/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 08:33:41,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:33:41,288 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 08:33:41,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:33:41,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:33:41,322 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:33:41,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:33:41,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:33:41,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:33:41,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:33:41,327 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:33:41,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:33:41,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:33:41,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:33:41,329 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:33:41,329 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:33:41,329 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:33:41,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:33:41,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:33:41,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:33:41,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:33:41,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:33:41,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:33:41,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:33:41,332 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:33:41,332 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:33:41,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:33:41,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:33:41,333 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:33:41,333 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:33:41,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:33:41,334 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:33:41,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:33:41,334 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:33:41,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:33:41,335 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:33:41,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:33:41,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:33:41,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:33:41,671 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:33:41,671 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:33:41,672 INFO L431 ainManager$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 08:33:42,784 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:33:42,998 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:33:42,999 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-dot-product.wvr.c [2023-08-24 08:33:43,006 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cfb13a2/61e19010c7ea437bae16598408db7569/FLAG721f32c62 [2023-08-24 08:33:43,017 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cfb13a2/61e19010c7ea437bae16598408db7569 [2023-08-24 08:33:43,019 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:33:43,020 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:33:43,021 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:33:43,022 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:33:43,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:33:43,025 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,026 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf8354 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43, skipping insertion in model container [2023-08-24 08:33:43,026 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,046 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:33:43,233 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 08:33:43,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:33:43,253 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:33:43,291 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 08:33:43,294 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:33:43,306 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:33:43,306 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 08:33:43,312 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:33:43,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43 WrapperNode [2023-08-24 08:33:43,313 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:33:43,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:33:43,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:33:43,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:33:43,320 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,381 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 22, statements flattened = 288 [2023-08-24 08:33:43,381 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:33:43,382 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:33:43,382 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:33:43,382 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:33:43,392 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,402 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,410 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,414 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,416 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,417 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:33:43,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:33:43,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:33:43,432 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:33:43,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (1/1) ... [2023-08-24 08:33:43,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:33:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:43,461 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 08:33:43,485 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 08:33:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:33:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:33:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:33:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:33:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:33:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:33:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:33:43,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:33:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 08:33:43,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 08:33:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:33:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 08:33:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 08:33:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 08:33:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:33:43,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:33:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:33:43,511 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 08:33:43,610 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:33:43,612 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:33:44,001 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:33:44,137 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:33:44,137 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-24 08:33:44,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:33:44 BoogieIcfgContainer [2023-08-24 08:33:44,140 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:33:44,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:33:44,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:33:44,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:33:44,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:33:43" (1/3) ... [2023-08-24 08:33:44,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1749219c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:33:44, skipping insertion in model container [2023-08-24 08:33:44,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:33:43" (2/3) ... [2023-08-24 08:33:44,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1749219c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:33:44, skipping insertion in model container [2023-08-24 08:33:44,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:33:44" (3/3) ... [2023-08-24 08:33:44,149 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-dot-product.wvr.c [2023-08-24 08:33:44,163 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:33:44,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:33:44,165 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:33:44,253 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 08:33:44,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 247 transitions, 518 flow [2023-08-24 08:33:44,374 INFO L124 PetriNetUnfolderBase]: 25/244 cut-off events. [2023-08-24 08:33:44,374 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:33:44,381 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 08:33:44,381 INFO L82 GeneralOperation]: Start removeDead. Operand has 232 places, 247 transitions, 518 flow [2023-08-24 08:33:44,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 234 transitions, 486 flow [2023-08-24 08:33:44,389 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:33:44,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 219 places, 234 transitions, 486 flow [2023-08-24 08:33:44,403 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 219 places, 234 transitions, 486 flow [2023-08-24 08:33:44,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 234 transitions, 486 flow [2023-08-24 08:33:44,475 INFO L124 PetriNetUnfolderBase]: 25/234 cut-off events. [2023-08-24 08:33:44,475 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:33:44,478 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 08:33:44,483 INFO L119 LiptonReduction]: Number of co-enabled transitions 7560 [2023-08-24 08:33:51,385 INFO L134 LiptonReduction]: Checked pairs total: 8849 [2023-08-24 08:33:51,385 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-24 08:33:51,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:33:51,402 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;@79807eaa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:33:51,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 08:33:51,408 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:33:51,408 INFO L124 PetriNetUnfolderBase]: 8/33 cut-off events. [2023-08-24 08:33:51,408 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:33:51,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:51,409 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 08:33:51,409 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 08:33:51,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:51,413 INFO L85 PathProgramCache]: Analyzing trace with hash 886933208, now seen corresponding path program 1 times [2023-08-24 08:33:51,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:51,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971434566] [2023-08-24 08:33:51,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:51,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:51,924 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 08:33:51,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:51,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971434566] [2023-08-24 08:33:51,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971434566] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:51,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:51,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:33:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999902112] [2023-08-24 08:33:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:51,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 08:33:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:51,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 08:33:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 08:33:51,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 502 [2023-08-24 08:33:51,961 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 08:33:51,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:51,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 502 [2023-08-24 08:33:51,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:52,207 INFO L124 PetriNetUnfolderBase]: 1162/1537 cut-off events. [2023-08-24 08:33:52,208 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-08-24 08:33:52,212 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 08:33:52,221 INFO L140 encePairwiseOnDemand]: 497/502 looper letters, 44 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-24 08:33:52,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 220 flow [2023-08-24 08:33:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:33:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:33:52,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2023-08-24 08:33:52,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.426792828685259 [2023-08-24 08:33:52,243 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2023-08-24 08:33:52,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2023-08-24 08:33:52,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:52,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2023-08-24 08:33:52,257 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 08:33:52,265 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 08:33:52,266 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 08:33:52,268 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 86 flow. Second operand 4 states and 857 transitions. [2023-08-24 08:33:52,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 220 flow [2023-08-24 08:33:52,274 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 08:33:52,276 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 95 flow [2023-08-24 08:33:52,278 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 08:33:52,281 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2023-08-24 08:33:52,281 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 95 flow [2023-08-24 08:33:52,282 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 08:33:52,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:52,283 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 08:33:52,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:33:52,283 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 08:33:52,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:52,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1079212789, now seen corresponding path program 1 times [2023-08-24 08:33:52,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:52,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149595793] [2023-08-24 08:33:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:52,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:52,615 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 08:33:52,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:52,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149595793] [2023-08-24 08:33:52,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149595793] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:52,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:52,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:33:52,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288181712] [2023-08-24 08:33:52,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:52,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:33:52,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:52,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:33:52,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:33:52,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 502 [2023-08-24 08:33:52,621 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 08:33:52,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:52,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 502 [2023-08-24 08:33:52,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:52,825 INFO L124 PetriNetUnfolderBase]: 1163/1540 cut-off events. [2023-08-24 08:33:52,826 INFO L125 PetriNetUnfolderBase]: For 296/296 co-relation queries the response was YES. [2023-08-24 08:33:52,828 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 08:33:52,835 INFO L140 encePairwiseOnDemand]: 498/502 looper letters, 32 selfloop transitions, 2 changer transitions 2/38 dead transitions. [2023-08-24 08:33:52,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 173 flow [2023-08-24 08:33:52,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 08:33:52,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 08:33:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 748 transitions. [2023-08-24 08:33:52,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37250996015936255 [2023-08-24 08:33:52,838 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 748 transitions. [2023-08-24 08:33:52,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 748 transitions. [2023-08-24 08:33:52,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:52,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 748 transitions. [2023-08-24 08:33:52,840 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 08:33:52,843 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 08:33:52,844 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 08:33:52,845 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 95 flow. Second operand 4 states and 748 transitions. [2023-08-24 08:33:52,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 173 flow [2023-08-24 08:33:52,847 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 08:33:52,848 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 105 flow [2023-08-24 08:33:52,848 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 08:33:52,849 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-24 08:33:52,849 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 105 flow [2023-08-24 08:33:52,850 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 08:33:52,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:52,850 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 08:33:52,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:33:52,851 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 08:33:52,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash 287113945, now seen corresponding path program 1 times [2023-08-24 08:33:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671949582] [2023-08-24 08:33:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:52,959 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 08:33:52,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671949582] [2023-08-24 08:33:52,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671949582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:52,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711076570] [2023-08-24 08:33:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:52,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:52,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:52,969 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 08:33:53,008 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 