/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:42:52,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:42:52,253 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 08:42:52,257 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:42:52,257 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:42:52,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:42:52,278 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:42:52,278 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:42:52,279 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:42:52,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:42:52,279 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:42:52,280 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:42:52,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:42:52,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:42:52,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:42:52,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:42:52,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:42:52,282 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:42:52,282 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:42:52,282 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:42:52,283 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:42:52,283 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:42:52,283 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:42:52,284 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:42:52,284 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:42:52,284 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:42:52,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:42:52,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:42:52,285 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:42:52,286 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:42:52,286 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:42:52,286 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:42:52,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:42:52,287 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:42:52,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:42:52,288 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:42:52,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:42:52,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:42:52,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:42:52,641 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:42:52,641 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:42:52,646 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-27 08:42:53,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:42:54,180 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:42:54,180 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-two-queue.wvr.c [2023-08-27 08:42:54,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c5b51fc/574b7afbf29942cf96303bcf641104fa/FLAG52d30dbee [2023-08-27 08:42:54,211 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c5b51fc/574b7afbf29942cf96303bcf641104fa [2023-08-27 08:42:54,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:42:54,216 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:42:54,218 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:42:54,218 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:42:54,221 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:42:54,222 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49aaced5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54, skipping insertion in model container [2023-08-27 08:42:54,223 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,250 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:42:54,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:42:54,455 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:42:54,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:42:54,500 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:42:54,500 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:42:54,509 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:42:54,511 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54 WrapperNode [2023-08-27 08:42:54,511 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:42:54,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:42:54,512 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:42:54,512 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:42:54,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,571 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 227 [2023-08-27 08:42:54,572 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:42:54,573 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:42:54,573 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:42:54,573 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:42:54,580 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,595 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,595 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,605 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,608 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,609 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,610 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,625 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:42:54,626 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:42:54,626 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:42:54,626 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:42:54,627 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (1/1) ... [2023-08-27 08:42:54,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:42:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:42:54,655 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 08:42:54,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 08:42:54,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:42:54,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:42:54,691 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:42:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:42:54,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:42:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:42:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:42:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:42:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:42:54,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:42:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:42:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:42:54,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:42:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:42:54,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:42:54,694 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 08:42:54,789 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:42:54,790 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:42:55,193 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:42:55,335 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:42:55,335 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 08:42:55,337 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:42:55 BoogieIcfgContainer [2023-08-27 08:42:55,337 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:42:55,339 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:42:55,339 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:42:55,342 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:42:55,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:42:54" (1/3) ... [2023-08-27 08:42:55,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a90a303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:42:55, skipping insertion in model container [2023-08-27 08:42:55,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:42:54" (2/3) ... [2023-08-27 08:42:55,343 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a90a303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:42:55, skipping insertion in model container [2023-08-27 08:42:55,343 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:42:55" (3/3) ... [2023-08-27 08:42:55,344 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2023-08-27 08:42:55,359 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:42:55,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-27 08:42:55,359 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:42:55,429 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:42:55,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 197 transitions, 410 flow [2023-08-27 08:42:55,528 INFO L124 PetriNetUnfolderBase]: 13/195 cut-off events. [2023-08-27 08:42:55,529 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:42:55,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 195 events. 13/195 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 164 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-27 08:42:55,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 191 places, 197 transitions, 410 flow [2023-08-27 08:42:55,538 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 180 places, 186 transitions, 384 flow [2023-08-27 08:42:55,541 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:42:55,549 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 186 transitions, 384 flow [2023-08-27 08:42:55,551 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 186 transitions, 384 flow [2023-08-27 08:42:55,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 186 transitions, 384 flow [2023-08-27 08:42:55,588 INFO L124 PetriNetUnfolderBase]: 13/186 cut-off events. [2023-08-27 08:42:55,588 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:42:55,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 186 events. 13/186 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 153. Up to 2 conditions per place. [2023-08-27 08:42:55,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-27 08:43:02,285 INFO L134 LiptonReduction]: Checked pairs total: 3556 [2023-08-27 08:43:02,286 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-08-27 08:43:02,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:43:02,302 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;@639fae82, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:43:02,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-27 08:43:02,305 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:43:02,305 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:43:02,305 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:43:02,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:02,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:43:02,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:02,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:02,310 INFO L85 PathProgramCache]: Analyzing trace with hash 28090, now seen corresponding path program 1 times [2023-08-27 08:43:02,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:02,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499599391] [2023-08-27 08:43:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:02,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:02,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:02,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499599391] [2023-08-27 08:43:02,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499599391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:02,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:43:02,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:43:02,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767321335] [2023-08-27 08:43:02,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:02,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:02,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:02,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:43:02,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 392 [2023-08-27 08:43:02,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:02,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:02,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 392 [2023-08-27 08:43:02,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:02,723 INFO L124 PetriNetUnfolderBase]: 180/317 cut-off events. [2023-08-27 08:43:02,724 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-27 08:43:02,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662 conditions, 317 events. 180/317 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1180 event pairs, 144 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 560. Up to 315 conditions per place. [2023-08-27 08:43:02,730 INFO L140 encePairwiseOnDemand]: 379/392 looper letters, 30 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2023-08-27 08:43:02,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 35 transitions, 152 flow [2023-08-27 08:43:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 508 transitions. [2023-08-27 08:43:02,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2023-08-27 08:43:02,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 508 transitions. [2023-08-27 08:43:02,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 508 transitions. [2023-08-27 08:43:02,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:02,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 508 transitions. [2023-08-27 08:43:02,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:02,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:02,758 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:02,759 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 82 flow. Second operand 3 states and 508 transitions. [2023-08-27 08:43:02,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 35 transitions, 152 flow [2023-08-27 08:43:02,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 144 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 08:43:02,765 INFO L231 Difference]: Finished difference. Result has 34 places, 35 transitions, 110 flow [2023-08-27 08:43:02,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=34, PETRI_TRANSITIONS=35} [2023-08-27 08:43:02,769 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2023-08-27 08:43:02,769 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 35 transitions, 110 flow [2023-08-27 08:43:02,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:02,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:02,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:43:02,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:43:02,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:02,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:02,771 INFO L85 PathProgramCache]: Analyzing trace with hash 872282, now seen corresponding path program 1 times [2023-08-27 08:43:02,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:02,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598326272] [2023-08-27 08:43:02,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:02,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:02,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:02,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598326272] [2023-08-27 08:43:02,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598326272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:02,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730032420] [2023-08-27 08:43:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:02,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:02,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:02,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:02,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 08:43:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:03,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:43:03,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:03,042 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 08:43:03,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:03,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730032420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:03,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:03,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 08:43:03,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921734651] [2023-08-27 08:43:03,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:03,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:03,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:03,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:43:03,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 392 [2023-08-27 08:43:03,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 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 08:43:03,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:03,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 392 [2023-08-27 08:43:03,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:03,176 INFO L124 PetriNetUnfolderBase]: 180/315 cut-off events. [2023-08-27 08:43:03,176 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:43:03,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658 conditions, 315 events. 180/315 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1157 event pairs, 144 based on Foata normal form. 0/151 useless extension candidates. Maximal degree in co-relation 616. Up to 307 conditions per place. [2023-08-27 08:43:03,181 INFO L140 encePairwiseOnDemand]: 385/392 looper letters, 27 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2023-08-27 08:43:03,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 33 transitions, 168 flow [2023-08-27 08:43:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 655 transitions. [2023-08-27 08:43:03,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4177295918367347 [2023-08-27 08:43:03,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 655 transitions. [2023-08-27 08:43:03,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 655 transitions. [2023-08-27 08:43:03,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:03,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 655 transitions. [2023-08-27 08:43:03,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.75) internal successors, (655), 4 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,200 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,201 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 110 flow. Second operand 4 states and 655 transitions. [2023-08-27 08:43:03,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 33 transitions, 168 flow [2023-08-27 08:43:03,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:43:03,206 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 104 flow [2023-08-27 08:43:03,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-08-27 08:43:03,207 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-27 08:43:03,207 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 104 flow [2023-08-27 08:43:03,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 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 08:43:03,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:03,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:43:03,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:03,414 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 08:43:03,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:03,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:03,415 INFO L85 PathProgramCache]: Analyzing trace with hash 872303, now seen corresponding path program 1 times [2023-08-27 08:43:03,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:03,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385463223] [2023-08-27 08:43:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:03,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:03,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385463223] [2023-08-27 08:43:03,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385463223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:03,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071556603] [2023-08-27 08:43:03,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:03,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:03,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:03,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:03,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 08:43:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:03,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:43:03,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:03,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071556603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:03,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:43:03,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782884153] [2023-08-27 08:43:03,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:03,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:43:03,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:03,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:43:03,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:43:03,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 392 [2023-08-27 08:43:03,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 156.14285714285714) internal successors, (1093), 7 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:03,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 392 [2023-08-27 08:43:03,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:03,719 INFO L124 PetriNetUnfolderBase]: 186/327 cut-off events. [2023-08-27 08:43:03,720 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:43:03,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 327 events. 186/327 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1199 event pairs, 144 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 616. Up to 316 conditions per place. [2023-08-27 08:43:03,722 INFO L140 encePairwiseOnDemand]: 385/392 looper letters, 28 selfloop transitions, 17 changer transitions 0/45 dead transitions. [2023-08-27 08:43:03,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 45 transitions, 254 flow [2023-08-27 08:43:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:43:03,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:43:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 981 transitions. [2023-08-27 08:43:03,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41709183673469385 [2023-08-27 08:43:03,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 981 transitions. [2023-08-27 08:43:03,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 981 transitions. [2023-08-27 08:43:03,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:03,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 981 transitions. [2023-08-27 08:43:03,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.5) internal successors, (981), 6 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,734 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,736 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 104 flow. Second operand 6 states and 981 transitions. [2023-08-27 08:43:03,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 45 transitions, 254 flow [2023-08-27 08:43:03,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:43:03,739 INFO L231 Difference]: Finished difference. Result has 39 places, 45 transitions, 220 flow [2023-08-27 08:43:03,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=39, PETRI_TRANSITIONS=45} [2023-08-27 08:43:03,741 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-27 08:43:03,741 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 45 transitions, 220 flow [2023-08-27 08:43:03,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 156.14285714285714) internal successors, (1093), 7 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:03,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:03,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 08:43:03,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:03,949 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 08:43:03,949 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:03,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash 838872999, now seen corresponding path program 1 times [2023-08-27 08:43:03,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:03,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244171611] [2023-08-27 08:43:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:03,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:04,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:04,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244171611] [2023-08-27 08:43:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244171611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:04,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:43:04,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 08:43:04,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650839527] [2023-08-27 08:43:04,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:04,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:04,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:04,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:43:04,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 392 [2023-08-27 08:43:04,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 45 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:04,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 392 [2023-08-27 08:43:04,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:04,194 INFO L124 PetriNetUnfolderBase]: 206/378 cut-off events. [2023-08-27 08:43:04,195 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 08:43:04,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 837 conditions, 378 events. 206/378 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1508 event pairs, 165 based on Foata normal form. 6/212 useless extension candidates. Maximal degree in co-relation 772. Up to 322 conditions per place. [2023-08-27 08:43:04,197 INFO L140 encePairwiseOnDemand]: 383/392 looper letters, 49 selfloop transitions, 7 changer transitions 1/57 dead transitions. [2023-08-27 08:43:04,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 362 flow [2023-08-27 08:43:04,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 625 transitions. [2023-08-27 08:43:04,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985969387755102 [2023-08-27 08:43:04,201 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 625 transitions. [2023-08-27 08:43:04,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 625 transitions. [2023-08-27 08:43:04,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:04,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 625 transitions. [2023-08-27 08:43:04,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,206 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,207 INFO L175 Difference]: Start difference. First operand has 39 places, 45 transitions, 220 flow. Second operand 4 states and 625 transitions. [2023-08-27 08:43:04,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 362 flow [2023-08-27 08:43:04,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 336 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:04,214 INFO L231 Difference]: Finished difference. Result has 42 places, 45 transitions, 221 flow [2023-08-27 08:43:04,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=42, PETRI_TRANSITIONS=45} [2023-08-27 08:43:04,218 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-27 08:43:04,219 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 45 transitions, 221 flow [2023-08-27 08:43:04,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:04,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:43:04,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 08:43:04,221 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:04,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash 235791039, now seen corresponding path program 1 times [2023-08-27 08:43:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:04,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877092925] [2023-08-27 08:43:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:04,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:04,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877092925] [2023-08-27 08:43:04,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877092925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161045998] [2023-08-27 08:43:04,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:04,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:04,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:04,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:04,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 08:43:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:04,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:43:04,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:04,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:04,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161045998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:04,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:04,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 08:43:04,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947830271] [2023-08-27 08:43:04,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:04,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:04,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:04,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:04,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:43:04,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 392 [2023-08-27 08:43:04,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 45 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 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 08:43:04,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:04,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 392 [2023-08-27 08:43:04,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:04,488 INFO L124 PetriNetUnfolderBase]: 163/305 cut-off events. [2023-08-27 08:43:04,489 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-27 08:43:04,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 741 conditions, 305 events. 163/305 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1166 event pairs, 126 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 679. Up to 305 conditions per place. [2023-08-27 08:43:04,491 INFO L140 encePairwiseOnDemand]: 389/392 looper letters, 42 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-27 08:43:04,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 43 transitions, 299 flow [2023-08-27 08:43:04,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 533 transitions. [2023-08-27 08:43:04,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4532312925170068 [2023-08-27 08:43:04,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 533 transitions. [2023-08-27 08:43:04,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 533 transitions. [2023-08-27 08:43:04,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:04,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 533 transitions. [2023-08-27 08:43:04,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,497 INFO L175 Difference]: Start difference. First operand has 42 places, 45 transitions, 221 flow. Second operand 3 states and 533 transitions. [2023-08-27 08:43:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 43 transitions, 299 flow [2023-08-27 08:43:04,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 291 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:04,500 INFO L231 Difference]: Finished difference. Result has 41 places, 43 transitions, 207 flow [2023-08-27 08:43:04,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=207, PETRI_PLACES=41, PETRI_TRANSITIONS=43} [2023-08-27 08:43:04,500 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-27 08:43:04,500 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 43 transitions, 207 flow [2023-08-27 08:43:04,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.0) internal successors, (510), 3 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 08:43:04,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:04,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:43:04,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:04,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:04,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:04,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:04,707 INFO L85 PathProgramCache]: Analyzing trace with hash 217830863, now seen corresponding path program 2 times [2023-08-27 08:43:04,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:04,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236082109] [2023-08-27 08:43:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:04,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:04,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:04,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236082109] [2023-08-27 08:43:04,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236082109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:04,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873273056] [2023-08-27 08:43:04,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:43:04,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:04,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:04,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:04,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 08:43:04,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:43:04,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:04,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:43:04,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:43:04,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:04,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873273056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:04,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:04,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:43:04,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567318405] [2023-08-27 08:43:04,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:04,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:04,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:04,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:43:04,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 392 [2023-08-27 08:43:04,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 43 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:04,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 392 [2023-08-27 08:43:04,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:04,946 INFO L124 PetriNetUnfolderBase]: 163/304 cut-off events. [2023-08-27 08:43:04,946 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-27 08:43:04,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 734 conditions, 304 events. 163/304 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1149 event pairs, 126 based on Foata normal form. 1/195 useless extension candidates. Maximal degree in co-relation 721. Up to 299 conditions per place. [2023-08-27 08:43:04,948 INFO L140 encePairwiseOnDemand]: 389/392 looper letters, 36 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2023-08-27 08:43:04,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 42 transitions, 281 flow [2023-08-27 08:43:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:04,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:04,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-08-27 08:43:04,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42346938775510207 [2023-08-27 08:43:04,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-08-27 08:43:04,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-08-27 08:43:04,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:04,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-08-27 08:43:04,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,954 INFO L175 Difference]: Start difference. First operand has 41 places, 43 transitions, 207 flow. Second operand 3 states and 498 transitions. [2023-08-27 08:43:04,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 42 transitions, 281 flow [2023-08-27 08:43:04,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:04,956 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 208 flow [2023-08-27 08:43:04,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-08-27 08:43:04,957 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-27 08:43:04,957 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 208 flow [2023-08-27 08:43:04,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:04,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:04,957 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 08:43:04,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:05,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:05,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1279862859, now seen corresponding path program 1 times [2023-08-27 08:43:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040559729] [2023-08-27 08:43:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:05,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:05,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040559729] [2023-08-27 08:43:05,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040559729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:05,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047614410] [2023-08-27 08:43:05,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:05,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:05,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:05,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:05,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 08:43:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:05,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 08:43:05,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:05,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:05,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:05,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047614410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:05,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:05,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:43:05,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320646827] [2023-08-27 08:43:05,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:05,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:43:05,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:43:05,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:43:05,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 392 [2023-08-27 08:43:05,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 208 flow. Second operand has 13 states, 13 states have (on average 156.15384615384616) internal successors, (2030), 13 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:05,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 392 [2023-08-27 08:43:05,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:05,537 INFO L124 PetriNetUnfolderBase]: 175/328 cut-off events. [2023-08-27 08:43:05,538 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-27 08:43:05,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 328 events. 175/328 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1277 event pairs, 126 based on Foata normal form. 6/224 useless extension candidates. Maximal degree in co-relation 828. Up to 299 conditions per place. [2023-08-27 08:43:05,540 INFO L140 encePairwiseOnDemand]: 386/392 looper letters, 25 selfloop transitions, 41 changer transitions 0/66 dead transitions. [2023-08-27 08:43:05,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 508 flow [2023-08-27 08:43:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:43:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:43:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1932 transitions. [2023-08-27 08:43:05,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2023-08-27 08:43:05,546 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1932 transitions. [2023-08-27 08:43:05,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1932 transitions. [2023-08-27 08:43:05,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:05,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1932 transitions. [2023-08-27 08:43:05,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 161.0) internal successors, (1932), 12 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 392.0) internal successors, (5096), 13 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,559 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 392.0) internal successors, (5096), 13 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,559 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 208 flow. Second operand 12 states and 1932 transitions. [2023-08-27 08:43:05,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 508 flow [2023-08-27 08:43:05,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:43:05,563 INFO L231 Difference]: Finished difference. Result has 56 places, 66 transitions, 488 flow [2023-08-27 08:43:05,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=488, PETRI_PLACES=56, PETRI_TRANSITIONS=66} [2023-08-27 08:43:05,564 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2023-08-27 08:43:05,565 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 66 transitions, 488 flow [2023-08-27 08:43:05,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 156.15384615384616) internal successors, (2030), 13 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:05,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:05,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:05,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:05,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:05,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1280411729, now seen corresponding path program 1 times [2023-08-27 08:43:05,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:05,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840206678] [2023-08-27 08:43:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840206678] [2023-08-27 08:43:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840206678] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:43:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:43:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457291066] [2023-08-27 08:43:05,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:43:05,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 392 [2023-08-27 08:43:05,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 66 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:05,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 392 [2023-08-27 08:43:05,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:05,970 INFO L124 PetriNetUnfolderBase]: 194/367 cut-off events. [2023-08-27 08:43:05,970 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-27 08:43:05,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 991 conditions, 367 events. 194/367 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1493 event pairs, 69 based on Foata normal form. 8/255 useless extension candidates. Maximal degree in co-relation 971. Up to 227 conditions per place. [2023-08-27 08:43:05,972 INFO L140 encePairwiseOnDemand]: 386/392 looper letters, 74 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-27 08:43:05,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 664 flow [2023-08-27 08:43:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:05,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-08-27 08:43:05,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46003401360544216 [2023-08-27 08:43:05,975 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-08-27 08:43:05,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-08-27 08:43:05,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:05,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-08-27 08:43:05,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,978 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,979 INFO L175 Difference]: Start difference. First operand has 56 places, 66 transitions, 488 flow. Second operand 3 states and 541 transitions. [2023-08-27 08:43:05,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 664 flow [2023-08-27 08:43:05,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 540 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-27 08:43:05,983 INFO L231 Difference]: Finished difference. Result has 54 places, 67 transitions, 382 flow [2023-08-27 08:43:05,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=382, PETRI_PLACES=54, PETRI_TRANSITIONS=67} [2023-08-27 08:43:05,985 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-27 08:43:05,985 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 67 transitions, 382 flow [2023-08-27 08:43:05,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:05,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:05,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:05,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:43:05,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:05,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:05,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1296773867, now seen corresponding path program 1 times [2023-08-27 08:43:05,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:05,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715187342] [2023-08-27 08:43:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:05,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:06,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:06,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715187342] [2023-08-27 08:43:06,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715187342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:06,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:43:06,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:43:06,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095702281] [2023-08-27 08:43:06,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:06,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:06,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:06,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:06,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:43:06,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 392 [2023-08-27 08:43:06,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 67 transitions, 382 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:06,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 392 [2023-08-27 08:43:06,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:06,188 INFO L124 PetriNetUnfolderBase]: 227/456 cut-off events. [2023-08-27 08:43:06,188 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-08-27 08:43:06,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1267 conditions, 456 events. 227/456 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2010 event pairs, 171 based on Foata normal form. 14/378 useless extension candidates. Maximal degree in co-relation 1246. Up to 366 conditions per place. [2023-08-27 08:43:06,191 INFO L140 encePairwiseOnDemand]: 385/392 looper letters, 95 selfloop transitions, 5 changer transitions 1/101 dead transitions. [2023-08-27 08:43:06,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 101 transitions, 768 flow [2023-08-27 08:43:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:43:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:43:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 766 transitions. [2023-08-27 08:43:06,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39081632653061227 [2023-08-27 08:43:06,193 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 766 transitions. [2023-08-27 08:43:06,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 766 transitions. [2023-08-27 08:43:06,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:06,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 766 transitions. [2023-08-27 08:43:06,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.2) internal successors, (766), 5 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 392.0) internal successors, (2352), 6 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,200 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 392.0) internal successors, (2352), 6 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,200 INFO L175 Difference]: Start difference. First operand has 54 places, 67 transitions, 382 flow. Second operand 5 states and 766 transitions. [2023-08-27 08:43:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 101 transitions, 768 flow [2023-08-27 08:43:06,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 101 transitions, 766 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:06,206 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 417 flow [2023-08-27 08:43:06,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2023-08-27 08:43:06,207 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-27 08:43:06,207 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 417 flow [2023-08-27 08:43:06,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:06,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:06,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 08:43:06,208 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:06,208 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:06,208 INFO L85 PathProgramCache]: Analyzing trace with hash -577507467, now seen corresponding path program 1 times [2023-08-27 08:43:06,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:06,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019526445] [2023-08-27 08:43:06,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:06,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:06,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:06,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019526445] [2023-08-27 08:43:06,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019526445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:06,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457899463] [2023-08-27 08:43:06,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:06,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:06,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:06,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:06,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 08:43:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:06,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:43:06,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:06,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:06,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457899463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:06,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:06,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 08:43:06,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884819525] [2023-08-27 08:43:06,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:06,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:06,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:06,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:06,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:43:06,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 392 [2023-08-27 08:43:06,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 417 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:06,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 392 [2023-08-27 08:43:06,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:06,539 INFO L124 PetriNetUnfolderBase]: 177/368 cut-off events. [2023-08-27 08:43:06,539 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2023-08-27 08:43:06,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 368 events. 177/368 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1542 event pairs, 125 based on Foata normal form. 26/350 useless extension candidates. Maximal degree in co-relation 1048. Up to 368 conditions per place. [2023-08-27 08:43:06,542 INFO L140 encePairwiseOnDemand]: 389/392 looper letters, 66 selfloop transitions, 1 changer transitions 0/67 dead transitions. [2023-08-27 08:43:06,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 67 transitions, 543 flow [2023-08-27 08:43:06,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 530 transitions. [2023-08-27 08:43:06,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45068027210884354 [2023-08-27 08:43:06,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 530 transitions. [2023-08-27 08:43:06,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 530 transitions. [2023-08-27 08:43:06,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:06,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 530 transitions. [2023-08-27 08:43:06,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,548 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 417 flow. Second operand 3 states and 530 transitions. [2023-08-27 08:43:06,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 67 transitions, 543 flow [2023-08-27 08:43:06,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 521 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-27 08:43:06,552 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 389 flow [2023-08-27 08:43:06,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=389, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-08-27 08:43:06,553 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-08-27 08:43:06,553 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 389 flow [2023-08-27 08:43:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:06,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:06,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:06,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:06,762 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 08:43:06,762 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:06,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:06,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1908488446, now seen corresponding path program 1 times [2023-08-27 08:43:06,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:06,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206684997] [2023-08-27 08:43:06,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:07,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:07,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:07,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206684997] [2023-08-27 08:43:07,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206684997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:07,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827765960] [2023-08-27 08:43:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:07,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:07,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:07,045 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:07,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 08:43:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:07,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:43:07,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:43:07,164 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:07,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827765960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:07,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:07,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 08:43:07,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000116300] [2023-08-27 08:43:07,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:07,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:07,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:07,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:07,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:43:07,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 392 [2023-08-27 08:43:07,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:07,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:07,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 392 [2023-08-27 08:43:07,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:07,246 INFO L124 PetriNetUnfolderBase]: 179/376 cut-off events. [2023-08-27 08:43:07,247 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2023-08-27 08:43:07,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 376 events. 179/376 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1530 event pairs, 88 based on Foata normal form. 6/338 useless extension candidates. Maximal degree in co-relation 1053. Up to 201 conditions per place. [2023-08-27 08:43:07,249 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 76 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-27 08:43:07,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 576 flow [2023-08-27 08:43:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:07,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:07,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-08-27 08:43:07,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-08-27 08:43:07,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-08-27 08:43:07,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-08-27 08:43:07,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:07,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-08-27 08:43:07,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:07,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:07,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:07,255 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 389 flow. Second operand 3 states and 539 transitions. [2023-08-27 08:43:07,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 576 flow [2023-08-27 08:43:07,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 78 transitions, 575 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:07,258 INFO L231 Difference]: Finished difference. Result has 59 places, 68 transitions, 406 flow [2023-08-27 08:43:07,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=406, PETRI_PLACES=59, PETRI_TRANSITIONS=68} [2023-08-27 08:43:07,259 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 21 predicate places. [2023-08-27 08:43:07,259 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 68 transitions, 406 flow [2023-08-27 08:43:07,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:07,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:07,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:07,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:07,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:07,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:07,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash -966402235, now seen corresponding path program 1 times [2023-08-27 08:43:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:07,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396727920] [2023-08-27 08:43:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:08,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:08,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396727920] [2023-08-27 08:43:08,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396727920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:08,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52341040] [2023-08-27 08:43:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:08,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:08,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:08,423 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:08,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 08:43:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:08,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:43:08,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:08,577 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-27 08:43:08,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2023-08-27 08:43:08,665 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-27 08:43:08,665 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 20 treesize of output 30 [2023-08-27 08:43:08,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:43:08,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:08,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:08,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:08,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:09,124 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:09,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-27 08:43:09,134 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:09,135 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 08:43:09,151 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 68 treesize of output 56 [2023-08-27 08:43:09,157 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 08:43:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:09,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52341040] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:09,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:09,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2023-08-27 08:43:09,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076795501] [2023-08-27 08:43:09,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:09,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:43:09,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:43:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-08-27 08:43:09,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 392 [2023-08-27 08:43:09,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 68 transitions, 406 flow. Second operand has 21 states, 21 states have (on average 107.57142857142857) internal successors, (2259), 21 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:09,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:09,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 392 [2023-08-27 08:43:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:14,237 INFO L124 PetriNetUnfolderBase]: 697/1303 cut-off events. [2023-08-27 08:43:14,237 INFO L125 PetriNetUnfolderBase]: For 738/738 co-relation queries the response was YES. [2023-08-27 08:43:14,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3934 conditions, 1303 events. 697/1303 cut-off events. For 738/738 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6867 event pairs, 116 based on Foata normal form. 0/1043 useless extension candidates. Maximal degree in co-relation 3908. Up to 379 conditions per place. [2023-08-27 08:43:14,246 INFO L140 encePairwiseOnDemand]: 377/392 looper letters, 197 selfloop transitions, 84 changer transitions 15/296 dead transitions. [2023-08-27 08:43:14,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 296 transitions, 1819 flow [2023-08-27 08:43:14,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 08:43:14,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 08:43:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3984 transitions. [2023-08-27 08:43:14,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903790087463557 [2023-08-27 08:43:14,261 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3984 transitions. [2023-08-27 08:43:14,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3984 transitions. [2023-08-27 08:43:14,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:14,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3984 transitions. [2023-08-27 08:43:14,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 113.82857142857142) internal successors, (3984), 35 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:14,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 392.0) internal successors, (14112), 36 states have internal predecessors, (14112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:14,303 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 392.0) internal successors, (14112), 36 states have internal predecessors, (14112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:14,303 INFO L175 Difference]: Start difference. First operand has 59 places, 68 transitions, 406 flow. Second operand 35 states and 3984 transitions. [2023-08-27 08:43:14,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 296 transitions, 1819 flow [2023-08-27 08:43:14,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 296 transitions, 1732 flow, removed 40 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:14,313 INFO L231 Difference]: Finished difference. Result has 108 places, 122 transitions, 939 flow [2023-08-27 08:43:14,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=939, PETRI_PLACES=108, PETRI_TRANSITIONS=122} [2023-08-27 08:43:14,313 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2023-08-27 08:43:14,313 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 122 transitions, 939 flow [2023-08-27 08:43:14,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.57142857142857) internal successors, (2259), 21 states have internal predecessors, (2259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:14,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:14,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:14,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:14,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 08:43:14,516 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:14,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:14,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1216136522, now seen corresponding path program 1 times [2023-08-27 08:43:14,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:14,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117426598] [2023-08-27 08:43:14,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:14,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:14,995 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 08:43:14,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:14,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117426598] [2023-08-27 08:43:14,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117426598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:14,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41154989] [2023-08-27 08:43:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:14,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:14,997 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:15,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 08:43:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:15,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 08:43:15,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:15,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:43:15,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:43:15,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:15,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:43:15,318 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 08:43:15,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:15,340 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_380 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_380) c_~q2~0.base) (+ c_~q2~0.offset (* c_~q2_front~0 4))) 2147483647)) is different from false [2023-08-27 08:43:15,450 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:15,451 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 57 treesize of output 45 [2023-08-27 08:43:15,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:15,461 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 178 treesize of output 162 [2023-08-27 08:43:15,472 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:15,472 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 52 treesize of output 48 [2023-08-27 08:43:15,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-27 08:43:15,611 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 08:43:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41154989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:15,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 08:43:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242916887] [2023-08-27 08:43:15,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:43:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:15,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:43:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=284, Unknown=1, NotChecked=34, Total=380 [2023-08-27 08:43:15,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 392 [2023-08-27 08:43:15,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 122 transitions, 939 flow. Second operand has 20 states, 20 states have (on average 115.65) internal successors, (2313), 20 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:15,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:15,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 392 [2023-08-27 08:43:15,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:18,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:43:18,339 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (let ((.cse0 (< c_~q2_back~0 0)) (.cse1 (forall ((v_ArrVal_380 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_380) c_~q2~0.base) .cse3) 2147483647))) (.cse2 (select |c_#memory_int| c_~q2~0.base))) (and (or .cse0 (<= c_~n2~0 c_~q2_back~0) .cse1 (not (= c_~i~0 (select .cse2 (+ (* c_~q2_back~0 4) c_~q2~0.offset))))) (or .cse0 (< 0 c_~q2_back~0) (and (< c_~i~0 2147483647) (= c_~q2_front~0 c_~q2_back~0) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t2~0#1.base|))) .cse1 (< (select .cse2 .cse3) 2147483647)))) is different from false [2023-08-27 08:43:19,178 INFO L124 PetriNetUnfolderBase]: 750/1484 cut-off events. [2023-08-27 08:43:19,178 INFO L125 PetriNetUnfolderBase]: For 5431/5431 co-relation queries the response was YES. [2023-08-27 08:43:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5964 conditions, 1484 events. 750/1484 cut-off events. For 5431/5431 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8587 event pairs, 126 based on Foata normal form. 12/1314 useless extension candidates. Maximal degree in co-relation 5921. Up to 408 conditions per place. [2023-08-27 08:43:19,189 INFO L140 encePairwiseOnDemand]: 378/392 looper letters, 132 selfloop transitions, 106 changer transitions 3/241 dead transitions. [2023-08-27 08:43:19,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 241 transitions, 2153 flow [2023-08-27 08:43:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:43:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:43:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2792 transitions. [2023-08-27 08:43:19,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30967169476486245 [2023-08-27 08:43:19,197 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2792 transitions. [2023-08-27 08:43:19,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2792 transitions. [2023-08-27 08:43:19,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:19,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2792 transitions. [2023-08-27 08:43:19,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 121.3913043478261) internal successors, (2792), 23 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:19,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:19,214 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:19,215 INFO L175 Difference]: Start difference. First operand has 108 places, 122 transitions, 939 flow. Second operand 23 states and 2792 transitions. [2023-08-27 08:43:19,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 241 transitions, 2153 flow [2023-08-27 08:43:19,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 241 transitions, 2011 flow, removed 26 selfloop flow, removed 10 redundant places. [2023-08-27 08:43:19,240 INFO L231 Difference]: Finished difference. Result has 125 places, 165 transitions, 1592 flow [2023-08-27 08:43:19,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1592, PETRI_PLACES=125, PETRI_TRANSITIONS=165} [2023-08-27 08:43:19,240 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 87 predicate places. [2023-08-27 08:43:19,240 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 165 transitions, 1592 flow [2023-08-27 08:43:19,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 115.65) internal successors, (2313), 20 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:19,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:19,241 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:19,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:19,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 08:43:19,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:19,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1216136511, now seen corresponding path program 1 times [2023-08-27 08:43:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397395119] [2023-08-27 08:43:19,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:19,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:20,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:20,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397395119] [2023-08-27 08:43:20,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397395119] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:20,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294708621] [2023-08-27 08:43:20,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:20,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:20,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:20,145 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:20,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 08:43:20,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:20,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:43:20,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:20,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:43:20,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:20,354 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:20,354 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 24 treesize of output 16 [2023-08-27 08:43:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:43:20,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294708621] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:20,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:43:20,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 3] total 10 [2023-08-27 08:43:20,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564224320] [2023-08-27 08:43:20,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:20,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:20,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:20,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:43:20,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 392 [2023-08-27 08:43:20,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 165 transitions, 1592 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:20,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:20,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 392 [2023-08-27 08:43:20,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:20,682 INFO L124 PetriNetUnfolderBase]: 745/1477 cut-off events. [2023-08-27 08:43:20,682 INFO L125 PetriNetUnfolderBase]: For 7918/7918 co-relation queries the response was YES. [2023-08-27 08:43:20,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6819 conditions, 1477 events. 745/1477 cut-off events. For 7918/7918 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8460 event pairs, 162 based on Foata normal form. 0/1409 useless extension candidates. Maximal degree in co-relation 6774. Up to 832 conditions per place. [2023-08-27 08:43:20,698 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 168 selfloop transitions, 17 changer transitions 3/188 dead transitions. [2023-08-27 08:43:20,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 188 transitions, 2139 flow [2023-08-27 08:43:20,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:20,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:20,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 650 transitions. [2023-08-27 08:43:20,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145408163265306 [2023-08-27 08:43:20,699 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 650 transitions. [2023-08-27 08:43:20,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 650 transitions. [2023-08-27 08:43:20,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:20,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 650 transitions. [2023-08-27 08:43:20,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.5) internal successors, (650), 4 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:20,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:20,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:20,703 INFO L175 Difference]: Start difference. First operand has 125 places, 165 transitions, 1592 flow. Second operand 4 states and 650 transitions. [2023-08-27 08:43:20,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 188 transitions, 2139 flow [2023-08-27 08:43:20,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 188 transitions, 1804 flow, removed 147 selfloop flow, removed 7 redundant places. [2023-08-27 08:43:20,745 INFO L231 Difference]: Finished difference. Result has 122 places, 162 transitions, 1332 flow [2023-08-27 08:43:20,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1332, PETRI_PLACES=122, PETRI_TRANSITIONS=162} [2023-08-27 08:43:20,745 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-08-27 08:43:20,745 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 162 transitions, 1332 flow [2023-08-27 08:43:20,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:20,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:20,746 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:20,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:20,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 08:43:20,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:20,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:20,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1216136510, now seen corresponding path program 1 times [2023-08-27 08:43:20,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:20,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511009905] [2023-08-27 08:43:20,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:20,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:22,010 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 08:43:22,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:22,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511009905] [2023-08-27 08:43:22,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511009905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:22,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480707247] [2023-08-27 08:43:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:22,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:22,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:22,012 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:22,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 08:43:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:22,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:43:22,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:43:22,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:22,253 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:22,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 08:43:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:43:22,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480707247] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:22,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:43:22,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8, 3] total 13 [2023-08-27 08:43:22,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006749722] [2023-08-27 08:43:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:22,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:22,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:22,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:22,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:43:22,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 392 [2023-08-27 08:43:22,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 162 transitions, 1332 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:22,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:22,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 392 [2023-08-27 08:43:22,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:22,541 INFO L124 PetriNetUnfolderBase]: 675/1363 cut-off events. [2023-08-27 08:43:22,541 INFO L125 PetriNetUnfolderBase]: For 4643/4643 co-relation queries the response was YES. [2023-08-27 08:43:22,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5554 conditions, 1363 events. 675/1363 cut-off events. For 4643/4643 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7708 event pairs, 174 based on Foata normal form. 40/1343 useless extension candidates. Maximal degree in co-relation 5509. Up to 718 conditions per place. [2023-08-27 08:43:22,553 INFO L140 encePairwiseOnDemand]: 388/392 looper letters, 159 selfloop transitions, 11 changer transitions 3/173 dead transitions. [2023-08-27 08:43:22,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1685 flow [2023-08-27 08:43:22,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:22,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-27 08:43:22,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139030612244898 [2023-08-27 08:43:22,555 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-27 08:43:22,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-27 08:43:22,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:22,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-27 08:43:22,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:22,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:22,558 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:22,558 INFO L175 Difference]: Start difference. First operand has 122 places, 162 transitions, 1332 flow. Second operand 4 states and 649 transitions. [2023-08-27 08:43:22,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1685 flow [2023-08-27 08:43:22,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1645 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-08-27 08:43:22,575 INFO L231 Difference]: Finished difference. Result has 119 places, 147 transitions, 1169 flow [2023-08-27 08:43:22,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1169, PETRI_PLACES=119, PETRI_TRANSITIONS=147} [2023-08-27 08:43:22,575 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 81 predicate places. [2023-08-27 08:43:22,575 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 147 transitions, 1169 flow [2023-08-27 08:43:22,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:22,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:22,576 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:22,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:22,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 08:43:22,782 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:22,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:22,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1122701871, now seen corresponding path program 2 times [2023-08-27 08:43:22,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:22,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413392673] [2023-08-27 08:43:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:22,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:24,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413392673] [2023-08-27 08:43:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413392673] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:24,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674068291] [2023-08-27 08:43:24,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:43:24,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:24,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:24,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:24,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 08:43:24,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:43:24,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:24,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 08:43:24,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 08:43:24,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:24,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674068291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:24,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:24,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [10] total 12 [2023-08-27 08:43:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215198771] [2023-08-27 08:43:24,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:24,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:24,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:43:24,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 392 [2023-08-27 08:43:24,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 147 transitions, 1169 flow. Second operand has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:24,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:24,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 392 [2023-08-27 08:43:24,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:24,799 INFO L124 PetriNetUnfolderBase]: 690/1390 cut-off events. [2023-08-27 08:43:24,800 INFO L125 PetriNetUnfolderBase]: For 4165/4165 co-relation queries the response was YES. [2023-08-27 08:43:24,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5631 conditions, 1390 events. 690/1390 cut-off events. For 4165/4165 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7913 event pairs, 245 based on Foata normal form. 14/1342 useless extension candidates. Maximal degree in co-relation 5587. Up to 805 conditions per place. [2023-08-27 08:43:24,813 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 148 selfloop transitions, 24 changer transitions 1/173 dead transitions. [2023-08-27 08:43:24,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 173 transitions, 1689 flow [2023-08-27 08:43:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 652 transitions. [2023-08-27 08:43:24,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41581632653061223 [2023-08-27 08:43:24,815 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 652 transitions. [2023-08-27 08:43:24,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 652 transitions. [2023-08-27 08:43:24,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:24,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 652 transitions. [2023-08-27 08:43:24,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:24,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:24,819 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:24,819 INFO L175 Difference]: Start difference. First operand has 119 places, 147 transitions, 1169 flow. Second operand 4 states and 652 transitions. [2023-08-27 08:43:24,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 173 transitions, 1689 flow [2023-08-27 08:43:24,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1661 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:43:24,836 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1240 flow [2023-08-27 08:43:24,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1240, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2023-08-27 08:43:24,837 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 82 predicate places. [2023-08-27 08:43:24,838 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1240 flow [2023-08-27 08:43:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:24,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:24,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:24,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:25,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 08:43:25,044 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:25,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2070282351, now seen corresponding path program 3 times [2023-08-27 08:43:25,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088791366] [2023-08-27 08:43:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:25,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:26,290 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 08:43:26,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:26,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088791366] [2023-08-27 08:43:26,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088791366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:26,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125162677] [2023-08-27 08:43:26,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:43:26,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:26,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:26,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:26,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 08:43:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 08:43:26,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:26,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 08:43:26,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:26,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:26,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:43:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:43:26,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125162677] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:26,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:26,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-08-27 08:43:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485971882] [2023-08-27 08:43:26,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:26,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:43:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:26,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:43:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:43:26,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 392 [2023-08-27 08:43:26,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1240 flow. Second operand has 7 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:26,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:26,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 392 [2023-08-27 08:43:26,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:26,898 INFO L124 PetriNetUnfolderBase]: 701/1413 cut-off events. [2023-08-27 08:43:26,898 INFO L125 PetriNetUnfolderBase]: For 4511/4511 co-relation queries the response was YES. [2023-08-27 08:43:26,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5810 conditions, 1413 events. 701/1413 cut-off events. For 4511/4511 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8064 event pairs, 220 based on Foata normal form. 36/1377 useless extension candidates. Maximal degree in co-relation 5765. Up to 665 conditions per place. [2023-08-27 08:43:26,913 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 135 selfloop transitions, 33 changer transitions 1/169 dead transitions. [2023-08-27 08:43:26,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 169 transitions, 1683 flow [2023-08-27 08:43:26,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 596 transitions. [2023-08-27 08:43:26,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38010204081632654 [2023-08-27 08:43:26,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 596 transitions. [2023-08-27 08:43:26,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 596 transitions. [2023-08-27 08:43:26,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:26,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 596 transitions. [2023-08-27 08:43:26,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:26,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:26,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:26,921 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1240 flow. Second operand 4 states and 596 transitions. [2023-08-27 08:43:26,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 169 transitions, 1683 flow [2023-08-27 08:43:26,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 169 transitions, 1655 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:43:26,935 INFO L231 Difference]: Finished difference. Result has 121 places, 150 transitions, 1319 flow [2023-08-27 08:43:26,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1319, PETRI_PLACES=121, PETRI_TRANSITIONS=150} [2023-08-27 08:43:26,935 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 83 predicate places. [2023-08-27 08:43:26,935 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 150 transitions, 1319 flow [2023-08-27 08:43:26,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:26,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:26,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:26,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:27,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 08:43:27,142 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:27,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash 86648156, now seen corresponding path program 1 times [2023-08-27 08:43:27,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:27,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102095442] [2023-08-27 08:43:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:27,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:27,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102095442] [2023-08-27 08:43:27,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102095442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:27,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:43:27,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:43:27,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685005179] [2023-08-27 08:43:27,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:27,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:43:27,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:43:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:43:27,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 392 [2023-08-27 08:43:27,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 150 transitions, 1319 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:27,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:27,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 392 [2023-08-27 08:43:27,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:27,437 INFO L124 PetriNetUnfolderBase]: 701/1403 cut-off events. [2023-08-27 08:43:27,437 INFO L125 PetriNetUnfolderBase]: For 5181/5181 co-relation queries the response was YES. [2023-08-27 08:43:27,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6119 conditions, 1403 events. 701/1403 cut-off events. For 5181/5181 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7901 event pairs, 271 based on Foata normal form. 10/1341 useless extension candidates. Maximal degree in co-relation 6074. Up to 835 conditions per place. [2023-08-27 08:43:27,452 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 135 selfloop transitions, 17 changer transitions 11/163 dead transitions. [2023-08-27 08:43:27,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 163 transitions, 1748 flow [2023-08-27 08:43:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-27 08:43:27,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2023-08-27 08:43:27,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-27 08:43:27,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-27 08:43:27,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:27,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-27 08:43:27,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:27,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:27,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:27,457 INFO L175 Difference]: Start difference. First operand has 121 places, 150 transitions, 1319 flow. Second operand 3 states and 516 transitions. [2023-08-27 08:43:27,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 163 transitions, 1748 flow [2023-08-27 08:43:27,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 163 transitions, 1696 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-27 08:43:27,475 INFO L231 Difference]: Finished difference. Result has 122 places, 151 transitions, 1373 flow [2023-08-27 08:43:27,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1373, PETRI_PLACES=122, PETRI_TRANSITIONS=151} [2023-08-27 08:43:27,476 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-08-27 08:43:27,476 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 151 transitions, 1373 flow [2023-08-27 08:43:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:27,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:27,477 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 08:43:27,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 08:43:27,477 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:27,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:27,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1253211979, now seen corresponding path program 2 times [2023-08-27 08:43:27,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:27,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936361938] [2023-08-27 08:43:27,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:27,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:27,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936361938] [2023-08-27 08:43:27,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936361938] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:27,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108778491] [2023-08-27 08:43:27,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:43:27,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:27,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:27,647 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:27,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 08:43:27,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:43:27,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:27,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:43:27,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-27 08:43:27,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:27,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108778491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:27,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:27,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 08:43:27,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813460919] [2023-08-27 08:43:27,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:27,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:27,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:27,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:27,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:43:27,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 392 [2023-08-27 08:43:27,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 151 transitions, 1373 flow. Second operand has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:27,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:27,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 392 [2023-08-27 08:43:27,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:27,990 INFO L124 PetriNetUnfolderBase]: 638/1220 cut-off events. [2023-08-27 08:43:27,990 INFO L125 PetriNetUnfolderBase]: For 4603/4603 co-relation queries the response was YES. [2023-08-27 08:43:27,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5498 conditions, 1220 events. 638/1220 cut-off events. For 4603/4603 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6514 event pairs, 344 based on Foata normal form. 2/1150 useless extension candidates. Maximal degree in co-relation 5452. Up to 1220 conditions per place. [2023-08-27 08:43:28,003 INFO L140 encePairwiseOnDemand]: 390/392 looper letters, 145 selfloop transitions, 1 changer transitions 4/150 dead transitions. [2023-08-27 08:43:28,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 150 transitions, 1649 flow [2023-08-27 08:43:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:43:28,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:43:28,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-27 08:43:28,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2023-08-27 08:43:28,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-27 08:43:28,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-27 08:43:28,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:28,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-27 08:43:28,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,009 INFO L175 Difference]: Start difference. First operand has 122 places, 151 transitions, 1373 flow. Second operand 3 states and 486 transitions. [2023-08-27 08:43:28,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 150 transitions, 1649 flow [2023-08-27 08:43:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1537 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-08-27 08:43:28,052 INFO L231 Difference]: Finished difference. Result has 106 places, 146 transitions, 1220 flow [2023-08-27 08:43:28,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1237, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1220, PETRI_PLACES=106, PETRI_TRANSITIONS=146} [2023-08-27 08:43:28,053 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-27 08:43:28,053 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 146 transitions, 1220 flow [2023-08-27 08:43:28,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:28,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:28,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:28,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:28,259 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:28,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:28,260 INFO L85 PathProgramCache]: Analyzing trace with hash 512196732, now seen corresponding path program 1 times [2023-08-27 08:43:28,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:28,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016243756] [2023-08-27 08:43:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:28,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:28,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016243756] [2023-08-27 08:43:28,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016243756] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:28,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999177840] [2023-08-27 08:43:28,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:28,352 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:28,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 08:43:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:28,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:43:28,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:28,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:28,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999177840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:28,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:28,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 08:43:28,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678750264] [2023-08-27 08:43:28,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:28,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:43:28,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:43:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:43:28,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 392 [2023-08-27 08:43:28,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 146 transitions, 1220 flow. Second operand has 12 states, 12 states have (on average 144.08333333333334) internal successors, (1729), 12 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 08:43:28,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:28,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 392 [2023-08-27 08:43:28,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:28,877 INFO L124 PetriNetUnfolderBase]: 774/1493 cut-off events. [2023-08-27 08:43:28,877 INFO L125 PetriNetUnfolderBase]: For 5974/5974 co-relation queries the response was YES. [2023-08-27 08:43:28,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6690 conditions, 1493 events. 774/1493 cut-off events. For 5974/5974 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8654 event pairs, 300 based on Foata normal form. 42/1463 useless extension candidates. Maximal degree in co-relation 6655. Up to 801 conditions per place. [2023-08-27 08:43:28,888 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 201 selfloop transitions, 16 changer transitions 5/222 dead transitions. [2023-08-27 08:43:28,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 222 transitions, 2308 flow [2023-08-27 08:43:28,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:43:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:43:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1047 transitions. [2023-08-27 08:43:28,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815597667638484 [2023-08-27 08:43:28,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1047 transitions. [2023-08-27 08:43:28,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1047 transitions. [2023-08-27 08:43:28,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:28,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1047 transitions. [2023-08-27 08:43:28,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 149.57142857142858) internal successors, (1047), 7 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 392.0) internal successors, (3136), 8 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,898 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 392.0) internal successors, (3136), 8 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:28,898 INFO L175 Difference]: Start difference. First operand has 106 places, 146 transitions, 1220 flow. Second operand 7 states and 1047 transitions. [2023-08-27 08:43:28,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 222 transitions, 2308 flow [2023-08-27 08:43:28,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 222 transitions, 2292 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-27 08:43:28,919 INFO L231 Difference]: Finished difference. Result has 109 places, 147 transitions, 1287 flow [2023-08-27 08:43:28,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1287, PETRI_PLACES=109, PETRI_TRANSITIONS=147} [2023-08-27 08:43:28,920 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2023-08-27 08:43:28,920 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 147 transitions, 1287 flow [2023-08-27 08:43:28,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.08333333333334) internal successors, (1729), 12 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 08:43:28,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:28,921 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:28,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:29,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:29,126 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:29,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1787662198, now seen corresponding path program 1 times [2023-08-27 08:43:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:29,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233915888] [2023-08-27 08:43:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233915888] [2023-08-27 08:43:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233915888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339782357] [2023-08-27 08:43:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:29,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:29,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:29,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:29,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 08:43:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:29,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:43:29,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:29,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:29,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339782357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:29,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:43:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633365155] [2023-08-27 08:43:29,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:43:29,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:43:29,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:43:29,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 392 [2023-08-27 08:43:29,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 147 transitions, 1287 flow. Second operand has 12 states, 12 states have (on average 144.58333333333334) internal successors, (1735), 12 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:29,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:29,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 392 [2023-08-27 08:43:29,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:29,767 INFO L124 PetriNetUnfolderBase]: 754/1489 cut-off events. [2023-08-27 08:43:29,767 INFO L125 PetriNetUnfolderBase]: For 5630/5630 co-relation queries the response was YES. [2023-08-27 08:43:29,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6530 conditions, 1489 events. 754/1489 cut-off events. For 5630/5630 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8740 event pairs, 396 based on Foata normal form. 36/1459 useless extension candidates. Maximal degree in co-relation 6493. Up to 1089 conditions per place. [2023-08-27 08:43:29,777 INFO L140 encePairwiseOnDemand]: 388/392 looper letters, 139 selfloop transitions, 20 changer transitions 5/164 dead transitions. [2023-08-27 08:43:29,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 164 transitions, 1670 flow [2023-08-27 08:43:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:43:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:43:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 904 transitions. [2023-08-27 08:43:29,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2023-08-27 08:43:29,779 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 904 transitions. [2023-08-27 08:43:29,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 904 transitions. [2023-08-27 08:43:29,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:29,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 904 transitions. [2023-08-27 08:43:29,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 150.66666666666666) internal successors, (904), 6 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:29,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:29,783 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:29,783 INFO L175 Difference]: Start difference. First operand has 109 places, 147 transitions, 1287 flow. Second operand 6 states and 904 transitions. [2023-08-27 08:43:29,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 164 transitions, 1670 flow [2023-08-27 08:43:29,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 164 transitions, 1643 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-27 08:43:29,799 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1231 flow [2023-08-27 08:43:29,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1231, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2023-08-27 08:43:29,800 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2023-08-27 08:43:29,801 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1231 flow [2023-08-27 08:43:29,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 144.58333333333334) internal successors, (1735), 12 states have internal predecessors, (1735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:29,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:29,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:29,809 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 08:43:30,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:30,009 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:30,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1371473212, now seen corresponding path program 1 times [2023-08-27 08:43:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535275992] [2023-08-27 08:43:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535275992] [2023-08-27 08:43:30,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535275992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:30,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176851315] [2023-08-27 08:43:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:30,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:30,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:30,165 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:30,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 08:43:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:30,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:43:30,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-27 08:43:30,316 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:30,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176851315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:30,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:30,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-08-27 08:43:30,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552177449] [2023-08-27 08:43:30,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:30,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:30,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-27 08:43:30,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 392 [2023-08-27 08:43:30,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1231 flow. Second operand has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:30,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:30,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 392 [2023-08-27 08:43:30,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:30,605 INFO L124 PetriNetUnfolderBase]: 985/1982 cut-off events. [2023-08-27 08:43:30,605 INFO L125 PetriNetUnfolderBase]: For 7171/7171 co-relation queries the response was YES. [2023-08-27 08:43:30,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8337 conditions, 1982 events. 985/1982 cut-off events. For 7171/7171 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12280 event pairs, 336 based on Foata normal form. 94/1970 useless extension candidates. Maximal degree in co-relation 8301. Up to 822 conditions per place. [2023-08-27 08:43:30,619 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 137 selfloop transitions, 39 changer transitions 0/176 dead transitions. [2023-08-27 08:43:30,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 176 transitions, 1861 flow [2023-08-27 08:43:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:30,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:30,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 723 transitions. [2023-08-27 08:43:30,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4610969387755102 [2023-08-27 08:43:30,621 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 723 transitions. [2023-08-27 08:43:30,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 723 transitions. [2023-08-27 08:43:30,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:30,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 723 transitions. [2023-08-27 08:43:30,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.75) internal successors, (723), 4 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:30,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:30,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:30,624 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1231 flow. Second operand 4 states and 723 transitions. [2023-08-27 08:43:30,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 176 transitions, 1861 flow [2023-08-27 08:43:30,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 176 transitions, 1816 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-27 08:43:30,647 INFO L231 Difference]: Finished difference. Result has 108 places, 151 transitions, 1509 flow [2023-08-27 08:43:30,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1509, PETRI_PLACES=108, PETRI_TRANSITIONS=151} [2023-08-27 08:43:30,647 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 70 predicate places. [2023-08-27 08:43:30,647 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 151 transitions, 1509 flow [2023-08-27 08:43:30,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.25) internal successors, (681), 4 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:30,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:30,648 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:30,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:30,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:30,854 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:30,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:30,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1731786094, now seen corresponding path program 2 times [2023-08-27 08:43:30,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:30,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248175776] [2023-08-27 08:43:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:30,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:43:32,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:32,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248175776] [2023-08-27 08:43:32,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248175776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:32,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061635077] [2023-08-27 08:43:32,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:43:32,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:32,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:32,510 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:32,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 08:43:32,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:43:32,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:32,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 08:43:32,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:32,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:43:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 08:43:32,821 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061635077] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:32,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 16 [2023-08-27 08:43:32,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045326533] [2023-08-27 08:43:32,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:32,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:43:32,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:32,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:43:32,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:43:32,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 392 [2023-08-27 08:43:32,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 151 transitions, 1509 flow. Second operand has 7 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:32,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:32,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 392 [2023-08-27 08:43:32,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:33,153 INFO L124 PetriNetUnfolderBase]: 928/1877 cut-off events. [2023-08-27 08:43:33,153 INFO L125 PetriNetUnfolderBase]: For 8907/8907 co-relation queries the response was YES. [2023-08-27 08:43:33,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8501 conditions, 1877 events. 928/1877 cut-off events. For 8907/8907 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11452 event pairs, 270 based on Foata normal form. 12/1815 useless extension candidates. Maximal degree in co-relation 8463. Up to 1106 conditions per place. [2023-08-27 08:43:33,168 INFO L140 encePairwiseOnDemand]: 388/392 looper letters, 124 selfloop transitions, 36 changer transitions 6/166 dead transitions. [2023-08-27 08:43:33,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 166 transitions, 1892 flow [2023-08-27 08:43:33,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:33,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:33,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 593 transitions. [2023-08-27 08:43:33,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3781887755102041 [2023-08-27 08:43:33,169 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 593 transitions. [2023-08-27 08:43:33,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 593 transitions. [2023-08-27 08:43:33,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:33,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 593 transitions. [2023-08-27 08:43:33,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:33,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:33,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:33,172 INFO L175 Difference]: Start difference. First operand has 108 places, 151 transitions, 1509 flow. Second operand 4 states and 593 transitions. [2023-08-27 08:43:33,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 166 transitions, 1892 flow [2023-08-27 08:43:33,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 166 transitions, 1843 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-27 08:43:33,197 INFO L231 Difference]: Finished difference. Result has 109 places, 147 transitions, 1478 flow [2023-08-27 08:43:33,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1406, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1478, PETRI_PLACES=109, PETRI_TRANSITIONS=147} [2023-08-27 08:43:33,197 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2023-08-27 08:43:33,197 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 147 transitions, 1478 flow [2023-08-27 08:43:33,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 138.57142857142858) internal successors, (970), 7 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:33,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:33,198 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:33,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:33,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:33,404 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:33,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:33,404 INFO L85 PathProgramCache]: Analyzing trace with hash -971427298, now seen corresponding path program 2 times [2023-08-27 08:43:33,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:33,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990490548] [2023-08-27 08:43:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:33,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:33,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:33,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990490548] [2023-08-27 08:43:33,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990490548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:33,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115922841] [2023-08-27 08:43:33,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:43:33,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:33,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:33,661 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:33,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 08:43:33,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:43:33,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:33,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 08:43:33,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:33,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:34,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:34,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115922841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:34,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:34,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2023-08-27 08:43:34,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551934147] [2023-08-27 08:43:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:34,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:43:34,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:34,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:43:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:43:34,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 392 [2023-08-27 08:43:34,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 147 transitions, 1478 flow. Second operand has 18 states, 18 states have (on average 142.22222222222223) internal successors, (2560), 18 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:34,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:34,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 392 [2023-08-27 08:43:34,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:34,603 INFO L124 PetriNetUnfolderBase]: 794/1631 cut-off events. [2023-08-27 08:43:34,604 INFO L125 PetriNetUnfolderBase]: For 9140/9140 co-relation queries the response was YES. [2023-08-27 08:43:34,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7340 conditions, 1631 events. 794/1631 cut-off events. For 9140/9140 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 9634 event pairs, 248 based on Foata normal form. 36/1611 useless extension candidates. Maximal degree in co-relation 7302. Up to 976 conditions per place. [2023-08-27 08:43:34,615 INFO L140 encePairwiseOnDemand]: 383/392 looper letters, 174 selfloop transitions, 25 changer transitions 23/222 dead transitions. [2023-08-27 08:43:34,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 222 transitions, 2579 flow [2023-08-27 08:43:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 08:43:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 08:43:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1468 transitions. [2023-08-27 08:43:34,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37448979591836734 [2023-08-27 08:43:34,617 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1468 transitions. [2023-08-27 08:43:34,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1468 transitions. [2023-08-27 08:43:34,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:34,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1468 transitions. [2023-08-27 08:43:34,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 146.8) internal successors, (1468), 10 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:34,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 392.0) internal successors, (4312), 11 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:34,623 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 392.0) internal successors, (4312), 11 states have internal predecessors, (4312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:34,623 INFO L175 Difference]: Start difference. First operand has 109 places, 147 transitions, 1478 flow. Second operand 10 states and 1468 transitions. [2023-08-27 08:43:34,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 222 transitions, 2579 flow [2023-08-27 08:43:34,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 222 transitions, 2435 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 08:43:34,645 INFO L231 Difference]: Finished difference. Result has 116 places, 151 transitions, 1533 flow [2023-08-27 08:43:34,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1533, PETRI_PLACES=116, PETRI_TRANSITIONS=151} [2023-08-27 08:43:34,646 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 78 predicate places. [2023-08-27 08:43:34,646 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 151 transitions, 1533 flow [2023-08-27 08:43:34,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 142.22222222222223) internal successors, (2560), 18 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:34,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:34,647 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:34,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:34,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:34,853 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:34,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:34,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1321247679, now seen corresponding path program 1 times [2023-08-27 08:43:34,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:34,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397010201] [2023-08-27 08:43:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:34,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:34,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:43:34,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:34,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397010201] [2023-08-27 08:43:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397010201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:34,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764022532] [2023-08-27 08:43:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:34,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:34,954 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:34,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 08:43:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:35,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:43:35,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 08:43:35,116 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:43:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764022532] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:43:35,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:43:35,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-08-27 08:43:35,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235167645] [2023-08-27 08:43:35,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:43:35,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:43:35,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:43:35,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:43:35,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 392 [2023-08-27 08:43:35,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 151 transitions, 1533 flow. Second operand has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:35,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:35,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 392 [2023-08-27 08:43:35,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:35,441 INFO L124 PetriNetUnfolderBase]: 1005/2086 cut-off events. [2023-08-27 08:43:35,442 INFO L125 PetriNetUnfolderBase]: For 10728/10728 co-relation queries the response was YES. [2023-08-27 08:43:35,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 2086 events. 1005/2086 cut-off events. For 10728/10728 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13126 event pairs, 391 based on Foata normal form. 56/2052 useless extension candidates. Maximal degree in co-relation 9129. Up to 1097 conditions per place. [2023-08-27 08:43:35,455 INFO L140 encePairwiseOnDemand]: 387/392 looper letters, 174 selfloop transitions, 22 changer transitions 1/197 dead transitions. [2023-08-27 08:43:35,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 197 transitions, 2350 flow [2023-08-27 08:43:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:43:35,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:43:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 721 transitions. [2023-08-27 08:43:35,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45982142857142855 [2023-08-27 08:43:35,457 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 721 transitions. [2023-08-27 08:43:35,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 721 transitions. [2023-08-27 08:43:35,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:35,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 721 transitions. [2023-08-27 08:43:35,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 180.25) internal successors, (721), 4 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:35,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:35,460 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 392.0) internal successors, (1960), 5 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:35,461 INFO L175 Difference]: Start difference. First operand has 116 places, 151 transitions, 1533 flow. Second operand 4 states and 721 transitions. [2023-08-27 08:43:35,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 197 transitions, 2350 flow [2023-08-27 08:43:35,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 197 transitions, 2278 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-27 08:43:35,482 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1544 flow [2023-08-27 08:43:35,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1544, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2023-08-27 08:43:35,482 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 75 predicate places. [2023-08-27 08:43:35,482 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1544 flow [2023-08-27 08:43:35,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:35,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:35,483 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:35,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:35,689 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,SelfDestructingSolverStorable24 [2023-08-27 08:43:35,690 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:35,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1583967507, now seen corresponding path program 2 times [2023-08-27 08:43:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:35,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927730394] [2023-08-27 08:43:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:36,518 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 08:43:36,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:36,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927730394] [2023-08-27 08:43:36,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927730394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:36,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607857370] [2023-08-27 08:43:36,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:43:36,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:36,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:36,521 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:36,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 08:43:36,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:43:36,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:43:36,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:43:36,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:36,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:43:36,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:36,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:36,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:43:37,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:37,599 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:37,599 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-27 08:43:37,610 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:37,610 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 08:43:37,617 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 08:43:37,624 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 08:43:38,085 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 08:43:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607857370] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:38,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-08-27 08:43:38,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372635266] [2023-08-27 08:43:38,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:38,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:43:38,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:38,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:43:38,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=925, Unknown=2, NotChecked=0, Total=1056 [2023-08-27 08:43:38,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 392 [2023-08-27 08:43:38,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1544 flow. Second operand has 33 states, 33 states have (on average 108.48484848484848) internal successors, (3580), 33 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:38,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:38,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 392 [2023-08-27 08:43:38,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:43,300 INFO L124 PetriNetUnfolderBase]: 2993/6154 cut-off events. [2023-08-27 08:43:43,301 INFO L125 PetriNetUnfolderBase]: For 35949/35949 co-relation queries the response was YES. [2023-08-27 08:43:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28197 conditions, 6154 events. 2993/6154 cut-off events. For 35949/35949 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 48257 event pairs, 695 based on Foata normal form. 424/6206 useless extension candidates. Maximal degree in co-relation 28158. Up to 1345 conditions per place. [2023-08-27 08:43:43,389 INFO L140 encePairwiseOnDemand]: 378/392 looper letters, 308 selfloop transitions, 145 changer transitions 38/491 dead transitions. [2023-08-27 08:43:43,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 491 transitions, 5421 flow [2023-08-27 08:43:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 08:43:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 08:43:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5344 transitions. [2023-08-27 08:43:43,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2900564481111594 [2023-08-27 08:43:43,397 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5344 transitions. [2023-08-27 08:43:43,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5344 transitions. [2023-08-27 08:43:43,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:43:43,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5344 transitions. [2023-08-27 08:43:43,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 113.70212765957447) internal successors, (5344), 47 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:43,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 392.0) internal successors, (18816), 48 states have internal predecessors, (18816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:43,419 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 392.0) internal successors, (18816), 48 states have internal predecessors, (18816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:43,419 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1544 flow. Second operand 47 states and 5344 transitions. [2023-08-27 08:43:43,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 491 transitions, 5421 flow [2023-08-27 08:43:43,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 491 transitions, 5196 flow, removed 104 selfloop flow, removed 1 redundant places. [2023-08-27 08:43:43,498 INFO L231 Difference]: Finished difference. Result has 178 places, 246 transitions, 3352 flow [2023-08-27 08:43:43,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=3352, PETRI_PLACES=178, PETRI_TRANSITIONS=246} [2023-08-27 08:43:43,499 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 140 predicate places. [2023-08-27 08:43:43,499 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 246 transitions, 3352 flow [2023-08-27 08:43:43,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 108.48484848484848) internal successors, (3580), 33 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:43,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:43:43,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:43:43,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 08:43:43,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 08:43:43,706 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:43:43,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:43:43,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1583967518, now seen corresponding path program 1 times [2023-08-27 08:43:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:43:43,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824577372] [2023-08-27 08:43:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:43,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:43:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:44,571 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 08:43:44,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:43:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824577372] [2023-08-27 08:43:44,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824577372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:43:44,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246805200] [2023-08-27 08:43:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:43:44,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:43:44,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:43:44,573 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:43:44,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 08:43:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:43:44,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:43:44,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:43:44,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:44,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:44,706 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-27 08:43:44,706 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-27 08:43:44,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:43:44,836 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:43:44,836 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:43:44,881 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:44,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:44,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:44,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:45,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:43:45,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:43:45,206 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 08:43:45,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:43:45,599 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:45,599 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 35 treesize of output 36 [2023-08-27 08:43:45,612 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:43:45,612 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 181 treesize of output 174 [2023-08-27 08:43:45,618 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 159 treesize of output 131 [2023-08-27 08:43:45,627 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 61 [2023-08-27 08:43:45,636 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 124 treesize of output 110 [2023-08-27 08:43:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:43:45,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246805200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:43:45,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:43:45,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 08:43:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780420887] [2023-08-27 08:43:45,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:43:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:43:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:43:45,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:43:45,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=846, Unknown=6, NotChecked=0, Total=992 [2023-08-27 08:43:45,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 392 [2023-08-27 08:43:45,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 246 transitions, 3352 flow. Second operand has 32 states, 32 states have (on average 119.59375) internal successors, (3827), 32 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:43:45,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:43:45,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 392 [2023-08-27 08:43:45,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:43:52,786 WARN L234 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 51 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:43:59,017 WARN L234 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:44:04,895 INFO L124 PetriNetUnfolderBase]: 6088/11893 cut-off events. [2023-08-27 08:44:04,895 INFO L125 PetriNetUnfolderBase]: For 122216/122216 co-relation queries the response was YES. [2023-08-27 08:44:04,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66964 conditions, 11893 events. 6088/11893 cut-off events. For 122216/122216 co-relation queries the response was YES. Maximal size of possible extension queue 792. Compared 100282 event pairs, 1516 based on Foata normal form. 154/11109 useless extension candidates. Maximal degree in co-relation 66904. Up to 5910 conditions per place. [2023-08-27 08:44:04,994 INFO L140 encePairwiseOnDemand]: 381/392 looper letters, 467 selfloop transitions, 131 changer transitions 26/624 dead transitions. [2023-08-27 08:44:04,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 624 transitions, 9427 flow [2023-08-27 08:44:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 08:44:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 08:44:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3251 transitions. [2023-08-27 08:44:05,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3189756671899529 [2023-08-27 08:44:05,001 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3251 transitions. [2023-08-27 08:44:05,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3251 transitions. [2023-08-27 08:44:05,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:44:05,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3251 transitions. [2023-08-27 08:44:05,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 125.03846153846153) internal successors, (3251), 26 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:05,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 392.0) internal successors, (10584), 27 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:05,019 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 392.0) internal successors, (10584), 27 states have internal predecessors, (10584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:05,019 INFO L175 Difference]: Start difference. First operand has 178 places, 246 transitions, 3352 flow. Second operand 26 states and 3251 transitions. [2023-08-27 08:44:05,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 624 transitions, 9427 flow [2023-08-27 08:44:05,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 624 transitions, 8604 flow, removed 359 selfloop flow, removed 11 redundant places. [2023-08-27 08:44:05,445 INFO L231 Difference]: Finished difference. Result has 200 places, 336 transitions, 4772 flow [2023-08-27 08:44:05,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=2992, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4772, PETRI_PLACES=200, PETRI_TRANSITIONS=336} [2023-08-27 08:44:05,446 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 162 predicate places. [2023-08-27 08:44:05,446 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 336 transitions, 4772 flow [2023-08-27 08:44:05,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 119.59375) internal successors, (3827), 32 states have internal predecessors, (3827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:05,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:44:05,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:44:05,453 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 08:44:05,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 08:44:05,652 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:44:05,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:44:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1757697495, now seen corresponding path program 1 times [2023-08-27 08:44:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:44:05,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55405340] [2023-08-27 08:44:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:05,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:44:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:07,710 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 08:44:07,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:44:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55405340] [2023-08-27 08:44:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55405340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:44:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434734654] [2023-08-27 08:44:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:07,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:44:07,711 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:44:07,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 08:44:07,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:07,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:44:07,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:44:08,166 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 08:44:08,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:44:08,271 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:44:08,271 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 24 treesize of output 17 [2023-08-27 08:44:08,528 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 08:44:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434734654] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:44:08,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:44:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 28 [2023-08-27 08:44:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452820964] [2023-08-27 08:44:08,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:44:08,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:44:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:44:08,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:44:08,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2023-08-27 08:44:08,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 392 [2023-08-27 08:44:08,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 336 transitions, 4772 flow. Second operand has 30 states, 30 states have (on average 99.63333333333334) internal successors, (2989), 30 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:08,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:44:08,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 392 [2023-08-27 08:44:08,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:44:16,440 INFO L124 PetriNetUnfolderBase]: 12534/23710 cut-off events. [2023-08-27 08:44:16,441 INFO L125 PetriNetUnfolderBase]: For 304865/304865 co-relation queries the response was YES. [2023-08-27 08:44:16,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145117 conditions, 23710 events. 12534/23710 cut-off events. For 304865/304865 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 207158 event pairs, 2350 based on Foata normal form. 0/22330 useless extension candidates. Maximal degree in co-relation 145050. Up to 5444 conditions per place. [2023-08-27 08:44:16,712 INFO L140 encePairwiseOnDemand]: 378/392 looper letters, 777 selfloop transitions, 283 changer transitions 6/1066 dead transitions. [2023-08-27 08:44:16,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 1066 transitions, 16166 flow [2023-08-27 08:44:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:44:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:44:16,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3646 transitions. [2023-08-27 08:44:16,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2735594237695078 [2023-08-27 08:44:16,718 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3646 transitions. [2023-08-27 08:44:16,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3646 transitions. [2023-08-27 08:44:16,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:44:16,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3646 transitions. [2023-08-27 08:44:16,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 107.23529411764706) internal successors, (3646), 34 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:16,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 392.0) internal successors, (13720), 35 states have internal predecessors, (13720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:16,733 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 392.0) internal successors, (13720), 35 states have internal predecessors, (13720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:16,733 INFO L175 Difference]: Start difference. First operand has 200 places, 336 transitions, 4772 flow. Second operand 34 states and 3646 transitions. [2023-08-27 08:44:16,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 1066 transitions, 16166 flow [2023-08-27 08:44:17,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1066 transitions, 15743 flow, removed 199 selfloop flow, removed 6 redundant places. [2023-08-27 08:44:17,486 INFO L231 Difference]: Finished difference. Result has 245 places, 489 transitions, 8014 flow [2023-08-27 08:44:17,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=8014, PETRI_PLACES=245, PETRI_TRANSITIONS=489} [2023-08-27 08:44:17,486 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 207 predicate places. [2023-08-27 08:44:17,487 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 489 transitions, 8014 flow [2023-08-27 08:44:17,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 99.63333333333334) internal successors, (2989), 30 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:17,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:44:17,487 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:44:17,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 08:44:17,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:17,691 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:44:17,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:44:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1583967506, now seen corresponding path program 1 times [2023-08-27 08:44:17,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:44:17,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282148046] [2023-08-27 08:44:17,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:17,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:44:17,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:19,146 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 08:44:19,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:44:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282148046] [2023-08-27 08:44:19,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282148046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:44:19,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408029816] [2023-08-27 08:44:19,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:19,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:19,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:44:19,149 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:44:19,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 08:44:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:19,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:44:19,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:44:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 08:44:19,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:44:19,449 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:44:19,449 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 23 treesize of output 15 [2023-08-27 08:44:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 08:44:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408029816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:44:19,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:44:19,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 3, 3] total 17 [2023-08-27 08:44:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735811301] [2023-08-27 08:44:19,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:44:19,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 08:44:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:44:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 08:44:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2023-08-27 08:44:19,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 392 [2023-08-27 08:44:19,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 489 transitions, 8014 flow. Second operand has 19 states, 19 states have (on average 107.6842105263158) internal successors, (2046), 19 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:19,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:44:19,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 392 [2023-08-27 08:44:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:44:25,453 INFO L124 PetriNetUnfolderBase]: 12343/23195 cut-off events. [2023-08-27 08:44:25,453 INFO L125 PetriNetUnfolderBase]: For 428289/428289 co-relation queries the response was YES. [2023-08-27 08:44:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156860 conditions, 23195 events. 12343/23195 cut-off events. For 428289/428289 co-relation queries the response was YES. Maximal size of possible extension queue 1154. Compared 201437 event pairs, 3748 based on Foata normal form. 198/22559 useless extension candidates. Maximal degree in co-relation 156774. Up to 13373 conditions per place. [2023-08-27 08:44:25,703 INFO L140 encePairwiseOnDemand]: 380/392 looper letters, 582 selfloop transitions, 143 changer transitions 11/736 dead transitions. [2023-08-27 08:44:25,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 736 transitions, 13563 flow [2023-08-27 08:44:25,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:44:25,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:44:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2583 transitions. [2023-08-27 08:44:25,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2864906832298137 [2023-08-27 08:44:25,707 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2583 transitions. [2023-08-27 08:44:25,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2583 transitions. [2023-08-27 08:44:25,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:44:25,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2583 transitions. [2023-08-27 08:44:25,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 112.30434782608695) internal successors, (2583), 23 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:25,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:25,719 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:25,719 INFO L175 Difference]: Start difference. First operand has 245 places, 489 transitions, 8014 flow. Second operand 23 states and 2583 transitions. [2023-08-27 08:44:25,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 736 transitions, 13563 flow [2023-08-27 08:44:27,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 736 transitions, 11911 flow, removed 795 selfloop flow, removed 13 redundant places. [2023-08-27 08:44:27,372 INFO L231 Difference]: Finished difference. Result has 256 places, 498 transitions, 7396 flow [2023-08-27 08:44:27,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=6807, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=7396, PETRI_PLACES=256, PETRI_TRANSITIONS=498} [2023-08-27 08:44:27,373 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 218 predicate places. [2023-08-27 08:44:27,373 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 498 transitions, 7396 flow [2023-08-27 08:44:27,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 107.6842105263158) internal successors, (2046), 19 states have internal predecessors, (2046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:27,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:44:27,373 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:44:27,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-27 08:44:27,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 08:44:27,575 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:44:27,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:44:27,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1755016306, now seen corresponding path program 2 times [2023-08-27 08:44:27,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:44:27,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252541517] [2023-08-27 08:44:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:27,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:44:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:28,326 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 08:44:28,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:44:28,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252541517] [2023-08-27 08:44:28,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252541517] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:44:28,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660851133] [2023-08-27 08:44:28,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:44:28,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:28,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:44:28,329 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:44:28,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 08:44:28,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:44:28,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:44:28,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:44:28,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:44:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:44:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:44:28,531 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-27 08:44:28,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-27 08:44:28,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:44:28,688 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:44:28,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:44:28,749 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 20 treesize of output 22 [2023-08-27 08:44:28,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:44:28,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:44:28,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:44:28,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:44:28,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-08-27 08:44:29,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:44:29,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:44:29,595 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:44:29,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2023-08-27 08:44:29,605 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:44:29,605 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 165 [2023-08-27 08:44:29,615 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 78 treesize of output 72 [2023-08-27 08:44:29,622 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 146 treesize of output 122 [2023-08-27 08:44:29,629 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 122 treesize of output 110 [2023-08-27 08:44:29,962 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 08:44:29,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660851133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:44:29,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:44:29,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-08-27 08:44:29,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069541602] [2023-08-27 08:44:29,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:44:29,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:44:29,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:44:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:44:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=742, Unknown=6, NotChecked=0, Total=870 [2023-08-27 08:44:29,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 392 [2023-08-27 08:44:29,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 498 transitions, 7396 flow. Second operand has 30 states, 30 states have (on average 119.7) internal successors, (3591), 30 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:29,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:44:29,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 392 [2023-08-27 08:44:29,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:44:32,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:44:34,549 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 [0, 1] [2023-08-27 08:44:41,883 INFO L124 PetriNetUnfolderBase]: 14468/27828 cut-off events. [2023-08-27 08:44:41,883 INFO L125 PetriNetUnfolderBase]: For 514025/514025 co-relation queries the response was YES. [2023-08-27 08:44:42,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174315 conditions, 27828 events. 14468/27828 cut-off events. For 514025/514025 co-relation queries the response was YES. Maximal size of possible extension queue 1394. Compared 255556 event pairs, 5537 based on Foata normal form. 1552/28286 useless extension candidates. Maximal degree in co-relation 174229. Up to 15086 conditions per place. [2023-08-27 08:44:42,186 INFO L140 encePairwiseOnDemand]: 383/392 looper letters, 606 selfloop transitions, 112 changer transitions 21/739 dead transitions. [2023-08-27 08:44:42,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 739 transitions, 12167 flow [2023-08-27 08:44:42,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 08:44:42,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 08:44:42,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2620 transitions. [2023-08-27 08:44:42,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3182701652089407 [2023-08-27 08:44:42,190 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2620 transitions. [2023-08-27 08:44:42,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2620 transitions. [2023-08-27 08:44:42,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:44:42,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2620 transitions. [2023-08-27 08:44:42,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 124.76190476190476) internal successors, (2620), 21 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:42,199 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 392.0) internal successors, (8624), 22 states have internal predecessors, (8624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:42,199 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 392.0) internal successors, (8624), 22 states have internal predecessors, (8624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:42,199 INFO L175 Difference]: Start difference. First operand has 256 places, 498 transitions, 7396 flow. Second operand 21 states and 2620 transitions. [2023-08-27 08:44:42,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 739 transitions, 12167 flow [2023-08-27 08:44:44,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 739 transitions, 11429 flow, removed 114 selfloop flow, removed 20 redundant places. [2023-08-27 08:44:44,363 INFO L231 Difference]: Finished difference. Result has 257 places, 446 transitions, 6574 flow [2023-08-27 08:44:44,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=6216, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6574, PETRI_PLACES=257, PETRI_TRANSITIONS=446} [2023-08-27 08:44:44,364 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 219 predicate places. [2023-08-27 08:44:44,364 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 446 transitions, 6574 flow [2023-08-27 08:44:44,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 119.7) internal successors, (3591), 30 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:44,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:44:44,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:44:44,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 08:44:44,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:44,570 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:44:44,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:44:44,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1764958924, now seen corresponding path program 2 times [2023-08-27 08:44:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:44:44,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150546461] [2023-08-27 08:44:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:44,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:44:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:45,444 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 08:44:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:44:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150546461] [2023-08-27 08:44:45,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150546461] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:44:45,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498718094] [2023-08-27 08:44:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:44:45,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:44:45,453 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:44:45,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 08:44:45,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:44:45,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:44:45,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 08:44:45,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:44:45,909 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 08:44:45,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:44:45,979 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:44:45,980 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 24 treesize of output 17 [2023-08-27 08:44:46,426 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 08:44:46,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498718094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:44:46,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:44:46,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 29 [2023-08-27 08:44:46,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678068871] [2023-08-27 08:44:46,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:44:46,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 08:44:46,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:44:46,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 08:44:46,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2023-08-27 08:44:46,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 392 [2023-08-27 08:44:46,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 446 transitions, 6574 flow. Second operand has 31 states, 31 states have (on average 116.58064516129032) internal successors, (3614), 31 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:46,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:44:46,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 392 [2023-08-27 08:44:46,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:44:55,086 INFO L124 PetriNetUnfolderBase]: 16513/31879 cut-off events. [2023-08-27 08:44:55,086 INFO L125 PetriNetUnfolderBase]: For 498215/498215 co-relation queries the response was YES. [2023-08-27 08:44:55,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193195 conditions, 31879 events. 16513/31879 cut-off events. For 498215/498215 co-relation queries the response was YES. Maximal size of possible extension queue 1586. Compared 300199 event pairs, 3984 based on Foata normal form. 178/30855 useless extension candidates. Maximal degree in co-relation 193113. Up to 15369 conditions per place. [2023-08-27 08:44:55,541 INFO L140 encePairwiseOnDemand]: 380/392 looper letters, 697 selfloop transitions, 209 changer transitions 24/930 dead transitions. [2023-08-27 08:44:55,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 930 transitions, 15044 flow [2023-08-27 08:44:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 08:44:55,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 08:44:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 5220 transitions. [2023-08-27 08:44:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3096820123398196 [2023-08-27 08:44:55,546 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 5220 transitions. [2023-08-27 08:44:55,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 5220 transitions. [2023-08-27 08:44:55,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:44:55,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 5220 transitions. [2023-08-27 08:44:55,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 121.3953488372093) internal successors, (5220), 43 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:55,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 392.0) internal successors, (17248), 44 states have internal predecessors, (17248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:55,566 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 392.0) internal successors, (17248), 44 states have internal predecessors, (17248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:55,566 INFO L175 Difference]: Start difference. First operand has 257 places, 446 transitions, 6574 flow. Second operand 43 states and 5220 transitions. [2023-08-27 08:44:55,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 930 transitions, 15044 flow [2023-08-27 08:44:58,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 930 transitions, 14800 flow, removed 1 selfloop flow, removed 17 redundant places. [2023-08-27 08:44:58,442 INFO L231 Difference]: Finished difference. Result has 287 places, 495 transitions, 7680 flow [2023-08-27 08:44:58,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=7680, PETRI_PLACES=287, PETRI_TRANSITIONS=495} [2023-08-27 08:44:58,443 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 249 predicate places. [2023-08-27 08:44:58,443 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 495 transitions, 7680 flow [2023-08-27 08:44:58,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 116.58064516129032) internal successors, (3614), 31 states have internal predecessors, (3614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:58,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:44:58,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:44:58,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-27 08:44:58,644 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,SelfDestructingSolverStorable30 [2023-08-27 08:44:58,644 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:44:58,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:44:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 928982697, now seen corresponding path program 2 times [2023-08-27 08:44:58,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:44:58,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616447301] [2023-08-27 08:44:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:44:58,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:44:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:44:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:44:59,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:44:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616447301] [2023-08-27 08:44:59,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616447301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:44:59,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622984796] [2023-08-27 08:44:59,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:44:59,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:44:59,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:44:59,306 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:44:59,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 08:44:59,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:44:59,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:44:59,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:44:59,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:44:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-27 08:44:59,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:44:59,581 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:44:59,582 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 23 treesize of output 15 [2023-08-27 08:44:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:44:59,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622984796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:44:59,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:44:59,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 3] total 13 [2023-08-27 08:44:59,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46537887] [2023-08-27 08:44:59,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:44:59,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 08:44:59,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:44:59,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 08:44:59,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:44:59,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 392 [2023-08-27 08:44:59,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 495 transitions, 7680 flow. Second operand has 15 states, 15 states have (on average 124.33333333333333) internal successors, (1865), 15 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:44:59,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:44:59,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 392 [2023-08-27 08:44:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:06,405 INFO L124 PetriNetUnfolderBase]: 16061/30843 cut-off events. [2023-08-27 08:45:06,405 INFO L125 PetriNetUnfolderBase]: For 564180/564180 co-relation queries the response was YES. [2023-08-27 08:45:06,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193701 conditions, 30843 events. 16061/30843 cut-off events. For 564180/564180 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 284951 event pairs, 4265 based on Foata normal form. 0/30295 useless extension candidates. Maximal degree in co-relation 193614. Up to 19963 conditions per place. [2023-08-27 08:45:06,877 INFO L140 encePairwiseOnDemand]: 383/392 looper letters, 676 selfloop transitions, 160 changer transitions 8/844 dead transitions. [2023-08-27 08:45:06,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 844 transitions, 14805 flow [2023-08-27 08:45:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:45:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:45:06,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2458 transitions. [2023-08-27 08:45:06,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33002148227712136 [2023-08-27 08:45:06,880 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2458 transitions. [2023-08-27 08:45:06,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2458 transitions. [2023-08-27 08:45:06,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:06,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2458 transitions. [2023-08-27 08:45:06,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 129.3684210526316) internal successors, (2458), 19 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:06,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 392.0) internal successors, (7840), 20 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:06,889 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 392.0) internal successors, (7840), 20 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:06,889 INFO L175 Difference]: Start difference. First operand has 287 places, 495 transitions, 7680 flow. Second operand 19 states and 2458 transitions. [2023-08-27 08:45:06,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 844 transitions, 14805 flow [2023-08-27 08:45:09,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 844 transitions, 13695 flow, removed 341 selfloop flow, removed 23 redundant places. [2023-08-27 08:45:09,852 INFO L231 Difference]: Finished difference. Result has 285 places, 507 transitions, 7630 flow [2023-08-27 08:45:09,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=7066, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7630, PETRI_PLACES=285, PETRI_TRANSITIONS=507} [2023-08-27 08:45:09,852 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 247 predicate places. [2023-08-27 08:45:09,853 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 507 transitions, 7630 flow [2023-08-27 08:45:09,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 124.33333333333333) internal successors, (1865), 15 states have internal predecessors, (1865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:09,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:09,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:09,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-27 08:45:10,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:10,059 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:45:10,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1195254484, now seen corresponding path program 1 times [2023-08-27 08:45:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476236147] [2023-08-27 08:45:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:10,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:11,346 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 08:45:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:11,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476236147] [2023-08-27 08:45:11,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476236147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:11,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563291537] [2023-08-27 08:45:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:11,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:11,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:11,349 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:45:11,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 08:45:11,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:11,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 08:45:11,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:11,720 INFO L322 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2023-08-27 08:45:11,720 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 60 treesize of output 20 [2023-08-27 08:45:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:45:11,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:12,187 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:12,187 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 88 treesize of output 268 [2023-08-27 08:45:28,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:45:28,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563291537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:28,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:28,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-27 08:45:28,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550607060] [2023-08-27 08:45:28,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:28,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:45:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:45:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2023-08-27 08:45:28,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 392 [2023-08-27 08:45:28,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 507 transitions, 7630 flow. Second operand has 25 states, 25 states have (on average 98.12) internal successors, (2453), 25 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:28,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:28,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 392 [2023-08-27 08:45:28,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:37,289 INFO L124 PetriNetUnfolderBase]: 18271/34716 cut-off events. [2023-08-27 08:45:37,289 INFO L125 PetriNetUnfolderBase]: For 680238/680238 co-relation queries the response was YES. [2023-08-27 08:45:37,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226602 conditions, 34716 events. 18271/34716 cut-off events. For 680238/680238 co-relation queries the response was YES. Maximal size of possible extension queue 1672. Compared 322144 event pairs, 3442 based on Foata normal form. 97/34239 useless extension candidates. Maximal degree in co-relation 226514. Up to 23264 conditions per place. [2023-08-27 08:45:38,078 INFO L140 encePairwiseOnDemand]: 375/392 looper letters, 274 selfloop transitions, 548 changer transitions 46/868 dead transitions. [2023-08-27 08:45:38,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 868 transitions, 15024 flow [2023-08-27 08:45:38,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:45:38,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:45:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2341 transitions. [2023-08-27 08:45:38,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2596495119787045 [2023-08-27 08:45:38,081 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2341 transitions. [2023-08-27 08:45:38,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2341 transitions. [2023-08-27 08:45:38,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:38,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2341 transitions. [2023-08-27 08:45:38,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 101.78260869565217) internal successors, (2341), 23 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:38,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:38,090 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:38,090 INFO L175 Difference]: Start difference. First operand has 285 places, 507 transitions, 7630 flow. Second operand 23 states and 2341 transitions. [2023-08-27 08:45:38,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 868 transitions, 15024 flow [2023-08-27 08:45:41,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 868 transitions, 14584 flow, removed 58 selfloop flow, removed 10 redundant places. [2023-08-27 08:45:41,924 INFO L231 Difference]: Finished difference. Result has 309 places, 802 transitions, 14783 flow [2023-08-27 08:45:41,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=7348, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=14783, PETRI_PLACES=309, PETRI_TRANSITIONS=802} [2023-08-27 08:45:41,925 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 271 predicate places. [2023-08-27 08:45:41,925 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 802 transitions, 14783 flow [2023-08-27 08:45:41,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.12) internal successors, (2453), 25 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:41,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:41,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:41,932 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 08:45:42,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:42,126 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:45:42,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:42,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1679957646, now seen corresponding path program 2 times [2023-08-27 08:45:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:42,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744390420] [2023-08-27 08:45:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:42,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:43,145 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 08:45:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744390420] [2023-08-27 08:45:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744390420] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511035262] [2023-08-27 08:45:43,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:45:43,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:43,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:43,146 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:45:43,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 08:45:43,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:45:43,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:43,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-27 08:45:43,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:43,338 INFO L322 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-08-27 08:45:43,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 16 [2023-08-27 08:45:43,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:45:43,466 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 08:45:43,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 14 [2023-08-27 08:45:43,526 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 11 treesize of output 7 [2023-08-27 08:45:43,602 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:45:43,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:45:43,937 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 08:45:43,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:44,195 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n1~0 c_~q1_back~0) (let ((.cse1 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse4 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse2 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (forall ((v_ArrVal_1329 (Array Int Int)) (~q1~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1329))) (let ((.cse0 (select .cse3 ~q1~0.base))) (or (not (= (select .cse0 .cse1) c_~j~0)) (<= (select .cse0 .cse2) (select (select .cse3 c_~q2~0.base) .cse4)))))) (forall ((v_ArrVal_1329 (Array Int Int)) (~q1~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1329))) (let ((.cse5 (select .cse6 ~q1~0.base))) (or (not (= (select .cse5 .cse1) c_~j~0)) (< (select (select .cse6 c_~q2~0.base) .cse4) (+ (select .cse5 .cse2) 1)))))))) (< c_~q1_back~0 0)) is different from false [2023-08-27 08:45:44,577 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:44,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 79 [2023-08-27 08:45:44,653 INFO L322 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-08-27 08:45:44,653 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 1072 treesize of output 1008 [2023-08-27 08:45:44,695 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:44,696 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 438 treesize of output 370 [2023-08-27 08:45:44,748 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:44,748 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 354 treesize of output 374 [2023-08-27 08:46:06,788 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:46:06,788 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 77 [2023-08-27 08:46:06,793 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:46:06,823 INFO L322 Elim1Store]: treesize reduction 69, result has 25.8 percent of original size [2023-08-27 08:46:06,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 306 treesize of output 265 [2023-08-27 08:46:06,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:46:06,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 182 [2023-08-27 08:46:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:46:06,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:46:06,861 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:46:06,861 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 206 treesize of output 174 [2023-08-27 08:46:07,594 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 08:46:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511035262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:46:07,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:46:07,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2023-08-27 08:46:07,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35498368] [2023-08-27 08:46:07,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:46:07,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:46:07,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:46:07,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:46:07,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=809, Unknown=13, NotChecked=58, Total=992 [2023-08-27 08:46:07,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 392 [2023-08-27 08:46:07,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 802 transitions, 14783 flow. Second operand has 32 states, 32 states have (on average 96.65625) internal successors, (3093), 32 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:07,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:46:07,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 392 [2023-08-27 08:46:07,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:46:11,380 WARN L839 $PredicateComparison]: unable to prove that (and (<= c_~i~0 c_~j~0) (< c_~j~0 (+ c_~i~0 1)) (or (let ((.cse3 (+ (* c_~q1_back~0 4) c_~q1~0.offset)) (.cse6 (+ (* c_~q2_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse1 (+ (* c_~q2_back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_1328 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1328))) (or (not (= c_~i~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1))) (forall ((v_ArrVal_1329 (Array Int Int)) (~q1~0.base Int)) (let ((.cse5 (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1329))) (let ((.cse2 (select .cse5 ~q1~0.base))) (or (not (= c_~j~0 (select .cse2 .cse3))) (<= (select .cse2 .cse4) (select (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse6))))))))) (forall ((v_ArrVal_1328 (Array Int Int))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1328))) (or (forall ((v_ArrVal_1329 (Array Int Int)) (~q1~0.base Int)) (let ((.cse8 (store .cse9 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1329))) (let ((.cse7 (select .cse8 ~q1~0.base))) (or (not (= c_~j~0 (select .cse7 .cse3))) (< (select (select .cse8 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse6) (+ (select .cse7 .cse4) 1)))))) (not (= c_~i~0 (select (select .cse9 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) .cse1)))))))) (<= c_~n1~0 c_~q1_back~0) (< c_~q2_back~0 0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (<= c_~n2~0 c_~q2_back~0) (< c_~q1_back~0 0))) is different from false [2023-08-27 08:46:24,942 INFO L124 PetriNetUnfolderBase]: 20548/37900 cut-off events. [2023-08-27 08:46:24,942 INFO L125 PetriNetUnfolderBase]: For 899090/899090 co-relation queries the response was YES. [2023-08-27 08:46:25,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309082 conditions, 37900 events. 20548/37900 cut-off events. For 899090/899090 co-relation queries the response was YES. Maximal size of possible extension queue 1820. Compared 347688 event pairs, 3016 based on Foata normal form. 5/37155 useless extension candidates. Maximal degree in co-relation 308983. Up to 28289 conditions per place. [2023-08-27 08:46:25,727 INFO L140 encePairwiseOnDemand]: 378/392 looper letters, 593 selfloop transitions, 420 changer transitions 59/1072 dead transitions. [2023-08-27 08:46:25,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1072 transitions, 20920 flow [2023-08-27 08:46:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 08:46:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 08:46:25,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3012 transitions. [2023-08-27 08:46:25,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25612244897959185 [2023-08-27 08:46:25,730 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3012 transitions. [2023-08-27 08:46:25,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3012 transitions. [2023-08-27 08:46:25,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:46:25,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3012 transitions. [2023-08-27 08:46:25,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 100.4) internal successors, (3012), 30 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:25,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 392.0) internal successors, (12152), 31 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:25,741 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 392.0) internal successors, (12152), 31 states have internal predecessors, (12152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:25,741 INFO L175 Difference]: Start difference. First operand has 309 places, 802 transitions, 14783 flow. Second operand 30 states and 3012 transitions. [2023-08-27 08:46:25,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1072 transitions, 20920 flow [2023-08-27 08:46:35,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1072 transitions, 19303 flow, removed 751 selfloop flow, removed 11 redundant places. [2023-08-27 08:46:35,756 INFO L231 Difference]: Finished difference. Result has 330 places, 928 transitions, 17167 flow [2023-08-27 08:46:35,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=13565, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17167, PETRI_PLACES=330, PETRI_TRANSITIONS=928} [2023-08-27 08:46:35,757 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 292 predicate places. [2023-08-27 08:46:35,758 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 928 transitions, 17167 flow [2023-08-27 08:46:35,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 96.65625) internal successors, (3093), 32 states have internal predecessors, (3093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:35,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:46:35,758 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:46:35,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-27 08:46:35,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:46:35,964 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:46:35,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:46:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1303588263, now seen corresponding path program 3 times [2023-08-27 08:46:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:46:35,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117020224] [2023-08-27 08:46:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:46:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:46:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:46:38,121 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 08:46:38,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:46:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117020224] [2023-08-27 08:46:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117020224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:46:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466244719] [2023-08-27 08:46:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:46:38,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:46:38,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:46:38,122 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:46:38,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 08:46:38,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:46:38,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:46:38,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:46:38,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:46:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-27 08:46:38,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:46:38,534 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:46:38,534 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 08:46:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-27 08:46:38,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466244719] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:46:38,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:46:38,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5, 5] total 24 [2023-08-27 08:46:38,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842623883] [2023-08-27 08:46:38,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:46:38,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:46:38,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:46:38,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:46:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2023-08-27 08:46:38,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 392 [2023-08-27 08:46:38,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 928 transitions, 17167 flow. Second operand has 26 states, 26 states have (on average 101.5) internal successors, (2639), 26 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:38,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:46:38,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 392 [2023-08-27 08:46:38,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:46:51,286 INFO L124 PetriNetUnfolderBase]: 20201/37412 cut-off events. [2023-08-27 08:46:51,286 INFO L125 PetriNetUnfolderBase]: For 686036/686036 co-relation queries the response was YES. [2023-08-27 08:46:51,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298239 conditions, 37412 events. 20201/37412 cut-off events. For 686036/686036 co-relation queries the response was YES. Maximal size of possible extension queue 1788. Compared 342537 event pairs, 4596 based on Foata normal form. 404/36938 useless extension candidates. Maximal degree in co-relation 298136. Up to 24454 conditions per place. [2023-08-27 08:46:51,970 INFO L140 encePairwiseOnDemand]: 380/392 looper letters, 874 selfloop transitions, 301 changer transitions 6/1181 dead transitions. [2023-08-27 08:46:51,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1181 transitions, 23589 flow [2023-08-27 08:46:51,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:46:51,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:46:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2645 transitions. [2023-08-27 08:46:51,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2698979591836735 [2023-08-27 08:46:51,974 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2645 transitions. [2023-08-27 08:46:51,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2645 transitions. [2023-08-27 08:46:51,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:46:51,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2645 transitions. [2023-08-27 08:46:51,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 105.8) internal successors, (2645), 25 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:51,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 392.0) internal successors, (10192), 26 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:51,983 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 392.0) internal successors, (10192), 26 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:51,983 INFO L175 Difference]: Start difference. First operand has 330 places, 928 transitions, 17167 flow. Second operand 25 states and 2645 transitions. [2023-08-27 08:46:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1181 transitions, 23589 flow [2023-08-27 08:46:59,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1181 transitions, 23230 flow, removed 157 selfloop flow, removed 12 redundant places. [2023-08-27 08:46:59,065 INFO L231 Difference]: Finished difference. Result has 346 places, 964 transitions, 18574 flow [2023-08-27 08:46:59,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=16507, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=18574, PETRI_PLACES=346, PETRI_TRANSITIONS=964} [2023-08-27 08:46:59,066 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 308 predicate places. [2023-08-27 08:46:59,066 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 964 transitions, 18574 flow [2023-08-27 08:46:59,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.5) internal successors, (2639), 26 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:59,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:46:59,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:46:59,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 08:46:59,267 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,SelfDestructingSolverStorable34 [2023-08-27 08:46:59,267 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:46:59,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:46:59,267 INFO L85 PathProgramCache]: Analyzing trace with hash 597315722, now seen corresponding path program 3 times [2023-08-27 08:46:59,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:46:59,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920456293] [2023-08-27 08:46:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:46:59,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:46:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:47:00,792 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 08:47:00,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:47:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920456293] [2023-08-27 08:47:00,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920456293] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:47:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635862221] [2023-08-27 08:47:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:47:00,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:47:00,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:47:00,793 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:47:00,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 08:47:01,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 08:47:01,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:47:01,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-27 08:47:01,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:47:01,095 INFO L322 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-08-27 08:47:01,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 16 [2023-08-27 08:47:01,207 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 08:47:01,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 08:47:01,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-27 08:47:01,556 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:01,557 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 56 treesize of output 38 [2023-08-27 08:47:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:01,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:47:02,226 INFO L322 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-08-27 08:47:02,227 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 204 treesize of output 340 [2023-08-27 08:47:02,259 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:02,259 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 143 treesize of output 166 [2023-08-27 08:47:02,287 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:47:02,287 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 125 treesize of output 148 [2023-08-27 08:47:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:47:23,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635862221] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:47:23,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:47:23,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-08-27 08:47:23,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796270548] [2023-08-27 08:47:23,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:47:23,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:47:23,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:47:23,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:47:23,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=962, Unknown=4, NotChecked=0, Total=1056 [2023-08-27 08:47:23,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 392 [2023-08-27 08:47:23,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 964 transitions, 18574 flow. Second operand has 33 states, 33 states have (on average 96.60606060606061) internal successors, (3188), 33 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:47:23,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:47:23,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 392 [2023-08-27 08:47:23,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:47:37,328 WARN L234 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 125 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:47:49,086 WARN L234 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 123 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:48:01,796 INFO L124 PetriNetUnfolderBase]: 20286/37683 cut-off events. [2023-08-27 08:48:01,803 INFO L125 PetriNetUnfolderBase]: For 687188/687188 co-relation queries the response was YES. [2023-08-27 08:48:02,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303047 conditions, 37683 events. 20286/37683 cut-off events. For 687188/687188 co-relation queries the response was YES. Maximal size of possible extension queue 1784. Compared 346236 event pairs, 3399 based on Foata normal form. 20/36825 useless extension candidates. Maximal degree in co-relation 302938. Up to 25515 conditions per place. [2023-08-27 08:48:02,747 INFO L140 encePairwiseOnDemand]: 375/392 looper letters, 325 selfloop transitions, 705 changer transitions 135/1165 dead transitions. [2023-08-27 08:48:02,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1165 transitions, 23248 flow [2023-08-27 08:48:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 08:48:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 08:48:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3821 transitions. [2023-08-27 08:48:02,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25651181525241673 [2023-08-27 08:48:02,752 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3821 transitions. [2023-08-27 08:48:02,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3821 transitions. [2023-08-27 08:48:02,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:02,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3821 transitions. [2023-08-27 08:48:02,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 100.55263157894737) internal successors, (3821), 38 states have internal predecessors, (3821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:02,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 392.0) internal successors, (15288), 39 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:02,765 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 392.0) internal successors, (15288), 39 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:02,765 INFO L175 Difference]: Start difference. First operand has 346 places, 964 transitions, 18574 flow. Second operand 38 states and 3821 transitions. [2023-08-27 08:48:02,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1165 transitions, 23248 flow [2023-08-27 08:48:10,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1165 transitions, 22986 flow, removed 65 selfloop flow, removed 10 redundant places. [2023-08-27 08:48:10,812 INFO L231 Difference]: Finished difference. Result has 388 places, 967 transitions, 21010 flow [2023-08-27 08:48:10,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=18344, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=964, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=21010, PETRI_PLACES=388, PETRI_TRANSITIONS=967} [2023-08-27 08:48:10,813 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 350 predicate places. [2023-08-27 08:48:10,813 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 967 transitions, 21010 flow [2023-08-27 08:48:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.60606060606061) internal successors, (3188), 33 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:10,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:10,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:10,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-27 08:48:11,014 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,SelfDestructingSolverStorable35 [2023-08-27 08:48:11,014 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:48:11,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 711289488, now seen corresponding path program 4 times [2023-08-27 08:48:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954961679] [2023-08-27 08:48:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:12,132 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 08:48:12,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954961679] [2023-08-27 08:48:12,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954961679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:12,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221391950] [2023-08-27 08:48:12,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:48:12,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:12,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:12,134 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:12,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 08:48:12,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:48:12,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:12,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:48:12,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:48:12,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:48:12,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:48:12,800 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 80 treesize of output 260 [2023-08-27 08:48:15,202 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:48:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221391950] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:48:15,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:48:15,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 23 [2023-08-27 08:48:15,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815739508] [2023-08-27 08:48:15,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:48:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:48:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:48:15,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:48:15,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2023-08-27 08:48:15,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 392 [2023-08-27 08:48:15,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 967 transitions, 21010 flow. Second operand has 25 states, 25 states have (on average 108.08) internal successors, (2702), 25 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:15,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:48:15,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 392 [2023-08-27 08:48:15,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:28,913 INFO L124 PetriNetUnfolderBase]: 20422/37878 cut-off events. [2023-08-27 08:48:28,913 INFO L125 PetriNetUnfolderBase]: For 872932/872932 co-relation queries the response was YES. [2023-08-27 08:48:29,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359153 conditions, 37878 events. 20422/37878 cut-off events. For 872932/872932 co-relation queries the response was YES. Maximal size of possible extension queue 1789. Compared 348195 event pairs, 5089 based on Foata normal form. 16/37016 useless extension candidates. Maximal degree in co-relation 359029. Up to 35909 conditions per place. [2023-08-27 08:48:29,857 INFO L140 encePairwiseOnDemand]: 381/392 looper letters, 876 selfloop transitions, 144 changer transitions 50/1070 dead transitions. [2023-08-27 08:48:29,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1070 transitions, 24586 flow [2023-08-27 08:48:29,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:48:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:48:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2230 transitions. [2023-08-27 08:48:29,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2844387755102041 [2023-08-27 08:48:29,860 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2230 transitions. [2023-08-27 08:48:29,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2230 transitions. [2023-08-27 08:48:29,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:29,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2230 transitions. [2023-08-27 08:48:29,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.5) internal successors, (2230), 20 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 08:48:29,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 392.0) internal successors, (8232), 21 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:29,869 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 392.0) internal successors, (8232), 21 states have internal predecessors, (8232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:29,870 INFO L175 Difference]: Start difference. First operand has 388 places, 967 transitions, 21010 flow. Second operand 20 states and 2230 transitions. [2023-08-27 08:48:29,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1070 transitions, 24586 flow [2023-08-27 08:48:44,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1070 transitions, 23387 flow, removed 116 selfloop flow, removed 24 redundant places. [2023-08-27 08:48:44,198 INFO L231 Difference]: Finished difference. Result has 368 places, 981 transitions, 20632 flow [2023-08-27 08:48:44,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=19953, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=20632, PETRI_PLACES=368, PETRI_TRANSITIONS=981} [2023-08-27 08:48:44,199 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 330 predicate places. [2023-08-27 08:48:44,199 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 981 transitions, 20632 flow [2023-08-27 08:48:44,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 108.08) internal successors, (2702), 25 states have internal predecessors, (2702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:44,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:48:44,200 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:48:44,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 08:48:44,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:44,400 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:48:44,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:48:44,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1316035442, now seen corresponding path program 3 times [2023-08-27 08:48:44,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:48:44,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183596549] [2023-08-27 08:48:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:48:44,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:48:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:48:45,944 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 08:48:45,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:48:45,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183596549] [2023-08-27 08:48:45,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183596549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:48:45,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454215495] [2023-08-27 08:48:45,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:48:45,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:48:45,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:48:45,946 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:48:45,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 08:48:46,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 08:48:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:48:46,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 08:48:46,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:48:46,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 08:48:46,417 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 08:48:46,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-08-27 08:48:46,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:48:46,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-27 08:48:46,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:48:46,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 35 [2023-08-27 08:48:52,924 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:48:59,046 WARN L234 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:48:59,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:48:59,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:49:00,141 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-27 08:49:00,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 84 [2023-08-27 08:49:00,210 INFO L322 Elim1Store]: treesize reduction 4, result has 95.9 percent of original size [2023-08-27 08:49:00,211 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 550 treesize of output 557 [2023-08-27 08:49:00,241 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:49:00,242 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 456 treesize of output 380 [2023-08-27 08:49:00,275 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:49:00,276 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 313 treesize of output 296 [2023-08-27 08:49:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:49:08,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454215495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:49:08,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:49:08,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 12] total 42 [2023-08-27 08:49:08,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695576279] [2023-08-27 08:49:08,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:49:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 08:49:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:49:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 08:49:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1740, Unknown=3, NotChecked=0, Total=1892 [2023-08-27 08:49:08,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 392 [2023-08-27 08:49:08,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 981 transitions, 20632 flow. Second operand has 44 states, 44 states have (on average 101.20454545454545) internal successors, (4453), 44 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:08,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:49:08,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 392 [2023-08-27 08:49:08,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:49:27,547 WARN L234 SmtUtils]: Spent 16.31s on a formula simplification. DAG size of input: 115 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:49:29,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 08:49:36,564 WARN L234 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 114 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:49:56,879 WARN L234 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 71 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:49:59,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:00,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:02,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:14,657 WARN L234 SmtUtils]: Spent 12.09s on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:50:20,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 08:50:23,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:25,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:27,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:38,538 WARN L234 SmtUtils]: Spent 10.25s on a formula simplification. DAG size of input: 111 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:50:43,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:50:44,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 08:50:49,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 08:50:54,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 08:51:06,684 WARN L234 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 116 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:51:08,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-27 08:51:11,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:14,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 08:51:16,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:20,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:22,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 08:51:27,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:29,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:31,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:33,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 08:51:35,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:37,749 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:40,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:51:50,787 INFO L124 PetriNetUnfolderBase]: 21144/39253 cut-off events. [2023-08-27 08:51:50,787 INFO L125 PetriNetUnfolderBase]: For 828474/828474 co-relation queries the response was YES. [2023-08-27 08:51:51,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340815 conditions, 39253 events. 21144/39253 cut-off events. For 828474/828474 co-relation queries the response was YES. Maximal size of possible extension queue 1827. Compared 363447 event pairs, 3075 based on Foata normal form. 44/38419 useless extension candidates. Maximal degree in co-relation 340711. Up to 27520 conditions per place. [2023-08-27 08:51:51,675 INFO L140 encePairwiseOnDemand]: 378/392 looper letters, 662 selfloop transitions, 728 changer transitions 70/1460 dead transitions. [2023-08-27 08:51:51,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1460 transitions, 31121 flow [2023-08-27 08:51:51,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-27 08:51:51,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-27 08:51:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 8376 transitions. [2023-08-27 08:51:51,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2670918367346939 [2023-08-27 08:51:51,684 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 8376 transitions. [2023-08-27 08:51:51,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 8376 transitions. [2023-08-27 08:51:51,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:51:51,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 8376 transitions. [2023-08-27 08:51:51,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 104.7) internal successors, (8376), 80 states have internal predecessors, (8376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:51,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 392.0) internal successors, (31752), 81 states have internal predecessors, (31752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:51,716 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 392.0) internal successors, (31752), 81 states have internal predecessors, (31752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:51:51,716 INFO L175 Difference]: Start difference. First operand has 368 places, 981 transitions, 20632 flow. Second operand 80 states and 8376 transitions. [2023-08-27 08:51:51,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1460 transitions, 31121 flow [2023-08-27 08:52:00,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1460 transitions, 30564 flow, removed 123 selfloop flow, removed 18 redundant places. [2023-08-27 08:52:00,710 INFO L231 Difference]: Finished difference. Result has 446 places, 1220 transitions, 27875 flow [2023-08-27 08:52:00,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=20332, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=523, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=27875, PETRI_PLACES=446, PETRI_TRANSITIONS=1220} [2023-08-27 08:52:00,711 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 408 predicate places. [2023-08-27 08:52:00,711 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1220 transitions, 27875 flow [2023-08-27 08:52:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 101.20454545454545) internal successors, (4453), 44 states have internal predecessors, (4453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:52:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:52:00,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 08:52:00,912 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,SelfDestructingSolverStorable37 [2023-08-27 08:52:00,913 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:52:00,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:52:00,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1992261581, now seen corresponding path program 4 times [2023-08-27 08:52:00,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:52:00,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374111096] [2023-08-27 08:52:00,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:52:00,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:52:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:52:03,119 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 08:52:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:52:03,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374111096] [2023-08-27 08:52:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374111096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:52:03,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929063059] [2023-08-27 08:52:03,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:52:03,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:52:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:52:03,121 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:52:03,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 08:52:03,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:52:03,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:52:03,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 08:52:03,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:52:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:52:03,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:52:03,594 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:52:03,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:52:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-27 08:52:03,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929063059] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:52:03,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:52:03,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 5] total 27 [2023-08-27 08:52:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145642518] [2023-08-27 08:52:03,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:52:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:52:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:52:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:52:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=742, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:52:03,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 392 [2023-08-27 08:52:03,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1220 transitions, 27875 flow. Second operand has 29 states, 29 states have (on average 106.48275862068965) internal successors, (3088), 29 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:03,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:52:03,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 392 [2023-08-27 08:52:03,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:52:22,553 INFO L124 PetriNetUnfolderBase]: 24211/44502 cut-off events. [2023-08-27 08:52:22,553 INFO L125 PetriNetUnfolderBase]: For 1040862/1040862 co-relation queries the response was YES. [2023-08-27 08:52:23,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406878 conditions, 44502 events. 24211/44502 cut-off events. For 1040862/1040862 co-relation queries the response was YES. Maximal size of possible extension queue 1981. Compared 413792 event pairs, 6092 based on Foata normal form. 278/43834 useless extension candidates. Maximal degree in co-relation 406759. Up to 24869 conditions per place. [2023-08-27 08:52:23,853 INFO L140 encePairwiseOnDemand]: 379/392 looper letters, 1028 selfloop transitions, 554 changer transitions 6/1588 dead transitions. [2023-08-27 08:52:23,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 1588 transitions, 38586 flow [2023-08-27 08:52:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:52:23,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:52:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2760 transitions. [2023-08-27 08:52:23,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2816326530612245 [2023-08-27 08:52:23,857 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2760 transitions. [2023-08-27 08:52:23,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2760 transitions. [2023-08-27 08:52:23,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:52:23,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2760 transitions. [2023-08-27 08:52:23,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 110.4) internal successors, (2760), 25 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:23,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 392.0) internal successors, (10192), 26 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:23,864 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 392.0) internal successors, (10192), 26 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:23,864 INFO L175 Difference]: Start difference. First operand has 446 places, 1220 transitions, 27875 flow. Second operand 25 states and 2760 transitions. [2023-08-27 08:52:23,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 1588 transitions, 38586 flow [2023-08-27 08:52:37,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 1588 transitions, 37923 flow, removed 262 selfloop flow, removed 14 redundant places. [2023-08-27 08:52:37,677 INFO L231 Difference]: Finished difference. Result has 459 places, 1310 transitions, 30978 flow [2023-08-27 08:52:37,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=27148, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=30978, PETRI_PLACES=459, PETRI_TRANSITIONS=1310} [2023-08-27 08:52:37,679 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 421 predicate places. [2023-08-27 08:52:37,679 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1310 transitions, 30978 flow [2023-08-27 08:52:37,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 106.48275862068965) internal successors, (3088), 29 states have internal predecessors, (3088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:37,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:52:37,680 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:52:37,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 08:52:37,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 08:52:37,885 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:52:37,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:52:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash -162599150, now seen corresponding path program 3 times [2023-08-27 08:52:37,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:52:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688038711] [2023-08-27 08:52:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:52:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:52:37,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:52:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:52:38,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:52:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688038711] [2023-08-27 08:52:38,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688038711] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:52:38,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941706979] [2023-08-27 08:52:38,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:52:38,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:52:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:52:38,008 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:52:38,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 08:52:38,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:52:38,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:52:38,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 08:52:38,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:52:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-27 08:52:38,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:52:38,583 INFO L322 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2023-08-27 08:52:38,584 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 34 treesize of output 29 [2023-08-27 08:52:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-27 08:52:38,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941706979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:52:38,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:52:38,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 08:52:38,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746511469] [2023-08-27 08:52:38,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:52:38,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:52:38,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:52:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:52:38,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-08-27 08:52:38,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 392 [2023-08-27 08:52:38,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1310 transitions, 30978 flow. Second operand has 24 states, 24 states have (on average 119.16666666666667) internal successors, (2860), 24 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:38,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:52:38,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 392 [2023-08-27 08:52:38,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:52:49,208 INFO L124 PetriNetUnfolderBase]: 11152/21278 cut-off events. [2023-08-27 08:52:49,209 INFO L125 PetriNetUnfolderBase]: For 593104/593104 co-relation queries the response was YES. [2023-08-27 08:52:49,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196115 conditions, 21278 events. 11152/21278 cut-off events. For 593104/593104 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 185541 event pairs, 2715 based on Foata normal form. 570/21808 useless extension candidates. Maximal degree in co-relation 195994. Up to 8681 conditions per place. [2023-08-27 08:52:49,545 INFO L140 encePairwiseOnDemand]: 382/392 looper letters, 991 selfloop transitions, 387 changer transitions 80/1458 dead transitions. [2023-08-27 08:52:49,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1458 transitions, 34706 flow [2023-08-27 08:52:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 08:52:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 08:52:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 5852 transitions. [2023-08-27 08:52:49,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31762917933130697 [2023-08-27 08:52:49,551 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 5852 transitions. [2023-08-27 08:52:49,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 5852 transitions. [2023-08-27 08:52:49,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:52:49,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 5852 transitions. [2023-08-27 08:52:49,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 124.51063829787235) internal successors, (5852), 47 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:49,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 392.0) internal successors, (18816), 48 states have internal predecessors, (18816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:49,564 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 392.0) internal successors, (18816), 48 states have internal predecessors, (18816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:49,564 INFO L175 Difference]: Start difference. First operand has 459 places, 1310 transitions, 30978 flow. Second operand 47 states and 5852 transitions. [2023-08-27 08:52:49,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1458 transitions, 34706 flow [2023-08-27 08:52:55,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1458 transitions, 32695 flow, removed 554 selfloop flow, removed 43 redundant places. [2023-08-27 08:52:55,550 INFO L231 Difference]: Finished difference. Result has 450 places, 956 transitions, 23057 flow [2023-08-27 08:52:55,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=21396, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=23057, PETRI_PLACES=450, PETRI_TRANSITIONS=956} [2023-08-27 08:52:55,551 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 412 predicate places. [2023-08-27 08:52:55,552 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 956 transitions, 23057 flow [2023-08-27 08:52:55,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 119.16666666666667) internal successors, (2860), 24 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:55,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:52:55,552 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:52:55,557 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 08:52:55,753 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,SelfDestructingSolverStorable39 [2023-08-27 08:52:55,753 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:52:55,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:52:55,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1612592196, now seen corresponding path program 4 times [2023-08-27 08:52:55,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:52:55,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86713234] [2023-08-27 08:52:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:52:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:52:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:52:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:52:56,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:52:56,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86713234] [2023-08-27 08:52:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86713234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:52:56,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68364837] [2023-08-27 08:52:56,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:52:56,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:52:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:52:56,672 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:52:56,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 08:52:56,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:52:56,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:52:56,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:52:56,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:52:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:52:57,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:52:57,113 INFO L322 Elim1Store]: treesize reduction 13, result has 74.0 percent of original size [2023-08-27 08:52:57,114 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 49 treesize of output 52 [2023-08-27 08:52:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-27 08:52:57,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68364837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:52:57,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:52:57,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 20 [2023-08-27 08:52:57,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820788627] [2023-08-27 08:52:57,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:52:57,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:52:57,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:52:57,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:52:57,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-08-27 08:52:57,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 392 [2023-08-27 08:52:57,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 956 transitions, 23057 flow. Second operand has 22 states, 22 states have (on average 123.86363636363636) internal successors, (2725), 22 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:52:57,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:52:57,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 392 [2023-08-27 08:52:57,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:53:08,112 INFO L124 PetriNetUnfolderBase]: 11792/22532 cut-off events. [2023-08-27 08:53:08,112 INFO L125 PetriNetUnfolderBase]: For 473063/473063 co-relation queries the response was YES. [2023-08-27 08:53:08,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191257 conditions, 22532 events. 11792/22532 cut-off events. For 473063/473063 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 197477 event pairs, 2325 based on Foata normal form. 318/22810 useless extension candidates. Maximal degree in co-relation 191158. Up to 11028 conditions per place. [2023-08-27 08:53:08,607 INFO L140 encePairwiseOnDemand]: 381/392 looper letters, 878 selfloop transitions, 533 changer transitions 70/1481 dead transitions. [2023-08-27 08:53:08,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1481 transitions, 36851 flow [2023-08-27 08:53:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 08:53:08,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 08:53:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4741 transitions. [2023-08-27 08:53:08,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268753447324876 [2023-08-27 08:53:08,610 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4741 transitions. [2023-08-27 08:53:08,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4741 transitions. [2023-08-27 08:53:08,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:53:08,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4741 transitions. [2023-08-27 08:53:08,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 128.13513513513513) internal successors, (4741), 37 states have internal predecessors, (4741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:08,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 392.0) internal successors, (14896), 38 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:08,624 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 392.0) internal successors, (14896), 38 states have internal predecessors, (14896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:08,624 INFO L175 Difference]: Start difference. First operand has 450 places, 956 transitions, 23057 flow. Second operand 37 states and 4741 transitions. [2023-08-27 08:53:08,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1481 transitions, 36851 flow [2023-08-27 08:53:12,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1481 transitions, 35902 flow, removed 302 selfloop flow, removed 30 redundant places. [2023-08-27 08:53:12,706 INFO L231 Difference]: Finished difference. Result has 455 places, 1055 transitions, 26127 flow [2023-08-27 08:53:12,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=22077, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=26127, PETRI_PLACES=455, PETRI_TRANSITIONS=1055} [2023-08-27 08:53:12,707 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 417 predicate places. [2023-08-27 08:53:12,707 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 1055 transitions, 26127 flow [2023-08-27 08:53:12,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 123.86363636363636) internal successors, (2725), 22 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:12,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:53:12,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:53:12,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-27 08:53:12,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:12,908 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:53:12,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:53:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1774297477, now seen corresponding path program 3 times [2023-08-27 08:53:12,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:53:12,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600797677] [2023-08-27 08:53:12,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:53:12,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:53:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:53:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:53:13,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:53:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600797677] [2023-08-27 08:53:13,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600797677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:53:13,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516556884] [2023-08-27 08:53:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:53:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:53:13,015 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:53:13,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 08:53:13,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:53:13,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:53:13,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:53:13,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:53:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-27 08:53:13,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:53:13,474 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:53:13,475 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 23 treesize of output 15 [2023-08-27 08:53:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-27 08:53:13,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516556884] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:53:13,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:53:13,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2023-08-27 08:53:13,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956559811] [2023-08-27 08:53:13,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:53:13,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:53:13,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:53:13,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:53:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:53:13,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 392 [2023-08-27 08:53:13,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 1055 transitions, 26127 flow. Second operand has 20 states, 20 states have (on average 119.65) internal successors, (2393), 20 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:13,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:53:13,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 392 [2023-08-27 08:53:13,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:53:19,484 INFO L124 PetriNetUnfolderBase]: 8646/16726 cut-off events. [2023-08-27 08:53:19,485 INFO L125 PetriNetUnfolderBase]: For 389346/389346 co-relation queries the response was YES. [2023-08-27 08:53:19,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144624 conditions, 16726 events. 8646/16726 cut-off events. For 389346/389346 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 141763 event pairs, 4133 based on Foata normal form. 284/17010 useless extension candidates. Maximal degree in co-relation 144536. Up to 10065 conditions per place. [2023-08-27 08:53:19,683 INFO L140 encePairwiseOnDemand]: 383/392 looper letters, 894 selfloop transitions, 152 changer transitions 53/1099 dead transitions. [2023-08-27 08:53:19,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 1099 transitions, 27802 flow [2023-08-27 08:53:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:53:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:53:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2961 transitions. [2023-08-27 08:53:19,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31473214285714285 [2023-08-27 08:53:19,685 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2961 transitions. [2023-08-27 08:53:19,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2961 transitions. [2023-08-27 08:53:19,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:53:19,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2961 transitions. [2023-08-27 08:53:19,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 123.375) internal successors, (2961), 24 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:19,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 392.0) internal successors, (9800), 25 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:19,692 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 392.0) internal successors, (9800), 25 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:19,692 INFO L175 Difference]: Start difference. First operand has 455 places, 1055 transitions, 26127 flow. Second operand 24 states and 2961 transitions. [2023-08-27 08:53:19,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 1099 transitions, 27802 flow [2023-08-27 08:53:22,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1099 transitions, 26976 flow, removed 211 selfloop flow, removed 24 redundant places. [2023-08-27 08:53:22,083 INFO L231 Difference]: Finished difference. Result has 438 places, 875 transitions, 21326 flow [2023-08-27 08:53:22,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=21342, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=889, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=21326, PETRI_PLACES=438, PETRI_TRANSITIONS=875} [2023-08-27 08:53:22,084 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 400 predicate places. [2023-08-27 08:53:22,084 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 875 transitions, 21326 flow [2023-08-27 08:53:22,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 119.65) internal successors, (2393), 20 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:22,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:53:22,085 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:53:22,093 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 08:53:22,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:22,291 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:53:22,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:53:22,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1615273386, now seen corresponding path program 5 times [2023-08-27 08:53:22,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:53:22,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56978588] [2023-08-27 08:53:22,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:53:22,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:53:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:53:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:53:23,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:53:23,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56978588] [2023-08-27 08:53:23,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56978588] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:53:23,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570474400] [2023-08-27 08:53:23,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:53:23,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:23,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:53:23,280 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:53:23,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 08:53:23,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:53:23,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:53:23,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 08:53:23,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:53:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-27 08:53:23,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:53:23,729 INFO L322 Elim1Store]: treesize reduction 13, result has 74.0 percent of original size [2023-08-27 08:53:23,729 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 49 treesize of output 52 [2023-08-27 08:53:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-27 08:53:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570474400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:53:23,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:53:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 20 [2023-08-27 08:53:23,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879554887] [2023-08-27 08:53:23,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:53:23,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:53:23,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:53:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:53:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2023-08-27 08:53:23,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 392 [2023-08-27 08:53:23,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 875 transitions, 21326 flow. Second operand has 22 states, 22 states have (on average 123.86363636363636) internal successors, (2725), 22 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:23,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:53:23,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 392 [2023-08-27 08:53:23,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:53:29,199 INFO L124 PetriNetUnfolderBase]: 8583/16711 cut-off events. [2023-08-27 08:53:29,199 INFO L125 PetriNetUnfolderBase]: For 335012/335012 co-relation queries the response was YES. [2023-08-27 08:53:29,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140061 conditions, 16711 events. 8583/16711 cut-off events. For 335012/335012 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 142598 event pairs, 1761 based on Foata normal form. 112/16823 useless extension candidates. Maximal degree in co-relation 139978. Up to 5587 conditions per place. [2023-08-27 08:53:29,368 INFO L140 encePairwiseOnDemand]: 382/392 looper letters, 563 selfloop transitions, 475 changer transitions 14/1052 dead transitions. [2023-08-27 08:53:29,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1052 transitions, 26684 flow [2023-08-27 08:53:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:53:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:53:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2943 transitions. [2023-08-27 08:53:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3264196983141083 [2023-08-27 08:53:29,370 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2943 transitions. [2023-08-27 08:53:29,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2943 transitions. [2023-08-27 08:53:29,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:53:29,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2943 transitions. [2023-08-27 08:53:29,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 127.95652173913044) internal successors, (2943), 23 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:29,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:29,377 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 392.0) internal successors, (9408), 24 states have internal predecessors, (9408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:29,377 INFO L175 Difference]: Start difference. First operand has 438 places, 875 transitions, 21326 flow. Second operand 23 states and 2943 transitions. [2023-08-27 08:53:29,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1052 transitions, 26684 flow [2023-08-27 08:53:31,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1052 transitions, 26365 flow, removed 100 selfloop flow, removed 17 redundant places. [2023-08-27 08:53:31,950 INFO L231 Difference]: Finished difference. Result has 440 places, 881 transitions, 22406 flow [2023-08-27 08:53:31,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=20862, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=456, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=22406, PETRI_PLACES=440, PETRI_TRANSITIONS=881} [2023-08-27 08:53:31,951 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 402 predicate places. [2023-08-27 08:53:31,951 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 881 transitions, 22406 flow [2023-08-27 08:53:31,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 123.86363636363636) internal successors, (2725), 22 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:53:31,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:53:31,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:53:31,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-27 08:53:32,152 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,SelfDestructingSolverStorable42 [2023-08-27 08:53:32,152 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-08-27 08:53:32,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:53:32,153 INFO L85 PathProgramCache]: Analyzing trace with hash 710342928, now seen corresponding path program 5 times [2023-08-27 08:53:32,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:53:32,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667136235] [2023-08-27 08:53:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:53:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:53:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:53:33,222 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 08:53:33,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:53:33,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667136235] [2023-08-27 08:53:33,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667136235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:53:33,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487343208] [2023-08-27 08:53:33,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:53:33,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:53:33,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:53:33,223 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:53:33,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 08:53:33,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:53:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:53:33,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 08:53:33,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:53:33,824 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:53:33,838 INFO L322 Elim1Store]: treesize reduction 77, result has 8.3 percent of original size [2023-08-27 08:53:33,838 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 54 treesize of output 26 [2023-08-27 08:53:33,921 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 08:53:33,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:53:34,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:53:34,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 130 treesize of output 386 [2023-08-27 08:54:29,130 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:54:34,672 WARN L234 SmtUtils]: Spent 5.42s on a formula simplification. DAG size of input: 202 DAG size of output: 167 (called from [L 183] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne) Received shutdown request... [2023-08-27 08:55:58,118 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:55:58,118 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:55:58,125 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-27 08:55:58,127 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (30 of 31 remaining) [2023-08-27 08:55:58,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-27 08:55:58,328 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,SelfDestructingSolverStorable43 [2023-08-27 08:55:58,328 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 31 remaining) [2023-08-27 08:55:58,330 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (13 of 31 remaining) [2023-08-27 08:55:58,331 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 31 remaining) [2023-08-27 08:55:58,332 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 31 remaining) [2023-08-27 08:55:58,333 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 31 remaining) [2023-08-27 08:55:58,333 INFO L445 BasicCegarLoop]: Path program histogram: [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:55:58,337 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 08:55:58,337 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 08:55:58,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 08:55:58 BasicIcfg [2023-08-27 08:55:58,339 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 08:55:58,339 INFO L158 Benchmark]: Toolchain (without parser) took 784122.93ms. Allocated memory was 339.7MB in the beginning and 11.3GB in the end (delta: 11.0GB). Free memory was 316.3MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-08-27 08:55:58,339 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 339.7MB. Free memory was 316.8MB in the beginning and 316.7MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 08:55:58,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.23ms. Allocated memory is still 339.7MB. Free memory was 316.0MB in the beginning and 304.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 08:55:58,340 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.18ms. Allocated memory is still 339.7MB. Free memory was 304.5MB in the beginning and 302.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:55:58,340 INFO L158 Benchmark]: Boogie Preprocessor took 52.78ms. Allocated memory is still 339.7MB. Free memory was 302.3MB in the beginning and 300.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:55:58,340 INFO L158 Benchmark]: RCFGBuilder took 711.48ms. Allocated memory is still 339.7MB. Free memory was 300.3MB in the beginning and 312.1MB in the end (delta: -11.8MB). Peak memory consumption was 39.4MB. Max. memory is 16.0GB. [2023-08-27 08:55:58,340 INFO L158 Benchmark]: TraceAbstraction took 782999.77ms. Allocated memory was 339.7MB in the beginning and 11.3GB in the end (delta: 11.0GB). Free memory was 311.0MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. [2023-08-27 08:55:58,341 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 339.7MB. Free memory was 316.8MB in the beginning and 316.7MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 293.23ms. Allocated memory is still 339.7MB. Free memory was 316.0MB in the beginning and 304.5MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.18ms. Allocated memory is still 339.7MB. Free memory was 304.5MB in the beginning and 302.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 52.78ms. Allocated memory is still 339.7MB. Free memory was 302.3MB in the beginning and 300.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 711.48ms. Allocated memory is still 339.7MB. Free memory was 300.3MB in the beginning and 312.1MB in the end (delta: -11.8MB). Peak memory consumption was 39.4MB. Max. memory is 16.0GB. * TraceAbstraction took 782999.77ms. Allocated memory was 339.7MB in the beginning and 11.3GB in the end (delta: 11.0GB). Free memory was 311.0MB in the beginning and 4.9GB in the end (delta: -4.6GB). Peak memory consumption was 8.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.7s, 180 PlacesBefore, 38 PlacesAfterwards, 186 TransitionsBefore, 35 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 8 FixpointIterations, 131 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 195 TotalNumberOfCompositions, 3556 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2195, independent: 2023, independent conditional: 0, independent unconditional: 2023, dependent: 172, dependent conditional: 0, dependent unconditional: 172, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 669, independent: 642, independent conditional: 0, independent unconditional: 642, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2195, independent: 1381, independent conditional: 0, independent unconditional: 1381, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 669, unknown conditional: 0, unknown unconditional: 669] , Statistics on independence cache: Total cache size (in pairs): 111, Positive cache size: 100, Positive conditional cache size: 0, Positive unconditional cache size: 100, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, 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 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 56]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 112]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 97]: 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 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - TimeoutResultAtElement [Line: 96]: 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 20 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 11 for 41ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 221 locations, 31 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: 782.9s, OverallIterations: 44, TraceHistogramMax: 10, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 486.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.8s, HoareTripleCheckerStatistics: 260 mSolverCounterUnknown, 6105 SdHoareTripleChecker+Valid, 77.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6105 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 75.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 360 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26746 IncrementalHoareTripleChecker+Invalid, 28573 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1207 mSolverCounterUnsat, 0 mSDtfsCounter, 26746 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1755 GetRequests, 573 SyntacticMatches, 14 SemanticMatches, 1168 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 11192 ImplicationChecksByTransitivity, 197.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30978occurred in iteration=39, InterpolantAutomatonStates: 749, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 129.4s InterpolantComputationTime, 1122 NumberOfCodeBlocks, 1088 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 1443 ConstructedInterpolants, 161 QuantifiedInterpolants, 32133 SizeOfPredicates, 333 NumberOfNonLiveVariables, 8908 ConjunctsInSsa, 875 ConjunctsInUnsatCore, 108 InterpolantComputations, 18 PerfectInterpolantSequences, 398/918 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