/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 -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-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:54:36,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:54:36,702 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 01:54:36,709 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:54:36,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:54:36,736 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:54:36,736 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:54:36,740 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:54:36,740 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:54:36,743 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:54:36,743 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:54:36,743 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:54:36,744 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:54:36,744 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:54:36,744 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:54:36,744 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:54:36,745 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:54:36,745 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:54:36,745 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:54:36,745 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:54:36,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:54:36,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:54:36,747 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:54:36,747 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:54:36,747 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:54:36,747 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:54:36,748 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:54:36,748 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:54:36,748 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:54:36,748 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:54:36,749 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:54:36,749 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:54:36,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:54:36,749 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:54:36,749 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:54:36,750 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:54:37,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:54:37,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:54:37,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:54:37,014 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:54:37,015 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:54:37,015 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-27 01:54:38,013 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:54:38,250 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:54:38,250 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-27 01:54:38,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3dcc70a/411c5f84719b4550b53db3f2ff69f123/FLAG0373d3472 [2023-08-27 01:54:38,290 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df3dcc70a/411c5f84719b4550b53db3f2ff69f123 [2023-08-27 01:54:38,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:54:38,295 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:54:38,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:54:38,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:54:38,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:54:38,308 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,309 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38, skipping insertion in model container [2023-08-27 01:54:38,309 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,328 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:54:38,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:54:38,465 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:54:38,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:54:38,499 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:54:38,500 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:54:38,504 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:54:38,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38 WrapperNode [2023-08-27 01:54:38,504 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:54:38,506 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:54:38,506 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:54:38,506 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:54:38,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,521 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,543 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2023-08-27 01:54:38,543 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:54:38,544 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:54:38,544 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:54:38,544 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:54:38,549 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,550 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,568 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,571 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:54:38,572 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:54:38,572 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:54:38,572 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:54:38,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (1/1) ... [2023-08-27 01:54:38,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:54:38,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:38,595 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 01:54:38,625 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 01:54:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:54:38,647 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:54:38,647 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:54:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:54:38,648 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:54:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:54:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:54:38,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:54:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:54:38,650 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 01:54:38,744 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:54:38,748 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:54:39,009 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:54:39,116 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:54:39,117 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 01:54:39,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:54:39 BoogieIcfgContainer [2023-08-27 01:54:39,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:54:39,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:54:39,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:54:39,123 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:54:39,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:54:38" (1/3) ... [2023-08-27 01:54:39,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f16731e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:54:39, skipping insertion in model container [2023-08-27 01:54:39,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:54:38" (2/3) ... [2023-08-27 01:54:39,124 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f16731e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:54:39, skipping insertion in model container [2023-08-27 01:54:39,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:54:39" (3/3) ... [2023-08-27 01:54:39,125 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-08-27 01:54:39,136 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:54:39,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-27 01:54:39,136 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:54:39,193 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 01:54:39,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 125 transitions, 266 flow [2023-08-27 01:54:39,276 INFO L124 PetriNetUnfolderBase]: 9/123 cut-off events. [2023-08-27 01:54:39,277 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:54:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 123 events. 9/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-27 01:54:39,281 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 125 transitions, 266 flow [2023-08-27 01:54:39,284 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 114 transitions, 240 flow [2023-08-27 01:54:39,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:54:39,295 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 114 transitions, 240 flow [2023-08-27 01:54:39,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 114 transitions, 240 flow [2023-08-27 01:54:39,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 114 transitions, 240 flow [2023-08-27 01:54:39,326 INFO L124 PetriNetUnfolderBase]: 9/114 cut-off events. [2023-08-27 01:54:39,326 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:54:39,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-27 01:54:39,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-27 01:54:43,192 INFO L134 LiptonReduction]: Checked pairs total: 719 [2023-08-27 01:54:43,192 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-27 01:54:43,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:54:43,210 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;@2d789745, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:54:43,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-27 01:54:43,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:54:43,212 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 01:54:43,212 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 01:54:43,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:43,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 01:54:43,213 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:43,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:43,222 INFO L85 PathProgramCache]: Analyzing trace with hash 17734, now seen corresponding path program 1 times [2023-08-27 01:54:43,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:43,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124355054] [2023-08-27 01:54:43,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:43,475 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 01:54:43,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:43,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124355054] [2023-08-27 01:54:43,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124355054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:43,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:54:43,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:54:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500195777] [2023-08-27 01:54:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:43,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:54:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:54:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:54:43,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2023-08-27 01:54:43,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:43,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2023-08-27 01:54:43,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:43,569 INFO L124 PetriNetUnfolderBase]: 42/79 cut-off events. [2023-08-27 01:54:43,569 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 01:54:43,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 79 events. 42/79 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 24 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 120. Up to 79 conditions per place. [2023-08-27 01:54:43,571 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 18 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-27 01:54:43,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 96 flow [2023-08-27 01:54:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:54:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:54:43,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-27 01:54:43,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281949934123847 [2023-08-27 01:54:43,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-27 01:54:43,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-27 01:54:43,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:43,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-27 01:54:43,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,595 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,596 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 325 transitions. [2023-08-27 01:54:43,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 96 flow [2023-08-27 01:54:43,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 01:54:43,599 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 63 flow [2023-08-27 01:54:43,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-08-27 01:54:43,602 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-08-27 01:54:43,603 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 63 flow [2023-08-27 01:54:43,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:43,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:54:43,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:54:43,606 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:43,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:43,607 INFO L85 PathProgramCache]: Analyzing trace with hash 550853, now seen corresponding path program 1 times [2023-08-27 01:54:43,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:43,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735554300] [2023-08-27 01:54:43,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:43,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:43,666 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 01:54:43,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735554300] [2023-08-27 01:54:43,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735554300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:43,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108614618] [2023-08-27 01:54:43,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:43,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:43,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:43,675 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 01:54:43,736 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 01:54:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:43,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:54:43,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:43,803 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 01:54:43,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:43,814 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 01:54:43,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108614618] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:43,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:43,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 01:54:43,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925179680] [2023-08-27 01:54:43,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:43,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:54:43,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:43,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:54:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:54:43,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2023-08-27 01:54:43,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 63 flow. Second operand has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:43,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2023-08-27 01:54:43,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:43,892 INFO L124 PetriNetUnfolderBase]: 48/88 cut-off events. [2023-08-27 01:54:43,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 01:54:43,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 88 events. 48/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 172 event pairs, 24 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 148. Up to 81 conditions per place. [2023-08-27 01:54:43,893 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 17 selfloop transitions, 13 changer transitions 0/30 dead transitions. [2023-08-27 01:54:43,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 159 flow [2023-08-27 01:54:43,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:54:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:54:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 633 transitions. [2023-08-27 01:54:43,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41699604743083 [2023-08-27 01:54:43,897 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 633 transitions. [2023-08-27 01:54:43,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 633 transitions. [2023-08-27 01:54:43,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:43,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 633 transitions. [2023-08-27 01:54:43,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,902 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,902 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 63 flow. Second operand 6 states and 633 transitions. [2023-08-27 01:54:43,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 159 flow [2023-08-27 01:54:43,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 154 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 01:54:43,904 INFO L231 Difference]: Finished difference. Result has 29 places, 30 transitions, 142 flow [2023-08-27 01:54:43,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=29, PETRI_TRANSITIONS=30} [2023-08-27 01:54:43,904 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 01:54:43,904 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 30 transitions, 142 flow [2023-08-27 01:54:43,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:43,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:43,905 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 01:54:43,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 01:54:44,113 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 01:54:44,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:44,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 17077158, now seen corresponding path program 1 times [2023-08-27 01:54:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:44,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180256126] [2023-08-27 01:54:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:44,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:44,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180256126] [2023-08-27 01:54:44,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180256126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:44,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:54:44,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:54:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138322831] [2023-08-27 01:54:44,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:54:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:54:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:54:44,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2023-08-27 01:54:44,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:44,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2023-08-27 01:54:44,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:44,223 INFO L124 PetriNetUnfolderBase]: 45/84 cut-off events. [2023-08-27 01:54:44,224 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:54:44,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 84 events. 45/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 164 event pairs, 24 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 174. Up to 78 conditions per place. [2023-08-27 01:54:44,225 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 20 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-27 01:54:44,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 167 flow [2023-08-27 01:54:44,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:54:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:54:44,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-27 01:54:44,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-08-27 01:54:44,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-27 01:54:44,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-27 01:54:44,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:44,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-27 01:54:44,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,231 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,231 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 142 flow. Second operand 3 states and 319 transitions. [2023-08-27 01:54:44,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 167 flow [2023-08-27 01:54:44,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 146 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 01:54:44,233 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2023-08-27 01:54:44,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-27 01:54:44,234 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 01:54:44,234 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2023-08-27 01:54:44,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:44,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 01:54:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 01:54:44,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:44,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash 17068569, now seen corresponding path program 1 times [2023-08-27 01:54:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372733157] [2023-08-27 01:54:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:44,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:44,334 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 01:54:44,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:44,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372733157] [2023-08-27 01:54:44,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372733157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:44,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:54:44,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:54:44,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106959105] [2023-08-27 01:54:44,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:44,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:54:44,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:44,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:54:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:54:44,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 253 [2023-08-27 01:54:44,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:44,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 253 [2023-08-27 01:54:44,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:44,387 INFO L124 PetriNetUnfolderBase]: 53/111 cut-off events. [2023-08-27 01:54:44,387 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 01:54:44,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 111 events. 53/111 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 276 event pairs, 33 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 230. Up to 83 conditions per place. [2023-08-27 01:54:44,388 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 33 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-27 01:54:44,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 202 flow [2023-08-27 01:54:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:54:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:54:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2023-08-27 01:54:44,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40118577075098816 [2023-08-27 01:54:44,389 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2023-08-27 01:54:44,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2023-08-27 01:54:44,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:44,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2023-08-27 01:54:44,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,392 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,392 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 4 states and 406 transitions. [2023-08-27 01:54:44,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 202 flow [2023-08-27 01:54:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 36 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:54:44,393 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 109 flow [2023-08-27 01:54:44,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-27 01:54:44,394 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-27 01:54:44,394 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 109 flow [2023-08-27 01:54:44,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:44,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 01:54:44,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 01:54:44,395 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:44,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:44,395 INFO L85 PathProgramCache]: Analyzing trace with hash 529384396, now seen corresponding path program 1 times [2023-08-27 01:54:44,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:44,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478554481] [2023-08-27 01:54:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:44,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:44,445 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 01:54:44,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:44,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478554481] [2023-08-27 01:54:44,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478554481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:44,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347537465] [2023-08-27 01:54:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:44,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:44,462 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 01:54:44,463 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 01:54:44,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:44,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:54:44,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:44,526 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 01:54:44,526 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:54:44,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347537465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:44,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:54:44,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 01:54:44,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467536910] [2023-08-27 01:54:44,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:44,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:54:44,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:44,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:54:44,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:54:44,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2023-08-27 01:54:44,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:44,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2023-08-27 01:54:44,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:44,551 INFO L124 PetriNetUnfolderBase]: 34/78 cut-off events. [2023-08-27 01:54:44,552 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 01:54:44,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 78 events. 34/78 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 18 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 174. Up to 78 conditions per place. [2023-08-27 01:54:44,552 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 23 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-27 01:54:44,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 149 flow [2023-08-27 01:54:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:54:44,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:54:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-27 01:54:44,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43873517786561267 [2023-08-27 01:54:44,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-27 01:54:44,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-27 01:54:44,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:44,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-27 01:54:44,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,556 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,556 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 109 flow. Second operand 3 states and 333 transitions. [2023-08-27 01:54:44,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 149 flow [2023-08-27 01:54:44,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 24 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:54:44,557 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 98 flow [2023-08-27 01:54:44,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-27 01:54:44,558 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 01:54:44,558 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 98 flow [2023-08-27 01:54:44,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:44,558 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 01:54:44,568 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 01:54:44,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:44,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:44,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:44,764 INFO L85 PathProgramCache]: Analyzing trace with hash -768685550, now seen corresponding path program 2 times [2023-08-27 01:54:44,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714144876] [2023-08-27 01:54:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:44,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:44,832 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 01:54:44,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714144876] [2023-08-27 01:54:44,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714144876] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:44,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133275712] [2023-08-27 01:54:44,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:54:44,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:44,851 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 01:54:44,851 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 01:54:44,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:54:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:44,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:54:44,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:44,910 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 01:54:44,910 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:54:44,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133275712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:44,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:54:44,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 01:54:44,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478158831] [2023-08-27 01:54:44,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:54:44,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:54:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:54:44,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 01:54:44,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:44,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 01:54:44,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:44,936 INFO L124 PetriNetUnfolderBase]: 34/77 cut-off events. [2023-08-27 01:54:44,936 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 01:54:44,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 77 events. 34/77 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 159 event pairs, 18 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 187. Up to 77 conditions per place. [2023-08-27 01:54:44,938 INFO L140 encePairwiseOnDemand]: 251/253 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-27 01:54:44,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 134 flow [2023-08-27 01:54:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:54:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:54:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-27 01:54:44,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-08-27 01:54:44,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-27 01:54:44,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-27 01:54:44,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:44,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-27 01:54:44,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,942 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 98 flow. Second operand 3 states and 319 transitions. [2023-08-27 01:54:44,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 134 flow [2023-08-27 01:54:44,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 117 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 01:54:44,944 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 73 flow [2023-08-27 01:54:44,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-27 01:54:44,946 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-08-27 01:54:44,946 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 73 flow [2023-08-27 01:54:44,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:44,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:44,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:44,951 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 01:54:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:45,151 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:45,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1105625562, now seen corresponding path program 1 times [2023-08-27 01:54:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215870828] [2023-08-27 01:54:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:45,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:45,212 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 01:54:45,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:45,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215870828] [2023-08-27 01:54:45,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215870828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:45,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:54:45,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:54:45,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842973435] [2023-08-27 01:54:45,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:45,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:54:45,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:45,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:54:45,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:54:45,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2023-08-27 01:54:45,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:45,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2023-08-27 01:54:45,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:45,250 INFO L124 PetriNetUnfolderBase]: 50/105 cut-off events. [2023-08-27 01:54:45,250 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 01:54:45,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 105 events. 50/105 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 252 event pairs, 18 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 243. Up to 69 conditions per place. [2023-08-27 01:54:45,251 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 26 selfloop transitions, 2 changer transitions 3/31 dead transitions. [2023-08-27 01:54:45,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 157 flow [2023-08-27 01:54:45,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:54:45,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:54:45,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-27 01:54:45,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2023-08-27 01:54:45,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-27 01:54:45,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-27 01:54:45,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:45,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-27 01:54:45,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,254 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 73 flow. Second operand 3 states and 339 transitions. [2023-08-27 01:54:45,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 157 flow [2023-08-27 01:54:45,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:54:45,255 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 80 flow [2023-08-27 01:54:45,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-27 01:54:45,256 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-27 01:54:45,256 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 80 flow [2023-08-27 01:54:45,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:45,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:45,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 01:54:45,256 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:45,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1304590821, now seen corresponding path program 1 times [2023-08-27 01:54:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:45,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381326289] [2023-08-27 01:54:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:45,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:45,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381326289] [2023-08-27 01:54:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381326289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:54:45,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:54:45,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:54:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581718427] [2023-08-27 01:54:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:54:45,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:54:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:45,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:54:45,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:54:45,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 01:54:45,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:45,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 01:54:45,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:45,382 INFO L124 PetriNetUnfolderBase]: 55/109 cut-off events. [2023-08-27 01:54:45,382 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-27 01:54:45,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 109 events. 55/109 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 264 event pairs, 17 based on Foata normal form. 6/114 useless extension candidates. Maximal degree in co-relation 273. Up to 74 conditions per place. [2023-08-27 01:54:45,383 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 25 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2023-08-27 01:54:45,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 167 flow [2023-08-27 01:54:45,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:54:45,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:54:45,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-27 01:54:45,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321475625823452 [2023-08-27 01:54:45,384 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-27 01:54:45,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-27 01:54:45,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:45,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-27 01:54:45,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,386 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 80 flow. Second operand 3 states and 328 transitions. [2023-08-27 01:54:45,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 32 transitions, 167 flow [2023-08-27 01:54:45,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:54:45,387 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 92 flow [2023-08-27 01:54:45,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-27 01:54:45,389 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-27 01:54:45,389 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 92 flow [2023-08-27 01:54:45,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:45,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:45,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:45,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 01:54:45,391 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:45,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash 210331694, now seen corresponding path program 1 times [2023-08-27 01:54:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:45,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787644434] [2023-08-27 01:54:45,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:45,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:45,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:54:45,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787644434] [2023-08-27 01:54:45,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787644434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:45,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714441527] [2023-08-27 01:54:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:45,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:45,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:45,684 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 01:54:45,732 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 01:54:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:45,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 01:54:45,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:45,845 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 01:54:45,876 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 01:54:45,896 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:54:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:54:45,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:46,128 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:54:46,128 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 60 treesize of output 48 [2023-08-27 01:54:46,137 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:54:46,138 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 140 treesize of output 127 [2023-08-27 01:54:46,152 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 01:54:46,152 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 124 treesize of output 100 [2023-08-27 01:54:46,160 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 01:54:46,161 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 79 treesize of output 67 [2023-08-27 01:54:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:54:46,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714441527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:46,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:46,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-27 01:54:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605130132] [2023-08-27 01:54:46,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:54:46,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:54:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=206, Unknown=2, NotChecked=0, Total=272 [2023-08-27 01:54:46,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-27 01:54:46,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 92 flow. Second operand has 17 states, 17 states have (on average 71.05882352941177) internal successors, (1208), 17 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:46,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:46,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-27 01:54:46,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:48,624 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 01:54:48,881 INFO L124 PetriNetUnfolderBase]: 255/496 cut-off events. [2023-08-27 01:54:48,881 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-08-27 01:54:48,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 496 events. 255/496 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2293 event pairs, 34 based on Foata normal form. 3/498 useless extension candidates. Maximal degree in co-relation 1360. Up to 144 conditions per place. [2023-08-27 01:54:48,883 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 69 selfloop transitions, 29 changer transitions 27/125 dead transitions. [2023-08-27 01:54:48,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 125 transitions, 675 flow [2023-08-27 01:54:48,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 01:54:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 01:54:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1297 transitions. [2023-08-27 01:54:48,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30155777726110206 [2023-08-27 01:54:48,892 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1297 transitions. [2023-08-27 01:54:48,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1297 transitions. [2023-08-27 01:54:48,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:48,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1297 transitions. [2023-08-27 01:54:48,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.29411764705883) internal successors, (1297), 17 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:48,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 253.0) internal successors, (4554), 18 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:48,899 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 253.0) internal successors, (4554), 18 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:48,899 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 92 flow. Second operand 17 states and 1297 transitions. [2023-08-27 01:54:48,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 125 transitions, 675 flow [2023-08-27 01:54:48,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 125 transitions, 656 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 01:54:48,901 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 306 flow [2023-08-27 01:54:48,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=306, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-27 01:54:48,902 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2023-08-27 01:54:48,902 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 306 flow [2023-08-27 01:54:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 71.05882352941177) internal successors, (1208), 17 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:48,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:48,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:48,922 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 01:54:49,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:49,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:49,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:49,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1738663932, now seen corresponding path program 2 times [2023-08-27 01:54:49,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:49,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934815661] [2023-08-27 01:54:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:49,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:54:49,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:49,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934815661] [2023-08-27 01:54:49,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934815661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:49,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450806417] [2023-08-27 01:54:49,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:54:49,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:49,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:49,565 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 01:54:49,605 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 01:54:49,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:54:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:49,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 01:54:49,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:54:49,744 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 01:54:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:49,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:49,823 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:54:49,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-27 01:54:49,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-08-27 01:54:49,868 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450806417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:49,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:49,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-08-27 01:54:49,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212431099] [2023-08-27 01:54:49,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:49,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 01:54:49,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 01:54:49,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=169, Unknown=2, NotChecked=0, Total=210 [2023-08-27 01:54:49,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:54:49,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 306 flow. Second operand has 15 states, 15 states have (on average 74.26666666666667) internal successors, (1114), 15 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:49,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:49,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:54:49,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:50,190 INFO L124 PetriNetUnfolderBase]: 337/645 cut-off events. [2023-08-27 01:54:50,191 INFO L125 PetriNetUnfolderBase]: For 1194/1194 co-relation queries the response was YES. [2023-08-27 01:54:50,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2148 conditions, 645 events. 337/645 cut-off events. For 1194/1194 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3157 event pairs, 81 based on Foata normal form. 3/647 useless extension candidates. Maximal degree in co-relation 2128. Up to 174 conditions per place. [2023-08-27 01:54:50,194 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 54 selfloop transitions, 22 changer transitions 16/92 dead transitions. [2023-08-27 01:54:50,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 92 transitions, 676 flow [2023-08-27 01:54:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 01:54:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 01:54:50,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 712 transitions. [2023-08-27 01:54:50,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3126921387790953 [2023-08-27 01:54:50,197 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 712 transitions. [2023-08-27 01:54:50,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 712 transitions. [2023-08-27 01:54:50,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:50,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 712 transitions. [2023-08-27 01:54:50,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 79.11111111111111) internal successors, (712), 9 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,201 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 253.0) internal successors, (2530), 10 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,201 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 306 flow. Second operand 9 states and 712 transitions. [2023-08-27 01:54:50,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 92 transitions, 676 flow [2023-08-27 01:54:50,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 92 transitions, 634 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-27 01:54:50,207 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 383 flow [2023-08-27 01:54:50,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=383, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-27 01:54:50,208 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 29 predicate places. [2023-08-27 01:54:50,208 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 383 flow [2023-08-27 01:54:50,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.26666666666667) internal successors, (1114), 15 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:50,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:50,221 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 01:54:50,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 01:54:50,414 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:50,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1669688600, now seen corresponding path program 3 times [2023-08-27 01:54:50,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:50,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861182204] [2023-08-27 01:54:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:50,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:50,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861182204] [2023-08-27 01:54:50,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861182204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:50,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094597903] [2023-08-27 01:54:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:54:50,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:50,529 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 01:54:50,593 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 01:54:50,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:54:50,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:50,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 01:54:50,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:50,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:50,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:50,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094597903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:50,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:50,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 8 [2023-08-27 01:54:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79520807] [2023-08-27 01:54:50,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:50,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 01:54:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 01:54:50,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-27 01:54:50,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 01:54:50,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 383 flow. Second operand has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:50,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 01:54:50,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:50,863 INFO L124 PetriNetUnfolderBase]: 469/915 cut-off events. [2023-08-27 01:54:50,864 INFO L125 PetriNetUnfolderBase]: For 2647/2647 co-relation queries the response was YES. [2023-08-27 01:54:50,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3158 conditions, 915 events. 469/915 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4940 event pairs, 145 based on Foata normal form. 36/950 useless extension candidates. Maximal degree in co-relation 3136. Up to 367 conditions per place. [2023-08-27 01:54:50,867 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 55 selfloop transitions, 23 changer transitions 0/78 dead transitions. [2023-08-27 01:54:50,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 698 flow [2023-08-27 01:54:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:54:50,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:54:50,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2023-08-27 01:54:50,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357707509881423 [2023-08-27 01:54:50,869 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 441 transitions. [2023-08-27 01:54:50,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 441 transitions. [2023-08-27 01:54:50,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:50,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 441 transitions. [2023-08-27 01:54:50,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,872 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,872 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 383 flow. Second operand 4 states and 441 transitions. [2023-08-27 01:54:50,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 698 flow [2023-08-27 01:54:50,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 650 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-08-27 01:54:50,879 INFO L231 Difference]: Finished difference. Result has 53 places, 59 transitions, 537 flow [2023-08-27 01:54:50,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=537, PETRI_PLACES=53, PETRI_TRANSITIONS=59} [2023-08-27 01:54:50,879 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 28 predicate places. [2023-08-27 01:54:50,879 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 59 transitions, 537 flow [2023-08-27 01:54:50,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.33333333333333) internal successors, (948), 9 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:50,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:50,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:50,891 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 01:54:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:51,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:51,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1361963249, now seen corresponding path program 4 times [2023-08-27 01:54:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371437146] [2023-08-27 01:54:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:51,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:54:51,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371437146] [2023-08-27 01:54:51,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371437146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:51,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195263537] [2023-08-27 01:54:51,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:54:51,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:51,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:51,229 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 01:54:51,249 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 01:54:51,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:54:51,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:51,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 01:54:51,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:54:51,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:54:51,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195263537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:51,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:51,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 01:54:51,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076628276] [2023-08-27 01:54:51,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 01:54:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 01:54:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:54:51,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 253 [2023-08-27 01:54:51,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 537 flow. Second operand has 12 states, 12 states have (on average 93.16666666666667) internal successors, (1118), 12 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:51,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:51,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 253 [2023-08-27 01:54:51,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:51,535 INFO L124 PetriNetUnfolderBase]: 306/629 cut-off events. [2023-08-27 01:54:51,535 INFO L125 PetriNetUnfolderBase]: For 2224/2224 co-relation queries the response was YES. [2023-08-27 01:54:51,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2307 conditions, 629 events. 306/629 cut-off events. For 2224/2224 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3167 event pairs, 214 based on Foata normal form. 19/647 useless extension candidates. Maximal degree in co-relation 2285. Up to 498 conditions per place. [2023-08-27 01:54:51,537 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 37 selfloop transitions, 3 changer transitions 21/61 dead transitions. [2023-08-27 01:54:51,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 546 flow [2023-08-27 01:54:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:54:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:54:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 584 transitions. [2023-08-27 01:54:51,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847167325428195 [2023-08-27 01:54:51,539 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 584 transitions. [2023-08-27 01:54:51,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 584 transitions. [2023-08-27 01:54:51,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:51,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 584 transitions. [2023-08-27 01:54:51,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.33333333333333) internal successors, (584), 6 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:51,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:51,542 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:51,542 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 537 flow. Second operand 6 states and 584 transitions. [2023-08-27 01:54:51,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 546 flow [2023-08-27 01:54:51,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 516 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-27 01:54:51,546 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 309 flow [2023-08-27 01:54:51,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-27 01:54:51,547 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2023-08-27 01:54:51,547 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 309 flow [2023-08-27 01:54:51,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 93.16666666666667) internal successors, (1118), 12 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:51,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:51,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:51,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 01:54:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:51,752 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:51,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash 728517928, now seen corresponding path program 5 times [2023-08-27 01:54:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836586957] [2023-08-27 01:54:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:52,203 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 01:54:52,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:52,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836586957] [2023-08-27 01:54:52,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836586957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:52,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72765399] [2023-08-27 01:54:52,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:54:52,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:52,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:52,204 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 01:54:52,210 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 01:54:52,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:54:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:52,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 01:54:52,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:54:52,478 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 01:54:52,560 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:54:52,561 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 10 [2023-08-27 01:54:52,565 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 01:54:52,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:52,648 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:54:52,649 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:54:52,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:54:52,896 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 01:54:52,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72765399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:52,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-27 01:54:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291007330] [2023-08-27 01:54:52,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:52,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:54:52,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:52,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:54:52,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=606, Unknown=1, NotChecked=0, Total=702 [2023-08-27 01:54:52,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:54:52,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 309 flow. Second operand has 27 states, 27 states have (on average 73.77777777777777) internal successors, (1992), 27 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:52,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:52,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:54:52,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:55,146 INFO L124 PetriNetUnfolderBase]: 774/1470 cut-off events. [2023-08-27 01:54:55,147 INFO L125 PetriNetUnfolderBase]: For 3965/3965 co-relation queries the response was YES. [2023-08-27 01:54:55,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5326 conditions, 1470 events. 774/1470 cut-off events. For 3965/3965 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8295 event pairs, 109 based on Foata normal form. 9/1478 useless extension candidates. Maximal degree in co-relation 5303. Up to 308 conditions per place. [2023-08-27 01:54:55,154 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 145 selfloop transitions, 57 changer transitions 38/240 dead transitions. [2023-08-27 01:54:55,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 240 transitions, 1838 flow [2023-08-27 01:54:55,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:54:55,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:54:55,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2160 transitions. [2023-08-27 01:54:55,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31620553359683795 [2023-08-27 01:54:55,159 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2160 transitions. [2023-08-27 01:54:55,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2160 transitions. [2023-08-27 01:54:55,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:55,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2160 transitions. [2023-08-27 01:54:55,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 80.0) internal successors, (2160), 27 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:55,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:55,171 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:55,171 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 309 flow. Second operand 27 states and 2160 transitions. [2023-08-27 01:54:55,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 240 transitions, 1838 flow [2023-08-27 01:54:55,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 240 transitions, 1744 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-08-27 01:54:55,179 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 1108 flow [2023-08-27 01:54:55,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1108, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2023-08-27 01:54:55,180 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2023-08-27 01:54:55,181 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 1108 flow [2023-08-27 01:54:55,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 73.77777777777777) internal successors, (1992), 27 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:55,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:55,181 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:55,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 01:54:55,386 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,SelfDestructingSolverStorable12 [2023-08-27 01:54:55,387 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:55,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:55,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2107992248, now seen corresponding path program 6 times [2023-08-27 01:54:55,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:55,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065995867] [2023-08-27 01:54:55,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:55,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:55,800 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 01:54:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065995867] [2023-08-27 01:54:55,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065995867] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:55,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508361170] [2023-08-27 01:54:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:54:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:55,808 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 01:54:55,809 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 01:54:55,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 01:54:55,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:55,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 01:54:55,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:55,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:54:55,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:56,012 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:54:56,012 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 11 [2023-08-27 01:54:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 01:54:56,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508361170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:56,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:56,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 12 [2023-08-27 01:54:56,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672753577] [2023-08-27 01:54:56,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:56,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:54:56,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:56,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:54:56,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:54:56,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 01:54:56,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 1108 flow. Second operand has 14 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:56,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:56,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 01:54:56,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:56,722 INFO L124 PetriNetUnfolderBase]: 996/1874 cut-off events. [2023-08-27 01:54:56,722 INFO L125 PetriNetUnfolderBase]: For 7970/7970 co-relation queries the response was YES. [2023-08-27 01:54:56,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7245 conditions, 1874 events. 996/1874 cut-off events. For 7970/7970 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11184 event pairs, 195 based on Foata normal form. 10/1883 useless extension candidates. Maximal degree in co-relation 7215. Up to 654 conditions per place. [2023-08-27 01:54:56,736 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 111 selfloop transitions, 62 changer transitions 70/243 dead transitions. [2023-08-27 01:54:56,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 243 transitions, 2266 flow [2023-08-27 01:54:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:54:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:54:56,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1838 transitions. [2023-08-27 01:54:56,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3302191879266978 [2023-08-27 01:54:56,740 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1838 transitions. [2023-08-27 01:54:56,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1838 transitions. [2023-08-27 01:54:56,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:56,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1838 transitions. [2023-08-27 01:54:56,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 83.54545454545455) internal successors, (1838), 22 states have internal predecessors, (1838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:56,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 253.0) internal successors, (5819), 23 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:56,749 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 253.0) internal successors, (5819), 23 states have internal predecessors, (5819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:56,749 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 1108 flow. Second operand 22 states and 1838 transitions. [2023-08-27 01:54:56,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 243 transitions, 2266 flow [2023-08-27 01:54:56,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 243 transitions, 1809 flow, removed 225 selfloop flow, removed 4 redundant places. [2023-08-27 01:54:56,766 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 1210 flow [2023-08-27 01:54:56,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1210, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2023-08-27 01:54:56,766 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2023-08-27 01:54:56,766 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 1210 flow [2023-08-27 01:54:56,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 78.42857142857143) internal successors, (1098), 14 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:56,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:56,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:56,785 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 01:54:56,972 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,SelfDestructingSolverStorable13 [2023-08-27 01:54:56,973 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:56,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:56,973 INFO L85 PathProgramCache]: Analyzing trace with hash -605667410, now seen corresponding path program 7 times [2023-08-27 01:54:56,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350930598] [2023-08-27 01:54:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:54:57,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:57,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350930598] [2023-08-27 01:54:57,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350930598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:57,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297028043] [2023-08-27 01:54:57,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:54:57,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:57,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:57,086 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 01:54:57,126 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 01:54:57,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:57,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:54:57,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:57,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:57,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:57,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297028043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:57,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:57,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-08-27 01:54:57,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409357779] [2023-08-27 01:54:57,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:57,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:54:57,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:57,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:54:57,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:54:57,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 253 [2023-08-27 01:54:57,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 1210 flow. Second operand has 20 states, 20 states have (on average 91.5) internal successors, (1830), 20 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:57,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:57,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 253 [2023-08-27 01:54:57,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:57,865 INFO L124 PetriNetUnfolderBase]: 982/1880 cut-off events. [2023-08-27 01:54:57,865 INFO L125 PetriNetUnfolderBase]: For 7623/7623 co-relation queries the response was YES. [2023-08-27 01:54:57,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6896 conditions, 1880 events. 982/1880 cut-off events. For 7623/7623 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11520 event pairs, 185 based on Foata normal form. 40/1919 useless extension candidates. Maximal degree in co-relation 6862. Up to 423 conditions per place. [2023-08-27 01:54:57,875 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 59 selfloop transitions, 41 changer transitions 71/171 dead transitions. [2023-08-27 01:54:57,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1832 flow [2023-08-27 01:54:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 01:54:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 01:54:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1351 transitions. [2023-08-27 01:54:57,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814229249011858 [2023-08-27 01:54:57,878 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1351 transitions. [2023-08-27 01:54:57,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1351 transitions. [2023-08-27 01:54:57,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:57,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1351 transitions. [2023-08-27 01:54:57,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.5) internal successors, (1351), 14 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:57,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:57,897 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:57,897 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 1210 flow. Second operand 14 states and 1351 transitions. [2023-08-27 01:54:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1832 flow [2023-08-27 01:54:57,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 171 transitions, 1510 flow, removed 92 selfloop flow, removed 19 redundant places. [2023-08-27 01:54:57,916 INFO L231 Difference]: Finished difference. Result has 85 places, 74 transitions, 819 flow [2023-08-27 01:54:57,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=819, PETRI_PLACES=85, PETRI_TRANSITIONS=74} [2023-08-27 01:54:57,917 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-08-27 01:54:57,917 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 74 transitions, 819 flow [2023-08-27 01:54:57,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 91.5) internal successors, (1830), 20 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:57,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:57,917 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:57,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-27 01:54:58,122 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,SelfDestructingSolverStorable14 [2023-08-27 01:54:58,123 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:58,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:58,123 INFO L85 PathProgramCache]: Analyzing trace with hash 334096013, now seen corresponding path program 8 times [2023-08-27 01:54:58,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:58,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809488492] [2023-08-27 01:54:58,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:58,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:54:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809488492] [2023-08-27 01:54:58,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809488492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:58,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808835710] [2023-08-27 01:54:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:54:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:58,593 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 01:54:58,595 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 01:54:58,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:54:58,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:58,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 01:54:58,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:54:58,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:58,810 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:54:58,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 01:54:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:54:58,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808835710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:58,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:58,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 15 [2023-08-27 01:54:58,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823902961] [2023-08-27 01:54:58,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:58,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:54:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:58,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:54:58,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-08-27 01:54:58,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 01:54:58,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 74 transitions, 819 flow. Second operand has 17 states, 17 states have (on average 77.88235294117646) internal successors, (1324), 17 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:58,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:58,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 01:54:58,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:59,467 INFO L124 PetriNetUnfolderBase]: 931/1744 cut-off events. [2023-08-27 01:54:59,468 INFO L125 PetriNetUnfolderBase]: For 5409/5409 co-relation queries the response was YES. [2023-08-27 01:54:59,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6682 conditions, 1744 events. 931/1744 cut-off events. For 5409/5409 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 10595 event pairs, 114 based on Foata normal form. 4/1747 useless extension candidates. Maximal degree in co-relation 6657. Up to 437 conditions per place. [2023-08-27 01:54:59,475 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 112 selfloop transitions, 65 changer transitions 60/237 dead transitions. [2023-08-27 01:54:59,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 237 transitions, 2061 flow [2023-08-27 01:54:59,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 01:54:59,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 01:54:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2002 transitions. [2023-08-27 01:54:59,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32971014492753625 [2023-08-27 01:54:59,478 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2002 transitions. [2023-08-27 01:54:59,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2002 transitions. [2023-08-27 01:54:59,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:59,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2002 transitions. [2023-08-27 01:54:59,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.41666666666667) internal successors, (2002), 24 states have internal predecessors, (2002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:59,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:59,486 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:59,486 INFO L175 Difference]: Start difference. First operand has 85 places, 74 transitions, 819 flow. Second operand 24 states and 2002 transitions. [2023-08-27 01:54:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 237 transitions, 2061 flow [2023-08-27 01:54:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 237 transitions, 1973 flow, removed 40 selfloop flow, removed 6 redundant places. [2023-08-27 01:54:59,495 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 1154 flow [2023-08-27 01:54:59,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1154, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2023-08-27 01:54:59,496 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-08-27 01:54:59,496 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 1154 flow [2023-08-27 01:54:59,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.88235294117646) internal successors, (1324), 17 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:59,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:59,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:59,505 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 01:54:59,701 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,SelfDestructingSolverStorable15 [2023-08-27 01:54:59,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:54:59,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:59,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1301871141, now seen corresponding path program 9 times [2023-08-27 01:54:59,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:59,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943154827] [2023-08-27 01:54:59,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:59,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:00,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:00,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943154827] [2023-08-27 01:55:00,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943154827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:00,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866061602] [2023-08-27 01:55:00,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:55:00,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:00,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:00,353 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 01:55:00,358 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 01:55:00,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:55:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:00,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 01:55:00,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:00,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:00,648 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 01:55:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:55:00,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:00,717 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_460 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_460) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 4)))) is different from false [2023-08-27 01:55:00,731 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:00,732 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:55:00,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:55:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2023-08-27 01:55:00,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866061602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:00,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:00,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 20 [2023-08-27 01:55:00,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504579516] [2023-08-27 01:55:00,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:00,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 01:55:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 01:55:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=367, Unknown=1, NotChecked=38, Total=462 [2023-08-27 01:55:00,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:55:00,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 1154 flow. Second operand has 22 states, 22 states have (on average 73.86363636363636) internal successors, (1625), 22 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:00,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:00,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:55:00,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:01,725 INFO L124 PetriNetUnfolderBase]: 1161/2151 cut-off events. [2023-08-27 01:55:01,725 INFO L125 PetriNetUnfolderBase]: For 8244/8244 co-relation queries the response was YES. [2023-08-27 01:55:01,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8449 conditions, 2151 events. 1161/2151 cut-off events. For 8244/8244 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 13275 event pairs, 144 based on Foata normal form. 4/2154 useless extension candidates. Maximal degree in co-relation 8424. Up to 549 conditions per place. [2023-08-27 01:55:01,734 INFO L140 encePairwiseOnDemand]: 242/253 looper letters, 71 selfloop transitions, 89 changer transitions 41/201 dead transitions. [2023-08-27 01:55:01,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 201 transitions, 2161 flow [2023-08-27 01:55:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 01:55:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 01:55:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1421 transitions. [2023-08-27 01:55:01,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3120333772507686 [2023-08-27 01:55:01,736 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1421 transitions. [2023-08-27 01:55:01,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1421 transitions. [2023-08-27 01:55:01,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:01,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1421 transitions. [2023-08-27 01:55:01,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 78.94444444444444) internal successors, (1421), 18 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:01,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:01,742 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:01,742 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 1154 flow. Second operand 18 states and 1421 transitions. [2023-08-27 01:55:01,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 201 transitions, 2161 flow [2023-08-27 01:55:01,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 201 transitions, 2050 flow, removed 19 selfloop flow, removed 12 redundant places. [2023-08-27 01:55:01,762 INFO L231 Difference]: Finished difference. Result has 87 places, 115 transitions, 1626 flow [2023-08-27 01:55:01,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1626, PETRI_PLACES=87, PETRI_TRANSITIONS=115} [2023-08-27 01:55:01,762 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 62 predicate places. [2023-08-27 01:55:01,762 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 115 transitions, 1626 flow [2023-08-27 01:55:01,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 73.86363636363636) internal successors, (1625), 22 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:01,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:01,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:01,771 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 01:55:01,968 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,SelfDestructingSolverStorable16 [2023-08-27 01:55:01,969 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:55:01,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash -83573698, now seen corresponding path program 10 times [2023-08-27 01:55:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846998767] [2023-08-27 01:55:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:02,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846998767] [2023-08-27 01:55:02,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846998767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:02,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730593223] [2023-08-27 01:55:02,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:55:02,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:02,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:02,541 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 01:55:02,607 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 01:55:02,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:55:02,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:02,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:55:02,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:02,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:02,973 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 01:55:03,122 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:55:03,122 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 10 [2023-08-27 01:55:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:03,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:03,274 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:03,275 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:55:03,284 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:55:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:03,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730593223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:03,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:03,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-27 01:55:03,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511327283] [2023-08-27 01:55:03,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:03,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 01:55:03,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:03,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 01:55:03,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1114, Unknown=5, NotChecked=0, Total=1260 [2023-08-27 01:55:03,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:55:03,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 115 transitions, 1626 flow. Second operand has 36 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:03,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:03,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:55:03,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:18,336 INFO L124 PetriNetUnfolderBase]: 3091/5751 cut-off events. [2023-08-27 01:55:18,337 INFO L125 PetriNetUnfolderBase]: For 29484/29484 co-relation queries the response was YES. [2023-08-27 01:55:18,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28162 conditions, 5751 events. 3091/5751 cut-off events. For 29484/29484 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 40729 event pairs, 329 based on Foata normal form. 27/5777 useless extension candidates. Maximal degree in co-relation 28133. Up to 2522 conditions per place. [2023-08-27 01:55:18,374 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 448 selfloop transitions, 228 changer transitions 93/769 dead transitions. [2023-08-27 01:55:18,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 769 transitions, 8249 flow [2023-08-27 01:55:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-27 01:55:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-27 01:55:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6034 transitions. [2023-08-27 01:55:18,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3179973649538867 [2023-08-27 01:55:18,393 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6034 transitions. [2023-08-27 01:55:18,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6034 transitions. [2023-08-27 01:55:18,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:18,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6034 transitions. [2023-08-27 01:55:18,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 80.45333333333333) internal successors, (6034), 75 states have internal predecessors, (6034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:18,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 253.0) internal successors, (19228), 76 states have internal predecessors, (19228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:18,433 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 253.0) internal successors, (19228), 76 states have internal predecessors, (19228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:18,433 INFO L175 Difference]: Start difference. First operand has 87 places, 115 transitions, 1626 flow. Second operand 75 states and 6034 transitions. [2023-08-27 01:55:18,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 769 transitions, 8249 flow [2023-08-27 01:55:18,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 769 transitions, 7919 flow, removed 119 selfloop flow, removed 9 redundant places. [2023-08-27 01:55:18,481 INFO L231 Difference]: Finished difference. Result has 184 places, 319 transitions, 4830 flow [2023-08-27 01:55:18,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=4830, PETRI_PLACES=184, PETRI_TRANSITIONS=319} [2023-08-27 01:55:18,482 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 159 predicate places. [2023-08-27 01:55:18,482 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 319 transitions, 4830 flow [2023-08-27 01:55:18,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:18,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:18,482 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:18,501 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 01:55:18,687 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,SelfDestructingSolverStorable17 [2023-08-27 01:55:18,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:55:18,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:18,688 INFO L85 PathProgramCache]: Analyzing trace with hash -308699910, now seen corresponding path program 11 times [2023-08-27 01:55:18,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:18,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761582609] [2023-08-27 01:55:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:19,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:19,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761582609] [2023-08-27 01:55:19,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761582609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:19,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211282470] [2023-08-27 01:55:19,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:55:19,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:19,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:19,035 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 01:55:19,037 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 01:55:19,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 01:55:19,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:19,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 01:55:19,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:19,304 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:55:19,304 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 10 [2023-08-27 01:55:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:55:19,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:19,342 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:55:19,342 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 11 [2023-08-27 01:55:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:55:19,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211282470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:19,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:19,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2023-08-27 01:55:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825220214] [2023-08-27 01:55:19,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:19,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:55:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:55:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2023-08-27 01:55:19,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 01:55:19,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 319 transitions, 4830 flow. Second operand has 28 states, 28 states have (on average 77.57142857142857) internal successors, (2172), 28 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:19,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:19,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 01:55:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:22,642 INFO L124 PetriNetUnfolderBase]: 2883/5479 cut-off events. [2023-08-27 01:55:22,643 INFO L125 PetriNetUnfolderBase]: For 67336/67336 co-relation queries the response was YES. [2023-08-27 01:55:22,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28753 conditions, 5479 events. 2883/5479 cut-off events. For 67336/67336 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 38507 event pairs, 216 based on Foata normal form. 154/5631 useless extension candidates. Maximal degree in co-relation 28692. Up to 2444 conditions per place. [2023-08-27 01:55:22,712 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 243 selfloop transitions, 203 changer transitions 154/600 dead transitions. [2023-08-27 01:55:22,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 600 transitions, 7765 flow [2023-08-27 01:55:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 01:55:22,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 01:55:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3766 transitions. [2023-08-27 01:55:22,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3307861220904699 [2023-08-27 01:55:22,718 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3766 transitions. [2023-08-27 01:55:22,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3766 transitions. [2023-08-27 01:55:22,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:22,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3766 transitions. [2023-08-27 01:55:22,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 83.68888888888888) internal successors, (3766), 45 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:22,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 253.0) internal successors, (11638), 46 states have internal predecessors, (11638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:22,730 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 253.0) internal successors, (11638), 46 states have internal predecessors, (11638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:22,731 INFO L175 Difference]: Start difference. First operand has 184 places, 319 transitions, 4830 flow. Second operand 45 states and 3766 transitions. [2023-08-27 01:55:22,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 600 transitions, 7765 flow [2023-08-27 01:55:22,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 600 transitions, 6261 flow, removed 732 selfloop flow, removed 8 redundant places. [2023-08-27 01:55:22,963 INFO L231 Difference]: Finished difference. Result has 226 places, 298 transitions, 3822 flow [2023-08-27 01:55:22,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=3822, PETRI_PLACES=226, PETRI_TRANSITIONS=298} [2023-08-27 01:55:22,964 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 201 predicate places. [2023-08-27 01:55:22,964 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 298 transitions, 3822 flow [2023-08-27 01:55:22,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.57142857142857) internal successors, (2172), 28 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:22,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:22,971 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 01:55:23,169 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 01:55:23,169 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:55:23,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:23,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1133222812, now seen corresponding path program 12 times [2023-08-27 01:55:23,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:23,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449015604] [2023-08-27 01:55:23,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:23,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:23,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449015604] [2023-08-27 01:55:23,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449015604] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49324088] [2023-08-27 01:55:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:55:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:23,629 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 01:55:23,631 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 01:55:23,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:55:23,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:23,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 01:55:23,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:55:23,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:23,955 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:55:23,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 01:55:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 01:55:23,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49324088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:23,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:23,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 18 [2023-08-27 01:55:23,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906940218] [2023-08-27 01:55:23,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:23,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:55:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:55:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:55:23,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 01:55:23,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 298 transitions, 3822 flow. Second operand has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:23,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:23,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 01:55:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:25,695 INFO L124 PetriNetUnfolderBase]: 1629/3168 cut-off events. [2023-08-27 01:55:25,695 INFO L125 PetriNetUnfolderBase]: For 30706/30706 co-relation queries the response was YES. [2023-08-27 01:55:25,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16076 conditions, 3168 events. 1629/3168 cut-off events. For 30706/30706 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22003 event pairs, 189 based on Foata normal form. 83/3249 useless extension candidates. Maximal degree in co-relation 16004. Up to 1488 conditions per place. [2023-08-27 01:55:25,716 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 142 selfloop transitions, 140 changer transitions 147/429 dead transitions. [2023-08-27 01:55:25,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 429 transitions, 4818 flow [2023-08-27 01:55:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 01:55:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 01:55:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3615 transitions. [2023-08-27 01:55:25,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322915709164445 [2023-08-27 01:55:25,740 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3615 transitions. [2023-08-27 01:55:25,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3615 transitions. [2023-08-27 01:55:25,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:25,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3615 transitions. [2023-08-27 01:55:25,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 84.06976744186046) internal successors, (3615), 43 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:25,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 253.0) internal successors, (11132), 44 states have internal predecessors, (11132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:25,749 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 253.0) internal successors, (11132), 44 states have internal predecessors, (11132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:25,750 INFO L175 Difference]: Start difference. First operand has 226 places, 298 transitions, 3822 flow. Second operand 43 states and 3615 transitions. [2023-08-27 01:55:25,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 429 transitions, 4818 flow [2023-08-27 01:55:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 429 transitions, 4368 flow, removed 138 selfloop flow, removed 48 redundant places. [2023-08-27 01:55:25,799 INFO L231 Difference]: Finished difference. Result has 181 places, 170 transitions, 2610 flow [2023-08-27 01:55:25,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=2610, PETRI_PLACES=181, PETRI_TRANSITIONS=170} [2023-08-27 01:55:25,800 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 156 predicate places. [2023-08-27 01:55:25,800 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 170 transitions, 2610 flow [2023-08-27 01:55:25,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 78.0) internal successors, (1560), 20 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:25,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:25,800 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:25,811 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 01:55:26,005 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 01:55:26,006 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:55:26,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash 2137242011, now seen corresponding path program 13 times [2023-08-27 01:55:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:26,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892746737] [2023-08-27 01:55:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:26,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892746737] [2023-08-27 01:55:26,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892746737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:26,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633245483] [2023-08-27 01:55:26,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:55:26,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:26,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:26,617 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 01:55:26,633 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 01:55:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:26,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:55:26,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:55:26,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:26,943 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:55:26,943 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 01:55:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:55:26,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633245483] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:26,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:26,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 21 [2023-08-27 01:55:26,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079027287] [2023-08-27 01:55:26,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:26,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 01:55:26,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:26,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 01:55:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2023-08-27 01:55:26,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 01:55:26,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 170 transitions, 2610 flow. Second operand has 23 states, 23 states have (on average 77.82608695652173) internal successors, (1790), 23 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:26,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:26,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 01:55:26,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:28,726 INFO L124 PetriNetUnfolderBase]: 2125/4073 cut-off events. [2023-08-27 01:55:28,726 INFO L125 PetriNetUnfolderBase]: For 26323/26323 co-relation queries the response was YES. [2023-08-27 01:55:28,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21374 conditions, 4073 events. 2125/4073 cut-off events. For 26323/26323 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29069 event pairs, 151 based on Foata normal form. 1/4073 useless extension candidates. Maximal degree in co-relation 21319. Up to 1904 conditions per place. [2023-08-27 01:55:28,746 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 178 selfloop transitions, 194 changer transitions 147/519 dead transitions. [2023-08-27 01:55:28,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 519 transitions, 6110 flow [2023-08-27 01:55:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-27 01:55:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-27 01:55:28,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4106 transitions. [2023-08-27 01:55:28,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312091635073002 [2023-08-27 01:55:28,764 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4106 transitions. [2023-08-27 01:55:28,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4106 transitions. [2023-08-27 01:55:28,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:28,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4106 transitions. [2023-08-27 01:55:28,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 83.79591836734694) internal successors, (4106), 49 states have internal predecessors, (4106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:28,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 253.0) internal successors, (12650), 50 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:28,776 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 253.0) internal successors, (12650), 50 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:28,776 INFO L175 Difference]: Start difference. First operand has 181 places, 170 transitions, 2610 flow. Second operand 49 states and 4106 transitions. [2023-08-27 01:55:28,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 519 transitions, 6110 flow [2023-08-27 01:55:28,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 519 transitions, 5673 flow, removed 66 selfloop flow, removed 24 redundant places. [2023-08-27 01:55:28,847 INFO L231 Difference]: Finished difference. Result has 205 places, 220 transitions, 3536 flow [2023-08-27 01:55:28,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=3536, PETRI_PLACES=205, PETRI_TRANSITIONS=220} [2023-08-27 01:55:28,848 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2023-08-27 01:55:28,848 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 220 transitions, 3536 flow [2023-08-27 01:55:28,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 77.82608695652173) internal successors, (1790), 23 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:28,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:28,848 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:28,855 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 01:55:29,052 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 01:55:29,053 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:55:29,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:29,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2132205784, now seen corresponding path program 14 times [2023-08-27 01:55:29,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:29,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944278270] [2023-08-27 01:55:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:55:29,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944278270] [2023-08-27 01:55:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944278270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:29,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601487728] [2023-08-27 01:55:29,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:55:29,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:29,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:29,150 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 01:55:29,172 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 01:55:29,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:55:29,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:29,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 01:55:29,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:55:29,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:55:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601487728] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:29,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:29,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 14 [2023-08-27 01:55:29,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560949271] [2023-08-27 01:55:29,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:29,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 01:55:29,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:29,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 01:55:29,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:55:29,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 01:55:29,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 220 transitions, 3536 flow. Second operand has 15 states, 15 states have (on average 103.93333333333334) internal successors, (1559), 15 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:29,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:29,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 01:55:29,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:30,125 INFO L124 PetriNetUnfolderBase]: 3305/6235 cut-off events. [2023-08-27 01:55:30,125 INFO L125 PetriNetUnfolderBase]: For 50019/50019 co-relation queries the response was YES. [2023-08-27 01:55:30,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33132 conditions, 6235 events. 3305/6235 cut-off events. For 50019/50019 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 47256 event pairs, 649 based on Foata normal form. 30/6264 useless extension candidates. Maximal degree in co-relation 33079. Up to 2810 conditions per place. [2023-08-27 01:55:30,166 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 105 selfloop transitions, 159 changer transitions 66/330 dead transitions. [2023-08-27 01:55:30,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 330 transitions, 6146 flow [2023-08-27 01:55:30,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:55:30,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:55:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 665 transitions. [2023-08-27 01:55:30,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380764163372859 [2023-08-27 01:55:30,167 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 665 transitions. [2023-08-27 01:55:30,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 665 transitions. [2023-08-27 01:55:30,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:30,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 665 transitions. [2023-08-27 01:55:30,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.83333333333333) internal successors, (665), 6 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:30,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:30,169 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:30,169 INFO L175 Difference]: Start difference. First operand has 205 places, 220 transitions, 3536 flow. Second operand 6 states and 665 transitions. [2023-08-27 01:55:30,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 330 transitions, 6146 flow [2023-08-27 01:55:30,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 330 transitions, 5946 flow, removed 80 selfloop flow, removed 10 redundant places. [2023-08-27 01:55:30,279 INFO L231 Difference]: Finished difference. Result has 201 places, 230 transitions, 4496 flow [2023-08-27 01:55:30,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4496, PETRI_PLACES=201, PETRI_TRANSITIONS=230} [2023-08-27 01:55:30,279 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 176 predicate places. [2023-08-27 01:55:30,280 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 230 transitions, 4496 flow [2023-08-27 01:55:30,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 103.93333333333334) internal successors, (1559), 15 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:30,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:30,280 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:30,291 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 01:55:30,491 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 01:55:30,491 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:55:30,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:30,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1530003005, now seen corresponding path program 15 times [2023-08-27 01:55:30,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:30,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097764511] [2023-08-27 01:55:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:30,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:55:31,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097764511] [2023-08-27 01:55:31,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097764511] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:31,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360773352] [2023-08-27 01:55:31,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:55:31,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:31,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:31,081 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 01:55:31,083 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 01:55:31,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:55:31,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:31,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 01:55:31,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:31,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:55:31,451 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:55:31,451 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 10 [2023-08-27 01:55:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:55:31,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:33,660 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:33,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-27 01:55:33,664 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 13 treesize of output 7 [2023-08-27 01:55:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:55:33,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360773352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:33,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:33,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2023-08-27 01:55:33,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37549508] [2023-08-27 01:55:33,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:33,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 01:55:33,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:33,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 01:55:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=765, Unknown=1, NotChecked=0, Total=930 [2023-08-27 01:55:33,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:55:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 230 transitions, 4496 flow. Second operand has 31 states, 31 states have (on average 73.48387096774194) internal successors, (2278), 31 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:33,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:55:33,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:36,738 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 01:55:38,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:55:40,932 WARN L539 Checker$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 01:55:43,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:55:45,021 WARN L539 Checker$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 01:55:47,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:55:49,033 WARN L539 Checker$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 01:55:51,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:55:53,095 WARN L539 Checker$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 01:55:56,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:58,134 WARN L539 Checker$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 01:56:00,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:56:02,142 WARN L539 Checker$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 01:56:10,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:56:12,272 WARN L539 Checker$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 01:56:14,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:56:22,555 WARN L539 Checker$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 01:56:24,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:56:26,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:56:28,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:56:30,583 WARN L539 Checker$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 01:56:32,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:56:35,187 WARN L539 Checker$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 01:56:37,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:56:39,219 WARN L539 Checker$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 01:56:41,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:56:43,482 WARN L539 Checker$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 01:56:45,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:56:47,502 WARN L539 Checker$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 01:56:49,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 01:56:51,623 WARN L539 Checker$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 01:56:53,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:56:55,851 WARN L539 Checker$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 01:56:55,926 INFO L124 PetriNetUnfolderBase]: 3665/6733 cut-off events. [2023-08-27 01:56:55,927 INFO L125 PetriNetUnfolderBase]: For 65414/65414 co-relation queries the response was YES. [2023-08-27 01:56:55,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38863 conditions, 6733 events. 3665/6733 cut-off events. For 65414/65414 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 50714 event pairs, 439 based on Foata normal form. 6/6738 useless extension candidates. Maximal degree in co-relation 38815. Up to 2931 conditions per place. [2023-08-27 01:56:55,959 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 24 selfloop transitions, 15 changer transitions 452/491 dead transitions. [2023-08-27 01:56:55,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 491 transitions, 7955 flow [2023-08-27 01:56:55,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 01:56:55,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 01:56:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2711 transitions. [2023-08-27 01:56:55,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3151592652871425 [2023-08-27 01:56:55,979 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2711 transitions. [2023-08-27 01:56:55,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2711 transitions. [2023-08-27 01:56:55,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:56:55,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2711 transitions. [2023-08-27 01:56:55,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.73529411764706) internal successors, (2711), 34 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:55,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:55,986 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 253.0) internal successors, (8855), 35 states have internal predecessors, (8855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:55,986 INFO L175 Difference]: Start difference. First operand has 201 places, 230 transitions, 4496 flow. Second operand 34 states and 2711 transitions. [2023-08-27 01:56:55,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 491 transitions, 7955 flow [2023-08-27 01:56:56,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 491 transitions, 6773 flow, removed 359 selfloop flow, removed 31 redundant places. [2023-08-27 01:56:56,096 INFO L231 Difference]: Finished difference. Result has 167 places, 31 transitions, 415 flow [2023-08-27 01:56:56,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=415, PETRI_PLACES=167, PETRI_TRANSITIONS=31} [2023-08-27 01:56:56,097 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 142 predicate places. [2023-08-27 01:56:56,097 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 31 transitions, 415 flow [2023-08-27 01:56:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 73.48387096774194) internal successors, (2278), 31 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:56,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:56:56,097 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:56:56,102 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 01:56:56,302 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 01:56:56,302 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:56:56,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:56:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -491154748, now seen corresponding path program 16 times [2023-08-27 01:56:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:56:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646543811] [2023-08-27 01:56:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:56:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:56:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:56:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:56:56,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:56:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646543811] [2023-08-27 01:56:56,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646543811] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:56:56,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469289267] [2023-08-27 01:56:56,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:56:56,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:56:56,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:56:56,836 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 01:56:56,837 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 01:56:56,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:56:56,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:56:56,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:56:56,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:56:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:56:57,348 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 01:56:57,481 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:56:57,481 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 10 [2023-08-27 01:56:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:56:57,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:56:57,570 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_745 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_745) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)) is different from false [2023-08-27 01:56:57,658 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:56:57,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:56:57,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:56:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-08-27 01:56:58,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469289267] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:56:58,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:56:58,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-08-27 01:56:58,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396522522] [2023-08-27 01:56:58,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:56:58,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-27 01:56:58,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:56:58,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-27 01:56:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1880, Unknown=1, NotChecked=90, Total=2256 [2023-08-27 01:56:58,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:56:58,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 31 transitions, 415 flow. Second operand has 48 states, 48 states have (on average 73.4375) internal successors, (3525), 48 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:58,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:56:58,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:56:58,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:57:40,386 INFO L124 PetriNetUnfolderBase]: 1591/2949 cut-off events. [2023-08-27 01:57:40,386 INFO L125 PetriNetUnfolderBase]: For 42677/42677 co-relation queries the response was YES. [2023-08-27 01:57:40,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17618 conditions, 2949 events. 1591/2949 cut-off events. For 42677/42677 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15733 event pairs, 42 based on Foata normal form. 37/2984 useless extension candidates. Maximal degree in co-relation 17571. Up to 1207 conditions per place. [2023-08-27 01:57:40,400 INFO L140 encePairwiseOnDemand]: 244/253 looper letters, 514 selfloop transitions, 236 changer transitions 123/873 dead transitions. [2023-08-27 01:57:40,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 873 transitions, 10144 flow [2023-08-27 01:57:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2023-08-27 01:57:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2023-08-27 01:57:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 9180 transitions. [2023-08-27 01:57:40,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3155181302629318 [2023-08-27 01:57:40,407 INFO L72 ComplementDD]: Start complementDD. Operand 115 states and 9180 transitions. [2023-08-27 01:57:40,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 9180 transitions. [2023-08-27 01:57:40,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:57:40,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 115 states and 9180 transitions. [2023-08-27 01:57:40,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 116 states, 115 states have (on average 79.82608695652173) internal successors, (9180), 115 states have internal predecessors, (9180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:57:40,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 116 states, 116 states have (on average 253.0) internal successors, (29348), 116 states have internal predecessors, (29348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:57:40,443 INFO L81 ComplementDD]: Finished complementDD. Result has 116 states, 116 states have (on average 253.0) internal successors, (29348), 116 states have internal predecessors, (29348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:57:40,443 INFO L175 Difference]: Start difference. First operand has 167 places, 31 transitions, 415 flow. Second operand 115 states and 9180 transitions. [2023-08-27 01:57:40,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 873 transitions, 10144 flow [2023-08-27 01:57:40,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 873 transitions, 6125 flow, removed 1913 selfloop flow, removed 58 redundant places. [2023-08-27 01:57:40,485 INFO L231 Difference]: Finished difference. Result has 220 places, 280 transitions, 3133 flow [2023-08-27 01:57:40,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=115, PETRI_FLOW=3133, PETRI_PLACES=220, PETRI_TRANSITIONS=280} [2023-08-27 01:57:40,485 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 195 predicate places. [2023-08-27 01:57:40,485 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 280 transitions, 3133 flow [2023-08-27 01:57:40,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 73.4375) internal successors, (3525), 48 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:57:40,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:57:40,486 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:57:40,491 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 01:57:40,690 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 01:57:40,691 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:57:40,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:57:40,691 INFO L85 PathProgramCache]: Analyzing trace with hash -684969304, now seen corresponding path program 17 times [2023-08-27 01:57:40,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:57:40,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086219817] [2023-08-27 01:57:40,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:57:40,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:57:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:57:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:57:41,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:57:41,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086219817] [2023-08-27 01:57:41,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086219817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:57:41,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382873428] [2023-08-27 01:57:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:57:41,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:57:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:57:41,349 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 01:57:41,351 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 01:57:41,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 01:57:41,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:57:41,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 01:57:41,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:57:41,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:57:41,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 01:57:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:57:41,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:57:42,231 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:57:42,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:57:42,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:57:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:57:42,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382873428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:57:42,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:57:42,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-27 01:57:42,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123365296] [2023-08-27 01:57:42,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:57:42,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-27 01:57:42,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:57:42,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-27 01:57:42,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2216, Unknown=0, NotChecked=0, Total=2550 [2023-08-27 01:57:42,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:57:42,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 280 transitions, 3133 flow. Second operand has 51 states, 51 states have (on average 73.41176470588235) internal successors, (3744), 51 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:57:42,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:57:42,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:57:42,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:58:15,373 INFO L124 PetriNetUnfolderBase]: 16173/29844 cut-off events. [2023-08-27 01:58:15,374 INFO L125 PetriNetUnfolderBase]: For 1977273/1977273 co-relation queries the response was YES. [2023-08-27 01:58:15,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312170 conditions, 29844 events. 16173/29844 cut-off events. For 1977273/1977273 co-relation queries the response was YES. Maximal size of possible extension queue 895. Compared 253783 event pairs, 1582 based on Foata normal form. 340/30177 useless extension candidates. Maximal degree in co-relation 312093. Up to 12082 conditions per place. [2023-08-27 01:58:15,681 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 2609 selfloop transitions, 1575 changer transitions 329/4513 dead transitions. [2023-08-27 01:58:15,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 4513 transitions, 83083 flow [2023-08-27 01:58:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 294 states. [2023-08-27 01:58:15,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2023-08-27 01:58:15,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 23701 transitions. [2023-08-27 01:58:15,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31863891801780003 [2023-08-27 01:58:15,697 INFO L72 ComplementDD]: Start complementDD. Operand 294 states and 23701 transitions. [2023-08-27 01:58:15,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 294 states and 23701 transitions. [2023-08-27 01:58:15,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:58:15,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 294 states and 23701 transitions. [2023-08-27 01:58:15,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 295 states, 294 states have (on average 80.6156462585034) internal successors, (23701), 294 states have internal predecessors, (23701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:15,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 295 states, 295 states have (on average 253.0) internal successors, (74635), 295 states have internal predecessors, (74635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:15,788 INFO L81 ComplementDD]: Finished complementDD. Result has 295 states, 295 states have (on average 253.0) internal successors, (74635), 295 states have internal predecessors, (74635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:15,788 INFO L175 Difference]: Start difference. First operand has 220 places, 280 transitions, 3133 flow. Second operand 294 states and 23701 transitions. [2023-08-27 01:58:15,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 4513 transitions, 83083 flow [2023-08-27 01:58:18,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 4513 transitions, 54860 flow, removed 14099 selfloop flow, removed 27 redundant places. [2023-08-27 01:58:18,239 INFO L231 Difference]: Finished difference. Result has 591 places, 1823 transitions, 18402 flow [2023-08-27 01:58:18,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1345, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=294, PETRI_FLOW=18402, PETRI_PLACES=591, PETRI_TRANSITIONS=1823} [2023-08-27 01:58:18,239 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 566 predicate places. [2023-08-27 01:58:18,239 INFO L495 AbstractCegarLoop]: Abstraction has has 591 places, 1823 transitions, 18402 flow [2023-08-27 01:58:18,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 73.41176470588235) internal successors, (3744), 51 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:18,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:58:18,240 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:58:18,245 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 01:58:18,444 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 01:58:18,445 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:58:18,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:58:18,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1102333093, now seen corresponding path program 18 times [2023-08-27 01:58:18,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:58:18,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108338710] [2023-08-27 01:58:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:58:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:58:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:58:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:58:19,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:58:19,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108338710] [2023-08-27 01:58:19,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108338710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:58:19,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254790250] [2023-08-27 01:58:19,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:58:19,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:58:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:58:19,945 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 01:58:19,946 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 01:58:20,173 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 01:58:20,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:58:20,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 01:58:20,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:58:20,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:58:20,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 01:58:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 01:58:20,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:58:20,529 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_843 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_843) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-08-27 01:58:20,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:58:20,551 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:58:20,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:58:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 5 not checked. [2023-08-27 01:58:20,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254790250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:58:20,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:58:20,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 9] total 34 [2023-08-27 01:58:20,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708280982] [2023-08-27 01:58:20,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:58:20,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 01:58:20,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:58:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 01:58:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1087, Unknown=1, NotChecked=66, Total=1260 [2023-08-27 01:58:20,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:58:20,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 591 places, 1823 transitions, 18402 flow. Second operand has 36 states, 36 states have (on average 73.55555555555556) internal successors, (2648), 36 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:20,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:58:20,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:58:20,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:58:34,574 INFO L124 PetriNetUnfolderBase]: 16333/30152 cut-off events. [2023-08-27 01:58:34,574 INFO L125 PetriNetUnfolderBase]: For 4480938/4480938 co-relation queries the response was YES. [2023-08-27 01:58:35,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263322 conditions, 30152 events. 16333/30152 cut-off events. For 4480938/4480938 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 257367 event pairs, 5859 based on Foata normal form. 2/30153 useless extension candidates. Maximal degree in co-relation 263129. Up to 29329 conditions per place. [2023-08-27 01:58:35,194 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 1830 selfloop transitions, 60 changer transitions 31/1921 dead transitions. [2023-08-27 01:58:35,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1921 transitions, 23222 flow [2023-08-27 01:58:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:58:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:58:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2132 transitions. [2023-08-27 01:58:35,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30095990965556185 [2023-08-27 01:58:35,196 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2132 transitions. [2023-08-27 01:58:35,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2132 transitions. [2023-08-27 01:58:35,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:58:35,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2132 transitions. [2023-08-27 01:58:35,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 76.14285714285714) internal successors, (2132), 28 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:35,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 253.0) internal successors, (7337), 29 states have internal predecessors, (7337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:35,202 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 253.0) internal successors, (7337), 29 states have internal predecessors, (7337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:35,202 INFO L175 Difference]: Start difference. First operand has 591 places, 1823 transitions, 18402 flow. Second operand 28 states and 2132 transitions. [2023-08-27 01:58:35,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1921 transitions, 23222 flow [2023-08-27 01:59:19,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1921 transitions, 21133 flow, removed 885 selfloop flow, removed 25 redundant places. [2023-08-27 01:59:19,213 INFO L231 Difference]: Finished difference. Result has 599 places, 1846 transitions, 16730 flow [2023-08-27 01:59:19,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=16348, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1823, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=16730, PETRI_PLACES=599, PETRI_TRANSITIONS=1846} [2023-08-27 01:59:19,214 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 574 predicate places. [2023-08-27 01:59:19,214 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 1846 transitions, 16730 flow [2023-08-27 01:59:19,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 73.55555555555556) internal successors, (2648), 36 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:19,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:19,215 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:19,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-27 01:59:19,419 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 01:59:19,419 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 01:59:19,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:19,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1112830978, now seen corresponding path program 19 times [2023-08-27 01:59:19,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:19,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998717253] [2023-08-27 01:59:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:19,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:20,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998717253] [2023-08-27 01:59:20,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998717253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098894244] [2023-08-27 01:59:20,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:59:20,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:20,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:20,189 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 01:59:20,191 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 01:59:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:20,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 01:59:20,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:20,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:59:20,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 01:59:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:20,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:21,159 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:59:21,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 01:59:21,168 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:59:21,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:21,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098894244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:21,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:21,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-08-27 01:59:21,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737026101] [2023-08-27 01:59:21,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:21,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-08-27 01:59:21,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:21,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-08-27 01:59:21,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2618, Unknown=5, NotChecked=0, Total=2862 [2023-08-27 01:59:21,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 01:59:21,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 1846 transitions, 16730 flow. Second operand has 54 states, 54 states have (on average 73.38888888888889) internal successors, (3963), 54 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:21,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:21,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 01:59:21,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:59:23,004 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_890 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_890) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)) 5)) (= 5 c_~x~0)) is different from false [2023-08-27 01:59:51,117 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (and (forall ((v_ArrVal_890 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_890) c_~queue~0.base) (+ c_~queue~0.offset .cse0 16)) 5)) (= 5 (select (select |c_#memory_int| c_~queue~0.base) .cse0)) (= c_~queue~0.offset 0) (= 5 c_~x~0))) is different from false [2023-08-27 02:00:05,853 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~front~0 4))) (and (forall ((v_ArrVal_890 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_890) c_~queue~0.base) (+ c_~queue~0.offset .cse0 16)) 5)) (= 5 (select (select |c_#memory_int| c_~queue~0.base) .cse0)) (= c_~queue~0.offset 0))) is different from false