/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:22:51,204 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:22:51,298 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-SemanticLbe.epf [2023-11-17 16:22:51,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:22:51,330 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:22:51,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:22:51,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:22:51,331 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:22:51,332 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:22:51,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:22:51,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:22:51,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:22:51,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:22:51,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:22:51,338 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:22:51,338 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:22:51,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:22:51,339 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:22:51,339 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:22:51,339 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:22:51,339 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:22:51,341 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:22:51,341 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:22:51,341 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:22:51,342 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:22:51,342 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:22:51,342 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:22:51,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:22:51,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:22:51,343 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:22:51,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:22:51,344 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:22:51,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:22:51,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:22:51,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:22:51,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:22:51,617 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:22:51,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:22:51,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-11-17 16:22:52,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:22:52,977 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:22:52,978 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-multiply-verify.wvr.c [2023-11-17 16:22:52,984 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04d66dd5/1cee2d1f69304303923b6a98532b82d2/FLAG8bf9e56fe [2023-11-17 16:22:52,995 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04d66dd5/1cee2d1f69304303923b6a98532b82d2 [2023-11-17 16:22:52,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:22:52,999 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:22:53,000 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:22:53,000 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:22:53,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:22:53,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:22:52" (1/1) ... [2023-11-17 16:22:53,009 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@befdf82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53, skipping insertion in model container [2023-11-17 16:22:53,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:22:52" (1/1) ... [2023-11-17 16:22:53,034 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:22:53,173 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-more-multiply-verify.wvr.c[3081,3094] [2023-11-17 16:22:53,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:22:53,189 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:22:53,212 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-more-multiply-verify.wvr.c[3081,3094] [2023-11-17 16:22:53,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:22:53,222 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:22:53,223 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:22:53,229 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:22:53,230 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53 WrapperNode [2023-11-17 16:22:53,230 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:22:53,231 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:22:53,231 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:22:53,231 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:22:53,236 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,269 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 189 [2023-11-17 16:22:53,270 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:22:53,270 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:22:53,270 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:22:53,271 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:22:53,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,286 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,288 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,289 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,296 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,312 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,314 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,316 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:22:53,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:22:53,324 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:22:53,324 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:22:53,325 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (1/1) ... [2023-11-17 16:22:53,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:22:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:22:53,353 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) [2023-11-17 16:22:53,385 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:22:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:22:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:22:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:22:53,386 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:22:53,386 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:22:53,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:22:53,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:22:53,387 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:22:53,387 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:22:53,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:22:53,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:22:53,388 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:22:53,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:22:53,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:22:53,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:22:53,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:22:53,390 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:22:53,378 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 [2023-11-17 16:22:53,541 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:22:53,545 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:22:53,922 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:22:54,028 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:22:54,029 INFO L307 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-17 16:22:54,030 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:22:54 BoogieIcfgContainer [2023-11-17 16:22:54,030 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:22:54,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:22:54,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:22:54,037 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:22:54,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:22:52" (1/3) ... [2023-11-17 16:22:54,038 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d560306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:22:54, skipping insertion in model container [2023-11-17 16:22:54,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:22:53" (2/3) ... [2023-11-17 16:22:54,039 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d560306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:22:54, skipping insertion in model container [2023-11-17 16:22:54,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:22:54" (3/3) ... [2023-11-17 16:22:54,040 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-multiply-verify.wvr.c [2023-11-17 16:22:54,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:22:54,056 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:22:54,057 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:22:54,117 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:22:54,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 161 transitions, 343 flow [2023-11-17 16:22:54,203 INFO L124 PetriNetUnfolderBase]: 9/158 cut-off events. [2023-11-17 16:22:54,203 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:22:54,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171 conditions, 158 events. 9/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-11-17 16:22:54,212 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 161 transitions, 343 flow [2023-11-17 16:22:54,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 148 places, 147 transitions, 312 flow [2023-11-17 16:22:54,225 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:22:54,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 148 places, 147 transitions, 312 flow [2023-11-17 16:22:54,239 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 148 places, 147 transitions, 312 flow [2023-11-17 16:22:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 147 transitions, 312 flow [2023-11-17 16:22:54,278 INFO L124 PetriNetUnfolderBase]: 9/147 cut-off events. [2023-11-17 16:22:54,279 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:22:54,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 147 events. 9/147 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 106 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 121. Up to 2 conditions per place. [2023-11-17 16:22:54,282 INFO L119 LiptonReduction]: Number of co-enabled transitions 1814 [2023-11-17 16:22:58,561 INFO L134 LiptonReduction]: Checked pairs total: 1829 [2023-11-17 16:22:58,562 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-11-17 16:22:58,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:22:58,582 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=LoopHeads, 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;@6dbb0620, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:22:58,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:22:58,604 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:22:58,604 INFO L124 PetriNetUnfolderBase]: 3/21 cut-off events. [2023-11-17 16:22:58,604 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:22:58,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:22:58,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:22:58,608 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)] === [2023-11-17 16:22:58,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:22:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2089846243, now seen corresponding path program 1 times [2023-11-17 16:22:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:22:58,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350747094] [2023-11-17 16:22:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:22:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:22:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:22:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:22:59,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:22:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350747094] [2023-11-17 16:22:59,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350747094] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:22:59,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:22:59,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:22:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245712316] [2023-11-17 16:22:59,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:22:59,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:22:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:22:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:22:59,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:22:59,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 302 [2023-11-17 16:22:59,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:22:59,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 302 [2023-11-17 16:22:59,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:22:59,187 INFO L124 PetriNetUnfolderBase]: 108/180 cut-off events. [2023-11-17 16:22:59,187 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-17 16:22:59,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 180 events. 108/180 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 418 event pairs, 29 based on Foata normal form. 8/153 useless extension candidates. Maximal degree in co-relation 300. Up to 125 conditions per place. [2023-11-17 16:22:59,190 INFO L140 encePairwiseOnDemand]: 298/302 looper letters, 30 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-17 16:22:59,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 33 transitions, 156 flow [2023-11-17 16:22:59,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:22:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:22:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-11-17 16:22:59,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4977924944812362 [2023-11-17 16:22:59,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-11-17 16:22:59,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-11-17 16:22:59,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:22:59,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-11-17 16:22:59,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,233 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 302.0) internal successors, (1208), 4 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,235 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 62 flow. Second operand 3 states and 451 transitions. [2023-11-17 16:22:59,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 33 transitions, 156 flow [2023-11-17 16:22:59,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 16:22:59,240 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 69 flow [2023-11-17 16:22:59,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-11-17 16:22:59,244 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -3 predicate places. [2023-11-17 16:22:59,245 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 69 flow [2023-11-17 16:22:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:22:59,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:22:59,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:22:59,246 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)] === [2023-11-17 16:22:59,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:22:59,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1246599417, now seen corresponding path program 2 times [2023-11-17 16:22:59,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:22:59,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310512668] [2023-11-17 16:22:59,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:22:59,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:22:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:22:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:22:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:22:59,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310512668] [2023-11-17 16:22:59,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310512668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:22:59,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:22:59,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:22:59,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093747394] [2023-11-17 16:22:59,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:22:59,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:22:59,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:22:59,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:22:59,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:22:59,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 302 [2023-11-17 16:22:59,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:22:59,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 302 [2023-11-17 16:22:59,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:22:59,618 INFO L124 PetriNetUnfolderBase]: 141/235 cut-off events. [2023-11-17 16:22:59,618 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-11-17 16:22:59,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 235 events. 141/235 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 555 event pairs, 82 based on Foata normal form. 18/251 useless extension candidates. Maximal degree in co-relation 234. Up to 181 conditions per place. [2023-11-17 16:22:59,620 INFO L140 encePairwiseOnDemand]: 297/302 looper letters, 23 selfloop transitions, 2 changer transitions 11/36 dead transitions. [2023-11-17 16:22:59,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 36 transitions, 168 flow [2023-11-17 16:22:59,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:22:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:22:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 544 transitions. [2023-11-17 16:22:59,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4503311258278146 [2023-11-17 16:22:59,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 544 transitions. [2023-11-17 16:22:59,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 544 transitions. [2023-11-17 16:22:59,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:22:59,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 544 transitions. [2023-11-17 16:22:59,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,628 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,628 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 69 flow. Second operand 4 states and 544 transitions. [2023-11-17 16:22:59,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 36 transitions, 168 flow [2023-11-17 16:22:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 36 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:22:59,630 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 82 flow [2023-11-17 16:22:59,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-11-17 16:22:59,631 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2023-11-17 16:22:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 82 flow [2023-11-17 16:22:59,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.8) internal successors, (654), 5 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:22:59,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:22:59,632 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] [2023-11-17 16:22:59,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:22:59,632 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)] === [2023-11-17 16:22:59,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:22:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2031087763, now seen corresponding path program 1 times [2023-11-17 16:22:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:22:59,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978004387] [2023-11-17 16:22:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:22:59,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:22:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:22:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:22:59,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:22:59,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978004387] [2023-11-17 16:22:59,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978004387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:22:59,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528208749] [2023-11-17 16:22:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:22:59,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:22:59,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:22:59,777 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) [2023-11-17 16:22:59,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:22:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:22:59,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:22:59,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:00,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:00,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:00,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528208749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:00,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:00,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 16:23:00,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742322443] [2023-11-17 16:23:00,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:00,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 16:23:00,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 16:23:00,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-17 16:23:00,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 302 [2023-11-17 16:23:00,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 82 flow. Second operand has 12 states, 12 states have (on average 130.16666666666666) internal successors, (1562), 12 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:00,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:00,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 302 [2023-11-17 16:23:00,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:00,294 INFO L124 PetriNetUnfolderBase]: 175/292 cut-off events. [2023-11-17 16:23:00,294 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-11-17 16:23:00,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 292 events. 175/292 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 799 event pairs, 82 based on Foata normal form. 22/312 useless extension candidates. Maximal degree in co-relation 715. Up to 181 conditions per place. [2023-11-17 16:23:00,296 INFO L140 encePairwiseOnDemand]: 296/302 looper letters, 23 selfloop transitions, 3 changer transitions 24/50 dead transitions. [2023-11-17 16:23:00,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 250 flow [2023-11-17 16:23:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:23:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:23:00,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 813 transitions. [2023-11-17 16:23:00,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44867549668874174 [2023-11-17 16:23:00,300 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 813 transitions. [2023-11-17 16:23:00,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 813 transitions. [2023-11-17 16:23:00,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:00,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 813 transitions. [2023-11-17 16:23:00,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.5) internal successors, (813), 6 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:00,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:00,306 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:00,307 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 82 flow. Second operand 6 states and 813 transitions. [2023-11-17 16:23:00,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 250 flow [2023-11-17 16:23:00,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 50 transitions, 238 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 16:23:00,309 INFO L231 Difference]: Finished difference. Result has 35 places, 26 transitions, 100 flow [2023-11-17 16:23:00,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=35, PETRI_TRANSITIONS=26} [2023-11-17 16:23:00,309 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 6 predicate places. [2023-11-17 16:23:00,310 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 26 transitions, 100 flow [2023-11-17 16:23:00,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.16666666666666) internal successors, (1562), 12 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:00,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:00,311 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] [2023-11-17 16:23:00,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:00,517 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 [2023-11-17 16:23:00,518 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)] === [2023-11-17 16:23:00,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:00,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1522716635, now seen corresponding path program 2 times [2023-11-17 16:23:00,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:00,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608890133] [2023-11-17 16:23:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:00,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:01,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:01,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608890133] [2023-11-17 16:23:01,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608890133] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:01,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585217594] [2023-11-17 16:23:01,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:23:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:01,901 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) [2023-11-17 16:23:01,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:23:02,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:23:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:02,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:23:02,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:02,080 INFO L378 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 436 treesize of output 420 [2023-11-17 16:23:02,232 INFO L378 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 22 treesize of output 17 [2023-11-17 16:23:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:02,368 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:02,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585217594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:02,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:02,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-17 16:23:02,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590678236] [2023-11-17 16:23:02,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:02,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:23:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:23:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:23:02,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:23:02,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 100 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:02,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:02,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:23:02,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:02,729 INFO L124 PetriNetUnfolderBase]: 169/288 cut-off events. [2023-11-17 16:23:02,729 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-11-17 16:23:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 288 events. 169/288 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 853 event pairs, 32 based on Foata normal form. 13/300 useless extension candidates. Maximal degree in co-relation 763. Up to 137 conditions per place. [2023-11-17 16:23:02,732 INFO L140 encePairwiseOnDemand]: 290/302 looper letters, 49 selfloop transitions, 14 changer transitions 13/76 dead transitions. [2023-11-17 16:23:02,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 76 transitions, 387 flow [2023-11-17 16:23:02,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:02,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:02,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1085 transitions. [2023-11-17 16:23:02,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919058130978663 [2023-11-17 16:23:02,738 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1085 transitions. [2023-11-17 16:23:02,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1085 transitions. [2023-11-17 16:23:02,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:02,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1085 transitions. [2023-11-17 16:23:02,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.55555555555556) internal successors, (1085), 9 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:02,746 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:02,746 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:02,746 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 100 flow. Second operand 9 states and 1085 transitions. [2023-11-17 16:23:02,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 76 transitions, 387 flow [2023-11-17 16:23:02,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 76 transitions, 359 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-11-17 16:23:02,752 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 179 flow [2023-11-17 16:23:02,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=179, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-11-17 16:23:02,754 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 14 predicate places. [2023-11-17 16:23:02,756 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 179 flow [2023-11-17 16:23:02,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:02,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:02,761 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] [2023-11-17 16:23:02,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:02,967 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,SelfDestructingSolverStorable3 [2023-11-17 16:23:02,967 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)] === [2023-11-17 16:23:02,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash -566419241, now seen corresponding path program 3 times [2023-11-17 16:23:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:02,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072345176] [2023-11-17 16:23:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:02,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:05,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072345176] [2023-11-17 16:23:05,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072345176] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:05,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941666795] [2023-11-17 16:23:05,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:23:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:05,105 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) [2023-11-17 16:23:05,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:23:05,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:23:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:05,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:23:05,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:05,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:05,436 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:05,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941666795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:05,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:05,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-11-17 16:23:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530803458] [2023-11-17 16:23:05,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:05,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:23:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:23:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:23:05,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 302 [2023-11-17 16:23:05,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 179 flow. Second operand has 8 states, 8 states have (on average 123.5) internal successors, (988), 8 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:05,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:05,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 302 [2023-11-17 16:23:05,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:05,707 INFO L124 PetriNetUnfolderBase]: 245/402 cut-off events. [2023-11-17 16:23:05,707 INFO L125 PetriNetUnfolderBase]: For 610/610 co-relation queries the response was YES. [2023-11-17 16:23:05,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1439 conditions, 402 events. 245/402 cut-off events. For 610/610 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1284 event pairs, 53 based on Foata normal form. 5/407 useless extension candidates. Maximal degree in co-relation 1424. Up to 215 conditions per place. [2023-11-17 16:23:05,710 INFO L140 encePairwiseOnDemand]: 292/302 looper letters, 52 selfloop transitions, 21 changer transitions 13/86 dead transitions. [2023-11-17 16:23:05,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 86 transitions, 552 flow [2023-11-17 16:23:05,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:23:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:23:05,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1042 transitions. [2023-11-17 16:23:05,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43129139072847683 [2023-11-17 16:23:05,714 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1042 transitions. [2023-11-17 16:23:05,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1042 transitions. [2023-11-17 16:23:05,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:05,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1042 transitions. [2023-11-17 16:23:05,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.25) internal successors, (1042), 8 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:05,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 302.0) internal successors, (2718), 9 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:05,723 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 302.0) internal successors, (2718), 9 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:05,724 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 179 flow. Second operand 8 states and 1042 transitions. [2023-11-17 16:23:05,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 86 transitions, 552 flow [2023-11-17 16:23:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 86 transitions, 523 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-11-17 16:23:05,729 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 344 flow [2023-11-17 16:23:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=344, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-11-17 16:23:05,731 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 23 predicate places. [2023-11-17 16:23:05,732 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 344 flow [2023-11-17 16:23:05,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.5) internal successors, (988), 8 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:05,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:05,732 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] [2023-11-17 16:23:05,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:05,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:05,939 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)] === [2023-11-17 16:23:05,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash -371066111, now seen corresponding path program 4 times [2023-11-17 16:23:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775702619] [2023-11-17 16:23:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:05,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775702619] [2023-11-17 16:23:07,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775702619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:07,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650247275] [2023-11-17 16:23:07,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:23:07,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:07,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:07,018 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) [2023-11-17 16:23:07,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:23:07,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:23:07,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:07,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 16:23:07,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:07,146 INFO L378 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 147 treesize of output 143 [2023-11-17 16:23:07,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-11-17 16:23:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:07,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:07,993 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:07,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 87 [2023-11-17 16:23:08,002 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:08,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-11-17 16:23:08,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:08,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650247275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:08,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:08,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-11-17 16:23:08,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564576500] [2023-11-17 16:23:08,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:08,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 16:23:08,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:08,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 16:23:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=846, Unknown=1, NotChecked=0, Total=992 [2023-11-17 16:23:08,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 302 [2023-11-17 16:23:08,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 344 flow. Second operand has 32 states, 32 states have (on average 100.96875) internal successors, (3231), 32 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:08,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:08,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 302 [2023-11-17 16:23:08,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:12,147 INFO L124 PetriNetUnfolderBase]: 798/1347 cut-off events. [2023-11-17 16:23:12,147 INFO L125 PetriNetUnfolderBase]: For 3351/3351 co-relation queries the response was YES. [2023-11-17 16:23:12,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5837 conditions, 1347 events. 798/1347 cut-off events. For 3351/3351 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6371 event pairs, 137 based on Foata normal form. 2/1349 useless extension candidates. Maximal degree in co-relation 5798. Up to 432 conditions per place. [2023-11-17 16:23:12,158 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 223 selfloop transitions, 91 changer transitions 36/350 dead transitions. [2023-11-17 16:23:12,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 350 transitions, 2559 flow [2023-11-17 16:23:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-17 16:23:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-11-17 16:23:12,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4147 transitions. [2023-11-17 16:23:12,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35209713024282563 [2023-11-17 16:23:12,170 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4147 transitions. [2023-11-17 16:23:12,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4147 transitions. [2023-11-17 16:23:12,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:12,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4147 transitions. [2023-11-17 16:23:12,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 106.33333333333333) internal successors, (4147), 39 states have internal predecessors, (4147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:12,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 302.0) internal successors, (12080), 40 states have internal predecessors, (12080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:12,205 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 302.0) internal successors, (12080), 40 states have internal predecessors, (12080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:12,206 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 344 flow. Second operand 39 states and 4147 transitions. [2023-11-17 16:23:12,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 350 transitions, 2559 flow [2023-11-17 16:23:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 350 transitions, 2469 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-17 16:23:12,223 INFO L231 Difference]: Finished difference. Result has 102 places, 144 transitions, 1391 flow [2023-11-17 16:23:12,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1391, PETRI_PLACES=102, PETRI_TRANSITIONS=144} [2023-11-17 16:23:12,225 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2023-11-17 16:23:12,225 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 144 transitions, 1391 flow [2023-11-17 16:23:12,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 100.96875) internal successors, (3231), 32 states have internal predecessors, (3231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:12,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:12,227 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] [2023-11-17 16:23:12,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:12,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:12,433 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)] === [2023-11-17 16:23:12,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:12,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1869944761, now seen corresponding path program 5 times [2023-11-17 16:23:12,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:12,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833570533] [2023-11-17 16:23:12,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:12,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:14,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:14,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:14,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833570533] [2023-11-17 16:23:14,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833570533] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:14,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193191751] [2023-11-17 16:23:14,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:23:14,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:14,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:14,013 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) [2023-11-17 16:23:14,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:23:14,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:23:14,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:14,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:23:14,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:14,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:14,751 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:14,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-17 16:23:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:15,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193191751] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:15,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:15,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-11-17 16:23:15,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092161214] [2023-11-17 16:23:15,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:15,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:23:15,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:15,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:23:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:23:15,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 302 [2023-11-17 16:23:15,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 144 transitions, 1391 flow. Second operand has 31 states, 31 states have (on average 95.03225806451613) internal successors, (2946), 31 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:15,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:15,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 302 [2023-11-17 16:23:15,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:18,732 INFO L124 PetriNetUnfolderBase]: 1067/1930 cut-off events. [2023-11-17 16:23:18,733 INFO L125 PetriNetUnfolderBase]: For 11618/11618 co-relation queries the response was YES. [2023-11-17 16:23:18,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10143 conditions, 1930 events. 1067/1930 cut-off events. For 11618/11618 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10914 event pairs, 149 based on Foata normal form. 3/1933 useless extension candidates. Maximal degree in co-relation 10106. Up to 489 conditions per place. [2023-11-17 16:23:18,749 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 219 selfloop transitions, 167 changer transitions 28/414 dead transitions. [2023-11-17 16:23:18,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 414 transitions, 4013 flow [2023-11-17 16:23:18,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 16:23:18,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 16:23:18,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3371 transitions. [2023-11-17 16:23:18,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33825005017057996 [2023-11-17 16:23:18,760 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3371 transitions. [2023-11-17 16:23:18,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3371 transitions. [2023-11-17 16:23:18,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:18,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3371 transitions. [2023-11-17 16:23:18,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 102.15151515151516) internal successors, (3371), 33 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 302.0) internal successors, (10268), 34 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,782 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 302.0) internal successors, (10268), 34 states have internal predecessors, (10268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,783 INFO L175 Difference]: Start difference. First operand has 102 places, 144 transitions, 1391 flow. Second operand 33 states and 3371 transitions. [2023-11-17 16:23:18,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 414 transitions, 4013 flow [2023-11-17 16:23:18,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 414 transitions, 3595 flow, removed 205 selfloop flow, removed 7 redundant places. [2023-11-17 16:23:18,826 INFO L231 Difference]: Finished difference. Result has 143 places, 220 transitions, 2538 flow [2023-11-17 16:23:18,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2538, PETRI_PLACES=143, PETRI_TRANSITIONS=220} [2023-11-17 16:23:18,827 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2023-11-17 16:23:18,827 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 220 transitions, 2538 flow [2023-11-17 16:23:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 95.03225806451613) internal successors, (2946), 31 states have internal predecessors, (2946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:18,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:18,835 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] [2023-11-17 16:23:18,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:19,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:19,045 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)] === [2023-11-17 16:23:19,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:19,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1307049281, now seen corresponding path program 6 times [2023-11-17 16:23:19,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:19,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645600565] [2023-11-17 16:23:19,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:19,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:20,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645600565] [2023-11-17 16:23:20,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645600565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:20,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133091968] [2023-11-17 16:23:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:23:20,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:20,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:20,482 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) [2023-11-17 16:23:20,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:23:20,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 16:23:20,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:20,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:23:20,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:20,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:20,821 INFO L378 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 22 treesize of output 17 [2023-11-17 16:23:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:20,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:20,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133091968] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:20,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:20,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-11-17 16:23:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028802136] [2023-11-17 16:23:20,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:23:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:23:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:23:20,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:23:20,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 220 transitions, 2538 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:20,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:20,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:23:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:21,517 INFO L124 PetriNetUnfolderBase]: 1110/2014 cut-off events. [2023-11-17 16:23:21,517 INFO L125 PetriNetUnfolderBase]: For 25060/25060 co-relation queries the response was YES. [2023-11-17 16:23:21,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12833 conditions, 2014 events. 1110/2014 cut-off events. For 25060/25060 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11418 event pairs, 263 based on Foata normal form. 10/2024 useless extension candidates. Maximal degree in co-relation 12704. Up to 1447 conditions per place. [2023-11-17 16:23:21,543 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 177 selfloop transitions, 74 changer transitions 16/267 dead transitions. [2023-11-17 16:23:21,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 267 transitions, 3550 flow [2023-11-17 16:23:21,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:21,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:21,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1083 transitions. [2023-11-17 16:23:21,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3984547461368653 [2023-11-17 16:23:21,546 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1083 transitions. [2023-11-17 16:23:21,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1083 transitions. [2023-11-17 16:23:21,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:21,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1083 transitions. [2023-11-17 16:23:21,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.33333333333333) internal successors, (1083), 9 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:21,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:21,551 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:21,551 INFO L175 Difference]: Start difference. First operand has 143 places, 220 transitions, 2538 flow. Second operand 9 states and 1083 transitions. [2023-11-17 16:23:21,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 267 transitions, 3550 flow [2023-11-17 16:23:21,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 267 transitions, 3241 flow, removed 121 selfloop flow, removed 10 redundant places. [2023-11-17 16:23:21,643 INFO L231 Difference]: Finished difference. Result has 142 places, 226 transitions, 2564 flow [2023-11-17 16:23:21,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2223, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2564, PETRI_PLACES=142, PETRI_TRANSITIONS=226} [2023-11-17 16:23:21,644 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 113 predicate places. [2023-11-17 16:23:21,644 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 226 transitions, 2564 flow [2023-11-17 16:23:21,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:21,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:21,645 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] [2023-11-17 16:23:21,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-17 16:23:21,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:21,851 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)] === [2023-11-17 16:23:21,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:21,851 INFO L85 PathProgramCache]: Analyzing trace with hash 831004051, now seen corresponding path program 7 times [2023-11-17 16:23:21,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:21,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748379755] [2023-11-17 16:23:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:21,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:22,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748379755] [2023-11-17 16:23:22,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748379755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:22,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333120804] [2023-11-17 16:23:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:23:22,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:22,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:22,684 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) [2023-11-17 16:23:22,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:23:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:22,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:23:22,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:22,803 INFO L378 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 186 treesize of output 178 [2023-11-17 16:23:22,972 INFO L378 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 36 treesize of output 29 [2023-11-17 16:23:23,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:23,040 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:23,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333120804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:23,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:23,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-17 16:23:23,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125938491] [2023-11-17 16:23:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:23,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:23:23,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:23,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:23:23,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:23:23,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:23:23,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 226 transitions, 2564 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:23,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:23:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:23,641 INFO L124 PetriNetUnfolderBase]: 1095/1991 cut-off events. [2023-11-17 16:23:23,642 INFO L125 PetriNetUnfolderBase]: For 26347/26347 co-relation queries the response was YES. [2023-11-17 16:23:23,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12845 conditions, 1991 events. 1095/1991 cut-off events. For 26347/26347 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11293 event pairs, 248 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 12739. Up to 1426 conditions per place. [2023-11-17 16:23:23,665 INFO L140 encePairwiseOnDemand]: 292/302 looper letters, 176 selfloop transitions, 69 changer transitions 19/264 dead transitions. [2023-11-17 16:23:23,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 264 transitions, 3414 flow [2023-11-17 16:23:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:23,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:23,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1082 transitions. [2023-11-17 16:23:23,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3980868285504047 [2023-11-17 16:23:23,669 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1082 transitions. [2023-11-17 16:23:23,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1082 transitions. [2023-11-17 16:23:23,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:23,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1082 transitions. [2023-11-17 16:23:23,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.22222222222223) internal successors, (1082), 9 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:23,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:23,673 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:23,674 INFO L175 Difference]: Start difference. First operand has 142 places, 226 transitions, 2564 flow. Second operand 9 states and 1082 transitions. [2023-11-17 16:23:23,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 264 transitions, 3414 flow [2023-11-17 16:23:23,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 264 transitions, 3202 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-11-17 16:23:23,776 INFO L231 Difference]: Finished difference. Result has 145 places, 220 transitions, 2432 flow [2023-11-17 16:23:23,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2366, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2432, PETRI_PLACES=145, PETRI_TRANSITIONS=220} [2023-11-17 16:23:23,777 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2023-11-17 16:23:23,777 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 220 transitions, 2432 flow [2023-11-17 16:23:23,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:23,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:23,777 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] [2023-11-17 16:23:23,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:23,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:23,984 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)] === [2023-11-17 16:23:23,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:23,984 INFO L85 PathProgramCache]: Analyzing trace with hash -507284705, now seen corresponding path program 8 times [2023-11-17 16:23:23,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:23,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021649053] [2023-11-17 16:23:23,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:23,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:25,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:25,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021649053] [2023-11-17 16:23:25,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021649053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:25,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138452895] [2023-11-17 16:23:25,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:23:25,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:25,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:25,403 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) [2023-11-17 16:23:25,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:23:25,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:23:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:25,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:23:25,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:25,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:25,652 INFO L378 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 22 treesize of output 17 [2023-11-17 16:23:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:25,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:25,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138452895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:25,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:25,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-11-17 16:23:25,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163817015] [2023-11-17 16:23:25,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:23:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:23:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:23:25,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:23:25,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 220 transitions, 2432 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:25,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:25,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:23:25,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:26,270 INFO L124 PetriNetUnfolderBase]: 1084/1967 cut-off events. [2023-11-17 16:23:26,270 INFO L125 PetriNetUnfolderBase]: For 23368/23368 co-relation queries the response was YES. [2023-11-17 16:23:26,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12423 conditions, 1967 events. 1084/1967 cut-off events. For 23368/23368 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11110 event pairs, 225 based on Foata normal form. 2/1965 useless extension candidates. Maximal degree in co-relation 12316. Up to 1192 conditions per place. [2023-11-17 16:23:26,296 INFO L140 encePairwiseOnDemand]: 290/302 looper letters, 164 selfloop transitions, 77 changer transitions 16/257 dead transitions. [2023-11-17 16:23:26,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 257 transitions, 3262 flow [2023-11-17 16:23:26,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1085 transitions. [2023-11-17 16:23:26,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919058130978663 [2023-11-17 16:23:26,300 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1085 transitions. [2023-11-17 16:23:26,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1085 transitions. [2023-11-17 16:23:26,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:26,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1085 transitions. [2023-11-17 16:23:26,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.55555555555556) internal successors, (1085), 9 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:26,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:26,307 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:26,307 INFO L175 Difference]: Start difference. First operand has 145 places, 220 transitions, 2432 flow. Second operand 9 states and 1085 transitions. [2023-11-17 16:23:26,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 257 transitions, 3262 flow [2023-11-17 16:23:26,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 257 transitions, 3092 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-11-17 16:23:26,375 INFO L231 Difference]: Finished difference. Result has 144 places, 220 transitions, 2478 flow [2023-11-17 16:23:26,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2478, PETRI_PLACES=144, PETRI_TRANSITIONS=220} [2023-11-17 16:23:26,376 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 115 predicate places. [2023-11-17 16:23:26,376 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 220 transitions, 2478 flow [2023-11-17 16:23:26,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:26,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:26,377 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] [2023-11-17 16:23:26,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:26,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 16:23:26,578 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)] === [2023-11-17 16:23:26,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:26,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1786355493, now seen corresponding path program 9 times [2023-11-17 16:23:26,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:26,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048293369] [2023-11-17 16:23:26,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:26,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:27,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:27,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:27,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048293369] [2023-11-17 16:23:27,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048293369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:27,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124067636] [2023-11-17 16:23:27,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:23:27,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:27,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:27,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:27,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:23:27,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:23:27,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:27,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 16:23:27,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:27,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:27,619 INFO L378 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 36 treesize of output 29 [2023-11-17 16:23:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:27,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:27,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124067636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:27,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:27,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 18 [2023-11-17 16:23:27,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555690336] [2023-11-17 16:23:27,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:27,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:23:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:27,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:23:27,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:23:27,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:23:27,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 220 transitions, 2478 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:27,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:27,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:23:27,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:28,253 INFO L124 PetriNetUnfolderBase]: 1074/1942 cut-off events. [2023-11-17 16:23:28,253 INFO L125 PetriNetUnfolderBase]: For 22796/22796 co-relation queries the response was YES. [2023-11-17 16:23:28,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12389 conditions, 1942 events. 1074/1942 cut-off events. For 22796/22796 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10898 event pairs, 222 based on Foata normal form. 2/1940 useless extension candidates. Maximal degree in co-relation 12285. Up to 1171 conditions per place. [2023-11-17 16:23:28,280 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 163 selfloop transitions, 72 changer transitions 19/254 dead transitions. [2023-11-17 16:23:28,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 254 transitions, 3256 flow [2023-11-17 16:23:28,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:28,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:28,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1085 transitions. [2023-11-17 16:23:28,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39919058130978663 [2023-11-17 16:23:28,282 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1085 transitions. [2023-11-17 16:23:28,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1085 transitions. [2023-11-17 16:23:28,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:28,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1085 transitions. [2023-11-17 16:23:28,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 120.55555555555556) internal successors, (1085), 9 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:28,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:28,287 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:28,287 INFO L175 Difference]: Start difference. First operand has 144 places, 220 transitions, 2478 flow. Second operand 9 states and 1085 transitions. [2023-11-17 16:23:28,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 254 transitions, 3256 flow [2023-11-17 16:23:28,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 254 transitions, 3128 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-17 16:23:28,348 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2423 flow [2023-11-17 16:23:28,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2350, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2423, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2023-11-17 16:23:28,349 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2023-11-17 16:23:28,349 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2423 flow [2023-11-17 16:23:28,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:28,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:28,349 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] [2023-11-17 16:23:28,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:28,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:28,555 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)] === [2023-11-17 16:23:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 423962549, now seen corresponding path program 10 times [2023-11-17 16:23:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:28,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294404181] [2023-11-17 16:23:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:28,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:28,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:29,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:29,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294404181] [2023-11-17 16:23:29,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294404181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:29,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940878679] [2023-11-17 16:23:29,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:23:29,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:29,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:29,359 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:29,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:23:29,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:23:29,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:29,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 16:23:29,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:29,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:29,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:29,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 58 [2023-11-17 16:23:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:30,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940878679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:30,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:30,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 28 [2023-11-17 16:23:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20761348] [2023-11-17 16:23:30,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:30,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:23:30,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:30,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:23:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:23:30,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 302 [2023-11-17 16:23:30,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2423 flow. Second operand has 30 states, 30 states have (on average 106.1) internal successors, (3183), 30 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:30,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:30,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 302 [2023-11-17 16:23:30,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:32,073 INFO L124 PetriNetUnfolderBase]: 1313/2540 cut-off events. [2023-11-17 16:23:32,074 INFO L125 PetriNetUnfolderBase]: For 28069/28069 co-relation queries the response was YES. [2023-11-17 16:23:32,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15330 conditions, 2540 events. 1313/2540 cut-off events. For 28069/28069 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16413 event pairs, 230 based on Foata normal form. 2/2538 useless extension candidates. Maximal degree in co-relation 15165. Up to 514 conditions per place. [2023-11-17 16:23:32,095 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 239 selfloop transitions, 198 changer transitions 26/463 dead transitions. [2023-11-17 16:23:32,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 463 transitions, 5393 flow [2023-11-17 16:23:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:23:32,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:23:32,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3265 transitions. [2023-11-17 16:23:32,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3728020095912309 [2023-11-17 16:23:32,099 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3265 transitions. [2023-11-17 16:23:32,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3265 transitions. [2023-11-17 16:23:32,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:32,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3265 transitions. [2023-11-17 16:23:32,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 112.58620689655173) internal successors, (3265), 29 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:32,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 302.0) internal successors, (9060), 30 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:32,114 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 302.0) internal successors, (9060), 30 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:32,114 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2423 flow. Second operand 29 states and 3265 transitions. [2023-11-17 16:23:32,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 463 transitions, 5393 flow [2023-11-17 16:23:32,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 463 transitions, 5135 flow, removed 54 selfloop flow, removed 11 redundant places. [2023-11-17 16:23:32,223 INFO L231 Difference]: Finished difference. Result has 172 places, 280 transitions, 3580 flow [2023-11-17 16:23:32,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3580, PETRI_PLACES=172, PETRI_TRANSITIONS=280} [2023-11-17 16:23:32,224 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 143 predicate places. [2023-11-17 16:23:32,224 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 280 transitions, 3580 flow [2023-11-17 16:23:32,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 106.1) internal successors, (3183), 30 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:32,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:32,226 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] [2023-11-17 16:23:32,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:32,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 16:23:32,431 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)] === [2023-11-17 16:23:32,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 883560659, now seen corresponding path program 11 times [2023-11-17 16:23:32,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:32,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488360585] [2023-11-17 16:23:32,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:32,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:33,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:33,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488360585] [2023-11-17 16:23:33,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488360585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:33,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308144659] [2023-11-17 16:23:33,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:23:33,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:33,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:33,541 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:33,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:23:33,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:23:33,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:33,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:23:33,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:33,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:23:33,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:23:33,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:23:33,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:23:34,067 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-17 16:23:34,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 41 [2023-11-17 16:23:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:34,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:37,105 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:37,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 101 [2023-11-17 16:23:37,167 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:23:37,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2370 treesize of output 2274 [2023-11-17 16:23:37,190 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:23:37,244 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:37,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 423 treesize of output 409 [2023-11-17 16:23:37,265 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:23:37,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:37,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 373 treesize of output 384 [2023-11-17 16:23:37,388 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:23:37,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 399 treesize of output 335 [2023-11-17 16:23:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:40,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308144659] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:40,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:40,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:23:40,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163497435] [2023-11-17 16:23:40,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:40,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:23:40,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:40,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:23:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1020, Unknown=8, NotChecked=0, Total=1190 [2023-11-17 16:23:40,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 302 [2023-11-17 16:23:40,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 280 transitions, 3580 flow. Second operand has 35 states, 35 states have (on average 94.8) internal successors, (3318), 35 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:40,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:40,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 302 [2023-11-17 16:23:40,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:44,182 INFO L124 PetriNetUnfolderBase]: 1454/2890 cut-off events. [2023-11-17 16:23:44,182 INFO L125 PetriNetUnfolderBase]: For 32823/32823 co-relation queries the response was YES. [2023-11-17 16:23:44,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17994 conditions, 2890 events. 1454/2890 cut-off events. For 32823/32823 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 19816 event pairs, 270 based on Foata normal form. 5/2895 useless extension candidates. Maximal degree in co-relation 17767. Up to 880 conditions per place. [2023-11-17 16:23:44,207 INFO L140 encePairwiseOnDemand]: 290/302 looper letters, 292 selfloop transitions, 169 changer transitions 16/477 dead transitions. [2023-11-17 16:23:44,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 477 transitions, 6024 flow [2023-11-17 16:23:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:23:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:23:44,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2840 transitions. [2023-11-17 16:23:44,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3358561967833491 [2023-11-17 16:23:44,211 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2840 transitions. [2023-11-17 16:23:44,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2840 transitions. [2023-11-17 16:23:44,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:44,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2840 transitions. [2023-11-17 16:23:44,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 101.42857142857143) internal successors, (2840), 28 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 302.0) internal successors, (8758), 29 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,223 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 302.0) internal successors, (8758), 29 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,223 INFO L175 Difference]: Start difference. First operand has 172 places, 280 transitions, 3580 flow. Second operand 28 states and 2840 transitions. [2023-11-17 16:23:44,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 477 transitions, 6024 flow [2023-11-17 16:23:44,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 477 transitions, 5721 flow, removed 133 selfloop flow, removed 6 redundant places. [2023-11-17 16:23:44,404 INFO L231 Difference]: Finished difference. Result has 199 places, 320 transitions, 4331 flow [2023-11-17 16:23:44,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4331, PETRI_PLACES=199, PETRI_TRANSITIONS=320} [2023-11-17 16:23:44,405 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 170 predicate places. [2023-11-17 16:23:44,406 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 320 transitions, 4331 flow [2023-11-17 16:23:44,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.8) internal successors, (3318), 35 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:44,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:44,406 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] [2023-11-17 16:23:44,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 16:23:44,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:23:44,612 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)] === [2023-11-17 16:23:44,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1121990491, now seen corresponding path program 12 times [2023-11-17 16:23:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:44,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559311147] [2023-11-17 16:23:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:45,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:45,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559311147] [2023-11-17 16:23:45,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559311147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:45,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783987343] [2023-11-17 16:23:45,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:23:45,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:45,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:45,661 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:45,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:23:45,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 16:23:45,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:45,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:23:45,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:45,789 INFO L378 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 88 treesize of output 80 [2023-11-17 16:23:45,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-17 16:23:45,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-17 16:23:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:46,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:46,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783987343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:46,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:46,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 19 [2023-11-17 16:23:46,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52625700] [2023-11-17 16:23:46,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:46,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:23:46,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:23:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:23:46,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 302 [2023-11-17 16:23:46,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 320 transitions, 4331 flow. Second operand has 11 states, 11 states have (on average 110.81818181818181) internal successors, (1219), 11 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:46,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:46,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 302 [2023-11-17 16:23:46,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:46,703 INFO L124 PetriNetUnfolderBase]: 1409/2747 cut-off events. [2023-11-17 16:23:46,704 INFO L125 PetriNetUnfolderBase]: For 39728/39728 co-relation queries the response was YES. [2023-11-17 16:23:46,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18380 conditions, 2747 events. 1409/2747 cut-off events. For 39728/39728 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 18072 event pairs, 271 based on Foata normal form. 26/2773 useless extension candidates. Maximal degree in co-relation 18204. Up to 1852 conditions per place. [2023-11-17 16:23:46,730 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 253 selfloop transitions, 88 changer transitions 14/355 dead transitions. [2023-11-17 16:23:46,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 355 transitions, 5354 flow [2023-11-17 16:23:46,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:46,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1058 transitions. [2023-11-17 16:23:46,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38925680647534955 [2023-11-17 16:23:46,732 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1058 transitions. [2023-11-17 16:23:46,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1058 transitions. [2023-11-17 16:23:46,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:46,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1058 transitions. [2023-11-17 16:23:46,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 117.55555555555556) internal successors, (1058), 9 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:46,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:46,736 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:46,736 INFO L175 Difference]: Start difference. First operand has 199 places, 320 transitions, 4331 flow. Second operand 9 states and 1058 transitions. [2023-11-17 16:23:46,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 355 transitions, 5354 flow [2023-11-17 16:23:46,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 355 transitions, 5177 flow, removed 71 selfloop flow, removed 10 redundant places. [2023-11-17 16:23:46,904 INFO L231 Difference]: Finished difference. Result has 197 places, 315 transitions, 4374 flow [2023-11-17 16:23:46,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4374, PETRI_PLACES=197, PETRI_TRANSITIONS=315} [2023-11-17 16:23:46,905 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2023-11-17 16:23:46,905 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 315 transitions, 4374 flow [2023-11-17 16:23:46,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 110.81818181818181) internal successors, (1219), 11 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:46,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:46,906 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] [2023-11-17 16:23:46,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:47,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:23:47,106 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)] === [2023-11-17 16:23:47,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:47,107 INFO L85 PathProgramCache]: Analyzing trace with hash -704807587, now seen corresponding path program 13 times [2023-11-17 16:23:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481008030] [2023-11-17 16:23:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481008030] [2023-11-17 16:23:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481008030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157135070] [2023-11-17 16:23:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:23:48,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:48,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:48,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:23:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:48,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:23:48,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:48,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:48,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-17 16:23:48,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:48,863 INFO L378 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 31 treesize of output 24 [2023-11-17 16:23:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:49,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:49,480 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:23:49,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 166 treesize of output 169 [2023-11-17 16:23:49,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2023-11-17 16:23:49,540 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:49,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 69 [2023-11-17 16:23:50,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:50,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157135070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:50,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:50,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-11-17 16:23:50,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632226549] [2023-11-17 16:23:50,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:50,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 16:23:50,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:50,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 16:23:50,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1052, Unknown=2, NotChecked=0, Total=1190 [2023-11-17 16:23:50,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 302 [2023-11-17 16:23:50,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 315 transitions, 4374 flow. Second operand has 35 states, 35 states have (on average 94.8) internal successors, (3318), 35 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:50,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:50,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 302 [2023-11-17 16:23:50,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:53,928 INFO L124 PetriNetUnfolderBase]: 1420/2811 cut-off events. [2023-11-17 16:23:53,929 INFO L125 PetriNetUnfolderBase]: For 41963/41963 co-relation queries the response was YES. [2023-11-17 16:23:53,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18990 conditions, 2811 events. 1420/2811 cut-off events. For 41963/41963 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19067 event pairs, 240 based on Foata normal form. 1/2812 useless extension candidates. Maximal degree in co-relation 18805. Up to 933 conditions per place. [2023-11-17 16:23:53,957 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 287 selfloop transitions, 133 changer transitions 15/435 dead transitions. [2023-11-17 16:23:53,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 435 transitions, 6023 flow [2023-11-17 16:23:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:23:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:23:53,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2226 transitions. [2023-11-17 16:23:53,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3350391330523781 [2023-11-17 16:23:53,961 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2226 transitions. [2023-11-17 16:23:53,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2226 transitions. [2023-11-17 16:23:53,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:53,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2226 transitions. [2023-11-17 16:23:53,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 101.18181818181819) internal successors, (2226), 22 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:53,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 302.0) internal successors, (6946), 23 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:53,969 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 302.0) internal successors, (6946), 23 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:53,969 INFO L175 Difference]: Start difference. First operand has 197 places, 315 transitions, 4374 flow. Second operand 22 states and 2226 transitions. [2023-11-17 16:23:53,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 435 transitions, 6023 flow [2023-11-17 16:23:54,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 435 transitions, 5888 flow, removed 32 selfloop flow, removed 4 redundant places. [2023-11-17 16:23:54,257 INFO L231 Difference]: Finished difference. Result has 215 places, 317 transitions, 4561 flow [2023-11-17 16:23:54,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4561, PETRI_PLACES=215, PETRI_TRANSITIONS=317} [2023-11-17 16:23:54,258 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 186 predicate places. [2023-11-17 16:23:54,258 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 317 transitions, 4561 flow [2023-11-17 16:23:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.8) internal successors, (3318), 35 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:54,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:54,259 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] [2023-11-17 16:23:54,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:23:54,465 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:23:54,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:54,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2027874889, now seen corresponding path program 14 times [2023-11-17 16:23:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886785539] [2023-11-17 16:23:54,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:54,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:54,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:54,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886785539] [2023-11-17 16:23:54,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886785539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:54,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:23:54,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:23:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781640909] [2023-11-17 16:23:54,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:54,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:23:54,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:54,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:23:54,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:23:54,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 302 [2023-11-17 16:23:54,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 317 transitions, 4561 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:54,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:54,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 302 [2023-11-17 16:23:54,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:54,897 INFO L124 PetriNetUnfolderBase]: 1180/2345 cut-off events. [2023-11-17 16:23:54,897 INFO L125 PetriNetUnfolderBase]: For 41463/41463 co-relation queries the response was YES. [2023-11-17 16:23:54,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16384 conditions, 2345 events. 1180/2345 cut-off events. For 41463/41463 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15080 event pairs, 260 based on Foata normal form. 92/2437 useless extension candidates. Maximal degree in co-relation 16233. Up to 1002 conditions per place. [2023-11-17 16:23:54,917 INFO L140 encePairwiseOnDemand]: 298/302 looper letters, 180 selfloop transitions, 85 changer transitions 0/265 dead transitions. [2023-11-17 16:23:54,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 265 transitions, 4282 flow [2023-11-17 16:23:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:23:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:23:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 595 transitions. [2023-11-17 16:23:54,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925496688741722 [2023-11-17 16:23:54,919 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 595 transitions. [2023-11-17 16:23:54,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 595 transitions. [2023-11-17 16:23:54,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:54,919 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 595 transitions. [2023-11-17 16:23:54,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.75) internal successors, (595), 4 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:54,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:54,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 302.0) internal successors, (1510), 5 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:54,921 INFO L175 Difference]: Start difference. First operand has 215 places, 317 transitions, 4561 flow. Second operand 4 states and 595 transitions. [2023-11-17 16:23:54,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 265 transitions, 4282 flow [2023-11-17 16:23:55,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 265 transitions, 4111 flow, removed 33 selfloop flow, removed 15 redundant places. [2023-11-17 16:23:55,041 INFO L231 Difference]: Finished difference. Result has 186 places, 255 transitions, 3723 flow [2023-11-17 16:23:55,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3467, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=3723, PETRI_PLACES=186, PETRI_TRANSITIONS=255} [2023-11-17 16:23:55,041 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2023-11-17 16:23:55,042 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 255 transitions, 3723 flow [2023-11-17 16:23:55,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:55,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:55,042 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] [2023-11-17 16:23:55,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 16:23:55,042 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:23:55,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:55,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1675181561, now seen corresponding path program 15 times [2023-11-17 16:23:55,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:55,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204726044] [2023-11-17 16:23:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:55,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:56,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:56,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204726044] [2023-11-17 16:23:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204726044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060716643] [2023-11-17 16:23:56,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:23:56,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:56,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:56,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:56,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:23:56,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:23:56,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:56,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:23:56,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:56,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:23:56,640 INFO L378 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 22 treesize of output 17 [2023-11-17 16:23:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:23:56,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:23:56,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060716643] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:23:56,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:23:56,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-11-17 16:23:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197464113] [2023-11-17 16:23:56,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:23:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:23:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:23:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:23:56,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:23:56,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 255 transitions, 3723 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:56,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:56,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:23:56,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:23:57,312 INFO L124 PetriNetUnfolderBase]: 1196/2383 cut-off events. [2023-11-17 16:23:57,312 INFO L125 PetriNetUnfolderBase]: For 34655/34655 co-relation queries the response was YES. [2023-11-17 16:23:57,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2383 events. 1196/2383 cut-off events. For 34655/34655 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15398 event pairs, 310 based on Foata normal form. 2/2385 useless extension candidates. Maximal degree in co-relation 16152. Up to 1685 conditions per place. [2023-11-17 16:23:57,329 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 196 selfloop transitions, 75 changer transitions 16/287 dead transitions. [2023-11-17 16:23:57,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 287 transitions, 4579 flow [2023-11-17 16:23:57,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:23:57,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:23:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1075 transitions. [2023-11-17 16:23:57,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39551140544518026 [2023-11-17 16:23:57,330 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1075 transitions. [2023-11-17 16:23:57,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1075 transitions. [2023-11-17 16:23:57,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:23:57,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1075 transitions. [2023-11-17 16:23:57,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.44444444444444) internal successors, (1075), 9 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:57,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:57,334 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:57,334 INFO L175 Difference]: Start difference. First operand has 186 places, 255 transitions, 3723 flow. Second operand 9 states and 1075 transitions. [2023-11-17 16:23:57,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 287 transitions, 4579 flow [2023-11-17 16:23:57,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 287 transitions, 4425 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-11-17 16:23:57,440 INFO L231 Difference]: Finished difference. Result has 195 places, 257 transitions, 3814 flow [2023-11-17 16:23:57,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3581, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3814, PETRI_PLACES=195, PETRI_TRANSITIONS=257} [2023-11-17 16:23:57,441 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 166 predicate places. [2023-11-17 16:23:57,441 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 257 transitions, 3814 flow [2023-11-17 16:23:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:57,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:23:57,441 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] [2023-11-17 16:23:57,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:23:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:57,647 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:23:57,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:23:57,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1229554221, now seen corresponding path program 16 times [2023-11-17 16:23:57,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:23:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629682347] [2023-11-17 16:23:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:23:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:23:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:23:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:58,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:23:58,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629682347] [2023-11-17 16:23:58,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629682347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:23:58,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464636060] [2023-11-17 16:23:58,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:23:58,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:58,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:23:58,827 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:23:58,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:23:58,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:23:58,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:23:58,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:23:58,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:23:58,940 INFO L378 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 120 treesize of output 116 [2023-11-17 16:23:59,183 INFO L378 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 36 treesize of output 29 [2023-11-17 16:23:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:59,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:23:59,582 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:59,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 87 [2023-11-17 16:23:59,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:23:59,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-11-17 16:23:59,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:23:59,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464636060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:23:59,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:23:59,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-11-17 16:23:59,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213240532] [2023-11-17 16:23:59,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:23:59,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:23:59,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:23:59,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:23:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=944, Unknown=1, NotChecked=0, Total=1056 [2023-11-17 16:23:59,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 302 [2023-11-17 16:23:59,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 257 transitions, 3814 flow. Second operand has 33 states, 33 states have (on average 94.9090909090909) internal successors, (3132), 33 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:23:59,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:23:59,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 302 [2023-11-17 16:23:59,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:02,426 INFO L124 PetriNetUnfolderBase]: 1220/2453 cut-off events. [2023-11-17 16:24:02,427 INFO L125 PetriNetUnfolderBase]: For 35039/35039 co-relation queries the response was YES. [2023-11-17 16:24:02,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17057 conditions, 2453 events. 1220/2453 cut-off events. For 35039/35039 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16328 event pairs, 267 based on Foata normal form. 2/2455 useless extension candidates. Maximal degree in co-relation 16904. Up to 1024 conditions per place. [2023-11-17 16:24:02,446 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 225 selfloop transitions, 127 changer transitions 36/388 dead transitions. [2023-11-17 16:24:02,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 388 transitions, 5575 flow [2023-11-17 16:24:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:24:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:24:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2801 transitions. [2023-11-17 16:24:02,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33124408703878905 [2023-11-17 16:24:02,450 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2801 transitions. [2023-11-17 16:24:02,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2801 transitions. [2023-11-17 16:24:02,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:02,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2801 transitions. [2023-11-17 16:24:02,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 100.03571428571429) internal successors, (2801), 28 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:02,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 302.0) internal successors, (8758), 29 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:02,461 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 302.0) internal successors, (8758), 29 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:02,461 INFO L175 Difference]: Start difference. First operand has 195 places, 257 transitions, 3814 flow. Second operand 28 states and 2801 transitions. [2023-11-17 16:24:02,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 388 transitions, 5575 flow [2023-11-17 16:24:02,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 388 transitions, 5441 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-11-17 16:24:02,566 INFO L231 Difference]: Finished difference. Result has 225 places, 268 transitions, 4160 flow [2023-11-17 16:24:02,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=4160, PETRI_PLACES=225, PETRI_TRANSITIONS=268} [2023-11-17 16:24:02,567 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 196 predicate places. [2023-11-17 16:24:02,567 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 268 transitions, 4160 flow [2023-11-17 16:24:02,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 94.9090909090909) internal successors, (3132), 33 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:02,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:02,567 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] [2023-11-17 16:24:02,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:02,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:24:02,768 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:02,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -479146906, now seen corresponding path program 1 times [2023-11-17 16:24:02,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:02,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675241438] [2023-11-17 16:24:02,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:02,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:02,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:02,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675241438] [2023-11-17 16:24:02,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675241438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:02,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:24:02,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:24:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732542710] [2023-11-17 16:24:02,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:02,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:24:02,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:24:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:24:02,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 302 [2023-11-17 16:24:02,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 268 transitions, 4160 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:02,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:02,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 302 [2023-11-17 16:24:02,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:03,328 INFO L124 PetriNetUnfolderBase]: 1220/2387 cut-off events. [2023-11-17 16:24:03,328 INFO L125 PetriNetUnfolderBase]: For 35772/35772 co-relation queries the response was YES. [2023-11-17 16:24:03,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17354 conditions, 2387 events. 1220/2387 cut-off events. For 35772/35772 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15254 event pairs, 199 based on Foata normal form. 80/2467 useless extension candidates. Maximal degree in co-relation 17275. Up to 1629 conditions per place. [2023-11-17 16:24:03,347 INFO L140 encePairwiseOnDemand]: 296/302 looper letters, 226 selfloop transitions, 100 changer transitions 0/326 dead transitions. [2023-11-17 16:24:03,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 326 transitions, 5479 flow [2023-11-17 16:24:03,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:24:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:24:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 850 transitions. [2023-11-17 16:24:03,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46909492273730685 [2023-11-17 16:24:03,348 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 850 transitions. [2023-11-17 16:24:03,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 850 transitions. [2023-11-17 16:24:03,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:03,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 850 transitions. [2023-11-17 16:24:03,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.66666666666666) internal successors, (850), 6 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,350 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 302.0) internal successors, (2114), 7 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,350 INFO L175 Difference]: Start difference. First operand has 225 places, 268 transitions, 4160 flow. Second operand 6 states and 850 transitions. [2023-11-17 16:24:03,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 326 transitions, 5479 flow [2023-11-17 16:24:03,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 326 transitions, 5362 flow, removed 17 selfloop flow, removed 14 redundant places. [2023-11-17 16:24:03,459 INFO L231 Difference]: Finished difference. Result has 214 places, 277 transitions, 4569 flow [2023-11-17 16:24:03,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4569, PETRI_PLACES=214, PETRI_TRANSITIONS=277} [2023-11-17 16:24:03,460 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 185 predicate places. [2023-11-17 16:24:03,460 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 277 transitions, 4569 flow [2023-11-17 16:24:03,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:03,460 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] [2023-11-17 16:24:03,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 16:24:03,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:03,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:03,461 INFO L85 PathProgramCache]: Analyzing trace with hash -832564492, now seen corresponding path program 2 times [2023-11-17 16:24:03,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:03,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385784999] [2023-11-17 16:24:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:03,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:03,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385784999] [2023-11-17 16:24:03,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385784999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:03,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:24:03,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:24:03,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704455368] [2023-11-17 16:24:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:03,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:24:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:24:03,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:24:03,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 302 [2023-11-17 16:24:03,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 277 transitions, 4569 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:03,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 302 [2023-11-17 16:24:03,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:03,961 INFO L124 PetriNetUnfolderBase]: 986/1996 cut-off events. [2023-11-17 16:24:03,961 INFO L125 PetriNetUnfolderBase]: For 38407/38407 co-relation queries the response was YES. [2023-11-17 16:24:03,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15560 conditions, 1996 events. 986/1996 cut-off events. For 38407/38407 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12754 event pairs, 267 based on Foata normal form. 130/2126 useless extension candidates. Maximal degree in co-relation 15370. Up to 1197 conditions per place. [2023-11-17 16:24:03,977 INFO L140 encePairwiseOnDemand]: 296/302 looper letters, 195 selfloop transitions, 63 changer transitions 24/282 dead transitions. [2023-11-17 16:24:03,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 282 transitions, 4927 flow [2023-11-17 16:24:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:24:03,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:24:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-11-17 16:24:03,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695364238410596 [2023-11-17 16:24:03,979 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-11-17 16:24:03,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-11-17 16:24:03,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:03,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-11-17 16:24:03,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:03,982 INFO L175 Difference]: Start difference. First operand has 214 places, 277 transitions, 4569 flow. Second operand 5 states and 709 transitions. [2023-11-17 16:24:03,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 282 transitions, 4927 flow [2023-11-17 16:24:04,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 282 transitions, 4730 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-11-17 16:24:04,110 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 3783 flow [2023-11-17 16:24:04,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3783, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2023-11-17 16:24:04,111 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 180 predicate places. [2023-11-17 16:24:04,111 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 3783 flow [2023-11-17 16:24:04,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:04,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:04,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:04,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-17 16:24:04,112 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:04,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:04,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1485642019, now seen corresponding path program 17 times [2023-11-17 16:24:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:04,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998164629] [2023-11-17 16:24:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:07,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998164629] [2023-11-17 16:24:07,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998164629] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:07,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437687226] [2023-11-17 16:24:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:24:07,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:07,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:07,740 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:07,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:24:07,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:24:07,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:07,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:24:07,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:08,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:24:08,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:08,180 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:08,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-17 16:24:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:08,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437687226] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:08,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:24:08,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12, 8] total 25 [2023-11-17 16:24:08,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980237670] [2023-11-17 16:24:08,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:08,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 16:24:08,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:08,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 16:24:08,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2023-11-17 16:24:08,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 302 [2023-11-17 16:24:08,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 3783 flow. Second operand has 8 states, 8 states have (on average 123.5) internal successors, (988), 8 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:08,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:08,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 302 [2023-11-17 16:24:08,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:08,897 INFO L124 PetriNetUnfolderBase]: 957/1900 cut-off events. [2023-11-17 16:24:08,897 INFO L125 PetriNetUnfolderBase]: For 34729/34729 co-relation queries the response was YES. [2023-11-17 16:24:08,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14901 conditions, 1900 events. 957/1900 cut-off events. For 34729/34729 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11659 event pairs, 203 based on Foata normal form. 1/1901 useless extension candidates. Maximal degree in co-relation 14651. Up to 1213 conditions per place. [2023-11-17 16:24:08,910 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 175 selfloop transitions, 86 changer transitions 14/275 dead transitions. [2023-11-17 16:24:08,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 275 transitions, 4767 flow [2023-11-17 16:24:08,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 16:24:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 16:24:08,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1042 transitions. [2023-11-17 16:24:08,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43129139072847683 [2023-11-17 16:24:08,911 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1042 transitions. [2023-11-17 16:24:08,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1042 transitions. [2023-11-17 16:24:08,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:08,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1042 transitions. [2023-11-17 16:24:08,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 130.25) internal successors, (1042), 8 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:08,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 302.0) internal successors, (2718), 9 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:08,914 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 302.0) internal successors, (2718), 9 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:08,914 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 3783 flow. Second operand 8 states and 1042 transitions. [2023-11-17 16:24:08,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 275 transitions, 4767 flow [2023-11-17 16:24:09,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 275 transitions, 4609 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-11-17 16:24:09,014 INFO L231 Difference]: Finished difference. Result has 207 places, 241 transitions, 3995 flow [2023-11-17 16:24:09,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3651, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3995, PETRI_PLACES=207, PETRI_TRANSITIONS=241} [2023-11-17 16:24:09,015 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2023-11-17 16:24:09,015 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 241 transitions, 3995 flow [2023-11-17 16:24:09,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 123.5) internal successors, (988), 8 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:09,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:09,015 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:09,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:09,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:09,216 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:09,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:09,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1846884595, now seen corresponding path program 18 times [2023-11-17 16:24:09,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:09,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661589152] [2023-11-17 16:24:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:09,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:10,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661589152] [2023-11-17 16:24:10,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661589152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:10,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746003521] [2023-11-17 16:24:10,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:24:10,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:10,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:10,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:10,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:24:10,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-11-17 16:24:10,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:10,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:24:10,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:10,620 INFO L378 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 96 treesize of output 94 [2023-11-17 16:24:10,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-17 16:24:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:10,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:24:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746003521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:10,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:24:10,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-11-17 16:24:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952566327] [2023-11-17 16:24:10,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:24:10,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:24:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:24:10,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:24:10,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 241 transitions, 3995 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:10,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:10,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:24:10,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:11,390 INFO L124 PetriNetUnfolderBase]: 956/1906 cut-off events. [2023-11-17 16:24:11,390 INFO L125 PetriNetUnfolderBase]: For 34211/34211 co-relation queries the response was YES. [2023-11-17 16:24:11,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14785 conditions, 1906 events. 956/1906 cut-off events. For 34211/34211 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11740 event pairs, 210 based on Foata normal form. 1/1907 useless extension candidates. Maximal degree in co-relation 14663. Up to 1410 conditions per place. [2023-11-17 16:24:11,412 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 187 selfloop transitions, 69 changer transitions 14/270 dead transitions. [2023-11-17 16:24:11,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 270 transitions, 4769 flow [2023-11-17 16:24:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:24:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:24:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1079 transitions. [2023-11-17 16:24:11,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969830757910228 [2023-11-17 16:24:11,413 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1079 transitions. [2023-11-17 16:24:11,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1079 transitions. [2023-11-17 16:24:11,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:11,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1079 transitions. [2023-11-17 16:24:11,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:11,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:11,416 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:11,416 INFO L175 Difference]: Start difference. First operand has 207 places, 241 transitions, 3995 flow. Second operand 9 states and 1079 transitions. [2023-11-17 16:24:11,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 270 transitions, 4769 flow [2023-11-17 16:24:11,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 270 transitions, 4630 flow, removed 24 selfloop flow, removed 4 redundant places. [2023-11-17 16:24:11,523 INFO L231 Difference]: Finished difference. Result has 212 places, 240 transitions, 3986 flow [2023-11-17 16:24:11,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3856, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3986, PETRI_PLACES=212, PETRI_TRANSITIONS=240} [2023-11-17 16:24:11,524 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 183 predicate places. [2023-11-17 16:24:11,524 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 240 transitions, 3986 flow [2023-11-17 16:24:11,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:11,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:11,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:11,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:11,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:11,725 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:11,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1538438651, now seen corresponding path program 19 times [2023-11-17 16:24:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:11,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853762527] [2023-11-17 16:24:11,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:11,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:12,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:12,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:12,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853762527] [2023-11-17 16:24:12,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853762527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:12,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116422255] [2023-11-17 16:24:12,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:24:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:12,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:12,752 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:12,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:24:12,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:12,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:24:12,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:13,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:13,063 INFO L378 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 36 treesize of output 29 [2023-11-17 16:24:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:24:13,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:13,207 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_776 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_776) c_~queue~0.base)) (.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296)))) is different from false [2023-11-17 16:24:13,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:13,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 89 [2023-11-17 16:24:13,297 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:13,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 7 [2023-11-17 16:24:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:13,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116422255] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:13,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:24:13,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 10] total 29 [2023-11-17 16:24:13,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009692908] [2023-11-17 16:24:13,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:24:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:24:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=780, Unknown=1, NotChecked=56, Total=930 [2023-11-17 16:24:13,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:24:13,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 240 transitions, 3986 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:13,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:13,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:24:13,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:13,993 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_776 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_776) c_~queue~0.base)) (.cse2 (* c_~start~0 4))) (= (mod (select .cse1 (+ .cse2 c_~queue~0.offset 4)) 4294967296) (mod (select .cse1 (+ .cse2 c_~queue~0.offset)) 4294967296)))))) (and (or (not (= (mod (select (select |c_#memory_int| c_~queue~0.base) (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod |c_thread2Thread1of1ForFork2_~x~1#1| 4294967296))) .cse0) .cse0)) is different from false [2023-11-17 16:24:14,382 INFO L124 PetriNetUnfolderBase]: 967/1933 cut-off events. [2023-11-17 16:24:14,382 INFO L125 PetriNetUnfolderBase]: For 34689/34689 co-relation queries the response was YES. [2023-11-17 16:24:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15011 conditions, 1933 events. 967/1933 cut-off events. For 34689/34689 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11983 event pairs, 211 based on Foata normal form. 1/1934 useless extension candidates. Maximal degree in co-relation 14888. Up to 1190 conditions per place. [2023-11-17 16:24:14,398 INFO L140 encePairwiseOnDemand]: 286/302 looper letters, 170 selfloop transitions, 94 changer transitions 23/287 dead transitions. [2023-11-17 16:24:14,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 287 transitions, 5027 flow [2023-11-17 16:24:14,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:24:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:24:14,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1197 transitions. [2023-11-17 16:24:14,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963576158940397 [2023-11-17 16:24:14,400 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1197 transitions. [2023-11-17 16:24:14,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1197 transitions. [2023-11-17 16:24:14,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:14,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1197 transitions. [2023-11-17 16:24:14,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 119.7) internal successors, (1197), 10 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:14,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 302.0) internal successors, (3322), 11 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:14,403 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 302.0) internal successors, (3322), 11 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:14,403 INFO L175 Difference]: Start difference. First operand has 212 places, 240 transitions, 3986 flow. Second operand 10 states and 1197 transitions. [2023-11-17 16:24:14,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 287 transitions, 5027 flow [2023-11-17 16:24:14,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 287 transitions, 4880 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-11-17 16:24:14,519 INFO L231 Difference]: Finished difference. Result has 216 places, 240 transitions, 4102 flow [2023-11-17 16:24:14,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4102, PETRI_PLACES=216, PETRI_TRANSITIONS=240} [2023-11-17 16:24:14,520 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 187 predicate places. [2023-11-17 16:24:14,520 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 240 transitions, 4102 flow [2023-11-17 16:24:14,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:14,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:14,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:14,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:14,721 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 233156979, now seen corresponding path program 20 times [2023-11-17 16:24:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467464273] [2023-11-17 16:24:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:14,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:18,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467464273] [2023-11-17 16:24:18,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467464273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:18,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347030857] [2023-11-17 16:24:18,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:24:18,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:18,701 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:18,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:24:18,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 16:24:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:18,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:24:18,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:24:19,000 INFO L378 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 22 treesize of output 17 [2023-11-17 16:24:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:19,110 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:24:19,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347030857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:19,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:24:19,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-11-17 16:24:19,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510609123] [2023-11-17 16:24:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:19,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:24:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:24:19,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:24:19,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:24:19,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 240 transitions, 4102 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:19,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:24:19,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:19,674 INFO L124 PetriNetUnfolderBase]: 956/1910 cut-off events. [2023-11-17 16:24:19,674 INFO L125 PetriNetUnfolderBase]: For 35630/35630 co-relation queries the response was YES. [2023-11-17 16:24:19,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15548 conditions, 1910 events. 956/1910 cut-off events. For 35630/35630 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11772 event pairs, 214 based on Foata normal form. 1/1911 useless extension candidates. Maximal degree in co-relation 15423. Up to 1205 conditions per place. [2023-11-17 16:24:19,690 INFO L140 encePairwiseOnDemand]: 292/302 looper letters, 176 selfloop transitions, 74 changer transitions 20/270 dead transitions. [2023-11-17 16:24:19,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 270 transitions, 4942 flow [2023-11-17 16:24:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:24:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:24:19,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1079 transitions. [2023-11-17 16:24:19,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969830757910228 [2023-11-17 16:24:19,692 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1079 transitions. [2023-11-17 16:24:19,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1079 transitions. [2023-11-17 16:24:19,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:19,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1079 transitions. [2023-11-17 16:24:19,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.88888888888889) internal successors, (1079), 9 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,695 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,695 INFO L175 Difference]: Start difference. First operand has 216 places, 240 transitions, 4102 flow. Second operand 9 states and 1079 transitions. [2023-11-17 16:24:19,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 270 transitions, 4942 flow [2023-11-17 16:24:19,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 270 transitions, 4663 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-11-17 16:24:19,820 INFO L231 Difference]: Finished difference. Result has 213 places, 235 transitions, 3912 flow [2023-11-17 16:24:19,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3883, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3912, PETRI_PLACES=213, PETRI_TRANSITIONS=235} [2023-11-17 16:24:19,820 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 184 predicate places. [2023-11-17 16:24:19,820 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 235 transitions, 3912 flow [2023-11-17 16:24:19,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:19,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:19,821 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] [2023-11-17 16:24:19,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:20,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:20,021 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:20,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:20,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1053136884, now seen corresponding path program 3 times [2023-11-17 16:24:20,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:20,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072363262] [2023-11-17 16:24:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:20,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:20,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:20,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072363262] [2023-11-17 16:24:20,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072363262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:20,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:24:20,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:24:20,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206984167] [2023-11-17 16:24:20,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:20,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:24:20,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:20,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:24:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:24:20,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 302 [2023-11-17 16:24:20,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 235 transitions, 3912 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:20,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 302 [2023-11-17 16:24:20,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:20,437 INFO L124 PetriNetUnfolderBase]: 911/1743 cut-off events. [2023-11-17 16:24:20,437 INFO L125 PetriNetUnfolderBase]: For 31239/31239 co-relation queries the response was YES. [2023-11-17 16:24:20,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13604 conditions, 1743 events. 911/1743 cut-off events. For 31239/31239 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10082 event pairs, 250 based on Foata normal form. 30/1773 useless extension candidates. Maximal degree in co-relation 13499. Up to 1396 conditions per place. [2023-11-17 16:24:20,450 INFO L140 encePairwiseOnDemand]: 296/302 looper letters, 173 selfloop transitions, 71 changer transitions 3/247 dead transitions. [2023-11-17 16:24:20,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 247 transitions, 4482 flow [2023-11-17 16:24:20,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:24:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:24:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 700 transitions. [2023-11-17 16:24:20,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46357615894039733 [2023-11-17 16:24:20,451 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 700 transitions. [2023-11-17 16:24:20,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 700 transitions. [2023-11-17 16:24:20,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:20,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 700 transitions. [2023-11-17 16:24:20,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.0) internal successors, (700), 5 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,453 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,453 INFO L175 Difference]: Start difference. First operand has 213 places, 235 transitions, 3912 flow. Second operand 5 states and 700 transitions. [2023-11-17 16:24:20,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 247 transitions, 4482 flow [2023-11-17 16:24:20,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 247 transitions, 4165 flow, removed 20 selfloop flow, removed 17 redundant places. [2023-11-17 16:24:20,533 INFO L231 Difference]: Finished difference. Result has 193 places, 223 transitions, 3556 flow [2023-11-17 16:24:20,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3339, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3556, PETRI_PLACES=193, PETRI_TRANSITIONS=223} [2023-11-17 16:24:20,534 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2023-11-17 16:24:20,534 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 223 transitions, 3556 flow [2023-11-17 16:24:20,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:20,534 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] [2023-11-17 16:24:20,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-17 16:24:20,534 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:20,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash 178979888, now seen corresponding path program 1 times [2023-11-17 16:24:20,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:20,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408525061] [2023-11-17 16:24:20,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:20,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:20,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408525061] [2023-11-17 16:24:20,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408525061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:20,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:24:20,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:24:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109094756] [2023-11-17 16:24:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:24:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:24:20,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:24:20,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 302 [2023-11-17 16:24:20,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 223 transitions, 3556 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:20,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 302 [2023-11-17 16:24:20,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:20,960 INFO L124 PetriNetUnfolderBase]: 847/1641 cut-off events. [2023-11-17 16:24:20,960 INFO L125 PetriNetUnfolderBase]: For 25237/25237 co-relation queries the response was YES. [2023-11-17 16:24:20,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12364 conditions, 1641 events. 847/1641 cut-off events. For 25237/25237 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9504 event pairs, 241 based on Foata normal form. 18/1659 useless extension candidates. Maximal degree in co-relation 11863. Up to 1294 conditions per place. [2023-11-17 16:24:20,974 INFO L140 encePairwiseOnDemand]: 296/302 looper letters, 157 selfloop transitions, 60 changer transitions 8/225 dead transitions. [2023-11-17 16:24:20,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 225 transitions, 3913 flow [2023-11-17 16:24:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:24:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:24:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 697 transitions. [2023-11-17 16:24:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46158940397350995 [2023-11-17 16:24:20,975 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 697 transitions. [2023-11-17 16:24:20,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 697 transitions. [2023-11-17 16:24:20,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:20,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 697 transitions. [2023-11-17 16:24:20,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.4) internal successors, (697), 5 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,977 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:20,977 INFO L175 Difference]: Start difference. First operand has 193 places, 223 transitions, 3556 flow. Second operand 5 states and 697 transitions. [2023-11-17 16:24:20,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 225 transitions, 3913 flow [2023-11-17 16:24:21,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 225 transitions, 3733 flow, removed 15 selfloop flow, removed 7 redundant places. [2023-11-17 16:24:21,046 INFO L231 Difference]: Finished difference. Result has 188 places, 205 transitions, 3127 flow [2023-11-17 16:24:21,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3127, PETRI_PLACES=188, PETRI_TRANSITIONS=205} [2023-11-17 16:24:21,046 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2023-11-17 16:24:21,046 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 205 transitions, 3127 flow [2023-11-17 16:24:21,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:21,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:21,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-17 16:24:21,047 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:21,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 830494567, now seen corresponding path program 21 times [2023-11-17 16:24:21,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:21,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688581303] [2023-11-17 16:24:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:21,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:21,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:21,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688581303] [2023-11-17 16:24:21,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688581303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:21,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252872928] [2023-11-17 16:24:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:24:21,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:21,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:21,941 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:21,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:24:22,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 16:24:22,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:22,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:24:22,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:22,082 INFO L378 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 130 treesize of output 126 [2023-11-17 16:24:22,231 INFO L378 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 36 treesize of output 29 [2023-11-17 16:24:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:22,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:24:22,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252872928] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:22,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:24:22,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 19 [2023-11-17 16:24:22,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989466991] [2023-11-17 16:24:22,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:22,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:24:22,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:22,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:24:22,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:24:22,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 302 [2023-11-17 16:24:22,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 205 transitions, 3127 flow. Second operand has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:22,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:22,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 302 [2023-11-17 16:24:22,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:22,684 INFO L124 PetriNetUnfolderBase]: 844/1634 cut-off events. [2023-11-17 16:24:22,684 INFO L125 PetriNetUnfolderBase]: For 23593/23593 co-relation queries the response was YES. [2023-11-17 16:24:22,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11975 conditions, 1634 events. 844/1634 cut-off events. For 23593/23593 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9395 event pairs, 196 based on Foata normal form. 1/1635 useless extension candidates. Maximal degree in co-relation 11680. Up to 1129 conditions per place. [2023-11-17 16:24:22,696 INFO L140 encePairwiseOnDemand]: 292/302 looper letters, 159 selfloop transitions, 57 changer transitions 16/232 dead transitions. [2023-11-17 16:24:22,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 3788 flow [2023-11-17 16:24:22,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 16:24:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 16:24:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1075 transitions. [2023-11-17 16:24:22,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39551140544518026 [2023-11-17 16:24:22,698 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1075 transitions. [2023-11-17 16:24:22,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1075 transitions. [2023-11-17 16:24:22,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:22,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1075 transitions. [2023-11-17 16:24:22,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 119.44444444444444) internal successors, (1075), 9 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:22,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:22,700 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 302.0) internal successors, (3020), 10 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:22,700 INFO L175 Difference]: Start difference. First operand has 188 places, 205 transitions, 3127 flow. Second operand 9 states and 1075 transitions. [2023-11-17 16:24:22,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 3788 flow [2023-11-17 16:24:22,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 232 transitions, 3617 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-11-17 16:24:22,763 INFO L231 Difference]: Finished difference. Result has 187 places, 202 transitions, 3023 flow [2023-11-17 16:24:22,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2960, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3023, PETRI_PLACES=187, PETRI_TRANSITIONS=202} [2023-11-17 16:24:22,763 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2023-11-17 16:24:22,763 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 202 transitions, 3023 flow [2023-11-17 16:24:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 114.0) internal successors, (1140), 10 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:22,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:22,764 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:24:22,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:22,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:24:22,964 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:22,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2084979749, now seen corresponding path program 22 times [2023-11-17 16:24:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:22,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323587236] [2023-11-17 16:24:22,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:22,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323587236] [2023-11-17 16:24:24,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323587236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599459393] [2023-11-17 16:24:24,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:24:24,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:24,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:24,124 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:24,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 16:24:24,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:24:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:24,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 16:24:24,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:24,246 INFO L378 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 108 treesize of output 100 [2023-11-17 16:24:24,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-17 16:24:24,494 INFO L378 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 36 treesize of output 29 [2023-11-17 16:24:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:24,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:24,902 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:24,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 170 [2023-11-17 16:24:24,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 71 [2023-11-17 16:24:24,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:24,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 69 [2023-11-17 16:24:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:24:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599459393] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:24:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 10] total 29 [2023-11-17 16:24:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49194682] [2023-11-17 16:24:25,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:25,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:24:25,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:24:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=830, Unknown=8, NotChecked=0, Total=930 [2023-11-17 16:24:25,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 302 [2023-11-17 16:24:25,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 202 transitions, 3023 flow. Second operand has 11 states, 11 states have (on average 110.81818181818181) internal successors, (1219), 11 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:25,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:25,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 302 [2023-11-17 16:24:25,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:26,256 INFO L124 PetriNetUnfolderBase]: 837/1619 cut-off events. [2023-11-17 16:24:26,256 INFO L125 PetriNetUnfolderBase]: For 22072/22072 co-relation queries the response was YES. [2023-11-17 16:24:26,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11673 conditions, 1619 events. 837/1619 cut-off events. For 22072/22072 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9220 event pairs, 152 based on Foata normal form. 1/1620 useless extension candidates. Maximal degree in co-relation 11577. Up to 845 conditions per place. [2023-11-17 16:24:26,269 INFO L140 encePairwiseOnDemand]: 291/302 looper letters, 144 selfloop transitions, 72 changer transitions 46/262 dead transitions. [2023-11-17 16:24:26,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 262 transitions, 4027 flow [2023-11-17 16:24:26,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:24:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:24:26,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1506 transitions. [2023-11-17 16:24:26,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835965359144167 [2023-11-17 16:24:26,271 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1506 transitions. [2023-11-17 16:24:26,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1506 transitions. [2023-11-17 16:24:26,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:26,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1506 transitions. [2023-11-17 16:24:26,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.84615384615384) internal successors, (1506), 13 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 302.0) internal successors, (4228), 14 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,276 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 302.0) internal successors, (4228), 14 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,276 INFO L175 Difference]: Start difference. First operand has 187 places, 202 transitions, 3023 flow. Second operand 13 states and 1506 transitions. [2023-11-17 16:24:26,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 262 transitions, 4027 flow [2023-11-17 16:24:26,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 262 transitions, 3861 flow, removed 20 selfloop flow, removed 11 redundant places. [2023-11-17 16:24:26,362 INFO L231 Difference]: Finished difference. Result has 191 places, 192 transitions, 2882 flow [2023-11-17 16:24:26,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2881, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2882, PETRI_PLACES=191, PETRI_TRANSITIONS=192} [2023-11-17 16:24:26,363 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2023-11-17 16:24:26,363 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 192 transitions, 2882 flow [2023-11-17 16:24:26,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 110.81818181818181) internal successors, (1219), 11 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:26,363 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] [2023-11-17 16:24:26,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:26,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 16:24:26,568 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:26,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:26,568 INFO L85 PathProgramCache]: Analyzing trace with hash 901947970, now seen corresponding path program 2 times [2023-11-17 16:24:26,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:26,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997467441] [2023-11-17 16:24:26,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:26,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:26,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:24:26,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:26,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997467441] [2023-11-17 16:24:26,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997467441] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:24:26,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:24:26,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:24:26,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809089741] [2023-11-17 16:24:26,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:24:26,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:24:26,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:26,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:24:26,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:24:26,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 302 [2023-11-17 16:24:26,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 192 transitions, 2882 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:26,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 302 [2023-11-17 16:24:26,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:26,866 INFO L124 PetriNetUnfolderBase]: 696/1310 cut-off events. [2023-11-17 16:24:26,866 INFO L125 PetriNetUnfolderBase]: For 18839/18839 co-relation queries the response was YES. [2023-11-17 16:24:26,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9579 conditions, 1310 events. 696/1310 cut-off events. For 18839/18839 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6792 event pairs, 204 based on Foata normal form. 36/1346 useless extension candidates. Maximal degree in co-relation 9496. Up to 993 conditions per place. [2023-11-17 16:24:26,876 INFO L140 encePairwiseOnDemand]: 296/302 looper letters, 135 selfloop transitions, 36 changer transitions 20/191 dead transitions. [2023-11-17 16:24:26,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 191 transitions, 3054 flow [2023-11-17 16:24:26,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:24:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:24:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2023-11-17 16:24:26,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46622516556291393 [2023-11-17 16:24:26,877 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2023-11-17 16:24:26,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2023-11-17 16:24:26,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:26,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2023-11-17 16:24:26,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,879 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 302.0) internal successors, (1812), 6 states have internal predecessors, (1812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,879 INFO L175 Difference]: Start difference. First operand has 191 places, 192 transitions, 2882 flow. Second operand 5 states and 704 transitions. [2023-11-17 16:24:26,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 191 transitions, 3054 flow [2023-11-17 16:24:26,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 191 transitions, 2724 flow, removed 55 selfloop flow, removed 24 redundant places. [2023-11-17 16:24:26,923 INFO L231 Difference]: Finished difference. Result has 154 places, 154 transitions, 2009 flow [2023-11-17 16:24:26,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2009, PETRI_PLACES=154, PETRI_TRANSITIONS=154} [2023-11-17 16:24:26,924 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2023-11-17 16:24:26,924 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 154 transitions, 2009 flow [2023-11-17 16:24:26,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:26,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:26,925 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] [2023-11-17 16:24:26,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-17 16:24:26,925 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:26,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:26,925 INFO L85 PathProgramCache]: Analyzing trace with hash -477930521, now seen corresponding path program 1 times [2023-11-17 16:24:26,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:26,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078156163] [2023-11-17 16:24:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:26,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:27,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:27,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:27,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078156163] [2023-11-17 16:24:27,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078156163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:27,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888959460] [2023-11-17 16:24:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:27,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:27,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:27,673 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:27,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 16:24:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:27,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:24:27,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:28,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:28,308 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:28,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 60 [2023-11-17 16:24:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:29,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888959460] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:29,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:29,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-11-17 16:24:29,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098935654] [2023-11-17 16:24:29,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:29,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:24:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:24:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 16:24:29,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 302 [2023-11-17 16:24:29,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 154 transitions, 2009 flow. Second operand has 36 states, 36 states have (on average 103.91666666666667) internal successors, (3741), 36 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:29,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:29,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 302 [2023-11-17 16:24:29,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:33,239 INFO L124 PetriNetUnfolderBase]: 1213/2179 cut-off events. [2023-11-17 16:24:33,239 INFO L125 PetriNetUnfolderBase]: For 23150/23150 co-relation queries the response was YES. [2023-11-17 16:24:33,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14162 conditions, 2179 events. 1213/2179 cut-off events. For 23150/23150 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12162 event pairs, 148 based on Foata normal form. 3/2182 useless extension candidates. Maximal degree in co-relation 14114. Up to 483 conditions per place. [2023-11-17 16:24:33,258 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 247 selfloop transitions, 187 changer transitions 39/473 dead transitions. [2023-11-17 16:24:33,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 473 transitions, 5878 flow [2023-11-17 16:24:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:24:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:24:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4497 transitions. [2023-11-17 16:24:33,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36318849943466325 [2023-11-17 16:24:33,268 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4497 transitions. [2023-11-17 16:24:33,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4497 transitions. [2023-11-17 16:24:33,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:33,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4497 transitions. [2023-11-17 16:24:33,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 109.6829268292683) internal successors, (4497), 41 states have internal predecessors, (4497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:33,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 302.0) internal successors, (12684), 42 states have internal predecessors, (12684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:33,280 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 302.0) internal successors, (12684), 42 states have internal predecessors, (12684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:33,280 INFO L175 Difference]: Start difference. First operand has 154 places, 154 transitions, 2009 flow. Second operand 41 states and 4497 transitions. [2023-11-17 16:24:33,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 473 transitions, 5878 flow [2023-11-17 16:24:33,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 473 transitions, 5613 flow, removed 12 selfloop flow, removed 12 redundant places. [2023-11-17 16:24:33,343 INFO L231 Difference]: Finished difference. Result has 196 places, 269 transitions, 4169 flow [2023-11-17 16:24:33,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4169, PETRI_PLACES=196, PETRI_TRANSITIONS=269} [2023-11-17 16:24:33,343 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 167 predicate places. [2023-11-17 16:24:33,343 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 269 transitions, 4169 flow [2023-11-17 16:24:33,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 103.91666666666667) internal successors, (3741), 36 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:33,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:33,344 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] [2023-11-17 16:24:33,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:33,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:33,545 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:33,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1443825513, now seen corresponding path program 2 times [2023-11-17 16:24:33,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:33,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87295220] [2023-11-17 16:24:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:33,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:33,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:24:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:34,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:24:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87295220] [2023-11-17 16:24:34,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87295220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:24:34,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237409395] [2023-11-17 16:24:34,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:24:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:24:34,579 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:24:34,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 16:24:34,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:24:34,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:24:34,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:24:34,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:24:34,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:24:34,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:24:34,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:24:34,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:24:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:35,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:24:38,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:38,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-11-17 16:24:38,068 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-17 16:24:38,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3948 treesize of output 3699 [2023-11-17 16:24:38,099 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:24:38,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:24:38,126 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:24:38,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 322 [2023-11-17 16:24:38,182 INFO L349 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-17 16:24:38,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 416 treesize of output 332 [2023-11-17 16:24:38,228 INFO L349 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-17 16:24:38,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 249 treesize of output 217 [2023-11-17 16:24:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:24:39,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237409395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:24:39,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:24:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:24:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998537786] [2023-11-17 16:24:39,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:24:39,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:24:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:24:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:24:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1411, Unknown=7, NotChecked=0, Total=1640 [2023-11-17 16:24:39,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:24:39,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 269 transitions, 4169 flow. Second operand has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:39,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:24:39,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:24:39,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:24:42,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:45,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:47,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:49,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:52,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:55,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:24:57,154 INFO L124 PetriNetUnfolderBase]: 1767/2997 cut-off events. [2023-11-17 16:24:57,154 INFO L125 PetriNetUnfolderBase]: For 51537/51537 co-relation queries the response was YES. [2023-11-17 16:24:57,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23066 conditions, 2997 events. 1767/2997 cut-off events. For 51537/51537 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16873 event pairs, 207 based on Foata normal form. 3/3000 useless extension candidates. Maximal degree in co-relation 23001. Up to 686 conditions per place. [2023-11-17 16:24:57,178 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 436 selfloop transitions, 238 changer transitions 35/709 dead transitions. [2023-11-17 16:24:57,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 709 transitions, 11834 flow [2023-11-17 16:24:57,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 16:24:57,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 16:24:57,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4289 transitions. [2023-11-17 16:24:57,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32277242624924746 [2023-11-17 16:24:57,184 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4289 transitions. [2023-11-17 16:24:57,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4289 transitions. [2023-11-17 16:24:57,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:24:57,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4289 transitions. [2023-11-17 16:24:57,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 97.47727272727273) internal successors, (4289), 44 states have internal predecessors, (4289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:57,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 302.0) internal successors, (13590), 45 states have internal predecessors, (13590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:57,199 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 302.0) internal successors, (13590), 45 states have internal predecessors, (13590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:57,199 INFO L175 Difference]: Start difference. First operand has 196 places, 269 transitions, 4169 flow. Second operand 44 states and 4289 transitions. [2023-11-17 16:24:57,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 709 transitions, 11834 flow [2023-11-17 16:24:57,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 709 transitions, 10687 flow, removed 405 selfloop flow, removed 15 redundant places. [2023-11-17 16:24:57,370 INFO L231 Difference]: Finished difference. Result has 247 places, 415 transitions, 7323 flow [2023-11-17 16:24:57,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7323, PETRI_PLACES=247, PETRI_TRANSITIONS=415} [2023-11-17 16:24:57,370 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 218 predicate places. [2023-11-17 16:24:57,370 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 415 transitions, 7323 flow [2023-11-17 16:24:57,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:24:57,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:24:57,371 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] [2023-11-17 16:24:57,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 16:24:57,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:24:57,572 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:24:57,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:24:57,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1890341545, now seen corresponding path program 3 times [2023-11-17 16:24:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:24:57,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054278860] [2023-11-17 16:24:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:24:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:24:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:25:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:01,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:25:01,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054278860] [2023-11-17 16:25:01,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054278860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:25:01,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407463384] [2023-11-17 16:25:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:25:01,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:01,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:25:01,101 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:25:01,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 16:25:01,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:25:01,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:25:01,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-17 16:25:01,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:25:01,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:25:01,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:25:01,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:25:01,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:25:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:01,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:25:02,662 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:02,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 98 [2023-11-17 16:25:02,707 INFO L349 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-11-17 16:25:02,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 972 treesize of output 927 [2023-11-17 16:25:02,748 INFO L349 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-17 16:25:02,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 442 treesize of output 410 [2023-11-17 16:25:02,783 INFO L349 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-17 16:25:02,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 390 treesize of output 306 [2023-11-17 16:25:02,823 INFO L349 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-11-17 16:25:02,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 217 [2023-11-17 16:25:03,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:03,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407463384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:25:03,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:25:03,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:25:03,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957352458] [2023-11-17 16:25:03,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:25:03,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:25:03,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:25:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:25:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1439, Unknown=8, NotChecked=0, Total=1640 [2023-11-17 16:25:03,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:25:03,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 415 transitions, 7323 flow. Second operand has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:03,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:25:03,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:25:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:25:11,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:16,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:30,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:25:35,872 INFO L124 PetriNetUnfolderBase]: 2043/3533 cut-off events. [2023-11-17 16:25:35,873 INFO L125 PetriNetUnfolderBase]: For 65641/65641 co-relation queries the response was YES. [2023-11-17 16:25:35,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27500 conditions, 3533 events. 2043/3533 cut-off events. For 65641/65641 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 21176 event pairs, 226 based on Foata normal form. 4/3537 useless extension candidates. Maximal degree in co-relation 27413. Up to 762 conditions per place. [2023-11-17 16:25:35,907 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 489 selfloop transitions, 385 changer transitions 50/924 dead transitions. [2023-11-17 16:25:35,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 924 transitions, 14841 flow [2023-11-17 16:25:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-17 16:25:35,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-11-17 16:25:35,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7019 transitions. [2023-11-17 16:25:35,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32280169242089773 [2023-11-17 16:25:35,915 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7019 transitions. [2023-11-17 16:25:35,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7019 transitions. [2023-11-17 16:25:35,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:25:35,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7019 transitions. [2023-11-17 16:25:35,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 97.48611111111111) internal successors, (7019), 72 states have internal predecessors, (7019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:35,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 302.0) internal successors, (22046), 73 states have internal predecessors, (22046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:35,945 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 302.0) internal successors, (22046), 73 states have internal predecessors, (22046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:35,946 INFO L175 Difference]: Start difference. First operand has 247 places, 415 transitions, 7323 flow. Second operand 72 states and 7019 transitions. [2023-11-17 16:25:35,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 924 transitions, 14841 flow [2023-11-17 16:25:36,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 924 transitions, 14539 flow, removed 139 selfloop flow, removed 10 redundant places. [2023-11-17 16:25:36,289 INFO L231 Difference]: Finished difference. Result has 339 places, 539 transitions, 10591 flow [2023-11-17 16:25:36,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=7109, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=10591, PETRI_PLACES=339, PETRI_TRANSITIONS=539} [2023-11-17 16:25:36,289 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 310 predicate places. [2023-11-17 16:25:36,290 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 539 transitions, 10591 flow [2023-11-17 16:25:36,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:36,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:25:36,290 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] [2023-11-17 16:25:36,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 16:25:36,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:36,491 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:25:36,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:25:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -30889475, now seen corresponding path program 4 times [2023-11-17 16:25:36,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:25:36,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980731877] [2023-11-17 16:25:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:25:36,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:25:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:25:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:37,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:25:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980731877] [2023-11-17 16:25:37,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980731877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:25:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203710882] [2023-11-17 16:25:37,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:25:37,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:37,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:25:37,526 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:25:37,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 16:25:37,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:25:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:25:37,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:25:37,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:25:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:38,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:25:38,380 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:38,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-11-17 16:25:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:39,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203710882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:25:39,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:25:39,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 34 [2023-11-17 16:25:39,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193744805] [2023-11-17 16:25:39,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:25:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:25:39,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:25:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:25:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 16:25:39,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 302 [2023-11-17 16:25:39,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 539 transitions, 10591 flow. Second operand has 36 states, 36 states have (on average 103.91666666666667) internal successors, (3741), 36 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:39,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:25:39,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 302 [2023-11-17 16:25:39,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:25:43,596 INFO L124 PetriNetUnfolderBase]: 2162/3782 cut-off events. [2023-11-17 16:25:43,597 INFO L125 PetriNetUnfolderBase]: For 78181/78181 co-relation queries the response was YES. [2023-11-17 16:25:43,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30990 conditions, 3782 events. 2162/3782 cut-off events. For 78181/78181 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 23193 event pairs, 261 based on Foata normal form. 2/3784 useless extension candidates. Maximal degree in co-relation 30871. Up to 766 conditions per place. [2023-11-17 16:25:43,637 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 338 selfloop transitions, 378 changer transitions 27/743 dead transitions. [2023-11-17 16:25:43,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 743 transitions, 14088 flow [2023-11-17 16:25:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:25:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:25:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3508 transitions. [2023-11-17 16:25:43,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36299668874172186 [2023-11-17 16:25:43,640 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3508 transitions. [2023-11-17 16:25:43,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3508 transitions. [2023-11-17 16:25:43,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:25:43,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3508 transitions. [2023-11-17 16:25:43,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 109.625) internal successors, (3508), 32 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:43,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 302.0) internal successors, (9966), 33 states have internal predecessors, (9966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:43,651 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 302.0) internal successors, (9966), 33 states have internal predecessors, (9966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:43,651 INFO L175 Difference]: Start difference. First operand has 339 places, 539 transitions, 10591 flow. Second operand 32 states and 3508 transitions. [2023-11-17 16:25:43,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 743 transitions, 14088 flow [2023-11-17 16:25:44,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 743 transitions, 13445 flow, removed 192 selfloop flow, removed 27 redundant places. [2023-11-17 16:25:44,131 INFO L231 Difference]: Finished difference. Result has 350 places, 581 transitions, 11802 flow [2023-11-17 16:25:44,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=10064, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=11802, PETRI_PLACES=350, PETRI_TRANSITIONS=581} [2023-11-17 16:25:44,132 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 321 predicate places. [2023-11-17 16:25:44,132 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 581 transitions, 11802 flow [2023-11-17 16:25:44,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 103.91666666666667) internal successors, (3741), 36 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:44,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:25:44,133 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] [2023-11-17 16:25:44,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 16:25:44,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-17 16:25:44,334 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:25:44,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:25:44,334 INFO L85 PathProgramCache]: Analyzing trace with hash 442566639, now seen corresponding path program 5 times [2023-11-17 16:25:44,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:25:44,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459048354] [2023-11-17 16:25:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:25:44,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:25:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:25:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:45,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:25:45,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459048354] [2023-11-17 16:25:45,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459048354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:25:45,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966170638] [2023-11-17 16:25:45,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:25:45,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:45,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:25:45,633 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:25:45,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 16:25:45,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:25:45,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:25:45,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 16:25:45,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:25:46,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:25:46,107 INFO L378 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 24 treesize of output 19 [2023-11-17 16:25:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:46,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:25:48,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:48,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 114 [2023-11-17 16:25:48,725 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:48,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 56 [2023-11-17 16:25:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:49,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966170638] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:25:49,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:25:49,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-11-17 16:25:49,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408800967] [2023-11-17 16:25:49,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:25:49,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:25:49,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:25:49,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:25:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1300, Unknown=1, NotChecked=0, Total=1482 [2023-11-17 16:25:49,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:25:49,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 581 transitions, 11802 flow. Second operand has 39 states, 39 states have (on average 92.76923076923077) internal successors, (3618), 39 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:49,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:25:49,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:25:49,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:25:54,300 INFO L124 PetriNetUnfolderBase]: 2185/3851 cut-off events. [2023-11-17 16:25:54,300 INFO L125 PetriNetUnfolderBase]: For 87157/87157 co-relation queries the response was YES. [2023-11-17 16:25:54,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32548 conditions, 3851 events. 2185/3851 cut-off events. For 87157/87157 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 23863 event pairs, 349 based on Foata normal form. 3/3854 useless extension candidates. Maximal degree in co-relation 32422. Up to 936 conditions per place. [2023-11-17 16:25:54,343 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 401 selfloop transitions, 332 changer transitions 36/769 dead transitions. [2023-11-17 16:25:54,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 769 transitions, 15006 flow [2023-11-17 16:25:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:25:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:25:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3438 transitions. [2023-11-17 16:25:54,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32526017029328286 [2023-11-17 16:25:54,348 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3438 transitions. [2023-11-17 16:25:54,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3438 transitions. [2023-11-17 16:25:54,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:25:54,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3438 transitions. [2023-11-17 16:25:54,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 98.22857142857143) internal successors, (3438), 35 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:54,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 302.0) internal successors, (10872), 36 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:54,359 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 302.0) internal successors, (10872), 36 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:54,359 INFO L175 Difference]: Start difference. First operand has 350 places, 581 transitions, 11802 flow. Second operand 35 states and 3438 transitions. [2023-11-17 16:25:54,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 769 transitions, 15006 flow [2023-11-17 16:25:54,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 769 transitions, 14684 flow, removed 55 selfloop flow, removed 11 redundant places. [2023-11-17 16:25:54,908 INFO L231 Difference]: Finished difference. Result has 384 places, 594 transitions, 12637 flow [2023-11-17 16:25:54,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=11488, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=12637, PETRI_PLACES=384, PETRI_TRANSITIONS=594} [2023-11-17 16:25:54,909 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 355 predicate places. [2023-11-17 16:25:54,909 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 594 transitions, 12637 flow [2023-11-17 16:25:54,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 92.76923076923077) internal successors, (3618), 39 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:54,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:25:54,910 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] [2023-11-17 16:25:54,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 16:25:55,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-17 16:25:55,116 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:25:55,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:25:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash -604241279, now seen corresponding path program 6 times [2023-11-17 16:25:55,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:25:55,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378842398] [2023-11-17 16:25:55,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:25:55,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:25:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:25:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:56,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:25:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378842398] [2023-11-17 16:25:56,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378842398] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:25:56,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160381480] [2023-11-17 16:25:56,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:25:56,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:25:56,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:25:56,516 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:25:56,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 16:25:56,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:25:56,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:25:56,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 16:25:56,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:25:56,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:25:56,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:25:56,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:25:57,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:25:57,124 INFO L378 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 30 treesize of output 23 [2023-11-17 16:25:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:57,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:25:58,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:58,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 92 [2023-11-17 16:25:58,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:58,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1212 treesize of output 1146 [2023-11-17 16:25:58,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 204 treesize of output 214 [2023-11-17 16:25:58,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 152 [2023-11-17 16:25:58,444 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:25:58,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 177 treesize of output 161 [2023-11-17 16:25:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:25:59,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160381480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:25:59,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:25:59,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:25:59,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823527669] [2023-11-17 16:25:59,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:25:59,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:25:59,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:25:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:25:59,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1436, Unknown=6, NotChecked=0, Total=1640 [2023-11-17 16:25:59,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:25:59,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 594 transitions, 12637 flow. Second operand has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:25:59,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:25:59,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:25:59,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:07,042 INFO L124 PetriNetUnfolderBase]: 2211/3922 cut-off events. [2023-11-17 16:26:07,042 INFO L125 PetriNetUnfolderBase]: For 97711/97711 co-relation queries the response was YES. [2023-11-17 16:26:07,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34352 conditions, 3922 events. 2211/3922 cut-off events. For 97711/97711 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 24423 event pairs, 401 based on Foata normal form. 3/3925 useless extension candidates. Maximal degree in co-relation 34214. Up to 1707 conditions per place. [2023-11-17 16:26:07,096 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 466 selfloop transitions, 307 changer transitions 53/826 dead transitions. [2023-11-17 16:26:07,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 826 transitions, 17115 flow [2023-11-17 16:26:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:26:07,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:26:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4457 transitions. [2023-11-17 16:26:07,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32083213360207313 [2023-11-17 16:26:07,100 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4457 transitions. [2023-11-17 16:26:07,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4457 transitions. [2023-11-17 16:26:07,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:07,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4457 transitions. [2023-11-17 16:26:07,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 96.8913043478261) internal successors, (4457), 46 states have internal predecessors, (4457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:07,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 302.0) internal successors, (14194), 47 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:07,114 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 302.0) internal successors, (14194), 47 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:07,114 INFO L175 Difference]: Start difference. First operand has 384 places, 594 transitions, 12637 flow. Second operand 46 states and 4457 transitions. [2023-11-17 16:26:07,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 826 transitions, 17115 flow [2023-11-17 16:26:07,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 826 transitions, 16819 flow, removed 31 selfloop flow, removed 22 redundant places. [2023-11-17 16:26:07,764 INFO L231 Difference]: Finished difference. Result has 419 places, 656 transitions, 14391 flow [2023-11-17 16:26:07,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=12373, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=14391, PETRI_PLACES=419, PETRI_TRANSITIONS=656} [2023-11-17 16:26:07,765 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 390 predicate places. [2023-11-17 16:26:07,765 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 656 transitions, 14391 flow [2023-11-17 16:26:07,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:07,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:07,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:26:07,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:07,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-17 16:26:07,973 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:26:07,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:07,973 INFO L85 PathProgramCache]: Analyzing trace with hash -50029123, now seen corresponding path program 7 times [2023-11-17 16:26:07,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:07,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513320291] [2023-11-17 16:26:07,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:07,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513320291] [2023-11-17 16:26:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513320291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843713718] [2023-11-17 16:26:09,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:26:09,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:09,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:09,712 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:09,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 16:26:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:09,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 16:26:09,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:09,845 INFO L378 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 167 treesize of output 163 [2023-11-17 16:26:10,141 INFO L378 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 24 treesize of output 19 [2023-11-17 16:26:10,302 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-17 16:26:10,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2023-11-17 16:26:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:10,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:10,983 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:26:10,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 117 [2023-11-17 16:26:11,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:11,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 60 [2023-11-17 16:26:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:11,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843713718] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:11,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:11,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-11-17 16:26:11,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447049143] [2023-11-17 16:26:11,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:11,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:26:11,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:26:11,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1314, Unknown=1, NotChecked=0, Total=1482 [2023-11-17 16:26:11,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:26:11,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 656 transitions, 14391 flow. Second operand has 39 states, 39 states have (on average 92.76923076923077) internal successors, (3618), 39 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:11,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:11,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:26:11,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:18,068 INFO L124 PetriNetUnfolderBase]: 2205/3878 cut-off events. [2023-11-17 16:26:18,069 INFO L125 PetriNetUnfolderBase]: For 103888/103888 co-relation queries the response was YES. [2023-11-17 16:26:18,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35089 conditions, 3878 events. 2205/3878 cut-off events. For 103888/103888 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23982 event pairs, 462 based on Foata normal form. 2/3880 useless extension candidates. Maximal degree in co-relation 34941. Up to 2084 conditions per place. [2023-11-17 16:26:18,120 INFO L140 encePairwiseOnDemand]: 290/302 looper letters, 620 selfloop transitions, 116 changer transitions 18/754 dead transitions. [2023-11-17 16:26:18,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 754 transitions, 16648 flow [2023-11-17 16:26:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:26:18,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:26:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2163 transitions. [2023-11-17 16:26:18,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255568934376881 [2023-11-17 16:26:18,123 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2163 transitions. [2023-11-17 16:26:18,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2163 transitions. [2023-11-17 16:26:18,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:18,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2163 transitions. [2023-11-17 16:26:18,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 98.31818181818181) internal successors, (2163), 22 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:18,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 302.0) internal successors, (6946), 23 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:18,128 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 302.0) internal successors, (6946), 23 states have internal predecessors, (6946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:18,128 INFO L175 Difference]: Start difference. First operand has 419 places, 656 transitions, 14391 flow. Second operand 22 states and 2163 transitions. [2023-11-17 16:26:18,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 754 transitions, 16648 flow [2023-11-17 16:26:18,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 754 transitions, 15774 flow, removed 174 selfloop flow, removed 32 redundant places. [2023-11-17 16:26:18,859 INFO L231 Difference]: Finished difference. Result has 403 places, 656 transitions, 13792 flow [2023-11-17 16:26:18,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=13537, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=13792, PETRI_PLACES=403, PETRI_TRANSITIONS=656} [2023-11-17 16:26:18,860 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 374 predicate places. [2023-11-17 16:26:18,860 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 656 transitions, 13792 flow [2023-11-17 16:26:18,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 92.76923076923077) internal successors, (3618), 39 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:18,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:18,861 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] [2023-11-17 16:26:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:19,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:19,067 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:26:19,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1084212951, now seen corresponding path program 8 times [2023-11-17 16:26:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434808723] [2023-11-17 16:26:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:21,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:21,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434808723] [2023-11-17 16:26:21,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434808723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:21,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147036277] [2023-11-17 16:26:21,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:26:21,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:21,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:21,304 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:21,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 16:26:21,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:26:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:21,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:26:21,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:21,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:21,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:22,039 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:26:22,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 60 [2023-11-17 16:26:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:25,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147036277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:25,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:25,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 34 [2023-11-17 16:26:25,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811735744] [2023-11-17 16:26:25,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:25,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:26:25,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:26:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 16:26:25,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:26:25,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 656 transitions, 13792 flow. Second operand has 36 states, 36 states have (on average 92.91666666666667) internal successors, (3345), 36 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:25,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:25,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:26:25,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:34,908 INFO L124 PetriNetUnfolderBase]: 2397/4172 cut-off events. [2023-11-17 16:26:34,908 INFO L125 PetriNetUnfolderBase]: For 111862/111862 co-relation queries the response was YES. [2023-11-17 16:26:34,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37446 conditions, 4172 events. 2397/4172 cut-off events. For 111862/111862 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25710 event pairs, 495 based on Foata normal form. 2/4174 useless extension candidates. Maximal degree in co-relation 37303. Up to 2083 conditions per place. [2023-11-17 16:26:34,965 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 580 selfloop transitions, 234 changer transitions 26/840 dead transitions. [2023-11-17 16:26:34,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 840 transitions, 17461 flow [2023-11-17 16:26:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:26:34,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:26:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3428 transitions. [2023-11-17 16:26:34,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32431409649952697 [2023-11-17 16:26:34,968 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3428 transitions. [2023-11-17 16:26:34,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3428 transitions. [2023-11-17 16:26:34,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:34,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3428 transitions. [2023-11-17 16:26:34,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 97.94285714285714) internal successors, (3428), 35 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:35,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 302.0) internal successors, (10872), 36 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:35,075 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 302.0) internal successors, (10872), 36 states have internal predecessors, (10872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:35,075 INFO L175 Difference]: Start difference. First operand has 403 places, 656 transitions, 13792 flow. Second operand 35 states and 3428 transitions. [2023-11-17 16:26:35,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 840 transitions, 17461 flow [2023-11-17 16:26:35,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 840 transitions, 17236 flow, removed 10 selfloop flow, removed 17 redundant places. [2023-11-17 16:26:35,733 INFO L231 Difference]: Finished difference. Result has 426 places, 712 transitions, 15442 flow [2023-11-17 16:26:35,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=13616, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15442, PETRI_PLACES=426, PETRI_TRANSITIONS=712} [2023-11-17 16:26:35,734 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 397 predicate places. [2023-11-17 16:26:35,734 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 712 transitions, 15442 flow [2023-11-17 16:26:35,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 92.91666666666667) internal successors, (3345), 36 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:35,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:35,735 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] [2023-11-17 16:26:35,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:35,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 16:26:35,936 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:26:35,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash -605019169, now seen corresponding path program 9 times [2023-11-17 16:26:35,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:35,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865975041] [2023-11-17 16:26:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:35,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:36,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865975041] [2023-11-17 16:26:36,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865975041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:36,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551434934] [2023-11-17 16:26:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:26:36,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:36,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:36,806 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:36,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 16:26:36,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:26:36,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:36,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:26:36,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:26:37,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:37,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:37,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-11-17 16:26:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:26:37,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551434934] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:37,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:37,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-11-17 16:26:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061492848] [2023-11-17 16:26:37,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:37,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:26:37,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:26:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2023-11-17 16:26:37,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 302 [2023-11-17 16:26:37,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 712 transitions, 15442 flow. Second operand has 29 states, 29 states have (on average 104.17241379310344) internal successors, (3021), 29 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:37,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:37,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 302 [2023-11-17 16:26:37,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:41,356 INFO L124 PetriNetUnfolderBase]: 2785/4777 cut-off events. [2023-11-17 16:26:41,357 INFO L125 PetriNetUnfolderBase]: For 141729/141729 co-relation queries the response was YES. [2023-11-17 16:26:41,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44512 conditions, 4777 events. 2785/4777 cut-off events. For 141729/141729 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 29574 event pairs, 412 based on Foata normal form. 3/4780 useless extension candidates. Maximal degree in co-relation 44363. Up to 1175 conditions per place. [2023-11-17 16:26:41,421 INFO L140 encePairwiseOnDemand]: 290/302 looper letters, 480 selfloop transitions, 484 changer transitions 42/1006 dead transitions. [2023-11-17 16:26:41,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 1006 transitions, 21606 flow [2023-11-17 16:26:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:26:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:26:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3934 transitions. [2023-11-17 16:26:41,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36184694628403236 [2023-11-17 16:26:41,424 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3934 transitions. [2023-11-17 16:26:41,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3934 transitions. [2023-11-17 16:26:41,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:41,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3934 transitions. [2023-11-17 16:26:41,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 109.27777777777777) internal successors, (3934), 36 states have internal predecessors, (3934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 302.0) internal successors, (11174), 37 states have internal predecessors, (11174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,432 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 302.0) internal successors, (11174), 37 states have internal predecessors, (11174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:41,432 INFO L175 Difference]: Start difference. First operand has 426 places, 712 transitions, 15442 flow. Second operand 36 states and 3934 transitions. [2023-11-17 16:26:41,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 1006 transitions, 21606 flow [2023-11-17 16:26:42,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1006 transitions, 21038 flow, removed 174 selfloop flow, removed 16 redundant places. [2023-11-17 16:26:42,311 INFO L231 Difference]: Finished difference. Result has 460 places, 840 transitions, 19211 flow [2023-11-17 16:26:42,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=14933, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=19211, PETRI_PLACES=460, PETRI_TRANSITIONS=840} [2023-11-17 16:26:42,312 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 431 predicate places. [2023-11-17 16:26:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 840 transitions, 19211 flow [2023-11-17 16:26:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 104.17241379310344) internal successors, (3021), 29 states have internal predecessors, (3021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:42,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:42,312 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] [2023-11-17 16:26:42,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:42,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 16:26:42,513 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:26:42,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:42,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1087124147, now seen corresponding path program 10 times [2023-11-17 16:26:42,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:42,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881564976] [2023-11-17 16:26:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:45,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881564976] [2023-11-17 16:26:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881564976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821747970] [2023-11-17 16:26:45,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:26:45,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:45,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:45,913 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:45,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 16:26:46,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:26:46,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:46,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-17 16:26:46,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:46,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:46,697 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:46,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 62 [2023-11-17 16:26:47,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:47,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821747970] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:47,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:47,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-11-17 16:26:47,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483439835] [2023-11-17 16:26:47,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:47,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:26:47,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:47,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:26:47,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 16:26:47,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:26:47,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 840 transitions, 19211 flow. Second operand has 37 states, 37 states have (on average 92.86486486486487) internal successors, (3436), 37 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:47,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:47,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:26:47,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:26:54,178 INFO L124 PetriNetUnfolderBase]: 3239/5564 cut-off events. [2023-11-17 16:26:54,179 INFO L125 PetriNetUnfolderBase]: For 175448/175448 co-relation queries the response was YES. [2023-11-17 16:26:54,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52402 conditions, 5564 events. 3239/5564 cut-off events. For 175448/175448 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35551 event pairs, 405 based on Foata normal form. 13/5577 useless extension candidates. Maximal degree in co-relation 52239. Up to 1034 conditions per place. [2023-11-17 16:26:54,418 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 496 selfloop transitions, 588 changer transitions 63/1147 dead transitions. [2023-11-17 16:26:54,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1147 transitions, 26966 flow [2023-11-17 16:26:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 16:26:54,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 16:26:54,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3525 transitions. [2023-11-17 16:26:54,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3242273730684327 [2023-11-17 16:26:54,421 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3525 transitions. [2023-11-17 16:26:54,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3525 transitions. [2023-11-17 16:26:54,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:26:54,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3525 transitions. [2023-11-17 16:26:54,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 97.91666666666667) internal successors, (3525), 36 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:54,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 302.0) internal successors, (11174), 37 states have internal predecessors, (11174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:54,428 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 302.0) internal successors, (11174), 37 states have internal predecessors, (11174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:54,428 INFO L175 Difference]: Start difference. First operand has 460 places, 840 transitions, 19211 flow. Second operand 36 states and 3525 transitions. [2023-11-17 16:26:54,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1147 transitions, 26966 flow [2023-11-17 16:26:55,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 1147 transitions, 26169 flow, removed 162 selfloop flow, removed 22 redundant places. [2023-11-17 16:26:55,615 INFO L231 Difference]: Finished difference. Result has 478 places, 972 transitions, 23714 flow [2023-11-17 16:26:55,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=18503, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=840, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=476, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23714, PETRI_PLACES=478, PETRI_TRANSITIONS=972} [2023-11-17 16:26:55,616 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 449 predicate places. [2023-11-17 16:26:55,616 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 972 transitions, 23714 flow [2023-11-17 16:26:55,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 92.86486486486487) internal successors, (3436), 37 states have internal predecessors, (3436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:55,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:26:55,617 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] [2023-11-17 16:26:55,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 16:26:55,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 16:26:55,823 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:26:55,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:26:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1946839139, now seen corresponding path program 11 times [2023-11-17 16:26:55,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:26:55,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667038376] [2023-11-17 16:26:55,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:26:55,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:26:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:26:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:26:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667038376] [2023-11-17 16:26:56,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667038376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:26:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261976484] [2023-11-17 16:26:56,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:26:56,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:26:56,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:26:56,951 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:26:56,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 16:26:57,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:26:57,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:26:57,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 16:26:57,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:26:57,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:26:57,372 INFO L378 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 24 treesize of output 19 [2023-11-17 16:26:57,515 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-11-17 16:26:57,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 35 [2023-11-17 16:26:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:57,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:26:57,835 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:26:57,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 113 [2023-11-17 16:26:57,857 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:26:57,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 56 [2023-11-17 16:26:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:26:59,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261976484] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:26:59,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:26:59,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 35 [2023-11-17 16:26:59,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281563136] [2023-11-17 16:26:59,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:26:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:26:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:26:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:26:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1189, Unknown=1, NotChecked=0, Total=1332 [2023-11-17 16:26:59,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 302 [2023-11-17 16:26:59,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 972 transitions, 23714 flow. Second operand has 37 states, 37 states have (on average 98.86486486486487) internal successors, (3658), 37 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:26:59,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:26:59,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 302 [2023-11-17 16:26:59,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:03,969 INFO L124 PetriNetUnfolderBase]: 3242/5479 cut-off events. [2023-11-17 16:27:03,970 INFO L125 PetriNetUnfolderBase]: For 181839/181839 co-relation queries the response was YES. [2023-11-17 16:27:04,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53170 conditions, 5479 events. 3242/5479 cut-off events. For 181839/181839 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34145 event pairs, 684 based on Foata normal form. 3/5482 useless extension candidates. Maximal degree in co-relation 53006. Up to 2948 conditions per place. [2023-11-17 16:27:04,203 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 896 selfloop transitions, 170 changer transitions 31/1097 dead transitions. [2023-11-17 16:27:04,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1097 transitions, 27143 flow [2023-11-17 16:27:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:27:04,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:27:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2712 transitions. [2023-11-17 16:27:04,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3453897096281202 [2023-11-17 16:27:04,208 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2712 transitions. [2023-11-17 16:27:04,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2712 transitions. [2023-11-17 16:27:04,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:04,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2712 transitions. [2023-11-17 16:27:04,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 104.3076923076923) internal successors, (2712), 26 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 302.0) internal successors, (8154), 27 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,215 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 302.0) internal successors, (8154), 27 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:04,216 INFO L175 Difference]: Start difference. First operand has 478 places, 972 transitions, 23714 flow. Second operand 26 states and 2712 transitions. [2023-11-17 16:27:04,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1097 transitions, 27143 flow [2023-11-17 16:27:05,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1097 transitions, 26749 flow, removed 111 selfloop flow, removed 14 redundant places. [2023-11-17 16:27:05,638 INFO L231 Difference]: Finished difference. Result has 490 places, 985 transitions, 24064 flow [2023-11-17 16:27:05,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=23332, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=972, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=810, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24064, PETRI_PLACES=490, PETRI_TRANSITIONS=985} [2023-11-17 16:27:05,639 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 461 predicate places. [2023-11-17 16:27:05,639 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 985 transitions, 24064 flow [2023-11-17 16:27:05,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.86486486486487) internal successors, (3658), 37 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:05,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:05,640 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] [2023-11-17 16:27:05,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:05,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 16:27:05,846 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:05,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2070680813, now seen corresponding path program 12 times [2023-11-17 16:27:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:05,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796890197] [2023-11-17 16:27:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:07,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:07,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:07,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796890197] [2023-11-17 16:27:07,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796890197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:07,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941723691] [2023-11-17 16:27:07,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:27:07,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:07,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:07,756 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:07,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 16:27:07,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:27:07,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:27:07,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 16:27:07,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:07,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:27:08,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:27:08,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:27:08,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:27:08,292 INFO L378 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 24 treesize of output 19 [2023-11-17 16:27:08,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:08,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:10,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:10,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 94 [2023-11-17 16:27:10,956 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:27:10,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4404 treesize of output 4022 [2023-11-17 16:27:10,995 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:10,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 429 treesize of output 371 [2023-11-17 16:27:11,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:27:11,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:11,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 265 treesize of output 270 [2023-11-17 16:27:11,158 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:27:11,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 259 treesize of output 233 [2023-11-17 16:27:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:14,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941723691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:14,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:27:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920038046] [2023-11-17 16:27:14,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:27:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:27:14,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1462, Unknown=9, NotChecked=0, Total=1640 [2023-11-17 16:27:14,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:27:14,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 985 transitions, 24064 flow. Second operand has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:14,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:14,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:27:14,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:21,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:23,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:29,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:32,961 INFO L124 PetriNetUnfolderBase]: 3339/5708 cut-off events. [2023-11-17 16:27:32,961 INFO L125 PetriNetUnfolderBase]: For 189501/189501 co-relation queries the response was YES. [2023-11-17 16:27:33,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54401 conditions, 5708 events. 3339/5708 cut-off events. For 189501/189501 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36503 event pairs, 680 based on Foata normal form. 2/5710 useless extension candidates. Maximal degree in co-relation 54232. Up to 2948 conditions per place. [2023-11-17 16:27:33,052 INFO L140 encePairwiseOnDemand]: 289/302 looper letters, 864 selfloop transitions, 246 changer transitions 28/1138 dead transitions. [2023-11-17 16:27:33,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1138 transitions, 27683 flow [2023-11-17 16:27:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 16:27:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 16:27:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2766 transitions. [2023-11-17 16:27:33,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271050141911069 [2023-11-17 16:27:33,055 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2766 transitions. [2023-11-17 16:27:33,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2766 transitions. [2023-11-17 16:27:33,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:33,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2766 transitions. [2023-11-17 16:27:33,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 98.78571428571429) internal successors, (2766), 28 states have internal predecessors, (2766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:33,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 302.0) internal successors, (8758), 29 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:33,061 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 302.0) internal successors, (8758), 29 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:33,061 INFO L175 Difference]: Start difference. First operand has 490 places, 985 transitions, 24064 flow. Second operand 28 states and 2766 transitions. [2023-11-17 16:27:33,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1138 transitions, 27683 flow [2023-11-17 16:27:34,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1138 transitions, 27504 flow, removed 17 selfloop flow, removed 19 redundant places. [2023-11-17 16:27:34,413 INFO L231 Difference]: Finished difference. Result has 501 places, 1009 transitions, 25092 flow [2023-11-17 16:27:34,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=23910, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=985, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25092, PETRI_PLACES=501, PETRI_TRANSITIONS=1009} [2023-11-17 16:27:34,414 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 472 predicate places. [2023-11-17 16:27:34,415 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 1009 transitions, 25092 flow [2023-11-17 16:27:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:34,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:27:34,415 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] [2023-11-17 16:27:34,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 16:27:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-17 16:27:34,616 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:27:34,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:27:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1029932141, now seen corresponding path program 13 times [2023-11-17 16:27:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:27:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877011833] [2023-11-17 16:27:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:27:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:27:34,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:27:35,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:27:35,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877011833] [2023-11-17 16:27:35,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877011833] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:27:35,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87899980] [2023-11-17 16:27:35,576 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:27:35,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:27:35,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:27:35,577 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:27:35,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 16:27:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:27:35,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-17 16:27:35,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:27:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:27:35,916 INFO L378 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 24 treesize of output 19 [2023-11-17 16:27:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:27:36,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:27:36,202 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1452 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1452) c_~queue~0.base))) (or (not (= (mod (select .cse0 (+ (* c_~end~0 4) c_~queue~0.offset)) 4294967296) (mod (+ c_~B~0 |c_thread2Thread1of1ForFork2_~x~1#1|) 4294967296))) (let ((.cse1 (* c_~start~0 4))) (= (mod (select .cse0 (+ .cse1 c_~queue~0.offset)) 4294967296) (mod (select .cse0 (+ .cse1 c_~queue~0.offset 4)) 4294967296)))))) is different from false [2023-11-17 16:27:36,243 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:36,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 118 [2023-11-17 16:27:36,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:27:36,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 60 [2023-11-17 16:27:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-11-17 16:27:36,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87899980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:27:36,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:27:36,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 31 [2023-11-17 16:27:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570673564] [2023-11-17 16:27:36,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:27:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:27:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:27:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:27:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=894, Unknown=7, NotChecked=60, Total=1056 [2023-11-17 16:27:36,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 302 [2023-11-17 16:27:36,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 1009 transitions, 25092 flow. Second operand has 33 states, 33 states have (on average 99.03030303030303) internal successors, (3268), 33 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:36,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:27:36,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 302 [2023-11-17 16:27:36,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:27:41,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:43,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:48,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:50,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:52,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:55,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:57,747 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 16:27:58,785 INFO L124 PetriNetUnfolderBase]: 3427/5911 cut-off events. [2023-11-17 16:27:58,785 INFO L125 PetriNetUnfolderBase]: For 205776/205776 co-relation queries the response was YES. [2023-11-17 16:27:58,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56922 conditions, 5911 events. 3427/5911 cut-off events. For 205776/205776 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 38501 event pairs, 459 based on Foata normal form. 4/5915 useless extension candidates. Maximal degree in co-relation 56751. Up to 1046 conditions per place. [2023-11-17 16:27:58,899 INFO L140 encePairwiseOnDemand]: 287/302 looper letters, 566 selfloop transitions, 595 changer transitions 59/1220 dead transitions. [2023-11-17 16:27:58,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1220 transitions, 29374 flow [2023-11-17 16:27:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:27:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:27:58,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4265 transitions. [2023-11-17 16:27:58,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444516233241803 [2023-11-17 16:27:58,905 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4265 transitions. [2023-11-17 16:27:58,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4265 transitions. [2023-11-17 16:27:58,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:27:58,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4265 transitions. [2023-11-17 16:27:58,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 104.02439024390245) internal successors, (4265), 41 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) [2023-11-17 16:27:58,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 302.0) internal successors, (12684), 42 states have internal predecessors, (12684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:58,918 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 302.0) internal successors, (12684), 42 states have internal predecessors, (12684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:27:58,918 INFO L175 Difference]: Start difference. First operand has 501 places, 1009 transitions, 25092 flow. Second operand 41 states and 4265 transitions. [2023-11-17 16:27:58,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1220 transitions, 29374 flow [2023-11-17 16:28:00,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 1220 transitions, 29174 flow, removed 38 selfloop flow, removed 15 redundant places. [2023-11-17 16:28:00,409 INFO L231 Difference]: Finished difference. Result has 540 places, 1035 transitions, 26895 flow [2023-11-17 16:28:00,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=24909, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1009, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=26895, PETRI_PLACES=540, PETRI_TRANSITIONS=1035} [2023-11-17 16:28:00,411 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 511 predicate places. [2023-11-17 16:28:00,411 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1035 transitions, 26895 flow [2023-11-17 16:28:00,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 99.03030303030303) internal successors, (3268), 33 states have internal predecessors, (3268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:00,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:00,411 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] [2023-11-17 16:28:00,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 16:28:00,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:00,612 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:00,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:00,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1038088665, now seen corresponding path program 14 times [2023-11-17 16:28:00,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:00,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265093018] [2023-11-17 16:28:00,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:00,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:01,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:01,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265093018] [2023-11-17 16:28:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265093018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:01,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495230501] [2023-11-17 16:28:01,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:28:01,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:01,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:01,418 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:28:01,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 16:28:01,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:28:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:01,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 16:28:01,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:01,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:28:01,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:28:01,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:28:02,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:28:02,028 INFO L378 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 32 treesize of output 25 [2023-11-17 16:28:02,125 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-17 16:28:02,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2023-11-17 16:28:02,154 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:02,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:16,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:16,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 95 [2023-11-17 16:28:16,636 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:28:16,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 748 treesize of output 718 [2023-11-17 16:28:16,654 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:28:16,709 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:16,709 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 217 treesize of output 228 [2023-11-17 16:28:16,724 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:28:16,789 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:16,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 217 treesize of output 203 [2023-11-17 16:28:16,813 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:16,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 126 [2023-11-17 16:28:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:32,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495230501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:32,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:32,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 38 [2023-11-17 16:28:32,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930148609] [2023-11-17 16:28:32,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:32,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-17 16:28:32,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:32,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-17 16:28:32,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1368, Unknown=8, NotChecked=0, Total=1560 [2023-11-17 16:28:32,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:28:32,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1035 transitions, 26895 flow. Second operand has 40 states, 40 states have (on average 92.725) internal successors, (3709), 40 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:32,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:32,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:28:32,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:28:41,170 INFO L124 PetriNetUnfolderBase]: 3392/5828 cut-off events. [2023-11-17 16:28:41,170 INFO L125 PetriNetUnfolderBase]: For 227503/227503 co-relation queries the response was YES. [2023-11-17 16:28:41,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60866 conditions, 5828 events. 3392/5828 cut-off events. For 227503/227503 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37838 event pairs, 652 based on Foata normal form. 2/5830 useless extension candidates. Maximal degree in co-relation 60684. Up to 3036 conditions per place. [2023-11-17 16:28:41,264 INFO L140 encePairwiseOnDemand]: 290/302 looper letters, 878 selfloop transitions, 225 changer transitions 24/1127 dead transitions. [2023-11-17 16:28:41,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 1127 transitions, 29981 flow [2023-11-17 16:28:41,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:28:41,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:28:41,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2356 transitions. [2023-11-17 16:28:41,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3250551876379691 [2023-11-17 16:28:41,267 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2356 transitions. [2023-11-17 16:28:41,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2356 transitions. [2023-11-17 16:28:41,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:28:41,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2356 transitions. [2023-11-17 16:28:41,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.16666666666667) internal successors, (2356), 24 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:41,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 302.0) internal successors, (7550), 25 states have internal predecessors, (7550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:41,272 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 302.0) internal successors, (7550), 25 states have internal predecessors, (7550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:41,272 INFO L175 Difference]: Start difference. First operand has 540 places, 1035 transitions, 26895 flow. Second operand 24 states and 2356 transitions. [2023-11-17 16:28:41,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 1127 transitions, 29981 flow [2023-11-17 16:28:42,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 1127 transitions, 28922 flow, removed 37 selfloop flow, removed 25 redundant places. [2023-11-17 16:28:42,898 INFO L231 Difference]: Finished difference. Result has 535 places, 1033 transitions, 26314 flow [2023-11-17 16:28:42,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=25848, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=26314, PETRI_PLACES=535, PETRI_TRANSITIONS=1033} [2023-11-17 16:28:42,899 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 506 predicate places. [2023-11-17 16:28:42,899 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1033 transitions, 26314 flow [2023-11-17 16:28:42,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 92.725) internal successors, (3709), 40 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:42,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:28:42,900 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] [2023-11-17 16:28:42,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 16:28:43,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-17 16:28:43,106 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:28:43,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:28:43,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1501737379, now seen corresponding path program 15 times [2023-11-17 16:28:43,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:28:43,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125780674] [2023-11-17 16:28:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:28:43,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:28:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:28:43,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:43,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:28:43,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125780674] [2023-11-17 16:28:43,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125780674] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:28:43,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564740594] [2023-11-17 16:28:43,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:28:43,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:28:43,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:28:43,780 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:28:43,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 16:28:44,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:28:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:28:44,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-17 16:28:44,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:28:44,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:28:44,078 INFO L378 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 14 treesize of output 12 [2023-11-17 16:28:44,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:28:44,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:28:44,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:28:44,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:28:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:44,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:28:50,281 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:50,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 97 [2023-11-17 16:28:50,440 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:28:50,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1932 treesize of output 1836 [2023-11-17 16:28:50,465 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:28:50,553 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:50,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 321 treesize of output 307 [2023-11-17 16:28:50,581 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:28:50,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:28:50,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 271 treesize of output 282 [2023-11-17 16:28:50,855 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:28:50,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 297 treesize of output 233 [2023-11-17 16:28:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:28:55,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564740594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:28:55,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:28:55,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 37 [2023-11-17 16:28:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560615888] [2023-11-17 16:28:55,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:28:55,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 16:28:55,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:28:55,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 16:28:55,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1242, Unknown=7, NotChecked=0, Total=1482 [2023-11-17 16:28:55,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:28:55,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1033 transitions, 26314 flow. Second operand has 39 states, 39 states have (on average 92.76923076923077) internal successors, (3618), 39 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:28:55,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:28:55,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:28:55,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:29:06,136 INFO L124 PetriNetUnfolderBase]: 3556/6084 cut-off events. [2023-11-17 16:29:06,136 INFO L125 PetriNetUnfolderBase]: For 227273/227273 co-relation queries the response was YES. [2023-11-17 16:29:06,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64187 conditions, 6084 events. 3556/6084 cut-off events. For 227273/227273 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39486 event pairs, 675 based on Foata normal form. 2/6086 useless extension candidates. Maximal degree in co-relation 64007. Up to 3036 conditions per place. [2023-11-17 16:29:06,227 INFO L140 encePairwiseOnDemand]: 288/302 looper letters, 877 selfloop transitions, 298 changer transitions 26/1201 dead transitions. [2023-11-17 16:29:06,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1201 transitions, 30983 flow [2023-11-17 16:29:06,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:29:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:29:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2857 transitions. [2023-11-17 16:29:06,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.326216031057319 [2023-11-17 16:29:06,229 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2857 transitions. [2023-11-17 16:29:06,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2857 transitions. [2023-11-17 16:29:06,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:29:06,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2857 transitions. [2023-11-17 16:29:06,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 98.51724137931035) internal successors, (2857), 29 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:06,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 302.0) internal successors, (9060), 30 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:06,235 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 302.0) internal successors, (9060), 30 states have internal predecessors, (9060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:06,235 INFO L175 Difference]: Start difference. First operand has 535 places, 1033 transitions, 26314 flow. Second operand 29 states and 2857 transitions. [2023-11-17 16:29:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1201 transitions, 30983 flow [2023-11-17 16:29:07,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1201 transitions, 30804 flow, removed 18 selfloop flow, removed 14 redundant places. [2023-11-17 16:29:07,788 INFO L231 Difference]: Finished difference. Result has 557 places, 1082 transitions, 28417 flow [2023-11-17 16:29:07,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=302, PETRI_DIFFERENCE_MINUEND_FLOW=26156, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28417, PETRI_PLACES=557, PETRI_TRANSITIONS=1082} [2023-11-17 16:29:07,788 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 528 predicate places. [2023-11-17 16:29:07,789 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1082 transitions, 28417 flow [2023-11-17 16:29:07,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 92.76923076923077) internal successors, (3618), 39 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:29:07,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:29:07,789 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] [2023-11-17 16:29:07,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 16:29:07,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:29:07,990 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 16:29:07,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:29:07,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1474539351, now seen corresponding path program 16 times [2023-11-17 16:29:07,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:29:07,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014068860] [2023-11-17 16:29:07,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:29:07,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:29:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:29:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:29:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014068860] [2023-11-17 16:29:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014068860] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:29:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652057000] [2023-11-17 16:29:10,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:29:10,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:29:10,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:29:10,692 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:29:10,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 16:29:10,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:29:10,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:29:10,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-17 16:29:10,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:29:10,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:29:10,866 INFO L378 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 14 treesize of output 12 [2023-11-17 16:29:11,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-17 16:29:11,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:29:11,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:29:11,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:29:12,043 INFO L349 Elim1Store]: treesize reduction 34, result has 17.1 percent of original size [2023-11-17 16:29:12,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 38 [2023-11-17 16:29:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:29:12,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:29:17,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:17,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 101 [2023-11-17 16:29:17,775 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:29:17,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2060 treesize of output 1964 [2023-11-17 16:29:17,801 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:29:17,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:17,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 339 [2023-11-17 16:29:17,919 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:29:18,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:29:18,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 303 treesize of output 314 [2023-11-17 16:29:18,197 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-11-17 16:29:18,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 329 treesize of output 265 [2023-11-17 16:31:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:31:08,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652057000] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:31:08,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:31:08,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-11-17 16:31:08,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413041655] [2023-11-17 16:31:08,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:31:08,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 16:31:08,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:31:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 16:31:08,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1377, Unknown=7, NotChecked=0, Total=1640 [2023-11-17 16:31:08,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 302 [2023-11-17 16:31:08,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1082 transitions, 28417 flow. Second operand has 41 states, 41 states have (on average 92.6829268292683) internal successors, (3800), 41 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:31:08,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:31:08,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 302 [2023-11-17 16:31:08,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-11-17 16:31:12,141 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:31:12,141 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:31:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:31:12,182 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 16:31:12,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 16:31:12,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-17 16:31:12,389 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. [2023-11-17 16:31:12,390 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 16:31:12,390 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 16:31:12,390 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 16:31:12,390 INFO L445 BasicCegarLoop]: Path program histogram: [22, 16, 3, 2, 2] [2023-11-17 16:31:12,393 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:31:12,393 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:31:12,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:31:12 BasicIcfg [2023-11-17 16:31:12,395 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:31:12,395 INFO L158 Benchmark]: Toolchain (without parser) took 499396.46ms. Allocated memory was 269.5MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 220.7MB in the beginning and 497.6MB in the end (delta: -276.9MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2023-11-17 16:31:12,395 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 194.0MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:31:12,395 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.13ms. Allocated memory is still 269.5MB. Free memory was 220.7MB in the beginning and 208.7MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:31:12,396 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.96ms. Allocated memory is still 269.5MB. Free memory was 208.7MB in the beginning and 206.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:31:12,396 INFO L158 Benchmark]: Boogie Preprocessor took 46.27ms. Allocated memory is still 269.5MB. Free memory was 206.6MB in the beginning and 205.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:31:12,396 INFO L158 Benchmark]: RCFGBuilder took 707.19ms. Allocated memory is still 269.5MB. Free memory was 204.5MB in the beginning and 176.1MB in the end (delta: 28.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2023-11-17 16:31:12,396 INFO L158 Benchmark]: TraceAbstraction took 498361.11ms. Allocated memory was 269.5MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 175.1MB in the beginning and 497.6MB in the end (delta: -322.5MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. [2023-11-17 16:31:12,397 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 194.0MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.13ms. Allocated memory is still 269.5MB. Free memory was 220.7MB in the beginning and 208.7MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 38.96ms. Allocated memory is still 269.5MB. Free memory was 208.7MB in the beginning and 206.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 46.27ms. Allocated memory is still 269.5MB. Free memory was 206.6MB in the beginning and 205.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 707.19ms. Allocated memory is still 269.5MB. Free memory was 204.5MB in the beginning and 176.1MB in the end (delta: 28.3MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * TraceAbstraction took 498361.11ms. Allocated memory was 269.5MB in the beginning and 2.4GB in the end (delta: 2.1GB). Free memory was 175.1MB in the beginning and 497.6MB in the end (delta: -322.5MB). Peak memory consumption was 1.8GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 148 PlacesBefore, 29 PlacesAfterwards, 147 TransitionsBefore, 22 TransitionsAfterwards, 1814 CoEnabledTransitionPairs, 7 FixpointIterations, 80 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 4 ConcurrentYvCompositions, 6 ChoiceCompositions, 141 TotalNumberOfCompositions, 1829 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1580, independent: 1548, independent conditional: 0, independent unconditional: 1548, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1207, independent: 1193, independent conditional: 0, independent unconditional: 1193, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1207, independent: 1193, independent conditional: 0, independent unconditional: 1193, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 14, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 71, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 71, dependent conditional: 0, dependent unconditional: 71, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1580, independent: 355, independent conditional: 0, independent unconditional: 355, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 1207, unknown conditional: 0, unknown unconditional: 1207] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 32, Positive conditional cache size: 0, Positive unconditional cache size: 32, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 52 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 192 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 498.3s, OverallIterations: 45, TraceHistogramMax: 3, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 213.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 268 mSolverCounterUnknown, 8533 SdHoareTripleChecker+Valid, 92.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8533 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 87.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 587 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1970 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 39917 IncrementalHoareTripleChecker+Invalid, 42742 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1970 mSolverCounterUnsat, 0 mSDtfsCounter, 39917 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2392 GetRequests, 711 SyntacticMatches, 5 SemanticMatches, 1675 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 21328 ImplicationChecksByTransitivity, 138.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28417occurred in iteration=44, InterpolantAutomatonStates: 898, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 266.1s InterpolantComputationTime, 1797 NumberOfCodeBlocks, 1774 NumberOfCodeBlocksAsserted, 106 NumberOfCheckSat, 2269 ConstructedInterpolants, 132 QuantifiedInterpolants, 84183 SizeOfPredicates, 482 NumberOfNonLiveVariables, 8397 ConjunctsInSsa, 1107 ConjunctsInUnsatCore, 108 InterpolantComputations, 22 PerfectInterpolantSequences, 98/458 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown