 25 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:28,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:28,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:28,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2023-08-27 13:51:28,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:28,455 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:51:28,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash -761753008, now seen corresponding path program 17 times [2023-08-27 13:51:28,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:28,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977975232] [2023-08-27 13:51:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977975232] [2023-08-27 13:51:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977975232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036575492] [2023-08-27 13:51:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:51:29,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:29,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:29,094 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:51:29,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-27 13:51:29,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:51:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:51:29,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:51:29,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:29,804 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:29,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2023-08-27 13:51:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:51:29,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:30,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:30,177 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 161 treesize of output 122 [2023-08-27 13:51:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036575492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:30,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-27 13:51:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049648084] [2023-08-27 13:51:30,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:30,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 13:51:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 13:51:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-08-27 13:51:30,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:51:30,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 1537 transitions, 26229 flow. Second operand has 26 states, 26 states have (on average 67.88461538461539) internal successors, (1765), 26 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:30,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:30,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:51:30,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:35,516 INFO L124 PetriNetUnfolderBase]: 8024/12663 cut-off events. [2023-08-27 13:51:35,516 INFO L125 PetriNetUnfolderBase]: For 225237/225237 co-relation queries the response was YES. [2023-08-27 13:51:35,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111110 conditions, 12663 events. 8024/12663 cut-off events. For 225237/225237 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 77414 event pairs, 1687 based on Foata normal form. 8/12671 useless extension candidates. Maximal degree in co-relation 110961. Up to 11771 conditions per place. [2023-08-27 13:51:35,688 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 1370 selfloop transitions, 266 changer transitions 8/1644 dead transitions. [2023-08-27 13:51:35,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1644 transitions, 31367 flow [2023-08-27 13:51:35,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 13:51:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 13:51:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1483 transitions. [2023-08-27 13:51:35,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2615520282186949 [2023-08-27 13:51:35,689 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1483 transitions. [2023-08-27 13:51:35,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1483 transitions. [2023-08-27 13:51:35,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:35,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1483 transitions. [2023-08-27 13:51:35,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 70.61904761904762) internal successors, (1483), 21 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:35,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:35,693 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:35,693 INFO L175 Difference]: Start difference. First operand has 544 places, 1537 transitions, 26229 flow. Second operand 21 states and 1483 transitions. [2023-08-27 13:51:35,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1644 transitions, 31367 flow [2023-08-27 13:51:38,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 1644 transitions, 30265 flow, removed 443 selfloop flow, removed 13 redundant places. [2023-08-27 13:51:38,055 INFO L231 Difference]: Finished difference. Result has 554 places, 1577 transitions, 26812 flow [2023-08-27 13:51:38,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=25275, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=26812, PETRI_PLACES=554, PETRI_TRANSITIONS=1577} [2023-08-27 13:51:38,056 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 515 predicate places. [2023-08-27 13:51:38,056 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1577 transitions, 26812 flow [2023-08-27 13:51:38,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 67.88461538461539) internal successors, (1765), 26 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:38,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:38,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:38,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-27 13:51:38,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:38,263 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:51:38,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:38,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1320211188, now seen corresponding path program 18 times [2023-08-27 13:51:38,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:38,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525601144] [2023-08-27 13:51:38,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:38,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:38,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525601144] [2023-08-27 13:51:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525601144] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341614157] [2023-08-27 13:51:38,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:51:38,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:38,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:38,888 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:51:38,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-27 13:51:39,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 13:51:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:51:39,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:51:39,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:39,550 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:39,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2023-08-27 13:51:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:39,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:39,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:39,916 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 202 treesize of output 170 [2023-08-27 13:51:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:40,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341614157] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:40,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:40,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-27 13:51:40,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129695834] [2023-08-27 13:51:40,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:40,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:51:40,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:40,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:51:40,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2023-08-27 13:51:40,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:51:40,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1577 transitions, 26812 flow. Second operand has 25 states, 25 states have (on average 67.92) internal successors, (1698), 25 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:40,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:40,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:51:40,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:45,810 INFO L124 PetriNetUnfolderBase]: 8558/13593 cut-off events. [2023-08-27 13:51:45,810 INFO L125 PetriNetUnfolderBase]: For 243855/243855 co-relation queries the response was YES. [2023-08-27 13:51:45,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119721 conditions, 13593 events. 8558/13593 cut-off events. For 243855/243855 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 85317 event pairs, 1749 based on Foata normal form. 15/13608 useless extension candidates. Maximal degree in co-relation 119571. Up to 12262 conditions per place. [2023-08-27 13:51:45,985 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 1492 selfloop transitions, 305 changer transitions 17/1814 dead transitions. [2023-08-27 13:51:45,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 1814 transitions, 34734 flow [2023-08-27 13:51:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:51:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:51:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1779 transitions. [2023-08-27 13:51:45,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26355555555555554 [2023-08-27 13:51:45,987 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1779 transitions. [2023-08-27 13:51:45,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1779 transitions. [2023-08-27 13:51:45,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:45,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1779 transitions. [2023-08-27 13:51:45,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 71.16) internal successors, (1779), 25 states have internal predecessors, (1779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:45,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:45,992 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:45,992 INFO L175 Difference]: Start difference. First operand has 554 places, 1577 transitions, 26812 flow. Second operand 25 states and 1779 transitions. [2023-08-27 13:51:45,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 1814 transitions, 34734 flow [2023-08-27 13:51:48,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 1814 transitions, 34051 flow, removed 217 selfloop flow, removed 13 redundant places. [2023-08-27 13:51:48,508 INFO L231 Difference]: Finished difference. Result has 572 places, 1686 transitions, 29745 flow [2023-08-27 13:51:48,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=26157, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29745, PETRI_PLACES=572, PETRI_TRANSITIONS=1686} [2023-08-27 13:51:48,509 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 533 predicate places. [2023-08-27 13:51:48,509 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1686 transitions, 29745 flow [2023-08-27 13:51:48,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 67.92) internal successors, (1698), 25 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:48,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:51:48,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:51:48,516 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-08-27 13:51:48,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2023-08-27 13:51:48,716 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:51:48,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:51:48,716 INFO L85 PathProgramCache]: Analyzing trace with hash 914018918, now seen corresponding path program 19 times [2023-08-27 13:51:48,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:51:48,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783866631] [2023-08-27 13:51:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:51:48,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:51:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:51:49,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:51:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783866631] [2023-08-27 13:51:49,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783866631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:51:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568964311] [2023-08-27 13:51:49,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:51:49,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:51:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:51:49,461 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:51:49,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-27 13:51:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:51:49,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:51:49,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:51:50,150 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:50,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2023-08-27 13:51:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:51:50,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:51:50,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:51:50,505 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 134 treesize of output 114 [2023-08-27 13:51:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:51:50,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568964311] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:51:50,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:51:50,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-27 13:51:50,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362874654] [2023-08-27 13:51:50,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:51:50,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 13:51:50,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:51:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 13:51:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2023-08-27 13:51:50,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:51:50,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1686 transitions, 29745 flow. Second operand has 26 states, 26 states have (on average 67.88461538461539) internal successors, (1765), 26 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:50,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:51:50,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:51:50,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:51:57,254 INFO L124 PetriNetUnfolderBase]: 8982/14302 cut-off events. [2023-08-27 13:51:57,254 INFO L125 PetriNetUnfolderBase]: For 281192/281192 co-relation queries the response was YES. [2023-08-27 13:51:57,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129441 conditions, 14302 events. 8982/14302 cut-off events. For 281192/281192 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 91010 event pairs, 1901 based on Foata normal form. 15/14317 useless extension candidates. Maximal degree in co-relation 129284. Up to 12999 conditions per place. [2023-08-27 13:51:57,466 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 1500 selfloop transitions, 407 changer transitions 10/1917 dead transitions. [2023-08-27 13:51:57,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 1917 transitions, 38068 flow [2023-08-27 13:51:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 13:51:57,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 13:51:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1848 transitions. [2023-08-27 13:51:57,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26324786324786326 [2023-08-27 13:51:57,469 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1848 transitions. [2023-08-27 13:51:57,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1848 transitions. [2023-08-27 13:51:57,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:51:57,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1848 transitions. [2023-08-27 13:51:57,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 71.07692307692308) internal successors, (1848), 26 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:57,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:57,474 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 270.0) internal successors, (7290), 27 states have internal predecessors, (7290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:51:57,474 INFO L175 Difference]: Start difference. First operand has 572 places, 1686 transitions, 29745 flow. Second operand 26 states and 1848 transitions. [2023-08-27 13:51:57,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 1917 transitions, 38068 flow [2023-08-27 13:52:00,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 1917 transitions, 36277 flow, removed 730 selfloop flow, removed 19 redundant places. [2023-08-27 13:52:00,891 INFO L231 Difference]: Finished difference. Result has 583 places, 1818 transitions, 32422 flow [2023-08-27 13:52:00,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=27964, PETRI_DIFFERENCE_MINUEND_PLACES=552, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=32422, PETRI_PLACES=583, PETRI_TRANSITIONS=1818} [2023-08-27 13:52:00,892 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 544 predicate places. [2023-08-27 13:52:00,892 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 1818 transitions, 32422 flow [2023-08-27 13:52:00,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 67.88461538461539) internal successors, (1765), 26 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:00,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:00,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:00,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-27 13:52:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-08-27 13:52:01,098 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:52:01,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash 868265674, now seen corresponding path program 20 times [2023-08-27 13:52:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:01,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704535428] [2023-08-27 13:52:01,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:01,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704535428] [2023-08-27 13:52:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704535428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68504440] [2023-08-27 13:52:01,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:52:01,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:01,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:01,648 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:52:01,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-27 13:52:02,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:52:02,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:02,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 13:52:02,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:02,285 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:02,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2023-08-27 13:52:02,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:02,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:52:02,680 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:02,680 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 182 treesize of output 124 [2023-08-27 13:52:02,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:02,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68504440] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:52:02,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:52:02,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 22 [2023-08-27 13:52:02,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043266598] [2023-08-27 13:52:02,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:52:02,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 13:52:02,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:02,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 13:52:02,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-08-27 13:52:02,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:52:02,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 1818 transitions, 32422 flow. Second operand has 24 states, 24 states have (on average 75.0) internal successors, (1800), 24 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:02,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:02,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:52:02,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:52:09,748 INFO L124 PetriNetUnfolderBase]: 9376/14979 cut-off events. [2023-08-27 13:52:09,748 INFO L125 PetriNetUnfolderBase]: For 314071/314071 co-relation queries the response was YES. [2023-08-27 13:52:09,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137499 conditions, 14979 events. 9376/14979 cut-off events. For 314071/314071 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 96670 event pairs, 1991 based on Foata normal form. 15/14994 useless extension candidates. Maximal degree in co-relation 137338. Up to 13855 conditions per place. [2023-08-27 13:52:10,017 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 1714 selfloop transitions, 297 changer transitions 16/2027 dead transitions. [2023-08-27 13:52:10,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 2027 transitions, 40715 flow [2023-08-27 13:52:10,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:52:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:52:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1943 transitions. [2023-08-27 13:52:10,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28785185185185186 [2023-08-27 13:52:10,019 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1943 transitions. [2023-08-27 13:52:10,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1943 transitions. [2023-08-27 13:52:10,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:52:10,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1943 transitions. [2023-08-27 13:52:10,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.72) internal successors, (1943), 25 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:10,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:10,023 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 270.0) internal successors, (7020), 26 states have internal predecessors, (7020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:10,023 INFO L175 Difference]: Start difference. First operand has 583 places, 1818 transitions, 32422 flow. Second operand 25 states and 1943 transitions. [2023-08-27 13:52:10,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 2027 transitions, 40715 flow [2023-08-27 13:52:13,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 2027 transitions, 38460 flow, removed 921 selfloop flow, removed 19 redundant places. [2023-08-27 13:52:13,891 INFO L231 Difference]: Finished difference. Result has 595 places, 1922 transitions, 33820 flow [2023-08-27 13:52:13,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=30167, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=33820, PETRI_PLACES=595, PETRI_TRANSITIONS=1922} [2023-08-27 13:52:13,892 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 556 predicate places. [2023-08-27 13:52:13,892 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 1922 transitions, 33820 flow [2023-08-27 13:52:13,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.0) internal successors, (1800), 24 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:13,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-27 13:52:14,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-08-27 13:52:14,099 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:52:14,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash 74524974, now seen corresponding path program 21 times [2023-08-27 13:52:14,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:14,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899171935] [2023-08-27 13:52:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:14,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:14,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:14,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899171935] [2023-08-27 13:52:14,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899171935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:14,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854967326] [2023-08-27 13:52:14,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:52:14,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:14,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:14,551 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:52:14,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-27 13:52:14,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:52:14,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:14,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 13:52:15,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:15,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:15,469 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 149 treesize of output 133 [2023-08-27 13:52:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:15,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:52:16,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:16,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 196 treesize of output 187 [2023-08-27 13:52:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:17,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854967326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:52:17,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:52:17,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-27 13:52:17,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189687909] [2023-08-27 13:52:17,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:52:17,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 13:52:17,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:17,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 13:52:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2023-08-27 13:52:17,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:52:17,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 1922 transitions, 33820 flow. Second operand has 32 states, 32 states have (on average 74.625) internal successors, (2388), 32 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:17,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:17,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:52:17,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:52:25,051 INFO L124 PetriNetUnfolderBase]: 9346/14928 cut-off events. [2023-08-27 13:52:25,051 INFO L125 PetriNetUnfolderBase]: For 316701/316701 co-relation queries the response was YES. [2023-08-27 13:52:25,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136755 conditions, 14928 events. 9346/14928 cut-off events. For 316701/316701 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 96156 event pairs, 2128 based on Foata normal form. 1/14929 useless extension candidates. Maximal degree in co-relation 136586. Up to 14279 conditions per place. [2023-08-27 13:52:25,292 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 1785 selfloop transitions, 158 changer transitions 22/1965 dead transitions. [2023-08-27 13:52:25,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1965 transitions, 38056 flow [2023-08-27 13:52:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 13:52:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 13:52:25,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1855 transitions. [2023-08-27 13:52:25,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2862654320987654 [2023-08-27 13:52:25,294 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1855 transitions. [2023-08-27 13:52:25,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1855 transitions. [2023-08-27 13:52:25,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:52:25,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1855 transitions. [2023-08-27 13:52:25,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 77.29166666666667) internal successors, (1855), 24 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:25,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:25,298 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:25,298 INFO L175 Difference]: Start difference. First operand has 595 places, 1922 transitions, 33820 flow. Second operand 24 states and 1855 transitions. [2023-08-27 13:52:25,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1965 transitions, 38056 flow [2023-08-27 13:52:29,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1965 transitions, 36019 flow, removed 888 selfloop flow, removed 16 redundant places. [2023-08-27 13:52:29,109 INFO L231 Difference]: Finished difference. Result has 606 places, 1914 transitions, 31993 flow [2023-08-27 13:52:29,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=31787, PETRI_DIFFERENCE_MINUEND_PLACES=579, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1764, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=31993, PETRI_PLACES=606, PETRI_TRANSITIONS=1914} [2023-08-27 13:52:29,110 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 567 predicate places. [2023-08-27 13:52:29,110 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 1914 transitions, 31993 flow [2023-08-27 13:52:29,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.625) internal successors, (2388), 32 states have internal predecessors, (2388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:29,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:29,110 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:29,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-08-27 13:52:29,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:29,317 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:52:29,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1817769128, now seen corresponding path program 22 times [2023-08-27 13:52:29,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:29,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284127469] [2023-08-27 13:52:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:29,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284127469] [2023-08-27 13:52:29,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284127469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:29,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651325990] [2023-08-27 13:52:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:52:29,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:29,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:29,809 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:52:29,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-27 13:52:30,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:52:30,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:30,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:52:30,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:30,500 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:30,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 51 [2023-08-27 13:52:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:52:30,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:52:30,904 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:30,904 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 146 treesize of output 114 [2023-08-27 13:52:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:31,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651325990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:52:31,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:52:31,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2023-08-27 13:52:31,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748783589] [2023-08-27 13:52:31,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:52:31,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:52:31,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:31,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:52:31,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-27 13:52:31,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 270 [2023-08-27 13:52:31,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1914 transitions, 31993 flow. Second operand has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:31,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:31,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 270 [2023-08-27 13:52:31,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:52:38,469 INFO L124 PetriNetUnfolderBase]: 9752/15604 cut-off events. [2023-08-27 13:52:38,470 INFO L125 PetriNetUnfolderBase]: For 329492/329492 co-relation queries the response was YES. [2023-08-27 13:52:38,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141852 conditions, 15604 events. 9752/15604 cut-off events. For 329492/329492 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 101882 event pairs, 2093 based on Foata normal form. 15/15619 useless extension candidates. Maximal degree in co-relation 141680. Up to 14400 conditions per place. [2023-08-27 13:52:38,695 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 1734 selfloop transitions, 349 changer transitions 12/2095 dead transitions. [2023-08-27 13:52:38,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 2095 transitions, 39970 flow [2023-08-27 13:52:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 13:52:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 13:52:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1723 transitions. [2023-08-27 13:52:38,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2900673400673401 [2023-08-27 13:52:38,697 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1723 transitions. [2023-08-27 13:52:38,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1723 transitions. [2023-08-27 13:52:38,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:52:38,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1723 transitions. [2023-08-27 13:52:38,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.31818181818181) internal successors, (1723), 22 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:38,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 270.0) internal successors, (6210), 23 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:38,701 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 270.0) internal successors, (6210), 23 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:38,701 INFO L175 Difference]: Start difference. First operand has 606 places, 1914 transitions, 31993 flow. Second operand 22 states and 1723 transitions. [2023-08-27 13:52:38,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 2095 transitions, 39970 flow [2023-08-27 13:52:42,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 2095 transitions, 39752 flow, removed 14 selfloop flow, removed 18 redundant places. [2023-08-27 13:52:42,553 INFO L231 Difference]: Finished difference. Result has 608 places, 1997 transitions, 35196 flow [2023-08-27 13:52:42,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=31789, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=35196, PETRI_PLACES=608, PETRI_TRANSITIONS=1997} [2023-08-27 13:52:42,554 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 569 predicate places. [2023-08-27 13:52:42,554 INFO L495 AbstractCegarLoop]: Abstraction has has 608 places, 1997 transitions, 35196 flow [2023-08-27 13:52:42,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 74.96) internal successors, (1874), 25 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:42,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:42,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:42,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-27 13:52:42,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:42,760 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:52:42,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash -632665774, now seen corresponding path program 23 times [2023-08-27 13:52:42,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:42,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868156478] [2023-08-27 13:52:42,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:42,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:52:43,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:43,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868156478] [2023-08-27 13:52:43,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868156478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:43,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182363574] [2023-08-27 13:52:43,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:52:43,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:43,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:43,437 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:52:43,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-27 13:52:43,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 13:52:43,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:43,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 13:52:43,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:44,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:44,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 58 [2023-08-27 13:52:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:52:44,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:52:44,502 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:52:44,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 179 [2023-08-27 13:52:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:44,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182363574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:52:44,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:52:44,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 24 [2023-08-27 13:52:44,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273714043] [2023-08-27 13:52:44,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:52:44,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 13:52:44,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 13:52:44,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2023-08-27 13:52:44,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 270 [2023-08-27 13:52:44,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 608 places, 1997 transitions, 35196 flow. Second operand has 26 states, 26 states have (on average 67.8076923076923) internal successors, (1763), 26 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:44,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:44,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 270 [2023-08-27 13:52:44,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:52:52,462 INFO L124 PetriNetUnfolderBase]: 10062/16115 cut-off events. [2023-08-27 13:52:52,463 INFO L125 PetriNetUnfolderBase]: For 388721/388721 co-relation queries the response was YES. [2023-08-27 13:52:52,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152049 conditions, 16115 events. 10062/16115 cut-off events. For 388721/388721 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 106125 event pairs, 2203 based on Foata normal form. 15/16130 useless extension candidates. Maximal degree in co-relation 151875. Up to 15070 conditions per place. [2023-08-27 13:52:52,711 INFO L140 encePairwiseOnDemand]: 255/270 looper letters, 1824 selfloop transitions, 324 changer transitions 21/2169 dead transitions. [2023-08-27 13:52:52,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 2169 transitions, 43324 flow [2023-08-27 13:52:52,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 13:52:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 13:52:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1634 transitions. [2023-08-27 13:52:52,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2631239935587762 [2023-08-27 13:52:52,713 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1634 transitions. [2023-08-27 13:52:52,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1634 transitions. [2023-08-27 13:52:52,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:52:52,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1634 transitions. [2023-08-27 13:52:52,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 71.04347826086956) internal successors, (1634), 23 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:52,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 270.0) internal successors, (6480), 24 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:52,717 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 270.0) internal successors, (6480), 24 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:52,717 INFO L175 Difference]: Start difference. First operand has 608 places, 1997 transitions, 35196 flow. Second operand 23 states and 1634 transitions. [2023-08-27 13:52:52,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 2169 transitions, 43324 flow [2023-08-27 13:52:57,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2169 transitions, 41902 flow, removed 599 selfloop flow, removed 14 redundant places. [2023-08-27 13:52:57,510 INFO L231 Difference]: Finished difference. Result has 619 places, 2074 transitions, 37064 flow [2023-08-27 13:52:57,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=33774, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=37064, PETRI_PLACES=619, PETRI_TRANSITIONS=2074} [2023-08-27 13:52:57,511 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 580 predicate places. [2023-08-27 13:52:57,511 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 2074 transitions, 37064 flow [2023-08-27 13:52:57,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 67.8076923076923) internal successors, (1763), 26 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:57,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:52:57,511 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:52:57,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-27 13:52:57,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:57,718 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:52:57,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:52:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash -110802398, now seen corresponding path program 24 times [2023-08-27 13:52:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:52:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736082263] [2023-08-27 13:52:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:52:57,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:52:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:52:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:52:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736082263] [2023-08-27 13:52:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736082263] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:52:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538878506] [2023-08-27 13:52:57,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:52:57,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:52:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:52:57,822 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:52:57,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-27 13:52:58,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 13:52:58,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:52:58,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:52:58,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:52:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:58,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:52:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:52:58,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538878506] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:52:58,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:52:58,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 13:52:58,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816229836] [2023-08-27 13:52:58,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:52:58,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 13:52:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:52:58,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 13:52:58,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-27 13:52:58,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:52:58,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 2074 transitions, 37064 flow. Second operand has 19 states, 19 states have (on average 90.94736842105263) internal successors, (1728), 19 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:52:58,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:52:58,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:52:58,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:53:04,243 INFO L124 PetriNetUnfolderBase]: 7913/12692 cut-off events. [2023-08-27 13:53:04,243 INFO L125 PetriNetUnfolderBase]: For 373681/373878 co-relation queries the response was YES. [2023-08-27 13:53:04,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117729 conditions, 12692 events. 7913/12692 cut-off events. For 373681/373878 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 80553 event pairs, 1891 based on Foata normal form. 1205/13834 useless extension candidates. Maximal degree in co-relation 117549. Up to 7813 conditions per place. [2023-08-27 13:53:04,448 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1358 selfloop transitions, 709 changer transitions 7/2112 dead transitions. [2023-08-27 13:53:04,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 2112 transitions, 42385 flow [2023-08-27 13:53:04,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:53:04,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:53:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1034 transitions. [2023-08-27 13:53:04,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2023-08-27 13:53:04,449 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1034 transitions. [2023-08-27 13:53:04,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1034 transitions. [2023-08-27 13:53:04,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:53:04,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1034 transitions. [2023-08-27 13:53:04,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 94.0) internal successors, (1034), 11 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:04,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:04,451 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:04,451 INFO L175 Difference]: Start difference. First operand has 619 places, 2074 transitions, 37064 flow. Second operand 11 states and 1034 transitions. [2023-08-27 13:53:04,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 2112 transitions, 42385 flow [2023-08-27 13:53:08,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 2112 transitions, 39132 flow, removed 1056 selfloop flow, removed 24 redundant places. [2023-08-27 13:53:08,122 INFO L231 Difference]: Finished difference. Result has 591 places, 1902 transitions, 32085 flow [2023-08-27 13:53:08,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=30754, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32085, PETRI_PLACES=591, PETRI_TRANSITIONS=1902} [2023-08-27 13:53:08,123 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 552 predicate places. [2023-08-27 13:53:08,123 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1902 transitions, 32085 flow [2023-08-27 13:53:08,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.94736842105263) internal successors, (1728), 19 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:08,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:53:08,123 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:53:08,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-27 13:53:08,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:08,329 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:53:08,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:53:08,330 INFO L85 PathProgramCache]: Analyzing trace with hash 999139719, now seen corresponding path program 9 times [2023-08-27 13:53:08,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:53:08,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383217733] [2023-08-27 13:53:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:53:08,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:53:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:53:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:08,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:53:08,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383217733] [2023-08-27 13:53:08,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383217733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:53:08,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232310585] [2023-08-27 13:53:08,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:53:08,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:08,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:53:08,884 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:53:08,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-27 13:53:09,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 13:53:09,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:53:09,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-27 13:53:09,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:53:09,715 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:53:09,753 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-27 13:53:09,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-08-27 13:53:09,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:09,785 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 13:53:09,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:09,815 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 13:53:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:10,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:53:10,363 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3544 (Array Int Int)) (v_ArrVal_3545 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3544) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3545) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 24 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 9223372039002259456)) is different from false [2023-08-27 13:53:10,454 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:53:10,454 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 34 treesize of output 40 [2023-08-27 13:53:10,459 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:53:10,459 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 71 treesize of output 65 [2023-08-27 13:53:10,462 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 54 treesize of output 46 [2023-08-27 13:53:10,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-27 13:53:10,818 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2023-08-27 13:53:10,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232310585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:53:10,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:53:10,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2023-08-27 13:53:10,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132823841] [2023-08-27 13:53:10,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:53:10,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-08-27 13:53:10,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:53:10,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-08-27 13:53:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2784, Unknown=20, NotChecked=106, Total=3080 [2023-08-27 13:53:10,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:53:10,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1902 transitions, 32085 flow. Second operand has 56 states, 56 states have (on average 82.125) internal successors, (4599), 56 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:10,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:53:10,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:53:10,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:53:17,867 INFO L124 PetriNetUnfolderBase]: 7929/12720 cut-off events. [2023-08-27 13:53:17,867 INFO L125 PetriNetUnfolderBase]: For 284903/284939 co-relation queries the response was YES. [2023-08-27 13:53:18,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114746 conditions, 12720 events. 7929/12720 cut-off events. For 284903/284939 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 80278 event pairs, 2136 based on Foata normal form. 80/12794 useless extension candidates. Maximal degree in co-relation 114573. Up to 6333 conditions per place. [2023-08-27 13:53:18,063 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1940 selfloop transitions, 410 changer transitions 0/2394 dead transitions. [2023-08-27 13:53:18,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 2394 transitions, 45320 flow [2023-08-27 13:53:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 13:53:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 13:53:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1652 transitions. [2023-08-27 13:53:18,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3220272904483431 [2023-08-27 13:53:18,064 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1652 transitions. [2023-08-27 13:53:18,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1652 transitions. [2023-08-27 13:53:18,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:53:18,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1652 transitions. [2023-08-27 13:53:18,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 86.94736842105263) internal successors, (1652), 19 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:18,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 270.0) internal successors, (5400), 20 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:18,068 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 270.0) internal successors, (5400), 20 states have internal predecessors, (5400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:18,068 INFO L175 Difference]: Start difference. First operand has 591 places, 1902 transitions, 32085 flow. Second operand 19 states and 1652 transitions. [2023-08-27 13:53:18,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 2394 transitions, 45320 flow [2023-08-27 13:53:21,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 2394 transitions, 43296 flow, removed 70 selfloop flow, removed 17 redundant places. [2023-08-27 13:53:21,132 INFO L231 Difference]: Finished difference. Result has 592 places, 1896 transitions, 30928 flow [2023-08-27 13:53:21,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=30108, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=30928, PETRI_PLACES=592, PETRI_TRANSITIONS=1896} [2023-08-27 13:53:21,133 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 553 predicate places. [2023-08-27 13:53:21,133 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1896 transitions, 30928 flow [2023-08-27 13:53:21,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 82.125) internal successors, (4599), 56 states have internal predecessors, (4599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:21,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:53:21,134 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1] [2023-08-27 13:53:21,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-08-27 13:53:21,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:21,341 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:53:21,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:53:21,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1221684474, now seen corresponding path program 10 times [2023-08-27 13:53:21,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:53:21,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132923378] [2023-08-27 13:53:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:53:21,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:53:21,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:53:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:21,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:53:21,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132923378] [2023-08-27 13:53:21,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132923378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:53:21,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185467522] [2023-08-27 13:53:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:53:21,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:21,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:53:21,888 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:53:21,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-27 13:53:22,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:53:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:53:22,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-27 13:53:22,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:53:22,540 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 13:53:22,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:22,576 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 23 treesize of output 22 [2023-08-27 13:53:22,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:22,606 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 13:53:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:22,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:53:23,192 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:53:23,192 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 33 treesize of output 39 [2023-08-27 13:53:23,197 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:53:23,198 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 43 treesize of output 37 [2023-08-27 13:53:23,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-27 13:53:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185467522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:53:23,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:53:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-27 13:53:23,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966408356] [2023-08-27 13:53:23,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:53:23,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-27 13:53:23,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:53:23,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-27 13:53:23,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2977, Unknown=29, NotChecked=0, Total=3192 [2023-08-27 13:53:23,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:53:23,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1896 transitions, 30928 flow. Second operand has 57 states, 57 states have (on average 85.0701754385965) internal successors, (4849), 57 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:23,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:53:23,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:53:23,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:53:29,899 INFO L124 PetriNetUnfolderBase]: 7780/12496 cut-off events. [2023-08-27 13:53:29,899 INFO L125 PetriNetUnfolderBase]: For 255654/255761 co-relation queries the response was YES. [2023-08-27 13:53:30,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111590 conditions, 12496 events. 7780/12496 cut-off events. For 255654/255761 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 79240 event pairs, 3152 based on Foata normal form. 90/12510 useless extension candidates. Maximal degree in co-relation 111424. Up to 12180 conditions per place. [2023-08-27 13:53:30,091 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 1814 selfloop transitions, 70 changer transitions 0/1922 dead transitions. [2023-08-27 13:53:30,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1922 transitions, 35354 flow [2023-08-27 13:53:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 13:53:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 13:53:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1918 transitions. [2023-08-27 13:53:30,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3228956228956229 [2023-08-27 13:53:30,093 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1918 transitions. [2023-08-27 13:53:30,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1918 transitions. [2023-08-27 13:53:30,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:53:30,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1918 transitions. [2023-08-27 13:53:30,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.18181818181819) internal successors, (1918), 22 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:30,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 270.0) internal successors, (6210), 23 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:30,096 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 270.0) internal successors, (6210), 23 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:30,097 INFO L175 Difference]: Start difference. First operand has 592 places, 1896 transitions, 30928 flow. Second operand 22 states and 1918 transitions. [2023-08-27 13:53:30,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1922 transitions, 35354 flow [2023-08-27 13:53:32,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1922 transitions, 34622 flow, removed 13 selfloop flow, removed 15 redundant places. [2023-08-27 13:53:32,713 INFO L231 Difference]: Finished difference. Result has 600 places, 1903 transitions, 30565 flow [2023-08-27 13:53:32,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=30215, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=30565, PETRI_PLACES=600, PETRI_TRANSITIONS=1903} [2023-08-27 13:53:32,715 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 561 predicate places. [2023-08-27 13:53:32,715 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 1903 transitions, 30565 flow [2023-08-27 13:53:32,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 85.0701754385965) internal successors, (4849), 57 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:32,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:53:32,716 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1] [2023-08-27 13:53:32,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-08-27 13:53:32,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:32,923 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:53:32,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:53:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1221684475, now seen corresponding path program 10 times [2023-08-27 13:53:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:53:32,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059073887] [2023-08-27 13:53:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:53:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:53:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:53:33,516 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:33,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:53:33,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059073887] [2023-08-27 13:53:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059073887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:53:33,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120690978] [2023-08-27 13:53:33,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:53:33,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:33,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:53:33,518 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:53:33,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-08-27 13:53:33,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:53:33,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:53:34,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-27 13:53:34,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:53:34,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:53:34,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:34,234 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 21 treesize of output 20 [2023-08-27 13:53:34,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:34,260 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 13:53:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:34,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:53:34,707 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:53:34,708 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 37 [2023-08-27 13:53:34,712 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:53:34,712 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 37 treesize of output 31 [2023-08-27 13:53:34,718 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 7 treesize of output 3 [2023-08-27 13:53:34,901 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:34,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120690978] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:53:34,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:53:34,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-27 13:53:34,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477249678] [2023-08-27 13:53:34,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:53:34,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-27 13:53:34,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:53:34,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-27 13:53:34,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2990, Unknown=16, NotChecked=0, Total=3192 [2023-08-27 13:53:34,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:53:34,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 1903 transitions, 30565 flow. Second operand has 57 states, 57 states have (on average 85.0701754385965) internal successors, (4849), 57 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:34,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:53:34,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:53:34,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:53:40,879 INFO L124 PetriNetUnfolderBase]: 7793/12513 cut-off events. [2023-08-27 13:53:40,879 INFO L125 PetriNetUnfolderBase]: For 255537/255608 co-relation queries the response was YES. [2023-08-27 13:53:41,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110668 conditions, 12513 events. 7793/12513 cut-off events. For 255537/255608 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 79090 event pairs, 3060 based on Foata normal form. 66/12490 useless extension candidates. Maximal degree in co-relation 110500. Up to 12162 conditions per place. [2023-08-27 13:53:41,083 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 1809 selfloop transitions, 70 changer transitions 0/1917 dead transitions. [2023-08-27 13:53:41,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1917 transitions, 34645 flow [2023-08-27 13:53:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 13:53:41,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 13:53:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1917 transitions. [2023-08-27 13:53:41,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32272727272727275 [2023-08-27 13:53:41,086 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1917 transitions. [2023-08-27 13:53:41,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1917 transitions. [2023-08-27 13:53:41,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:53:41,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1917 transitions. [2023-08-27 13:53:41,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 87.13636363636364) internal successors, (1917), 22 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:41,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 270.0) internal successors, (6210), 23 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:41,090 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 270.0) internal successors, (6210), 23 states have internal predecessors, (6210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:41,090 INFO L175 Difference]: Start difference. First operand has 600 places, 1903 transitions, 30565 flow. Second operand 22 states and 1917 transitions. [2023-08-27 13:53:41,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1917 transitions, 34645 flow [2023-08-27 13:53:44,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1917 transitions, 34440 flow, removed 37 selfloop flow, removed 19 redundant places. [2023-08-27 13:53:44,058 INFO L231 Difference]: Finished difference. Result has 602 places, 1901 transitions, 30443 flow [2023-08-27 13:53:44,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=30303, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1831, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=30443, PETRI_PLACES=602, PETRI_TRANSITIONS=1901} [2023-08-27 13:53:44,059 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 563 predicate places. [2023-08-27 13:53:44,059 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 1901 transitions, 30443 flow [2023-08-27 13:53:44,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 85.0701754385965) internal successors, (4849), 57 states have internal predecessors, (4849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:44,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:53:44,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:53:44,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-08-27 13:53:44,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2023-08-27 13:53:44,267 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:53:44,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:53:44,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1452374276, now seen corresponding path program 25 times [2023-08-27 13:53:44,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:53:44,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980511366] [2023-08-27 13:53:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:53:44,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:53:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:53:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 13:53:44,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:53:44,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980511366] [2023-08-27 13:53:44,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980511366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:53:44,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813463382] [2023-08-27 13:53:44,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:53:44,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:44,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:53:44,366 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:53:44,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-08-27 13:53:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:53:44,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 13:53:44,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:53:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 13:53:44,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:53:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 13:53:44,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813463382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:53:44,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:53:44,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 13:53:44,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883290306] [2023-08-27 13:53:44,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:53:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 13:53:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:53:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 13:53:44,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-08-27 13:53:44,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:53:44,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 1901 transitions, 30443 flow. Second operand has 19 states, 19 states have (on average 90.78947368421052) internal successors, (1725), 19 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:44,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:53:44,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:53:44,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:53:49,975 INFO L124 PetriNetUnfolderBase]: 6858/11242 cut-off events. [2023-08-27 13:53:49,976 INFO L125 PetriNetUnfolderBase]: For 247547/247559 co-relation queries the response was YES. [2023-08-27 13:53:50,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95614 conditions, 11242 events. 6858/11242 cut-off events. For 247547/247559 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 71841 event pairs, 1642 based on Foata normal form. 873/12112 useless extension candidates. Maximal degree in co-relation 95447. Up to 6925 conditions per place. [2023-08-27 13:53:50,145 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1475 selfloop transitions, 551 changer transitions 9/2079 dead transitions. [2023-08-27 13:53:50,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 2079 transitions, 38003 flow [2023-08-27 13:53:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:53:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:53:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1034 transitions. [2023-08-27 13:53:50,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34814814814814815 [2023-08-27 13:53:50,147 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1034 transitions. [2023-08-27 13:53:50,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1034 transitions. [2023-08-27 13:53:50,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:53:50,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1034 transitions. [2023-08-27 13:53:50,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 94.0) internal successors, (1034), 11 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:50,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:50,149 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 270.0) internal successors, (3240), 12 states have internal predecessors, (3240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:50,149 INFO L175 Difference]: Start difference. First operand has 602 places, 1901 transitions, 30443 flow. Second operand 11 states and 1034 transitions. [2023-08-27 13:53:50,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 2079 transitions, 38003 flow [2023-08-27 13:53:52,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 2079 transitions, 37096 flow, removed 334 selfloop flow, removed 23 redundant places. [2023-08-27 13:53:52,453 INFO L231 Difference]: Finished difference. Result has 587 places, 1756 transitions, 28550 flow [2023-08-27 13:53:52,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=27553, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=551, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=28550, PETRI_PLACES=587, PETRI_TRANSITIONS=1756} [2023-08-27 13:53:52,454 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 548 predicate places. [2023-08-27 13:53:52,454 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 1756 transitions, 28550 flow [2023-08-27 13:53:52,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 90.78947368421052) internal successors, (1725), 19 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:52,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:53:52,458 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:53:52,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-08-27 13:53:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2023-08-27 13:53:52,664 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:53:52,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:53:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash 908564494, now seen corresponding path program 10 times [2023-08-27 13:53:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:53:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811895638] [2023-08-27 13:53:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:53:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:53:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:53:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:53,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:53:53,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811895638] [2023-08-27 13:53:53,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811895638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:53:53,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981022941] [2023-08-27 13:53:53,324 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:53:53,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:53:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:53:53,325 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:53:53,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-08-27 13:53:53,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:53:53,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:53:53,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 13:53:53,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:53:54,034 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 13:53:54,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:54,068 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 13:53:54,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:53:54,099 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 13:53:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:54,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:53:54,630 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:53:54,630 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 27 treesize of output 28 [2023-08-27 13:53:54,634 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:53:54,635 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 71 treesize of output 65 [2023-08-27 13:53:54,636 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 54 treesize of output 46 [2023-08-27 13:53:54,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-08-27 13:53:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:53:54,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981022941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:53:54,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:53:54,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 55 [2023-08-27 13:53:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880381403] [2023-08-27 13:53:54,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:53:54,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-08-27 13:53:54,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:53:54,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-08-27 13:53:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2980, Unknown=27, NotChecked=0, Total=3192 [2023-08-27 13:53:54,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:53:54,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 1756 transitions, 28550 flow. Second operand has 57 states, 57 states have (on average 82.12280701754386) internal successors, (4681), 57 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:53:54,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:53:54,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:53:54,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:54:01,080 INFO L124 PetriNetUnfolderBase]: 7052/11512 cut-off events. [2023-08-27 13:54:01,080 INFO L125 PetriNetUnfolderBase]: For 255120/255132 co-relation queries the response was YES. [2023-08-27 13:54:01,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100950 conditions, 11512 events. 7052/11512 cut-off events. For 255120/255132 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 72219 event pairs, 2242 based on Foata normal form. 65/11574 useless extension candidates. Maximal degree in co-relation 100786. Up to 7391 conditions per place. [2023-08-27 13:54:01,254 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1742 selfloop transitions, 276 changer transitions 0/2062 dead transitions. [2023-08-27 13:54:01,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 2062 transitions, 39103 flow [2023-08-27 13:54:01,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 13:54:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 13:54:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1825 transitions. [2023-08-27 13:54:01,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218694885361552 [2023-08-27 13:54:01,257 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1825 transitions. [2023-08-27 13:54:01,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1825 transitions. [2023-08-27 13:54:01,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:54:01,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1825 transitions. [2023-08-27 13:54:01,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.9047619047619) internal successors, (1825), 21 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:01,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:01,261 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:01,261 INFO L175 Difference]: Start difference. First operand has 587 places, 1756 transitions, 28550 flow. Second operand 21 states and 1825 transitions. [2023-08-27 13:54:01,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 2062 transitions, 39103 flow [2023-08-27 13:54:03,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 2062 transitions, 37976 flow, removed 3 selfloop flow, removed 12 redundant places. [2023-08-27 13:54:03,357 INFO L231 Difference]: Finished difference. Result has 597 places, 1770 transitions, 28511 flow [2023-08-27 13:54:03,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=27426, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28511, PETRI_PLACES=597, PETRI_TRANSITIONS=1770} [2023-08-27 13:54:03,358 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 558 predicate places. [2023-08-27 13:54:03,359 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1770 transitions, 28511 flow [2023-08-27 13:54:03,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 82.12280701754386) internal successors, (4681), 57 states have internal predecessors, (4681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:03,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:54:03,359 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1] [2023-08-27 13:54:03,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-08-27 13:54:03,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-08-27 13:54:03,566 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:54:03,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:54:03,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1359266527, now seen corresponding path program 7 times [2023-08-27 13:54:03,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:54:03,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778821428] [2023-08-27 13:54:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:54:03,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:54:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:04,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:54:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778821428] [2023-08-27 13:54:04,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778821428] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:54:04,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105558723] [2023-08-27 13:54:04,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:54:04,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:54:04,190 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:54:04,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-08-27 13:54:04,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:04,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 13:54:04,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:54:04,857 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 13:54:05,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:05,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-08-27 13:54:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:05,061 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 13:54:05,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:05,099 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 13:54:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:05,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:54:05,603 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3839 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_3839) c_~A~0.base) (+ c_~A~0.offset 28)) 9223372039002259456))) is different from false [2023-08-27 13:54:05,756 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:54:05,756 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 36 treesize of output 42 [2023-08-27 13:54:05,764 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:05,764 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 159 treesize of output 147 [2023-08-27 13:54:05,768 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 20 [2023-08-27 13:54:05,771 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 29 treesize of output 25 [2023-08-27 13:54:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105558723] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:54:06,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:54:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-08-27 13:54:06,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963334780] [2023-08-27 13:54:06,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:54:06,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-08-27 13:54:06,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:54:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-08-27 13:54:06,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3212, Unknown=18, NotChecked=114, Total=3540 [2023-08-27 13:54:06,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:54:06,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1770 transitions, 28511 flow. Second operand has 60 states, 60 states have (on average 82.08333333333333) internal successors, (4925), 60 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:06,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:54:06,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:54:06,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:54:12,154 INFO L124 PetriNetUnfolderBase]: 7152/11677 cut-off events. [2023-08-27 13:54:12,154 INFO L125 PetriNetUnfolderBase]: For 285466/285592 co-relation queries the response was YES. [2023-08-27 13:54:12,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105077 conditions, 11677 events. 7152/11677 cut-off events. For 285466/285592 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 73717 event pairs, 2161 based on Foata normal form. 146/11746 useless extension candidates. Maximal degree in co-relation 104914. Up to 7158 conditions per place. [2023-08-27 13:54:12,333 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1772 selfloop transitions, 320 changer transitions 0/2130 dead transitions. [2023-08-27 13:54:12,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 2130 transitions, 41236 flow [2023-08-27 13:54:12,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 13:54:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 13:54:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1825 transitions. [2023-08-27 13:54:12,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218694885361552 [2023-08-27 13:54:12,335 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1825 transitions. [2023-08-27 13:54:12,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1825 transitions. [2023-08-27 13:54:12,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:54:12,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1825 transitions. [2023-08-27 13:54:12,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.9047619047619) internal successors, (1825), 21 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:12,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:12,339 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:12,340 INFO L175 Difference]: Start difference. First operand has 597 places, 1770 transitions, 28511 flow. Second operand 21 states and 1825 transitions. [2023-08-27 13:54:12,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 2130 transitions, 41236 flow [2023-08-27 13:54:14,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 2130 transitions, 40072 flow, removed 162 selfloop flow, removed 17 redundant places. [2023-08-27 13:54:14,491 INFO L231 Difference]: Finished difference. Result has 602 places, 1785 transitions, 29186 flow [2023-08-27 13:54:14,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=27950, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=29186, PETRI_PLACES=602, PETRI_TRANSITIONS=1785} [2023-08-27 13:54:14,493 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 563 predicate places. [2023-08-27 13:54:14,493 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 1785 transitions, 29186 flow [2023-08-27 13:54:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 82.08333333333333) internal successors, (4925), 60 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:14,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:54:14,493 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1] [2023-08-27 13:54:14,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-08-27 13:54:14,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:14,700 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:54:14,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:54:14,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1359266528, now seen corresponding path program 7 times [2023-08-27 13:54:14,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:54:14,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080664621] [2023-08-27 13:54:14,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:54:14,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:54:14,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:15,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:54:15,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080664621] [2023-08-27 13:54:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080664621] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:54:15,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33882804] [2023-08-27 13:54:15,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:54:15,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:54:15,371 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:54:15,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-08-27 13:54:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:15,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 13:54:15,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:54:16,143 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 13:54:16,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:16,179 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 21 treesize of output 20 [2023-08-27 13:54:16,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:16,216 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 13:54:16,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:16,248 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 13:54:16,442 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:16,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:54:16,939 INFO L322 Elim1Store]: treesize reduction 21, result has 54.3 percent of original size [2023-08-27 13:54:16,940 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 34 treesize of output 40 [2023-08-27 13:54:16,945 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:16,946 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 141 treesize of output 129 [2023-08-27 13:54:16,948 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2023-08-27 13:54:16,951 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 25 treesize of output 21 [2023-08-27 13:54:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:17,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33882804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:54:17,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:54:17,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 58 [2023-08-27 13:54:17,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210265351] [2023-08-27 13:54:17,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:54:17,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-08-27 13:54:17,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:54:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-08-27 13:54:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3317, Unknown=24, NotChecked=0, Total=3540 [2023-08-27 13:54:17,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 270 [2023-08-27 13:54:17,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 1785 transitions, 29186 flow. Second operand has 60 states, 60 states have (on average 82.08333333333333) internal successors, (4925), 60 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:17,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:54:17,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 270 [2023-08-27 13:54:17,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:54:23,920 INFO L124 PetriNetUnfolderBase]: 7051/11483 cut-off events. [2023-08-27 13:54:23,920 INFO L125 PetriNetUnfolderBase]: For 263527/263653 co-relation queries the response was YES. [2023-08-27 13:54:24,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102760 conditions, 11483 events. 7051/11483 cut-off events. For 263527/263653 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 72391 event pairs, 2150 based on Foata normal form. 146/11554 useless extension candidates. Maximal degree in co-relation 102595. Up to 7158 conditions per place. [2023-08-27 13:54:24,077 INFO L140 encePairwiseOnDemand]: 262/270 looper letters, 1740 selfloop transitions, 321 changer transitions 0/2099 dead transitions. [2023-08-27 13:54:24,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 2099 transitions, 40076 flow [2023-08-27 13:54:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 13:54:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 13:54:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1824 transitions. [2023-08-27 13:54:24,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3216931216931217 [2023-08-27 13:54:24,079 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1824 transitions. [2023-08-27 13:54:24,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1824 transitions. [2023-08-27 13:54:24,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:54:24,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1824 transitions. [2023-08-27 13:54:24,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 86.85714285714286) internal successors, (1824), 21 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:24,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:24,082 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:24,082 INFO L175 Difference]: Start difference. First operand has 602 places, 1785 transitions, 29186 flow. Second operand 21 states and 1824 transitions. [2023-08-27 13:54:24,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 2099 transitions, 40076 flow [2023-08-27 13:54:26,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 2099 transitions, 39330 flow, removed 83 selfloop flow, removed 17 redundant places. [2023-08-27 13:54:26,130 INFO L231 Difference]: Finished difference. Result has 605 places, 1781 transitions, 28916 flow [2023-08-27 13:54:26,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=28274, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28916, PETRI_PLACES=605, PETRI_TRANSITIONS=1781} [2023-08-27 13:54:26,131 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 566 predicate places. [2023-08-27 13:54:26,131 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 1781 transitions, 28916 flow [2023-08-27 13:54:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 82.08333333333333) internal successors, (4925), 60 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:26,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:54:26,132 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2023-08-27 13:54:26,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-08-27 13:54:26,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:26,338 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:54:26,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:54:26,339 INFO L85 PathProgramCache]: Analyzing trace with hash -782483263, now seen corresponding path program 11 times [2023-08-27 13:54:26,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:54:26,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428910106] [2023-08-27 13:54:26,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:54:26,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:54:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:26,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:54:26,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428910106] [2023-08-27 13:54:26,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428910106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:54:26,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717062361] [2023-08-27 13:54:26,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:54:26,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:26,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:54:26,979 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:54:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-08-27 13:54:27,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-27 13:54:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:54:27,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 13:54:27,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:54:27,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 13:54:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:27,764 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 13:54:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:28,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:54:28,368 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3968 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_3968) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ 32 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 4294967296)) is different from false [2023-08-27 13:54:28,372 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:28,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-08-27 13:54:28,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:28,377 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 37 treesize of output 31 [2023-08-27 13:54:28,672 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2023-08-27 13:54:28,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717062361] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:54:28,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:54:28,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 60 [2023-08-27 13:54:28,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997299492] [2023-08-27 13:54:28,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:54:28,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-27 13:54:28,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:54:28,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-27 13:54:28,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3453, Unknown=1, NotChecked=118, Total=3782 [2023-08-27 13:54:28,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:54:28,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 1781 transitions, 28916 flow. Second operand has 62 states, 62 states have (on average 85.06451612903226) internal successors, (5274), 62 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:28,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:54:28,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:54:28,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:54:35,034 INFO L124 PetriNetUnfolderBase]: 7054/11483 cut-off events. [2023-08-27 13:54:35,034 INFO L125 PetriNetUnfolderBase]: For 243897/244038 co-relation queries the response was YES. [2023-08-27 13:54:35,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101892 conditions, 11483 events. 7054/11483 cut-off events. For 243897/244038 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 72148 event pairs, 2886 based on Foata normal form. 122/11519 useless extension candidates. Maximal degree in co-relation 101728. Up to 11119 conditions per place. [2023-08-27 13:54:35,220 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 1715 selfloop transitions, 52 changer transitions 0/1805 dead transitions. [2023-08-27 13:54:35,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 1805 transitions, 33108 flow [2023-08-27 13:54:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 13:54:35,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 13:54:35,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2091 transitions. [2023-08-27 13:54:35,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3226851851851852 [2023-08-27 13:54:35,222 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2091 transitions. [2023-08-27 13:54:35,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2091 transitions. [2023-08-27 13:54:35,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:54:35,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2091 transitions. [2023-08-27 13:54:35,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:35,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:35,227 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:35,227 INFO L175 Difference]: Start difference. First operand has 605 places, 1781 transitions, 28916 flow. Second operand 24 states and 2091 transitions. [2023-08-27 13:54:35,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 1805 transitions, 33108 flow [2023-08-27 13:54:37,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1805 transitions, 32539 flow, removed 0 selfloop flow, removed 18 redundant places. [2023-08-27 13:54:37,501 INFO L231 Difference]: Finished difference. Result has 613 places, 1787 transitions, 28680 flow [2023-08-27 13:54:37,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=28348, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28680, PETRI_PLACES=613, PETRI_TRANSITIONS=1787} [2023-08-27 13:54:37,502 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 574 predicate places. [2023-08-27 13:54:37,502 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 1787 transitions, 28680 flow [2023-08-27 13:54:37,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 85.06451612903226) internal successors, (5274), 62 states have internal predecessors, (5274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:37,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:54:37,502 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 1, 1, 1, 1, 1] [2023-08-27 13:54:37,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-08-27 13:54:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2023-08-27 13:54:37,709 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:54:37,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:54:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash -782483264, now seen corresponding path program 11 times [2023-08-27 13:54:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:54:37,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572139114] [2023-08-27 13:54:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:54:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:54:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:38,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:54:38,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572139114] [2023-08-27 13:54:38,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572139114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:54:38,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401175468] [2023-08-27 13:54:38,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:54:38,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:54:38,400 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:54:38,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-08-27 13:54:38,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-27 13:54:38,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:54:38,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-27 13:54:38,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:54:39,145 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 13:54:39,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:39,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 13:54:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:39,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:54:39,553 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:39,554 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 26 treesize of output 27 [2023-08-27 13:54:39,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:39,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2023-08-27 13:54:39,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-08-27 13:54:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:39,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401175468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:54:39,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:54:39,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2023-08-27 13:54:39,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041023930] [2023-08-27 13:54:39,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:54:39,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-27 13:54:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:54:39,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-27 13:54:39,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2488, Unknown=5, NotChecked=0, Total=2652 [2023-08-27 13:54:39,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 270 [2023-08-27 13:54:39,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 1787 transitions, 28680 flow. Second operand has 52 states, 52 states have (on average 85.0576923076923) internal successors, (4423), 52 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:39,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:54:39,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 270 [2023-08-27 13:54:39,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:54:45,442 INFO L124 PetriNetUnfolderBase]: 7053/11483 cut-off events. [2023-08-27 13:54:45,442 INFO L125 PetriNetUnfolderBase]: For 240931/241072 co-relation queries the response was YES. [2023-08-27 13:54:45,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101121 conditions, 11483 events. 7053/11483 cut-off events. For 240931/241072 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 72294 event pairs, 2897 based on Foata normal form. 122/11523 useless extension candidates. Maximal degree in co-relation 100954. Up to 11161 conditions per place. [2023-08-27 13:54:45,609 INFO L140 encePairwiseOnDemand]: 261/270 looper letters, 1718 selfloop transitions, 50 changer transitions 0/1806 dead transitions. [2023-08-27 13:54:45,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1806 transitions, 32663 flow [2023-08-27 13:54:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 13:54:45,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 13:54:45,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2090 transitions. [2023-08-27 13:54:45,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32253086419753085 [2023-08-27 13:54:45,610 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2090 transitions. [2023-08-27 13:54:45,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2090 transitions. [2023-08-27 13:54:45,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:54:45,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2090 transitions. [2023-08-27 13:54:45,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.08333333333333) internal successors, (2090), 24 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:45,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:45,615 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 270.0) internal successors, (6750), 25 states have internal predecessors, (6750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:45,615 INFO L175 Difference]: Start difference. First operand has 613 places, 1787 transitions, 28680 flow. Second operand 24 states and 2090 transitions. [2023-08-27 13:54:45,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1806 transitions, 32663 flow [2023-08-27 13:54:47,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 616 places, 1806 transitions, 32497 flow, removed 35 selfloop flow, removed 20 redundant places. [2023-08-27 13:54:47,991 INFO L231 Difference]: Finished difference. Result has 616 places, 1785 transitions, 28509 flow [2023-08-27 13:54:47,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=28409, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1735, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28509, PETRI_PLACES=616, PETRI_TRANSITIONS=1785} [2023-08-27 13:54:47,992 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 577 predicate places. [2023-08-27 13:54:47,992 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 1785 transitions, 28509 flow [2023-08-27 13:54:47,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 85.0576923076923) internal successors, (4423), 52 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:47,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:54:47,993 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:54:48,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2023-08-27 13:54:48,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2023-08-27 13:54:48,200 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:54:48,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:54:48,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1899267481, now seen corresponding path program 11 times [2023-08-27 13:54:48,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:54:48,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000645912] [2023-08-27 13:54:48,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:54:48,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:54:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:48,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:48,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:54:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000645912] [2023-08-27 13:54:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000645912] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:54:48,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378715271] [2023-08-27 13:54:48,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:54:48,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:48,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:54:48,467 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:54:48,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-08-27 13:54:49,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-27 13:54:49,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:54:49,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 13:54:49,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:54:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:49,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:54:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378715271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:54:49,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:54:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 47 [2023-08-27 13:54:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297680812] [2023-08-27 13:54:49,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:54:49,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-08-27 13:54:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:54:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-08-27 13:54:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2023-08-27 13:54:49,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 270 [2023-08-27 13:54:49,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 1785 transitions, 28509 flow. Second operand has 49 states, 49 states have (on average 90.12244897959184) internal successors, (4416), 49 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:49,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:54:49,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 270 [2023-08-27 13:54:49,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:54:54,439 INFO L124 PetriNetUnfolderBase]: 7176/11657 cut-off events. [2023-08-27 13:54:54,439 INFO L125 PetriNetUnfolderBase]: For 230735/230747 co-relation queries the response was YES. [2023-08-27 13:54:54,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101441 conditions, 11657 events. 7176/11657 cut-off events. For 230735/230747 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 72701 event pairs, 1054 based on Foata normal form. 89/11743 useless extension candidates. Maximal degree in co-relation 101275. Up to 2563 conditions per place. [2023-08-27 13:54:54,612 INFO L140 encePairwiseOnDemand]: 263/270 looper letters, 1936 selfloop transitions, 566 changer transitions 0/2545 dead transitions. [2023-08-27 13:54:54,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 2545 transitions, 45238 flow [2023-08-27 13:54:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 13:54:54,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 13:54:54,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1976 transitions. [2023-08-27 13:54:54,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3485008818342152 [2023-08-27 13:54:54,614 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1976 transitions. [2023-08-27 13:54:54,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1976 transitions. [2023-08-27 13:54:54,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:54:54,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1976 transitions. [2023-08-27 13:54:54,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 94.0952380952381) internal successors, (1976), 21 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:54,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:54,617 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 270.0) internal successors, (5940), 22 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:54,617 INFO L175 Difference]: Start difference. First operand has 616 places, 1785 transitions, 28509 flow. Second operand 21 states and 1976 transitions. [2023-08-27 13:54:54,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 2545 transitions, 45238 flow [2023-08-27 13:54:56,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 2545 transitions, 44588 flow, removed 283 selfloop flow, removed 21 redundant places. [2023-08-27 13:54:56,905 INFO L231 Difference]: Finished difference. Result has 617 places, 1753 transitions, 28745 flow [2023-08-27 13:54:56,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=27507, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=563, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=28745, PETRI_PLACES=617, PETRI_TRANSITIONS=1753} [2023-08-27 13:54:56,905 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 578 predicate places. [2023-08-27 13:54:56,905 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1753 transitions, 28745 flow [2023-08-27 13:54:56,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 90.12244897959184) internal successors, (4416), 49 states have internal predecessors, (4416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:54:56,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:54:56,906 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:54:56,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2023-08-27 13:54:57,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2023-08-27 13:54:57,113 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:54:57,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:54:57,113 INFO L85 PathProgramCache]: Analyzing trace with hash -583697515, now seen corresponding path program 26 times [2023-08-27 13:54:57,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:54:57,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152383812] [2023-08-27 13:54:57,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:54:57,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:54:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:54:58,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:58,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:54:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152383812] [2023-08-27 13:54:58,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152383812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:54:58,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385009896] [2023-08-27 13:54:58,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:54:58,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:54:58,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:54:58,022 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:54:58,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-08-27 13:54:58,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:54:58,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:54:58,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 74 conjunts are in the unsatisfiable core [2023-08-27 13:54:58,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:54:59,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:59,006 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2023-08-27 13:54:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:54:59,252 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:54:59,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 145 treesize of output 117 [2023-08-27 13:54:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:54:59,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:55:00,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:00,331 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 340 treesize of output 330 [2023-08-27 13:55:00,391 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:00,391 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 65 treesize of output 53 [2023-08-27 13:55:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:55:02,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385009896] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:55:02,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:55:02,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-08-27 13:55:02,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298303989] [2023-08-27 13:55:02,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:55:02,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 13:55:02,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:55:02,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 13:55:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1819, Unknown=3, NotChecked=0, Total=1980 [2023-08-27 13:55:02,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 270 [2023-08-27 13:55:02,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1753 transitions, 28745 flow. Second operand has 45 states, 45 states have (on average 70.35555555555555) internal successors, (3166), 45 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:55:02,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:55:02,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 270 [2023-08-27 13:55:02,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:55:10,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 13:55:12,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 13:55:14,570 WARN L539 Checker$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 13:55:15,820 INFO L124 PetriNetUnfolderBase]: 7438/12154 cut-off events. [2023-08-27 13:55:15,820 INFO L125 PetriNetUnfolderBase]: For 241863/241863 co-relation queries the response was YES. [2023-08-27 13:55:15,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108574 conditions, 12154 events. 7438/12154 cut-off events. For 241863/241863 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 77704 event pairs, 1088 based on Foata normal form. 7/12161 useless extension candidates. Maximal degree in co-relation 108406. Up to 10231 conditions per place. [2023-08-27 13:55:16,002 INFO L140 encePairwiseOnDemand]: 256/270 looper letters, 1258 selfloop transitions, 646 changer transitions 39/1943 dead transitions. [2023-08-27 13:55:16,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 659 places, 1943 transitions, 35318 flow [2023-08-27 13:55:16,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 13:55:16,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 13:55:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3164 transitions. [2023-08-27 13:55:16,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27252368647717484 [2023-08-27 13:55:16,005 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3164 transitions. [2023-08-27 13:55:16,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3164 transitions. [2023-08-27 13:55:16,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:55:16,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3164 transitions. [2023-08-27 13:55:16,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 73.5813953488372) internal successors, (3164), 43 states have internal predecessors, (3164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:55:16,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 270.0) internal successors, (11880), 44 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:55:16,012 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 270.0) internal successors, (11880), 44 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:55:16,012 INFO L175 Difference]: Start difference. First operand has 617 places, 1753 transitions, 28745 flow. Second operand 43 states and 3164 transitions. [2023-08-27 13:55:16,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 659 places, 1943 transitions, 35318 flow [2023-08-27 13:55:18,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 1943 transitions, 33984 flow, removed 55 selfloop flow, removed 18 redundant places. [2023-08-27 13:55:18,780 INFO L231 Difference]: Finished difference. Result has 649 places, 1818 transitions, 30738 flow [2023-08-27 13:55:18,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=27513, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=583, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=30738, PETRI_PLACES=649, PETRI_TRANSITIONS=1818} [2023-08-27 13:55:18,781 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 610 predicate places. [2023-08-27 13:55:18,781 INFO L495 AbstractCegarLoop]: Abstraction has has 649 places, 1818 transitions, 30738 flow [2023-08-27 13:55:18,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 70.35555555555555) internal successors, (3166), 45 states have internal predecessors, (3166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:55:18,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:55:18,782 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:55:18,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-08-27 13:55:18,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:55:18,989 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 34 more)] === [2023-08-27 13:55:18,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:55:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash -972229867, now seen corresponding path program 27 times [2023-08-27 13:55:18,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:55:18,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102382038] [2023-08-27 13:55:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:55:18,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:55:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:55:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:55:20,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:55:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102382038] [2023-08-27 13:55:20,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102382038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:55:20,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511200661] [2023-08-27 13:55:20,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:55:20,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:55:20,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:55:20,255 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 13:55:20,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-08-27 13:55:20,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:55:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:55:20,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-27 13:55:20,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:55:21,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 13:55:21,177 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 38 treesize of output 34 [2023-08-27 13:55:21,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:21,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 172 [2023-08-27 13:55:22,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:55:22,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:55:25,756 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))) (.cse5 (+ c_~A~0.offset 4))) (and (or (< .cse0 0) (and (forall ((v_ArrVal_4165 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4165) c_~A~0.base))) (let ((.cse2 (select .cse4 c_~A~0.offset)) (.cse1 (select .cse4 .cse5))) (or (< 9223372039002259455 .cse1) (< 9223372039002259455 .cse2) (forall ((v_subst_12 Int)) (let ((.cse3 (select .cse4 (+ c_~A~0.offset (* v_subst_12 4))))) (or (<= c_~N~0 v_subst_12) (<= 0 .cse3) (< (+ 9223372039002259455 .cse3) 0) (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_412| Int)) (or (= (+ .cse2 (select .cse4 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_412| 4))) .cse1) (+ .cse0 .cse3 c_~counter~0)) (< (+ |v_thread2Thread1of1ForFork0_~i~1#1_412| 1) c_~N~0) (<= c_~N~0 |v_thread2Thread1of1ForFork0_~i~1#1_412|))) (< (+ v_subst_12 1) c_~N~0)))))))) (forall ((v_ArrVal_4165 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4165) c_~A~0.base))) (let ((.cse7 (select .cse10 c_~A~0.offset)) (.cse6 (select .cse10 .cse5))) (or (< 9223372039002259455 .cse6) (< 9223372039002259455 .cse7) (forall ((v_subst_11 Int)) (let ((.cse9 (select .cse10 (+ c_~A~0.offset (* v_subst_11 4))))) (or (<= c_~N~0 v_subst_11) (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_412| Int)) (let ((.cse8 (select .cse10 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_412| 4))))) (or (< 9223372039002259455 .cse8) (= (+ .cse7 .cse8 .cse6) (+ .cse0 c_~counter~0 .cse9)) (< (+ |v_thread2Thread1of1ForFork0_~i~1#1_412| 1) c_~N~0) (<= c_~N~0 |v_thread2Thread1of1ForFork0_~i~1#1_412|)))) (< (+ v_subst_11 1) c_~N~0) (< .cse9 0)))))))))) (or (< (+ .cse0 9223372039002259455) 0) (<= 0 .cse0) (and (forall ((v_ArrVal_4165 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4165) c_~A~0.base))) (let ((.cse12 (select .cse15 c_~A~0.offset)) (.cse11 (select .cse15 .cse5))) (or (< 9223372039002259455 .cse11) (< 9223372039002259455 .cse12) (forall ((v_subst_9 Int)) (let ((.cse13 (select .cse15 (+ c_~A~0.offset (* 4 v_subst_9))))) (or (< .cse13 0) (< (+ v_subst_9 1) c_~N~0) (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_412| Int)) (let ((.cse14 (select .cse15 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_412| 4))))) (or (< 9223372039002259455 .cse14) (< (+ |v_thread2Thread1of1ForFork0_~i~1#1_412| 1) c_~N~0) (<= c_~N~0 |v_thread2Thread1of1ForFork0_~i~1#1_412|) (= (+ .cse0 c_~counter~0 .cse13) (+ .cse12 .cse14 .cse11))))) (<= c_~N~0 v_subst_9)))))))) (forall ((v_ArrVal_4165 (Array Int Int))) (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_4165) c_~A~0.base))) (let ((.cse17 (select .cse18 c_~A~0.offset)) (.cse16 (select .cse18 .cse5))) (or (< 9223372039002259455 .cse16) (< 9223372039002259455 .cse17) (forall ((v_subst_10 Int)) (let ((.cse19 (select .cse18 (+ c_~A~0.offset (* v_subst_10 4))))) (or (< (+ v_subst_10 1) c_~N~0) (forall ((|v_thread2Thread1of1ForFork0_~i~1#1_412| Int)) (or (< (+ |v_thread2Thread1of1ForFork0_~i~1#1_412| 1) c_~N~0) (<= c_~N~0 |v_thread2Thread1of1ForFork0_~i~1#1_412|) (= (+ .cse17 (select .cse18 (+ c_~A~0.offset (* |v_thread2Thread1of1ForFork0_~i~1#1_412| 4))) .cse16) (+ .cse19 .cse0 c_~counter~0)))) (< (+ .cse19 9223372039002259455) 0) (<= 0 .cse19) (<= c_~N~0 v_subst_10)))))))))))) is different from false [2023-08-27 13:55:26,547 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:26,548 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 1023 treesize of output 1230 [2023-08-27 13:55:26,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:26,706 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 584 treesize of output 589 [2023-08-27 13:55:26,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:26,925 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 548 treesize of output 553 [2023-08-27 13:55:27,064 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:27,065 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 512 treesize of output 517 [2023-08-27 13:55:27,225 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 13:55:27,226 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 476 treesize of output 481 [2023-08-27 13:55:39,288 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:39,589 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:39,935 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:41,210 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:41,613 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:41,903 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:42,161 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-27 13:55:42,676 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:43,770 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:44,171 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:44,354 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:44,849 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:45,160 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-27 13:55:46,374 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-27 13:55:47,026 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:47,545 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-27 13:55:47,898 WARN L667 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2023-08-27 13:55:48,549 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:48,662 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:49,489 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:49,748 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:50,159 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:50,637 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:52,231 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:52,480 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:52,778 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:53,551 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:53,862 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:54,298 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:54,653 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-27 13:55:55,037 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:56,087 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:56,613 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:55:56,951 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:58,334 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:55:59,406 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:02,041 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:02,377 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:56:02,657 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:03,855 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:05,252 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:56:05,601 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:06,104 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:07,002 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:07,495 WARN L667 sPolynomialRelations]: Constructing 256(two to the power of 8 dual juncts. [2023-08-27 13:56:07,966 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:56:08,290 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:56:08,849 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:56:09,925 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 13:56:45,777 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:57:20,641 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:57:24,246 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:57:53,148 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:58:18,385 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 13:59:22,422 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. Received shutdown request... [2023-08-27 13:59:41,527 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 13:59:41,535 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-27 13:59:41,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (36 of 37 remaining) [2023-08-27 13:59:41,539 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 13:59:41,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2023-08-27 13:59:41,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:59:41,744 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. [2023-08-27 13:59:41,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (35 of 37 remaining) [2023-08-27 13:59:41,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (34 of 37 remaining) [2023-08-27 13:59:41,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (33 of 37 remaining) [2023-08-27 13:59:41,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (32 of 37 remaining) [2023-08-27 13:59:41,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (31 of 37 remaining) [2023-08-27 13:59:41,750 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (30 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 37 remaining) [2023-08-27 13:59:41,751 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (17 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (16 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 37 remaining) [2023-08-27 13:59:41,752 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 37 remaining) [2023-08-27 13:59:41,753 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 37 remaining) [2023-08-27 13:59:41,753 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 37 remaining) [2023-08-27 13:59:41,753 INFO L445 BasicCegarLoop]: Path program histogram: [27, 11, 11, 11, 9, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:59:41,775 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 13:59:41,776 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 13:59:41,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 01:59:41 BasicIcfg [2023-08-27 13:59:41,778 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 13:59:41,778 INFO L158 Benchmark]: Toolchain (without parser) took 833646.30ms. Allocated memory was 343.9MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 319.9MB in the beginning and 4.3GB in the end (delta: -3.9GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-27 13:59:41,778 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory was 320.1MB in the beginning and 320.0MB in the end (delta: 90.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 13:59:41,778 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.32ms. Allocated memory is still 343.9MB. Free memory was 319.9MB in the beginning and 307.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 13:59:41,778 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.17ms. Allocated memory is still 343.9MB. Free memory was 307.3MB in the beginning and 305.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 13:59:41,778 INFO L158 Benchmark]: Boogie Preprocessor took 35.65ms. Allocated memory is still 343.9MB. Free memory was 305.2MB in the beginning and 303.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 13:59:41,778 INFO L158 Benchmark]: RCFGBuilder took 670.35ms. Allocated memory is still 343.9MB. Free memory was 303.4MB in the beginning and 313.9MB in the end (delta: -10.5MB). Peak memory consumption was 50.1MB. Max. memory is 16.0GB. [2023-08-27 13:59:41,778 INFO L158 Benchmark]: TraceAbstraction took 832698.58ms. Allocated memory was 343.9MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 312.9MB in the beginning and 4.3GB in the end (delta: -3.9GB). Peak memory consumption was 5.5GB. Max. memory is 16.0GB. [2023-08-27 13:59:41,783 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 343.9MB. Free memory was 320.1MB in the beginning and 320.0MB in the end (delta: 90.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 197.32ms. Allocated memory is still 343.9MB. Free memory was 319.9MB in the beginning and 307.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.17ms. Allocated memory is still 343.9MB. Free memory was 307.3MB in the beginning and 305.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 35.65ms. Allocated memory is still 343.9MB. Free memory was 305.2MB in the beginning and 303.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 670.35ms. Allocated memory is still 343.9MB. Free memory was 303.4MB in the beginning and 313.9MB in the end (delta: -10.5MB). Peak memory consumption was 50.1MB. Max. memory is 16.0GB. * TraceAbstraction took 832698.58ms. Allocated memory was 343.9MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 312.9MB in the beginning and 4.3GB in the end (delta: -3.9GB). Peak memory consumption was 5.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.8s, 124 PlacesBefore, 39 PlacesAfterwards, 126 TransitionsBefore, 35 TransitionsAfterwards, 1512 CoEnabledTransitionPairs, 7 FixpointIterations, 64 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 133 TotalNumberOfCompositions, 2087 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1909, independent: 1894, independent conditional: 0, independent unconditional: 1894, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 806, independent: 797, independent conditional: 0, independent unconditional: 797, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1909, independent: 1097, independent conditional: 0, independent unconditional: 1097, dependent: 6, dependent conditional: 0, dependent unconditional: 6, unknown: 806, unknown conditional: 0, unknown unconditional: 806] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 70, Positive conditional cache size: 0, Positive unconditional cache size: 70, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 106]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 106]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 42ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 171 locations, 37 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: 832.5s, OverallIterations: 106, TraceHistogramMax: 9, PathProgramHistogramMax: 27, EmptinessCheckTime: 0.0s, AutomataDifference: 412.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.9s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 14454 SdHoareTripleChecker+Valid, 62.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14454 mSDsluCounter, 2421 SdHoareTripleChecker+Invalid, 55.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2497 IncrementalHoareTripleChecker+Unchecked, 2180 mSDsCounter, 1453 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101867 IncrementalHoareTripleChecker+Invalid, 105830 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1453 mSolverCounterUnsat, 241 mSDtfsCounter, 101867 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4669 GetRequests, 985 SyntacticMatches, 114 SemanticMatches, 3570 ConstructedPredicates, 26 IntricatePredicates, 0 DeprecatedPredicates, 42543 ImplicationChecksByTransitivity, 152.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37064occurred in iteration=93, InterpolantAutomatonStates: 1681, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 99.7s InterpolantComputationTime, 2996 NumberOfCodeBlocks, 2982 NumberOfCodeBlocksAsserted, 325 NumberOfCheckSat, 4140 ConstructedInterpolants, 287 QuantifiedInterpolants, 58349 SizeOfPredicates, 1035 NumberOfNonLiveVariables, 20824 ConjunctsInSsa, 3177 ConjunctsInUnsatCore, 293 InterpolantComputations, 14 PerfectInterpolantSequences, 867/5920 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