08:33:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:53,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:33:53,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:53,171 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 08:33:53,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:53,212 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 08:33:53,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711076570] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:53,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:33:53,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-08-24 08:33:53,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368710369] [2023-08-24 08:33:53,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:53,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:33:53,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:33:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-24 08:33:53,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 502 [2023-08-24 08:33:53,220 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 08:33:53,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:53,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 502 [2023-08-24 08:33:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:53,421 INFO L124 PetriNetUnfolderBase]: 1076/1448 cut-off events. [2023-08-24 08:33:53,422 INFO L125 PetriNetUnfolderBase]: For 164/276 co-relation queries the response was YES. [2023-08-24 08:33:53,424 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 08:33:53,430 INFO L140 encePairwiseOnDemand]: 496/502 looper letters, 45 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-08-24 08:33:53,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 249 flow [2023-08-24 08:33:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:33:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:33:53,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 959 transitions. [2023-08-24 08:33:53,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38207171314741034 [2023-08-24 08:33:53,433 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 959 transitions. [2023-08-24 08:33:53,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 959 transitions. [2023-08-24 08:33:53,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:53,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 959 transitions. [2023-08-24 08:33:53,437 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 08:33:53,441 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 08:33:53,442 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 08:33:53,443 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 105 flow. Second operand 5 states and 959 transitions. [2023-08-24 08:33:53,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 249 flow [2023-08-24 08:33:53,446 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 08:33:53,447 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 122 flow [2023-08-24 08:33:53,447 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 08:33:53,448 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-24 08:33:53,448 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 122 flow [2023-08-24 08:33:53,449 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 08:33:53,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:53,449 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 08:33:53,460 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 08:33:53,657 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 08:33:53,657 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 08:33:53,658 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:53,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1052394200, now seen corresponding path program 1 times [2023-08-24 08:33:53,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:53,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430968653] [2023-08-24 08:33:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:53,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:53,848 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 08:33:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430968653] [2023-08-24 08:33:53,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430968653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:53,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:53,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:33:53,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610803932] [2023-08-24 08:33:53,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:53,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:33:53,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:33:53,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:33:53,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 502 [2023-08-24 08:33:53,852 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 08:33:53,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:53,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 502 [2023-08-24 08:33:53,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:54,090 INFO L124 PetriNetUnfolderBase]: 1837/2470 cut-off events. [2023-08-24 08:33:54,090 INFO L125 PetriNetUnfolderBase]: For 949/1319 co-relation queries the response was YES. [2023-08-24 08:33:54,094 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 08:33:54,106 INFO L140 encePairwiseOnDemand]: 497/502 looper letters, 55 selfloop transitions, 4 changer transitions 1/63 dead transitions. [2023-08-24 08:33:54,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 63 transitions, 321 flow [2023-08-24 08:33:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:33:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:33:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 707 transitions. [2023-08-24 08:33:54,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46945551128818064 [2023-08-24 08:33:54,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 707 transitions. [2023-08-24 08:33:54,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 707 transitions. [2023-08-24 08:33:54,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:54,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 707 transitions. [2023-08-24 08:33:54,111 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 08:33:54,113 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 08:33:54,114 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 08:33:54,114 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 122 flow. Second operand 3 states and 707 transitions. [2023-08-24 08:33:54,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 63 transitions, 321 flow [2023-08-24 08:33:54,118 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 08:33:54,119 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 142 flow [2023-08-24 08:33:54,119 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 08:33:54,120 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-24 08:33:54,120 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 142 flow [2023-08-24 08:33:54,121 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 08:33:54,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:54,121 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 08:33:54,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 08:33:54,121 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 08:33:54,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1767380419, now seen corresponding path program 1 times [2023-08-24 08:33:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:54,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71745017] [2023-08-24 08:33:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:54,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:54,279 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 08:33:54,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:54,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71745017] [2023-08-24 08:33:54,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71745017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:54,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:54,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 08:33:54,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265127476] [2023-08-24 08:33:54,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:54,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 08:33:54,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:54,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 08:33:54,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 08:33:54,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 502 [2023-08-24 08:33:54,283 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 08:33:54,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:54,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 502 [2023-08-24 08:33:54,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:54,906 INFO L124 PetriNetUnfolderBase]: 4237/5709 cut-off events. [2023-08-24 08:33:54,906 INFO L125 PetriNetUnfolderBase]: For 2809/3253 co-relation queries the response was YES. [2023-08-24 08:33:54,913 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 08:33:54,937 INFO L140 encePairwiseOnDemand]: 496/502 looper letters, 82 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-08-24 08:33:54,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 90 transitions, 483 flow [2023-08-24 08:33:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:33:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:33:54,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 886 transitions. [2023-08-24 08:33:54,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3529880478087649 [2023-08-24 08:33:54,940 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 886 transitions. [2023-08-24 08:33:54,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 886 transitions. [2023-08-24 08:33:54,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:54,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 886 transitions. [2023-08-24 08:33:54,943 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 08:33:54,948 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 08:33:54,948 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 08:33:54,949 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 142 flow. Second operand 5 states and 886 transitions. [2023-08-24 08:33:54,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 90 transitions, 483 flow [2023-08-24 08:33:54,959 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 08:33:54,961 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 194 flow [2023-08-24 08:33:54,961 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 08:33:54,963 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2023-08-24 08:33:54,963 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 194 flow [2023-08-24 08:33:54,964 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 08:33:54,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:54,964 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 08:33:54,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 08:33:54,964 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 08:33:54,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 895338130, now seen corresponding path program 1 times [2023-08-24 08:33:54,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896535945] [2023-08-24 08:33:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:54,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:55,200 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 08:33:55,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896535945] [2023-08-24 08:33:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896535945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:33:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556159401] [2023-08-24 08:33:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:55,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:33:55,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:33:55,209 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 08:33:55,212 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 08:33:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:55,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 08:33:55,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:33:55,401 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 08:33:55,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:33:55,435 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 08:33:55,495 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 08:33:55,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556159401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:33:55,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:33:55,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-24 08:33:55,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504105875] [2023-08-24 08:33:55,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:33:55,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 08:33:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 08:33:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-24 08:33:55,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 502 [2023-08-24 08:33:55,501 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 08:33:55,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:55,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 502 [2023-08-24 08:33:55,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:56,399 INFO L124 PetriNetUnfolderBase]: 6282/8486 cut-off events. [2023-08-24 08:33:56,399 INFO L125 PetriNetUnfolderBase]: For 5423/6083 co-relation queries the response was YES. [2023-08-24 08:33:56,412 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 08:33:56,443 INFO L140 encePairwiseOnDemand]: 496/502 looper letters, 82 selfloop transitions, 11 changer transitions 0/95 dead transitions. [2023-08-24 08:33:56,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 95 transitions, 551 flow [2023-08-24 08:33:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:33:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:33:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1050 transitions. [2023-08-24 08:33:56,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34860557768924305 [2023-08-24 08:33:56,446 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1050 transitions. [2023-08-24 08:33:56,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1050 transitions. [2023-08-24 08:33:56,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:56,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1050 transitions. [2023-08-24 08:33:56,449 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 08:33:56,453 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 08:33:56,453 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 08:33:56,453 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 194 flow. Second operand 6 states and 1050 transitions. [2023-08-24 08:33:56,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 95 transitions, 551 flow [2023-08-24 08:33:56,471 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 08:33:56,472 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 273 flow [2023-08-24 08:33:56,473 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 08:33:56,473 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2023-08-24 08:33:56,473 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 273 flow [2023-08-24 08:33:56,474 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 08:33:56,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:56,475 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 08:33:56,481 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 08:33:56,680 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 08:33:56,681 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 08:33:56,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash 707650262, now seen corresponding path program 1 times [2023-08-24 08:33:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:56,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129401040] [2023-08-24 08:33:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:57,075 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 08:33:57,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:57,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129401040] [2023-08-24 08:33:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129401040] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:57,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:57,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 08:33:57,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25041436] [2023-08-24 08:33:57,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:57,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:33:57,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:33:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:33:57,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 502 [2023-08-24 08:33:57,086 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 08:33:57,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:57,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 502 [2023-08-24 08:33:57,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:57,917 INFO L124 PetriNetUnfolderBase]: 6192/8451 cut-off events. [2023-08-24 08:33:57,918 INFO L125 PetriNetUnfolderBase]: For 13228/13922 co-relation queries the response was YES. [2023-08-24 08:33:57,932 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 08:33:57,963 INFO L140 encePairwiseOnDemand]: 494/502 looper letters, 83 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2023-08-24 08:33:57,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 615 flow [2023-08-24 08:33:57,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:33:57,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:33:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 999 transitions. [2023-08-24 08:33:57,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33167330677290835 [2023-08-24 08:33:57,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 999 transitions. [2023-08-24 08:33:57,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 999 transitions. [2023-08-24 08:33:57,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:57,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 999 transitions. [2023-08-24 08:33:57,970 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 08:33:57,974 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 08:33:57,975 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 08:33:57,975 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 273 flow. Second operand 6 states and 999 transitions. [2023-08-24 08:33:57,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 615 flow [2023-08-24 08:33:57,991 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 08:33:57,993 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 303 flow [2023-08-24 08:33:57,993 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 08:33:57,995 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2023-08-24 08:33:57,995 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 303 flow [2023-08-24 08:33:57,995 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 08:33:57,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:57,998 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 08:33:57,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 08:33:57,998 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 08:33:57,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:57,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1629824642, now seen corresponding path program 2 times [2023-08-24 08:33:57,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:57,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673876232] [2023-08-24 08:33:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:57,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:58,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:58,338 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 08:33:58,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:58,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673876232] [2023-08-24 08:33:58,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673876232] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:58,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:58,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 08:33:58,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491480690] [2023-08-24 08:33:58,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:58,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 08:33:58,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 08:33:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 08:33:58,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 502 [2023-08-24 08:33:58,343 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 08:33:58,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:58,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 502 [2023-08-24 08:33:58,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:33:59,262 INFO L124 PetriNetUnfolderBase]: 6436/8794 cut-off events. [2023-08-24 08:33:59,262 INFO L125 PetriNetUnfolderBase]: For 15840/16554 co-relation queries the response was YES. [2023-08-24 08:33:59,280 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 08:33:59,326 INFO L140 encePairwiseOnDemand]: 494/502 looper letters, 85 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2023-08-24 08:33:59,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 96 transitions, 663 flow [2023-08-24 08:33:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:33:59,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:33:59,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 999 transitions. [2023-08-24 08:33:59,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33167330677290835 [2023-08-24 08:33:59,330 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 999 transitions. [2023-08-24 08:33:59,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 999 transitions. [2023-08-24 08:33:59,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:33:59,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 999 transitions. [2023-08-24 08:33:59,332 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 08:33:59,336 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 08:33:59,336 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 08:33:59,336 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 303 flow. Second operand 6 states and 999 transitions. [2023-08-24 08:33:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 96 transitions, 663 flow [2023-08-24 08:33:59,370 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 08:33:59,372 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 345 flow [2023-08-24 08:33:59,372 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 08:33:59,372 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-08-24 08:33:59,373 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 345 flow [2023-08-24 08:33:59,373 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 08:33:59,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:33:59,373 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 08:33:59,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 08:33:59,374 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 08:33:59,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:33:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash -206341686, now seen corresponding path program 3 times [2023-08-24 08:33:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:33:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948821499] [2023-08-24 08:33:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:33:59,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:33:59,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:33:59,690 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 08:33:59,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:33:59,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948821499] [2023-08-24 08:33:59,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948821499] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:33:59,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:33:59,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 08:33:59,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13773341] [2023-08-24 08:33:59,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:33:59,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 08:33:59,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:33:59,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 08:33:59,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-24 08:33:59,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 502 [2023-08-24 08:33:59,695 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 08:33:59,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:33:59,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 502 [2023-08-24 08:33:59,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:00,498 INFO L124 PetriNetUnfolderBase]: 5942/8166 cut-off events. [2023-08-24 08:34:00,498 INFO L125 PetriNetUnfolderBase]: For 18169/18829 co-relation queries the response was YES. [2023-08-24 08:34:00,519 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 08:34:00,546 INFO L140 encePairwiseOnDemand]: 495/502 looper letters, 80 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2023-08-24 08:34:00,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 92 transitions, 665 flow [2023-08-24 08:34:00,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:34:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:34:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 978 transitions. [2023-08-24 08:34:00,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3247011952191235 [2023-08-24 08:34:00,550 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 978 transitions. [2023-08-24 08:34:00,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 978 transitions. [2023-08-24 08:34:00,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:00,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 978 transitions. [2023-08-24 08:34:00,552 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 08:34:00,556 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 08:34:00,558 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 08:34:00,558 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 345 flow. Second operand 6 states and 978 transitions. [2023-08-24 08:34:00,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 92 transitions, 665 flow [2023-08-24 08:34:00,589 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 08:34:00,590 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 377 flow [2023-08-24 08:34:00,591 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 08:34:00,592 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2023-08-24 08:34:00,592 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 377 flow [2023-08-24 08:34:00,592 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 08:34:00,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:00,593 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 08:34:00,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 08:34:00,593 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 08:34:00,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -317186615, now seen corresponding path program 2 times [2023-08-24 08:34:00,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:00,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049892940] [2023-08-24 08:34:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:00,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:01,395 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 08:34:01,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049892940] [2023-08-24 08:34:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049892940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215070008] [2023-08-24 08:34:01,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:34:01,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:01,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:01,397 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 08:34:01,420 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 08:34:01,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:34:01,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:01,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 08:34:01,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:01,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:01,803 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 08:34:01,916 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:34:01,916 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 08:34:01,973 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 08:34:01,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:02,182 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:02,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2023-08-24 08:34:02,189 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 08:34:02,577 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 08:34:02,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215070008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:02,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:02,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2023-08-24 08:34:02,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42615439] [2023-08-24 08:34:02,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:02,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-24 08:34:02,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:02,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-24 08:34:02,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2023-08-24 08:34:02,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 502 [2023-08-24 08:34:02,589 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 08:34:02,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:02,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 502 [2023-08-24 08:34:02,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:07,079 INFO L124 PetriNetUnfolderBase]: 15064/20595 cut-off events. [2023-08-24 08:34:07,079 INFO L125 PetriNetUnfolderBase]: For 53370/53370 co-relation queries the response was YES. [2023-08-24 08:34:07,148 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 08:34:07,240 INFO L140 encePairwiseOnDemand]: 486/502 looper letters, 292 selfloop transitions, 175 changer transitions 41/508 dead transitions. [2023-08-24 08:34:07,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 508 transitions, 4351 flow [2023-08-24 08:34:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 08:34:07,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 08:34:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4265 transitions. [2023-08-24 08:34:07,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2929660667674131 [2023-08-24 08:34:07,254 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4265 transitions. [2023-08-24 08:34:07,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4265 transitions. [2023-08-24 08:34:07,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:07,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4265 transitions. [2023-08-24 08:34:07,265 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 08:34:07,285 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 08:34:07,288 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 08:34:07,289 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 377 flow. Second operand 29 states and 4265 transitions. [2023-08-24 08:34:07,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 508 transitions, 4351 flow [2023-08-24 08:34:07,434 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 08:34:07,440 INFO L231 Difference]: Finished difference. Result has 101 places, 251 transitions, 2558 flow [2023-08-24 08:34:07,440 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 08:34:07,441 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 65 predicate places. [2023-08-24 08:34:07,441 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 251 transitions, 2558 flow [2023-08-24 08:34:07,443 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 08:34:07,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:07,443 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 08:34:07,454 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 08:34:07,650 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 08:34:07,651 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 08:34:07,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:07,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1400348647, now seen corresponding path program 3 times [2023-08-24 08:34:07,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:07,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237744026] [2023-08-24 08:34:07,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:07,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:08,470 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 08:34:08,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:08,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237744026] [2023-08-24 08:34:08,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237744026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:08,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67853514] [2023-08-24 08:34:08,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:34:08,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:08,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:08,472 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 08:34:08,491 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 08:34:08,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:34:08,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:08,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 08:34:08,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:08,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:08,849 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 08:34:08,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:34:08,891 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 08:34:09,058 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:34:09,059 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 08:34:09,111 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 08:34:09,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:09,478 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:09,478 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 08:34:09,483 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 08:34:09,488 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 08:34:09,803 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 08:34:09,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67853514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:09,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:09,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 39 [2023-08-24 08:34:09,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016359452] [2023-08-24 08:34:09,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:09,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 08:34:09,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:09,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 08:34:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1385, Unknown=8, NotChecked=0, Total=1560 [2023-08-24 08:34:09,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 502 [2023-08-24 08:34:09,813 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 08:34:09,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:09,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 502 [2023-08-24 08:34:09,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:18,861 INFO L124 PetriNetUnfolderBase]: 43439/59298 cut-off events. [2023-08-24 08:34:18,862 INFO L125 PetriNetUnfolderBase]: For 278924/278924 co-relation queries the response was YES. [2023-08-24 08:34:19,143 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 08:34:19,361 INFO L140 encePairwiseOnDemand]: 487/502 looper letters, 672 selfloop transitions, 441 changer transitions 43/1156 dead transitions. [2023-08-24 08:34:19,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 1156 transitions, 12151 flow [2023-08-24 08:34:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 08:34:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 08:34:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 5618 transitions. [2023-08-24 08:34:19,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29450618578318305 [2023-08-24 08:34:19,377 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 5618 transitions. [2023-08-24 08:34:19,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 5618 transitions. [2023-08-24 08:34:19,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:19,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 5618 transitions. [2023-08-24 08:34:19,389 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 08:34:19,410 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 08:34:19,413 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 08:34:19,413 INFO L175 Difference]: Start difference. First operand has 101 places, 251 transitions, 2558 flow. Second operand 38 states and 5618 transitions. [2023-08-24 08:34:19,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 1156 transitions, 12151 flow [2023-08-24 08:34:22,668 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 08:34:22,681 INFO L231 Difference]: Finished difference. Result has 154 places, 528 transitions, 6760 flow [2023-08-24 08:34:22,681 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 08:34:22,682 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 118 predicate places. [2023-08-24 08:34:22,682 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 528 transitions, 6760 flow [2023-08-24 08:34:22,683 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 08:34:22,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:34:22,683 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 08:34:22,691 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 08:34:22,890 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 08:34:22,890 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 08:34:22,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:34:22,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1919496463, now seen corresponding path program 4 times [2023-08-24 08:34:22,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:34:22,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557278485] [2023-08-24 08:34:22,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:34:22,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:34:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:34:23,841 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 08:34:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:34:23,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557278485] [2023-08-24 08:34:23,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557278485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:34:23,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069036966] [2023-08-24 08:34:23,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:34:23,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:34:23,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:34:23,845 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 08:34:23,879 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 08:34:23,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:34:23,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:34:23,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 08:34:24,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:34:24,324 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 08:34:24,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:34:24,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:34:24,448 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 08:34:24,554 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 08:34:24,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069036966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:34:24,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:34:24,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 38 [2023-08-24 08:34:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238719874] [2023-08-24 08:34:24,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:34:24,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 08:34:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:34:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 08:34:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 08:34:24,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 502 [2023-08-24 08:34:24,564 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 08:34:24,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:34:24,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 502 [2023-08-24 08:34:24,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:34:39,844 INFO L124 PetriNetUnfolderBase]: 63669/87024 cut-off events. [2023-08-24 08:34:39,845 INFO L125 PetriNetUnfolderBase]: For 958033/958033 co-relation queries the response was YES. [2023-08-24 08:34:40,541 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 08:34:41,028 INFO L140 encePairwiseOnDemand]: 485/502 looper letters, 505 selfloop transitions, 1196 changer transitions 83/1784 dead transitions. [2023-08-24 08:34:41,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 1784 transitions, 25562 flow [2023-08-24 08:34:41,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:34:41,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:34:41,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4205 transitions. [2023-08-24 08:34:41,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27020948464207684 [2023-08-24 08:34:41,035 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4205 transitions. [2023-08-24 08:34:41,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4205 transitions. [2023-08-24 08:34:41,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:34:41,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4205 transitions. [2023-08-24 08:34:41,041 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 08:34:41,054 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 08:34:41,055 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 08:34:41,055 INFO L175 Difference]: Start difference. First operand has 154 places, 528 transitions, 6760 flow. Second operand 31 states and 4205 transitions. [2023-08-24 08:34:41,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 1784 transitions, 25562 flow [2023-08-24 08:35:00,144 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 08:35:00,166 INFO L231 Difference]: Finished difference. Result has 196 places, 1367 transitions, 21058 flow [2023-08-24 08:35:00,166 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 08:35:00,167 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 160 predicate places. [2023-08-24 08:35:00,167 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 1367 transitions, 21058 flow [2023-08-24 08:35:00,168 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 08:35:00,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:35:00,168 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 08:35:00,177 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 08:35:00,374 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 08:35:00,375 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 08:35:00,375 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:35:00,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1009538781, now seen corresponding path program 5 times [2023-08-24 08:35:00,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:35:00,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365082314] [2023-08-24 08:35:00,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:35:00,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:35:00,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:35:00,791 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 08:35:00,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:35:00,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365082314] [2023-08-24 08:35:00,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365082314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:35:00,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944753834] [2023-08-24 08:35:00,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:35:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:35:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:35:00,793 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 08:35:00,795 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 08:35:00,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:35:00,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:35:00,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 08:35:00,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:35:01,207 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 08:35:01,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:35:01,302 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:35:01,303 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 08:35:01,449 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 08:35:01,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944753834] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:35:01,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:35:01,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2023-08-24 08:35:01,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141841393] [2023-08-24 08:35:01,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:35:01,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 08:35:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:35:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 08:35:01,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2023-08-24 08:35:01,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 502 [2023-08-24 08:35:01,456 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 08:35:01,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:35:01,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 502 [2023-08-24 08:35:01,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:35:30,999 INFO L124 PetriNetUnfolderBase]: 88318/119981 cut-off events. [2023-08-24 08:35:30,999 INFO L125 PetriNetUnfolderBase]: For 1914959/1916763 co-relation queries the response was YES. [2023-08-24 08:35:32,430 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 08:35:33,193 INFO L140 encePairwiseOnDemand]: 486/502 looper letters, 1076 selfloop transitions, 2293 changer transitions 0/3395 dead transitions. [2023-08-24 08:35:33,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 3395 transitions, 55151 flow [2023-08-24 08:35:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 08:35:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 08:35:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5576 transitions. [2023-08-24 08:35:33,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31735913488901535 [2023-08-24 08:35:33,202 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5576 transitions. [2023-08-24 08:35:33,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5576 transitions. [2023-08-24 08:35:33,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:35:33,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5576 transitions. [2023-08-24 08:35:33,212 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 08:35:33,225 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 08:35:33,227 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 08:35:33,227 INFO L175 Difference]: Start difference. First operand has 196 places, 1367 transitions, 21058 flow. Second operand 35 states and 5576 transitions. [2023-08-24 08:35:33,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 3395 transitions, 55151 flow [2023-08-24 08:36:57,014 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 08:36:57,052 INFO L231 Difference]: Finished difference. Result has 250 places, 2748 transitions, 47841 flow [2023-08-24 08:36:57,053 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 08:36:57,053 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 214 predicate places. [2023-08-24 08:36:57,053 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 2748 transitions, 47841 flow [2023-08-24 08:36:57,054 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 08:36:57,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:36:57,054 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 08:36:57,059 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 08:36:57,255 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 08:36:57,255 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 08:36:57,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:36:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1197425039, now seen corresponding path program 6 times [2023-08-24 08:36:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:36:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187188850] [2023-08-24 08:36:57,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:36:57,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:36:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:36:57,876 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 08:36:57,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:36:57,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187188850] [2023-08-24 08:36:57,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187188850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:36:57,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012663337] [2023-08-24 08:36:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:36:57,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:36:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:36:57,878 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 08:36:57,880 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 08:36:58,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:36:58,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:36:58,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-24 08:36:58,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:36:58,366 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:36:58,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 11 [2023-08-24 08:36:58,424 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 08:36:58,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:36:58,522 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:36:58,522 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 08:36:58,743 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 08:36:58,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012663337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:36:58,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:36:58,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 31 [2023-08-24 08:36:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375824731] [2023-08-24 08:36:58,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:36:58,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:36:58,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:36:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:36:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-08-24 08:36:58,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 502 [2023-08-24 08:36:58,749 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 08:36:58,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:36:58,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 502 [2023-08-24 08:36:58,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:37:54,533 INFO L124 PetriNetUnfolderBase]: 108546/146459 cut-off events. [2023-08-24 08:37:54,533 INFO L125 PetriNetUnfolderBase]: For 2833670/2833670 co-relation queries the response was YES. [2023-08-24 08:37:57,248 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 08:37:58,088 INFO L140 encePairwiseOnDemand]: 487/502 looper letters, 1561 selfloop transitions, 2834 changer transitions 6/4401 dead transitions. [2023-08-24 08:37:58,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 4401 transitions, 82966 flow [2023-08-24 08:37:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 08:37:58,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 08:37:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 6224 transitions. [2023-08-24 08:37:58,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29520015177385694 [2023-08-24 08:37:58,096 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 6224 transitions. [2023-08-24 08:37:58,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 6224 transitions. [2023-08-24 08:37:58,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:37:58,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 6224 transitions. [2023-08-24 08:37:58,105 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 08:37:58,122 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 08:37:58,125 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 08:37:58,125 INFO L175 Difference]: Start difference. First operand has 250 places, 2748 transitions, 47841 flow. Second operand 42 states and 6224 transitions. [2023-08-24 08:37:58,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 4401 transitions, 82966 flow [2023-08-24 08:42:47,572 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 08:42:47,637 INFO L231 Difference]: Finished difference. Result has 316 places, 3561 transitions, 70941 flow [2023-08-24 08:42:47,639 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 08:42:47,639 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 280 predicate places. [2023-08-24 08:42:47,639 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 3561 transitions, 70941 flow [2023-08-24 08:42:47,640 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 08:42:47,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:42:47,640 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 08:42:47,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 08:42:47,845 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 08:42:47,846 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 08:42:47,846 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:42:47,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1970173007, now seen corresponding path program 7 times [2023-08-24 08:42:47,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:42:47,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562877344] [2023-08-24 08:42:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:42:47,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:42:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:42:48,303 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 08:42:48,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:42:48,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562877344] [2023-08-24 08:42:48,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562877344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:42:48,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552450397] [2023-08-24 08:42:48,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:42:48,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:42:48,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:42:48,305 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 08:42:48,307 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 08:42:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:42:48,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 08:42:48,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:42:48,756 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:42:48,757 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 08:42:48,812 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 08:42:48,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:42:48,949 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:42:48,950 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 08:42:49,161 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 08:42:49,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552450397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:42:49,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:42:49,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 33 [2023-08-24 08:42:49,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432710615] [2023-08-24 08:42:49,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:42:49,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 08:42:49,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:42:49,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 08:42:49,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 08:42:49,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 502 [2023-08-24 08:42:49,168 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 08:42:49,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:42:49,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 502 [2023-08-24 08:42:49,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand