/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 14:49:11,994 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 14:49:12,065 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 [2023-08-24 14:49:12,071 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 14:49:12,071 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 14:49:12,100 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 14:49:12,101 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 14:49:12,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 14:49:12,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 14:49:12,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 14:49:12,107 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 14:49:12,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 14:49:12,108 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 14:49:12,108 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 14:49:12,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 14:49:12,109 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 14:49:12,109 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 14:49:12,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 14:49:12,110 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 14:49:12,110 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 14:49:12,110 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 14:49:12,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 14:49:12,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 14:49:12,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 14:49:12,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 14:49:12,117 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 14:49:12,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 14:49:12,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:49:12,118 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 14:49:12,118 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 14:49:12,119 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 14:49:12,119 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 14:49:12,119 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 14:49:12,120 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 14:49:12,120 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 14:49:12,120 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 14:49:12,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 14:49:12,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 14:49:12,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 14:49:12,465 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 14:49:12,465 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 14:49:12,467 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-24 14:49:13,691 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 14:49:13,934 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 14:49:13,935 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-24 14:49:13,943 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ccb1051f/b981458e371c4a238e806bb6950757c0/FLAGdb3966238 [2023-08-24 14:49:13,959 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ccb1051f/b981458e371c4a238e806bb6950757c0 [2023-08-24 14:49:13,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 14:49:13,965 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 14:49:13,969 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 14:49:13,970 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 14:49:13,972 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 14:49:13,973 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:49:13" (1/1) ... [2023-08-24 14:49:13,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d602e73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:13, skipping insertion in model container [2023-08-24 14:49:13,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:49:13" (1/1) ... [2023-08-24 14:49:14,000 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 14:49:14,189 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2023-08-24 14:49:14,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:49:14,208 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 14:49:14,246 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c[2865,2878] [2023-08-24 14:49:14,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 14:49:14,258 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:49:14,258 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 14:49:14,263 INFO L206 MainTranslator]: Completed translation [2023-08-24 14:49:14,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14 WrapperNode [2023-08-24 14:49:14,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 14:49:14,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 14:49:14,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 14:49:14,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 14:49:14,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,280 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,303 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 288 [2023-08-24 14:49:14,304 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 14:49:14,304 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 14:49:14,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 14:49:14,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 14:49:14,312 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,316 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,316 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,324 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,328 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,330 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,332 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,335 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 14:49:14,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 14:49:14,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 14:49:14,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 14:49:14,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (1/1) ... [2023-08-24 14:49:14,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 14:49:14,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:14,382 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) [2023-08-24 14:49:14,413 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 [2023-08-24 14:49:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 14:49:14,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 14:49:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 14:49:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 14:49:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 14:49:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 14:49:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 14:49:14,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 14:49:14,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 14:49:14,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 14:49:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 14:49:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 14:49:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 14:49:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 14:49:14,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 14:49:14,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 14:49:14,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 14:49:14,431 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 14:49:14,554 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 14:49:14,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 14:49:14,923 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 14:49:15,064 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 14:49:15,073 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-24 14:49:15,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:49:15 BoogieIcfgContainer [2023-08-24 14:49:15,075 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 14:49:15,077 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 14:49:15,077 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 14:49:15,079 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 14:49:15,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:49:13" (1/3) ... [2023-08-24 14:49:15,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e3174b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:49:15, skipping insertion in model container [2023-08-24 14:49:15,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:49:14" (2/3) ... [2023-08-24 14:49:15,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74e3174b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:49:15, skipping insertion in model container [2023-08-24 14:49:15,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:49:15" (3/3) ... [2023-08-24 14:49:15,082 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-08-24 14:49:15,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 14:49:15,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 14:49:15,100 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 14:49:15,214 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 14:49:15,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 247 transitions, 518 flow [2023-08-24 14:49:15,380 INFO L124 PetriNetUnfolderBase]: 25/244 cut-off events. [2023-08-24 14:49:15,380 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:49:15,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 244 events. 25/244 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 329 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 188. Up to 2 conditions per place. [2023-08-24 14:49:15,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 247 transitions, 518 flow [2023-08-24 14:49:15,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 234 transitions, 486 flow [2023-08-24 14:49:15,400 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 14:49:15,411 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 234 transitions, 486 flow [2023-08-24 14:49:15,413 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 234 transitions, 486 flow [2023-08-24 14:49:15,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-08-24 14:49:15,491 INFO L124 PetriNetUnfolderBase]: 25/234 cut-off events. [2023-08-24 14:49:15,491 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:49:15,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 234 events. 25/234 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 326 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 188. Up to 2 conditions per place. [2023-08-24 14:49:15,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-24 14:49:22,568 INFO L134 LiptonReduction]: Checked pairs total: 8849 [2023-08-24 14:49:22,569 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-24 14:49:22,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 14:49:22,586 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;@6390fb32, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 14:49:22,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 14:49:22,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 14:49:22,592 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2023-08-24 14:49:22,592 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 14:49:22,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:22,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:22,594 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:22,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash 886933208, now seen corresponding path program 1 times [2023-08-24 14:49:22,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135132312] [2023-08-24 14:49:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:49:23,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:23,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135132312] [2023-08-24 14:49:23,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135132312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:23,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:23,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:49:23,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879720418] [2023-08-24 14:49:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:23,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 14:49:23,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:23,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 14:49:23,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 14:49:23,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 502 [2023-08-24 14:49:23,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:23,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 502 [2023-08-24 14:49:23,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:23,359 INFO L124 PetriNetUnfolderBase]: 1162/1537 cut-off events. [2023-08-24 14:49:23,359 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-24 14:49:23,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1537 events. 1162/1537 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5479 event pairs, 394 based on Foata normal form. 0/1017 useless extension candidates. Maximal degree in co-relation 2710. Up to 899 conditions per place. [2023-08-24 14:49:23,370 INFO L140 encePairwiseOnDemand]: 497/502 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-24 14:49:23,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2023-08-24 14:49:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:49:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:49:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-08-24 14:49:23,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426792828685259 [2023-08-24 14:49:23,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-08-24 14:49:23,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-08-24 14:49:23,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:23,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-08-24 14:49:23,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,402 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,403 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 857 transitions. [2023-08-24 14:49:23,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2023-08-24 14:49:23,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 50 transitions, 204 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 14:49:23,409 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-08-24 14:49:23,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=35, PETRI_TRANSITIONS=35} [2023-08-24 14:49:23,414 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-24 14:49:23,414 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-08-24 14:49:23,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 206.75) internal successors, (827), 4 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:23,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:23,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 14:49:23,415 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:23,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1079212789, now seen corresponding path program 1 times [2023-08-24 14:49:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:23,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577696642] [2023-08-24 14:49:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:23,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 14:49:23,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:23,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577696642] [2023-08-24 14:49:23,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577696642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:23,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:23,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 14:49:23,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072297658] [2023-08-24 14:49:23,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:23,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:49:23,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:23,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:49:23,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 14:49:23,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 502 [2023-08-24 14:49:23,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 35 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:23,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 502 [2023-08-24 14:49:23,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:23,942 INFO L124 PetriNetUnfolderBase]: 1163/1540 cut-off events. [2023-08-24 14:49:23,942 INFO L125 PetriNetUnfolderBase]: For 296/296 co-relation queries the response was YES. [2023-08-24 14:49:23,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3609 conditions, 1540 events. 1163/1540 cut-off events. For 296/296 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5335 event pairs, 644 based on Foata normal form. 1/1145 useless extension candidates. Maximal degree in co-relation 832. Up to 1534 conditions per place. [2023-08-24 14:49:23,952 INFO L140 encePairwiseOnDemand]: 498/502 looper letters, 32 selfloop transitions, 2 changer transitions 2/38 dead transitions. [2023-08-24 14:49:23,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 173 flow [2023-08-24 14:49:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 14:49:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 14:49:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-24 14:49:23,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37250996015936255 [2023-08-24 14:49:23,956 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-24 14:49:23,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-24 14:49:23,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:23,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-24 14:49:23,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.0) internal successors, (748), 4 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,964 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 502.0) internal successors, (2510), 5 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,964 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 4 states and 748 transitions. [2023-08-24 14:49:23,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 173 flow [2023-08-24 14:49:23,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 38 transitions, 169 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 14:49:23,969 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 105 flow [2023-08-24 14:49:23,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2023-08-24 14:49:23,971 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-24 14:49:23,972 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 105 flow [2023-08-24 14:49:23,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 182.2) internal successors, (911), 5 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:23,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:23,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:23,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 14:49:23,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:23,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:23,982 INFO L85 PathProgramCache]: Analyzing trace with hash 287113945, now seen corresponding path program 1 times [2023-08-24 14:49:23,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:23,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857143151] [2023-08-24 14:49:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:23,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:24,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857143151] [2023-08-24 14:49:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857143151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221018860] [2023-08-24 14:49:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:24,125 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) [2023-08-24 14:49:24,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 14:49:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:24,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 14:49:24,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:24,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221018860] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:24,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 14:49:24,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 14:49:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450247650] [2023-08-24 14:49:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:24,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 14:49:24,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 14:49:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 14:49:24,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 502 [2023-08-24 14:49:24,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 105 flow. Second operand has 5 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:24,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:24,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 502 [2023-08-24 14:49:24,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:24,562 INFO L124 PetriNetUnfolderBase]: 1076/1448 cut-off events. [2023-08-24 14:49:24,562 INFO L125 PetriNetUnfolderBase]: For 164/276 co-relation queries the response was YES. [2023-08-24 14:49:24,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 1448 events. 1076/1448 cut-off events. For 164/276 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4918 event pairs, 364 based on Foata normal form. 112/1243 useless extension candidates. Maximal degree in co-relation 3291. Up to 725 conditions per place. [2023-08-24 14:49:24,570 INFO L140 encePairwiseOnDemand]: 496/502 looper letters, 45 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-08-24 14:49:24,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 249 flow [2023-08-24 14:49:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:49:24,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:49:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 959 transitions. [2023-08-24 14:49:24,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38207171314741034 [2023-08-24 14:49:24,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 959 transitions. [2023-08-24 14:49:24,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 959 transitions. [2023-08-24 14:49:24,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:24,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 959 transitions. [2023-08-24 14:49:24,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 191.8) internal successors, (959), 5 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:24,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:24,581 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:24,581 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 105 flow. Second operand 5 states and 959 transitions. [2023-08-24 14:49:24,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 249 flow [2023-08-24 14:49:24,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 52 transitions, 243 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 14:49:24,583 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 122 flow [2023-08-24 14:49:24,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-24 14:49:24,584 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-24 14:49:24,584 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 122 flow [2023-08-24 14:49:24,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 186.4) internal successors, (932), 5 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:24,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:24,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:24,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 14:49:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:24,791 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:24,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:24,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1052394200, now seen corresponding path program 1 times [2023-08-24 14:49:24,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:24,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039477519] [2023-08-24 14:49:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:24,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:24,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:24,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039477519] [2023-08-24 14:49:24,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039477519] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:24,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:24,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 14:49:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044927339] [2023-08-24 14:49:24,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 14:49:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 14:49:24,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 14:49:24,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 502 [2023-08-24 14:49:24,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:24,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:24,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 502 [2023-08-24 14:49:24,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:25,185 INFO L124 PetriNetUnfolderBase]: 1837/2470 cut-off events. [2023-08-24 14:49:25,185 INFO L125 PetriNetUnfolderBase]: For 949/1319 co-relation queries the response was YES. [2023-08-24 14:49:25,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6245 conditions, 2470 events. 1837/2470 cut-off events. For 949/1319 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 9743 event pairs, 522 based on Foata normal form. 371/2479 useless extension candidates. Maximal degree in co-relation 6224. Up to 1390 conditions per place. [2023-08-24 14:49:25,200 INFO L140 encePairwiseOnDemand]: 497/502 looper letters, 55 selfloop transitions, 4 changer transitions 1/63 dead transitions. [2023-08-24 14:49:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 63 transitions, 321 flow [2023-08-24 14:49:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 14:49:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 14:49:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-08-24 14:49:25,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46945551128818064 [2023-08-24 14:49:25,203 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-08-24 14:49:25,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-08-24 14:49:25,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:25,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-08-24 14:49:25,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:25,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:25,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 502.0) internal successors, (2008), 4 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:25,208 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 122 flow. Second operand 3 states and 707 transitions. [2023-08-24 14:49:25,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 63 transitions, 321 flow [2023-08-24 14:49:25,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 63 transitions, 313 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 14:49:25,216 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 142 flow [2023-08-24 14:49:25,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-24 14:49:25,217 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-24 14:49:25,217 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 142 flow [2023-08-24 14:49:25,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 224.66666666666666) internal successors, (674), 3 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:25,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:25,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:25,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 14:49:25,218 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:25,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:25,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1767380419, now seen corresponding path program 1 times [2023-08-24 14:49:25,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:25,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329666869] [2023-08-24 14:49:25,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:25,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:25,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:25,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329666869] [2023-08-24 14:49:25,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329666869] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:25,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:25,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 14:49:25,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650180845] [2023-08-24 14:49:25,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:25,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 14:49:25,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:25,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 14:49:25,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 14:49:25,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 502 [2023-08-24 14:49:25,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 166.16666666666666) internal successors, (997), 6 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:25,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:25,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 502 [2023-08-24 14:49:25,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:25,985 INFO L124 PetriNetUnfolderBase]: 4237/5709 cut-off events. [2023-08-24 14:49:25,985 INFO L125 PetriNetUnfolderBase]: For 2809/3253 co-relation queries the response was YES. [2023-08-24 14:49:25,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15212 conditions, 5709 events. 4237/5709 cut-off events. For 2809/3253 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 25595 event pairs, 2344 based on Foata normal form. 566/5452 useless extension candidates. Maximal degree in co-relation 15190. Up to 2930 conditions per place. [2023-08-24 14:49:26,021 INFO L140 encePairwiseOnDemand]: 496/502 looper letters, 82 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-08-24 14:49:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 90 transitions, 483 flow [2023-08-24 14:49:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 14:49:26,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 14:49:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 886 transitions. [2023-08-24 14:49:26,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529880478087649 [2023-08-24 14:49:26,024 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 886 transitions. [2023-08-24 14:49:26,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 886 transitions. [2023-08-24 14:49:26,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:26,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 886 transitions. [2023-08-24 14:49:26,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 177.2) internal successors, (886), 5 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:26,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:26,031 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 502.0) internal successors, (3012), 6 states have internal predecessors, (3012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:26,031 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 142 flow. Second operand 5 states and 886 transitions. [2023-08-24 14:49:26,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 90 transitions, 483 flow [2023-08-24 14:49:26,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 90 transitions, 475 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 14:49:26,043 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 194 flow [2023-08-24 14:49:26,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-24 14:49:26,044 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2023-08-24 14:49:26,044 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 194 flow [2023-08-24 14:49:26,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.16666666666666) internal successors, (997), 6 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:26,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:26,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:26,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 14:49:26,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:26,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:26,046 INFO L85 PathProgramCache]: Analyzing trace with hash 895338130, now seen corresponding path program 1 times [2023-08-24 14:49:26,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:26,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645917830] [2023-08-24 14:49:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:26,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645917830] [2023-08-24 14:49:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645917830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:26,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911188252] [2023-08-24 14:49:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:26,275 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) [2023-08-24 14:49:26,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 14:49:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:26,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 14:49:26,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:26,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:26,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-08-24 14:49:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:26,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911188252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:49:26,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:49:26,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-24 14:49:26,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47167003] [2023-08-24 14:49:26,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:49:26,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 14:49:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:26,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 14:49:26,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-24 14:49:26,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 502 [2023-08-24 14:49:26,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 194 flow. Second operand has 13 states, 13 states have (on average 164.84615384615384) internal successors, (2143), 13 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:26,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:26,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 502 [2023-08-24 14:49:26,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:27,476 INFO L124 PetriNetUnfolderBase]: 6282/8486 cut-off events. [2023-08-24 14:49:27,477 INFO L125 PetriNetUnfolderBase]: For 5423/6083 co-relation queries the response was YES. [2023-08-24 14:49:27,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23702 conditions, 8486 events. 6282/8486 cut-off events. For 5423/6083 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 40767 event pairs, 3390 based on Foata normal form. 782/8036 useless extension candidates. Maximal degree in co-relation 23676. Up to 4348 conditions per place. [2023-08-24 14:49:27,529 INFO L140 encePairwiseOnDemand]: 496/502 looper letters, 82 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-08-24 14:49:27,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 551 flow [2023-08-24 14:49:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:49:27,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:49:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1050 transitions. [2023-08-24 14:49:27,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34860557768924305 [2023-08-24 14:49:27,533 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1050 transitions. [2023-08-24 14:49:27,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1050 transitions. [2023-08-24 14:49:27,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:27,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1050 transitions. [2023-08-24 14:49:27,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 175.0) internal successors, (1050), 6 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:27,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:27,540 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:27,540 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 194 flow. Second operand 6 states and 1050 transitions. [2023-08-24 14:49:27,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 551 flow [2023-08-24 14:49:27,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 95 transitions, 547 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 14:49:27,566 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 273 flow [2023-08-24 14:49:27,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-24 14:49:27,566 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2023-08-24 14:49:27,567 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 273 flow [2023-08-24 14:49:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 164.84615384615384) internal successors, (2143), 13 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:27,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:27,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:27,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 14:49:27,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 14:49:27,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:27,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:27,774 INFO L85 PathProgramCache]: Analyzing trace with hash 707650262, now seen corresponding path program 1 times [2023-08-24 14:49:27,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:27,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808643236] [2023-08-24 14:49:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:27,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 14:49:28,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:28,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808643236] [2023-08-24 14:49:28,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808643236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:28,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:28,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:49:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179340679] [2023-08-24 14:49:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:28,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:49:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:28,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:49:28,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:49:28,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 502 [2023-08-24 14:49:28,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 273 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:28,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:28,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 502 [2023-08-24 14:49:28,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:29,036 INFO L124 PetriNetUnfolderBase]: 6192/8451 cut-off events. [2023-08-24 14:49:29,036 INFO L125 PetriNetUnfolderBase]: For 13228/13922 co-relation queries the response was YES. [2023-08-24 14:49:29,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26521 conditions, 8451 events. 6192/8451 cut-off events. For 13228/13922 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41647 event pairs, 3598 based on Foata normal form. 795/8016 useless extension candidates. Maximal degree in co-relation 26491. Up to 5466 conditions per place. [2023-08-24 14:49:29,089 INFO L140 encePairwiseOnDemand]: 494/502 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-24 14:49:29,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 615 flow [2023-08-24 14:49:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:49:29,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:49:29,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 999 transitions. [2023-08-24 14:49:29,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33167330677290835 [2023-08-24 14:49:29,093 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 999 transitions. [2023-08-24 14:49:29,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 999 transitions. [2023-08-24 14:49:29,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:29,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 999 transitions. [2023-08-24 14:49:29,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:29,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:29,100 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:29,100 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 273 flow. Second operand 6 states and 999 transitions. [2023-08-24 14:49:29,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 615 flow [2023-08-24 14:49:29,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 93 transitions, 594 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-24 14:49:29,121 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 303 flow [2023-08-24 14:49:29,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-08-24 14:49:29,122 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-24 14:49:29,122 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 303 flow [2023-08-24 14:49:29,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:29,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:29,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:29,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 14:49:29,124 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:29,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1629824642, now seen corresponding path program 2 times [2023-08-24 14:49:29,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:29,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636254487] [2023-08-24 14:49:29,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:29,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:29,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:29,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:29,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:29,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636254487] [2023-08-24 14:49:29,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636254487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:29,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:29,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 14:49:29,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866839887] [2023-08-24 14:49:29,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:29,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 14:49:29,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 14:49:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 14:49:29,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 502 [2023-08-24 14:49:29,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 303 flow. Second operand has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:29,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:29,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 502 [2023-08-24 14:49:29,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:30,315 INFO L124 PetriNetUnfolderBase]: 6436/8794 cut-off events. [2023-08-24 14:49:30,315 INFO L125 PetriNetUnfolderBase]: For 15840/16554 co-relation queries the response was YES. [2023-08-24 14:49:30,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28999 conditions, 8794 events. 6436/8794 cut-off events. For 15840/16554 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43473 event pairs, 3634 based on Foata normal form. 795/8310 useless extension candidates. Maximal degree in co-relation 28966. Up to 5466 conditions per place. [2023-08-24 14:49:30,367 INFO L140 encePairwiseOnDemand]: 494/502 looper letters, 85 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-08-24 14:49:30,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 663 flow [2023-08-24 14:49:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:49:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:49:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 999 transitions. [2023-08-24 14:49:30,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33167330677290835 [2023-08-24 14:49:30,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 999 transitions. [2023-08-24 14:49:30,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 999 transitions. [2023-08-24 14:49:30,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:30,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 999 transitions. [2023-08-24 14:49:30,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:30,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:30,380 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:30,380 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 303 flow. Second operand 6 states and 999 transitions. [2023-08-24 14:49:30,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 663 flow [2023-08-24 14:49:30,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 96 transitions, 656 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 14:49:30,413 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 345 flow [2023-08-24 14:49:30,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-24 14:49:30,415 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-08-24 14:49:30,416 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 345 flow [2023-08-24 14:49:30,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.25) internal successors, (1258), 8 states have internal predecessors, (1258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:30,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:30,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:30,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 14:49:30,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:30,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:30,419 INFO L85 PathProgramCache]: Analyzing trace with hash -206341686, now seen corresponding path program 3 times [2023-08-24 14:49:30,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:30,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558165140] [2023-08-24 14:49:30,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:30,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558165140] [2023-08-24 14:49:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558165140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 14:49:30,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 14:49:30,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 14:49:30,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151467243] [2023-08-24 14:49:30,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 14:49:30,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 14:49:30,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 14:49:30,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-24 14:49:30,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 502 [2023-08-24 14:49:30,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 153.88888888888889) internal successors, (1385), 9 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:30,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:30,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 502 [2023-08-24 14:49:30,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:31,683 INFO L124 PetriNetUnfolderBase]: 5942/8166 cut-off events. [2023-08-24 14:49:31,684 INFO L125 PetriNetUnfolderBase]: For 18169/18829 co-relation queries the response was YES. [2023-08-24 14:49:31,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27980 conditions, 8166 events. 5942/8166 cut-off events. For 18169/18829 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40096 event pairs, 3407 based on Foata normal form. 741/7729 useless extension candidates. Maximal degree in co-relation 27946. Up to 5466 conditions per place. [2023-08-24 14:49:31,801 INFO L140 encePairwiseOnDemand]: 495/502 looper letters, 80 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-08-24 14:49:31,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 665 flow [2023-08-24 14:49:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 14:49:31,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 14:49:31,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 978 transitions. [2023-08-24 14:49:31,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3247011952191235 [2023-08-24 14:49:31,804 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 978 transitions. [2023-08-24 14:49:31,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 978 transitions. [2023-08-24 14:49:31,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:31,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 978 transitions. [2023-08-24 14:49:31,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:31,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:31,811 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 502.0) internal successors, (3514), 7 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:31,811 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 345 flow. Second operand 6 states and 978 transitions. [2023-08-24 14:49:31,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 665 flow [2023-08-24 14:49:31,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 92 transitions, 658 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 14:49:31,842 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 377 flow [2023-08-24 14:49:31,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-24 14:49:31,843 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-08-24 14:49:31,843 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 377 flow [2023-08-24 14:49:31,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 153.88888888888889) internal successors, (1385), 9 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:31,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:31,844 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:31,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 14:49:31,844 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:31,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash -317186615, now seen corresponding path program 2 times [2023-08-24 14:49:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117741500] [2023-08-24 14:49:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:32,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117741500] [2023-08-24 14:49:32,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117741500] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:32,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583263603] [2023-08-24 14:49:32,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 14:49:32,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:32,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:32,693 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) [2023-08-24 14:49:32,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 14:49:32,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 14:49:32,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:49:32,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 14:49:32,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:33,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:49:33,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 14:49:33,277 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 14:49:33,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 11 [2023-08-24 14:49:33,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:33,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:33,543 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:33,543 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 41 treesize of output 33 [2023-08-24 14:49:33,548 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 [2023-08-24 14:49:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:33,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583263603] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:49:33,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:49:33,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 14:49:33,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167177269] [2023-08-24 14:49:33,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:49:33,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 14:49:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 14:49:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2023-08-24 14:49:33,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 502 [2023-08-24 14:49:33,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 377 flow. Second operand has 41 states, 41 states have (on average 137.73170731707316) internal successors, (5647), 41 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:33,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:33,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 502 [2023-08-24 14:49:33,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:38,454 INFO L124 PetriNetUnfolderBase]: 15064/20595 cut-off events. [2023-08-24 14:49:38,454 INFO L125 PetriNetUnfolderBase]: For 53370/53370 co-relation queries the response was YES. [2023-08-24 14:49:38,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77789 conditions, 20595 events. 15064/20595 cut-off events. For 53370/53370 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 109278 event pairs, 3619 based on Foata normal form. 12/18542 useless extension candidates. Maximal degree in co-relation 77754. Up to 7095 conditions per place. [2023-08-24 14:49:38,584 INFO L140 encePairwiseOnDemand]: 486/502 looper letters, 292 selfloop transitions, 175 changer transitions 41/508 dead transitions. [2023-08-24 14:49:38,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 508 transitions, 4351 flow [2023-08-24 14:49:38,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 14:49:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 14:49:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4265 transitions. [2023-08-24 14:49:38,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2929660667674131 [2023-08-24 14:49:38,596 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4265 transitions. [2023-08-24 14:49:38,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4265 transitions. [2023-08-24 14:49:38,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:38,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4265 transitions. [2023-08-24 14:49:38,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 147.06896551724137) internal successors, (4265), 29 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:38,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 502.0) internal successors, (15060), 30 states have internal predecessors, (15060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:38,638 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 502.0) internal successors, (15060), 30 states have internal predecessors, (15060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:38,638 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 377 flow. Second operand 29 states and 4265 transitions. [2023-08-24 14:49:38,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 508 transitions, 4351 flow [2023-08-24 14:49:38,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 508 transitions, 4273 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-24 14:49:38,763 INFO L231 Difference]: Finished difference. Result has 101 places, 251 transitions, 2558 flow [2023-08-24 14:49:38,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2558, PETRI_PLACES=101, PETRI_TRANSITIONS=251} [2023-08-24 14:49:38,764 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 65 predicate places. [2023-08-24 14:49:38,764 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 251 transitions, 2558 flow [2023-08-24 14:49:38,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 137.73170731707316) internal successors, (5647), 41 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:38,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:38,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:38,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 14:49:38,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:38,973 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:38,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1400348647, now seen corresponding path program 3 times [2023-08-24 14:49:38,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:38,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042472919] [2023-08-24 14:49:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:38,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:39,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:39,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:39,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042472919] [2023-08-24 14:49:39,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042472919] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:39,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745237693] [2023-08-24 14:49:39,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 14:49:39,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:39,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:39,688 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) [2023-08-24 14:49:39,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 14:49:39,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 14:49:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:49:39,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 14:49:39,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:49:40,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 14:49:40,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 14:49:40,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-24 14:49:40,425 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 14:49:40,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 11 [2023-08-24 14:49:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:40,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:40,838 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:40,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2023-08-24 14:49:40,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-08-24 14:49:40,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-24 14:49:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:49:41,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745237693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:49:41,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:49:41,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 39 [2023-08-24 14:49:41,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328783228] [2023-08-24 14:49:41,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:49:41,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 14:49:41,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 14:49:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1385, Unknown=8, NotChecked=0, Total=1560 [2023-08-24 14:49:41,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 502 [2023-08-24 14:49:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 251 transitions, 2558 flow. Second operand has 40 states, 40 states have (on average 134.775) internal successors, (5391), 40 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:41,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:41,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 502 [2023-08-24 14:49:41,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:49:50,580 INFO L124 PetriNetUnfolderBase]: 43439/59298 cut-off events. [2023-08-24 14:49:50,580 INFO L125 PetriNetUnfolderBase]: For 278924/278924 co-relation queries the response was YES. [2023-08-24 14:49:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281475 conditions, 59298 events. 43439/59298 cut-off events. For 278924/278924 co-relation queries the response was YES. Maximal size of possible extension queue 1981. Compared 361353 event pairs, 5628 based on Foata normal form. 118/59416 useless extension candidates. Maximal degree in co-relation 246659. Up to 9603 conditions per place. [2023-08-24 14:49:51,206 INFO L140 encePairwiseOnDemand]: 487/502 looper letters, 672 selfloop transitions, 441 changer transitions 43/1156 dead transitions. [2023-08-24 14:49:51,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 1156 transitions, 12151 flow [2023-08-24 14:49:51,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 14:49:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 14:49:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5618 transitions. [2023-08-24 14:49:51,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29450618578318305 [2023-08-24 14:49:51,225 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5618 transitions. [2023-08-24 14:49:51,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5618 transitions. [2023-08-24 14:49:51,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:49:51,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5618 transitions. [2023-08-24 14:49:51,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 147.8421052631579) internal successors, (5618), 38 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:51,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 502.0) internal successors, (19578), 39 states have internal predecessors, (19578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:51,267 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 502.0) internal successors, (19578), 39 states have internal predecessors, (19578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:51,268 INFO L175 Difference]: Start difference. First operand has 101 places, 251 transitions, 2558 flow. Second operand 38 states and 5618 transitions. [2023-08-24 14:49:51,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 1156 transitions, 12151 flow [2023-08-24 14:49:54,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 1156 transitions, 11826 flow, removed 53 selfloop flow, removed 3 redundant places. [2023-08-24 14:49:54,414 INFO L231 Difference]: Finished difference. Result has 154 places, 528 transitions, 6760 flow [2023-08-24 14:49:54,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=6760, PETRI_PLACES=154, PETRI_TRANSITIONS=528} [2023-08-24 14:49:54,415 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 118 predicate places. [2023-08-24 14:49:54,415 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 528 transitions, 6760 flow [2023-08-24 14:49:54,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 134.775) internal successors, (5391), 40 states have internal predecessors, (5391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:54,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:49:54,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:49:54,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 14:49:54,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:54,623 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:49:54,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:49:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1919496463, now seen corresponding path program 4 times [2023-08-24 14:49:54,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:49:54,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602265544] [2023-08-24 14:49:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:49:54,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:49:54,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:49:55,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 14:49:55,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:49:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602265544] [2023-08-24 14:49:55,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602265544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:49:55,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30532779] [2023-08-24 14:49:55,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 14:49:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:49:55,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:49:55,549 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) [2023-08-24 14:49:55,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 14:49:55,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 14:49:55,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:49:55,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 14:49:55,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:49:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:49:56,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:49:56,139 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:49:56,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-08-24 14:49:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 14:49:56,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30532779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:49:56,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:49:56,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 38 [2023-08-24 14:49:56,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510132688] [2023-08-24 14:49:56,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:49:56,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 14:49:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:49:56,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 14:49:56,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 14:49:56,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 502 [2023-08-24 14:49:56,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 528 transitions, 6760 flow. Second operand has 38 states, 38 states have (on average 128.8684210526316) internal successors, (4897), 38 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:49:56,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:49:56,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 502 [2023-08-24 14:49:56,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:50:11,606 INFO L124 PetriNetUnfolderBase]: 63669/87024 cut-off events. [2023-08-24 14:50:11,606 INFO L125 PetriNetUnfolderBase]: For 958033/958033 co-relation queries the response was YES. [2023-08-24 14:50:12,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510038 conditions, 87024 events. 63669/87024 cut-off events. For 958033/958033 co-relation queries the response was YES. Maximal size of possible extension queue 2800. Compared 554680 event pairs, 10537 based on Foata normal form. 8/87032 useless extension candidates. Maximal degree in co-relation 444898. Up to 23247 conditions per place. [2023-08-24 14:50:12,513 INFO L140 encePairwiseOnDemand]: 485/502 looper letters, 505 selfloop transitions, 1196 changer transitions 83/1784 dead transitions. [2023-08-24 14:50:12,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 1784 transitions, 25562 flow [2023-08-24 14:50:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 14:50:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 14:50:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4205 transitions. [2023-08-24 14:50:12,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27020948464207684 [2023-08-24 14:50:12,520 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4205 transitions. [2023-08-24 14:50:12,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4205 transitions. [2023-08-24 14:50:12,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:50:12,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4205 transitions. [2023-08-24 14:50:12,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 135.6451612903226) internal successors, (4205), 31 states have internal predecessors, (4205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:50:12,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 502.0) internal successors, (16064), 32 states have internal predecessors, (16064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:50:12,542 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 502.0) internal successors, (16064), 32 states have internal predecessors, (16064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:50:12,542 INFO L175 Difference]: Start difference. First operand has 154 places, 528 transitions, 6760 flow. Second operand 31 states and 4205 transitions. [2023-08-24 14:50:12,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 1784 transitions, 25562 flow [2023-08-24 14:50:30,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 1784 transitions, 25038 flow, removed 259 selfloop flow, removed 3 redundant places. [2023-08-24 14:50:30,589 INFO L231 Difference]: Finished difference. Result has 196 places, 1367 transitions, 21058 flow [2023-08-24 14:50:30,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=6558, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=21058, PETRI_PLACES=196, PETRI_TRANSITIONS=1367} [2023-08-24 14:50:30,590 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 160 predicate places. [2023-08-24 14:50:30,591 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 1367 transitions, 21058 flow [2023-08-24 14:50:30,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 128.8684210526316) internal successors, (4897), 38 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:50:30,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:50:30,592 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:50:30,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 14:50:30,797 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,SelfDestructingSolverStorable11 [2023-08-24 14:50:30,797 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:50:30,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:50:30,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1009538781, now seen corresponding path program 5 times [2023-08-24 14:50:30,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:50:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186158243] [2023-08-24 14:50:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:50:30,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:50:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:50:31,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:50:31,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:50:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186158243] [2023-08-24 14:50:31,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186158243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:50:31,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780537139] [2023-08-24 14:50:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 14:50:31,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:50:31,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:50:31,195 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) [2023-08-24 14:50:31,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 14:50:31,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 14:50:31,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:50:31,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 14:50:31,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:50:31,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:50:31,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:50:31,690 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:50:31,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2023-08-24 14:50:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:50:31,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780537139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:50:31,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:50:31,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2023-08-24 14:50:31,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307520285] [2023-08-24 14:50:31,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:50:31,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 14:50:31,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:50:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 14:50:31,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2023-08-24 14:50:31,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 502 [2023-08-24 14:50:31,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 1367 transitions, 21058 flow. Second operand has 28 states, 28 states have (on average 150.0) internal successors, (4200), 28 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:50:31,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:50:31,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 502 [2023-08-24 14:50:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:51:01,145 INFO L124 PetriNetUnfolderBase]: 88318/119981 cut-off events. [2023-08-24 14:51:01,145 INFO L125 PetriNetUnfolderBase]: For 1914959/1916763 co-relation queries the response was YES. [2023-08-24 14:51:02,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 819514 conditions, 119981 events. 88318/119981 cut-off events. For 1914959/1916763 co-relation queries the response was YES. Maximal size of possible extension queue 4132. Compared 785051 event pairs, 22261 based on Foata normal form. 1546/121187 useless extension candidates. Maximal degree in co-relation 789831. Up to 30845 conditions per place. [2023-08-24 14:51:02,854 INFO L140 encePairwiseOnDemand]: 486/502 looper letters, 1076 selfloop transitions, 2293 changer transitions 0/3395 dead transitions. [2023-08-24 14:51:02,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 3395 transitions, 55151 flow [2023-08-24 14:51:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 14:51:02,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 14:51:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5576 transitions. [2023-08-24 14:51:02,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31735913488901535 [2023-08-24 14:51:02,862 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5576 transitions. [2023-08-24 14:51:02,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5576 transitions. [2023-08-24 14:51:02,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:51:02,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5576 transitions. [2023-08-24 14:51:02,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 159.31428571428572) internal successors, (5576), 35 states have internal predecessors, (5576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:51:02,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 502.0) internal successors, (18072), 36 states have internal predecessors, (18072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:51:02,892 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 502.0) internal successors, (18072), 36 states have internal predecessors, (18072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:51:02,892 INFO L175 Difference]: Start difference. First operand has 196 places, 1367 transitions, 21058 flow. Second operand 35 states and 5576 transitions. [2023-08-24 14:51:02,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 3395 transitions, 55151 flow [2023-08-24 14:52:18,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 3395 transitions, 53367 flow, removed 889 selfloop flow, removed 3 redundant places. [2023-08-24 14:52:18,594 INFO L231 Difference]: Finished difference. Result has 250 places, 2748 transitions, 47841 flow [2023-08-24 14:52:18,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=20442, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=47841, PETRI_PLACES=250, PETRI_TRANSITIONS=2748} [2023-08-24 14:52:18,596 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 214 predicate places. [2023-08-24 14:52:18,596 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 2748 transitions, 47841 flow [2023-08-24 14:52:18,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 150.0) internal successors, (4200), 28 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:18,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:52:18,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:52:18,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 14:52:18,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:52:18,802 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:52:18,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:52:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1197425039, now seen corresponding path program 6 times [2023-08-24 14:52:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:52:18,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578411887] [2023-08-24 14:52:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:52:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:52:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:52:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:19,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:52:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578411887] [2023-08-24 14:52:19,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578411887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:52:19,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404105477] [2023-08-24 14:52:19,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 14:52:19,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:52:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:52:19,457 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) [2023-08-24 14:52:19,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 14:52:19,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 14:52:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 14:52:19,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 14:52:19,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:52:19,934 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 14:52:19,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 11 [2023-08-24 14:52:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:19,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:52:20,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:52:20,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-24 14:52:20,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:52:20,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404105477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:52:20,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:52:20,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 31 [2023-08-24 14:52:20,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680059836] [2023-08-24 14:52:20,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:52:20,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 14:52:20,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:52:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 14:52:20,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-08-24 14:52:20,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 502 [2023-08-24 14:52:20,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 2748 transitions, 47841 flow. Second operand has 32 states, 32 states have (on average 138.46875) internal successors, (4431), 32 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:52:20,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:52:20,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 502 [2023-08-24 14:52:20,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 14:53:14,741 INFO L124 PetriNetUnfolderBase]: 108546/146459 cut-off events. [2023-08-24 14:53:14,741 INFO L125 PetriNetUnfolderBase]: For 2833670/2833670 co-relation queries the response was YES. [2023-08-24 14:53:16,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1118980 conditions, 146459 events. 108546/146459 cut-off events. For 2833670/2833670 co-relation queries the response was YES. Maximal size of possible extension queue 4788. Compared 953215 event pairs, 22576 based on Foata normal form. 184/146643 useless extension candidates. Maximal degree in co-relation 1103168. Up to 29420 conditions per place. [2023-08-24 14:53:17,462 INFO L140 encePairwiseOnDemand]: 487/502 looper letters, 1561 selfloop transitions, 2834 changer transitions 6/4401 dead transitions. [2023-08-24 14:53:17,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 4401 transitions, 82966 flow [2023-08-24 14:53:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 14:53:17,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 14:53:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6224 transitions. [2023-08-24 14:53:17,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29520015177385694 [2023-08-24 14:53:17,471 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6224 transitions. [2023-08-24 14:53:17,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6224 transitions. [2023-08-24 14:53:17,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 14:53:17,473 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6224 transitions. [2023-08-24 14:53:17,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 148.1904761904762) internal successors, (6224), 42 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:17,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:17,498 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 502.0) internal successors, (21586), 43 states have internal predecessors, (21586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:53:17,498 INFO L175 Difference]: Start difference. First operand has 250 places, 2748 transitions, 47841 flow. Second operand 42 states and 6224 transitions. [2023-08-24 14:53:17,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 4401 transitions, 82966 flow [2023-08-24 14:57:40,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 4401 transitions, 79265 flow, removed 1293 selfloop flow, removed 3 redundant places. [2023-08-24 14:57:40,205 INFO L231 Difference]: Finished difference. Result has 316 places, 3561 transitions, 70941 flow [2023-08-24 14:57:40,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=502, PETRI_DIFFERENCE_MINUEND_FLOW=46160, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2031, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=70941, PETRI_PLACES=316, PETRI_TRANSITIONS=3561} [2023-08-24 14:57:40,208 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 280 predicate places. [2023-08-24 14:57:40,208 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 3561 transitions, 70941 flow [2023-08-24 14:57:40,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 138.46875) internal successors, (4431), 32 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:57:40,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 14:57:40,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 14:57:40,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 14:57:40,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:57:40,414 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 14:57:40,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 14:57:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1970173007, now seen corresponding path program 7 times [2023-08-24 14:57:40,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 14:57:40,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749928039] [2023-08-24 14:57:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 14:57:40,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 14:57:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:57:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:57:40,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 14:57:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749928039] [2023-08-24 14:57:40,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749928039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 14:57:40,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549625598] [2023-08-24 14:57:40,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 14:57:40,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 14:57:40,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 14:57:40,868 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) [2023-08-24 14:57:40,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 14:57:41,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 14:57:41,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 14:57:41,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 14:57:41,304 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 14:57:41,304 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 17 treesize of output 11 [2023-08-24 14:57:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:57:41,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 14:57:41,466 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 14:57:41,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2023-08-24 14:57:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 14:57:41,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549625598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 14:57:41,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 14:57:41,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 33 [2023-08-24 14:57:41,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697101161] [2023-08-24 14:57:41,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 14:57:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 14:57:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 14:57:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 14:57:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 14:57:41,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 502 [2023-08-24 14:57:41,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 3561 transitions, 70941 flow. Second operand has 34 states, 34 states have (on average 142.14705882352942) internal successors, (4833), 34 states have internal predecessors, (4833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 14:57:41,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 14:57:41,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 502 [2023-08-24 14:57:41,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand