/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 --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:10:20,290 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:10:20,349 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 12:10:20,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:10:20,376 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:10:20,376 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:10:20,377 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:10:20,377 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:10:20,377 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:10:20,378 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:10:20,378 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:10:20,378 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:10:20,379 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:10:20,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:10:20,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:10:20,379 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:10:20,380 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:10:20,380 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:10:20,380 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:10:20,381 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:10:20,381 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:10:20,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:10:20,382 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:10:20,382 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:10:20,382 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:10:20,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:10:20,383 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:10:20,383 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:10:20,383 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:10:20,384 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:10:20,384 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:10:20,384 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:10:20,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:10:20,589 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:10:20,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:10:20,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:10:20,624 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:10:20,624 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:10:20,625 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-17 12:10:21,888 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:10:22,067 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:10:22,068 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2023-11-17 12:10:22,079 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e826ae11c/0b25944052374f8fa9273223d28b7f43/FLAG5c3e26c99 [2023-11-17 12:10:22,097 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e826ae11c/0b25944052374f8fa9273223d28b7f43 [2023-11-17 12:10:22,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:10:22,100 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:10:22,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:10:22,103 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:10:22,106 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:10:22,107 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,108 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ff037c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22, skipping insertion in model container [2023-11-17 12:10:22,108 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,138 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:10:22,273 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-17 12:10:22,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:10:22,287 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:10:22,307 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4226,4239] [2023-11-17 12:10:22,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:10:22,316 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:10:22,317 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:10:22,322 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:10:22,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22 WrapperNode [2023-11-17 12:10:22,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:10:22,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:10:22,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:10:22,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:10:22,328 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,339 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,368 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 331 [2023-11-17 12:10:22,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:10:22,369 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:10:22,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:10:22,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:10:22,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,385 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,385 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,394 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,398 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,400 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,420 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:10:22,421 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:10:22,421 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:10:22,421 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:10:22,422 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (1/1) ... [2023-11-17 12:10:22,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:10:22,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:22,458 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 12:10:22,460 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 12:10:22,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:10:22,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:10:22,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:10:22,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:10:22,480 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:10:22,480 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:10:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:10:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 12:10:22,481 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:10:22,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 12:10:22,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:10:22,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:10:22,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:10:22,485 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 12:10:22,591 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:10:22,593 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:10:22,899 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:10:23,277 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:10:23,278 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 12:10:23,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:10:23 BoogieIcfgContainer [2023-11-17 12:10:23,279 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:10:23,280 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:10:23,280 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:10:23,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:10:23,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:10:22" (1/3) ... [2023-11-17 12:10:23,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efd58b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:10:23, skipping insertion in model container [2023-11-17 12:10:23,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:10:22" (2/3) ... [2023-11-17 12:10:23,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1efd58b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:10:23, skipping insertion in model container [2023-11-17 12:10:23,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:10:23" (3/3) ... [2023-11-17 12:10:23,284 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2023-11-17 12:10:23,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:10:23,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:10:23,299 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:10:23,353 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 12:10:23,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 51 transitions, 130 flow [2023-11-17 12:10:23,425 INFO L124 PetriNetUnfolderBase]: 6/47 cut-off events. [2023-11-17 12:10:23,425 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:10:23,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 47 events. 6/47 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-17 12:10:23,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 51 transitions, 130 flow [2023-11-17 12:10:23,431 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 46 transitions, 116 flow [2023-11-17 12:10:23,433 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:10:23,441 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 46 transitions, 116 flow [2023-11-17 12:10:23,443 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 53 places, 46 transitions, 116 flow [2023-11-17 12:10:23,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 46 transitions, 116 flow [2023-11-17 12:10:23,453 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2023-11-17 12:10:23,453 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:10:23,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 46 events. 6/46 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 75 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2023-11-17 12:10:23,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 768 [2023-11-17 12:10:24,292 INFO L134 LiptonReduction]: Checked pairs total: 967 [2023-11-17 12:10:24,293 INFO L136 LiptonReduction]: Total number of compositions: 11 [2023-11-17 12:10:24,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:10:24,313 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;@524b6062, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:10:24,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 12:10:24,326 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:10:24,326 INFO L124 PetriNetUnfolderBase]: 6/34 cut-off events. [2023-11-17 12:10:24,327 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:10:24,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:24,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:24,327 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 2 more)] === [2023-11-17 12:10:24,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash -293556732, now seen corresponding path program 1 times [2023-11-17 12:10:24,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:24,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124685288] [2023-11-17 12:10:24,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:24,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:24,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:24,841 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 12:10:24,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:24,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124685288] [2023-11-17 12:10:24,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124685288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:24,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:24,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:10:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094820729] [2023-11-17 12:10:24,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:24,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:10:24,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:10:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:10:24,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2023-11-17 12:10:24,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 12:10:24,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:24,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2023-11-17 12:10:24,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:25,307 INFO L124 PetriNetUnfolderBase]: 1945/2598 cut-off events. [2023-11-17 12:10:25,308 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-17 12:10:25,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5377 conditions, 2598 events. 1945/2598 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9600 event pairs, 199 based on Foata normal form. 0/1986 useless extension candidates. Maximal degree in co-relation 5088. Up to 1645 conditions per place. [2023-11-17 12:10:25,324 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 65 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2023-11-17 12:10:25,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 70 transitions, 320 flow [2023-11-17 12:10:25,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:10:25,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:10:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2023-11-17 12:10:25,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4838709677419355 [2023-11-17 12:10:25,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 150 transitions. [2023-11-17 12:10:25,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 150 transitions. [2023-11-17 12:10:25,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:25,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 150 transitions. [2023-11-17 12:10:25,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 30.0) internal successors, (150), 5 states have internal predecessors, (150), 0 states have call successors, (0), 0 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 12:10:25,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 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 12:10:25,355 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 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 12:10:25,356 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 94 flow. Second operand 5 states and 150 transitions. [2023-11-17 12:10:25,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 70 transitions, 320 flow [2023-11-17 12:10:25,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 70 transitions, 292 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 12:10:25,363 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 94 flow [2023-11-17 12:10:25,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2023-11-17 12:10:25,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-11-17 12:10:25,368 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 94 flow [2023-11-17 12:10:25,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 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 12:10:25,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:25,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:25,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:10:25,369 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 2 more)] === [2023-11-17 12:10:25,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:25,370 INFO L85 PathProgramCache]: Analyzing trace with hash 184686255, now seen corresponding path program 1 times [2023-11-17 12:10:25,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:25,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016518239] [2023-11-17 12:10:25,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:25,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:10:25,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:25,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016518239] [2023-11-17 12:10:25,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016518239] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:25,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:25,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:10:25,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153937681] [2023-11-17 12:10:25,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:25,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:10:25,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:25,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:10:25,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:10:25,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2023-11-17 12:10:25,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 12:10:25,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:25,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2023-11-17 12:10:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:25,796 INFO L124 PetriNetUnfolderBase]: 2385/3237 cut-off events. [2023-11-17 12:10:25,797 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-11-17 12:10:25,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7143 conditions, 3237 events. 2385/3237 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11508 event pairs, 1822 based on Foata normal form. 98/2623 useless extension candidates. Maximal degree in co-relation 3192. Up to 2423 conditions per place. [2023-11-17 12:10:25,809 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 33 selfloop transitions, 2 changer transitions 20/57 dead transitions. [2023-11-17 12:10:25,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 255 flow [2023-11-17 12:10:25,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:10:25,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:10:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2023-11-17 12:10:25,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645161290322581 [2023-11-17 12:10:25,810 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 140 transitions. [2023-11-17 12:10:25,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 140 transitions. [2023-11-17 12:10:25,810 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:25,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 140 transitions. [2023-11-17 12:10:25,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 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 12:10:25,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 12:10:25,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 62.0) internal successors, (310), 5 states have internal predecessors, (310), 0 states have call successors, (0), 0 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 12:10:25,812 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 94 flow. Second operand 4 states and 140 transitions. [2023-11-17 12:10:25,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 255 flow [2023-11-17 12:10:25,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 57 transitions, 244 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 12:10:25,813 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 102 flow [2023-11-17 12:10:25,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-17 12:10:25,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-11-17 12:10:25,814 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 102 flow [2023-11-17 12:10:25,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 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 12:10:25,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:25,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:25,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:10:25,815 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 2 more)] === [2023-11-17 12:10:25,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:25,815 INFO L85 PathProgramCache]: Analyzing trace with hash 475232790, now seen corresponding path program 1 times [2023-11-17 12:10:25,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:25,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016611404] [2023-11-17 12:10:25,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:25,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:10:25,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:25,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016611404] [2023-11-17 12:10:25,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016611404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:25,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:25,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:10:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056025365] [2023-11-17 12:10:25,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:25,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:10:25,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:25,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:10:25,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:10:25,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2023-11-17 12:10:25,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 12:10:25,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:25,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2023-11-17 12:10:25,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:26,440 INFO L124 PetriNetUnfolderBase]: 3667/4883 cut-off events. [2023-11-17 12:10:26,440 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2023-11-17 12:10:26,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10978 conditions, 4883 events. 3667/4883 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19330 event pairs, 987 based on Foata normal form. 92/4045 useless extension candidates. Maximal degree in co-relation 10965. Up to 2128 conditions per place. [2023-11-17 12:10:26,467 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 87 selfloop transitions, 9 changer transitions 0/97 dead transitions. [2023-11-17 12:10:26,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 97 transitions, 443 flow [2023-11-17 12:10:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:10:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:10:26,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 203 transitions. [2023-11-17 12:10:26,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456989247311828 [2023-11-17 12:10:26,471 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 203 transitions. [2023-11-17 12:10:26,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 203 transitions. [2023-11-17 12:10:26,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:26,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 203 transitions. [2023-11-17 12:10:26,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.833333333333336) internal successors, (203), 6 states have internal predecessors, (203), 0 states have call successors, (0), 0 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 12:10:26,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 12:10:26,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 12:10:26,474 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 102 flow. Second operand 6 states and 203 transitions. [2023-11-17 12:10:26,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 97 transitions, 443 flow [2023-11-17 12:10:26,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 97 transitions, 439 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:10:26,479 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 169 flow [2023-11-17 12:10:26,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=169, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-11-17 12:10:26,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2023-11-17 12:10:26,480 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 169 flow [2023-11-17 12:10:26,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 0 states have call successors, (0), 0 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 12:10:26,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:26,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:26,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:10:26,481 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 2 more)] === [2023-11-17 12:10:26,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:26,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1263226006, now seen corresponding path program 2 times [2023-11-17 12:10:26,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:26,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59061010] [2023-11-17 12:10:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:26,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:10:26,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:26,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59061010] [2023-11-17 12:10:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59061010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:10:26,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:10:26,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 12:10:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729510577] [2023-11-17 12:10:26,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:10:26,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:10:26,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:10:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:10:26,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2023-11-17 12:10:26,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 12:10:26,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:26,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2023-11-17 12:10:26,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:27,558 INFO L124 PetriNetUnfolderBase]: 4771/6383 cut-off events. [2023-11-17 12:10:27,558 INFO L125 PetriNetUnfolderBase]: For 4689/4689 co-relation queries the response was YES. [2023-11-17 12:10:27,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18327 conditions, 6383 events. 4771/6383 cut-off events. For 4689/4689 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 26239 event pairs, 563 based on Foata normal form. 152/5706 useless extension candidates. Maximal degree in co-relation 18306. Up to 4755 conditions per place. [2023-11-17 12:10:27,616 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 83 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2023-11-17 12:10:27,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 92 transitions, 510 flow [2023-11-17 12:10:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:10:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:10:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2023-11-17 12:10:27,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478494623655914 [2023-11-17 12:10:27,618 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 178 transitions. [2023-11-17 12:10:27,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 178 transitions. [2023-11-17 12:10:27,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:27,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 178 transitions. [2023-11-17 12:10:27,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 29.666666666666668) internal successors, (178), 6 states have internal predecessors, (178), 0 states have call successors, (0), 0 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 12:10:27,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 12:10:27,620 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 12:10:27,620 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 169 flow. Second operand 6 states and 178 transitions. [2023-11-17 12:10:27,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 92 transitions, 510 flow [2023-11-17 12:10:27,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 92 transitions, 491 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 12:10:27,632 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 228 flow [2023-11-17 12:10:27,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-11-17 12:10:27,633 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2023-11-17 12:10:27,633 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 228 flow [2023-11-17 12:10:27,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 12:10:27,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:27,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:27,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:10:27,634 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 2 more)] === [2023-11-17 12:10:27,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:27,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1014460669, now seen corresponding path program 1 times [2023-11-17 12:10:27,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:27,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459520064] [2023-11-17 12:10:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:29,448 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 12:10:29,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459520064] [2023-11-17 12:10:29,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459520064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:29,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639158860] [2023-11-17 12:10:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:29,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:29,476 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 12:10:29,542 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 12:10:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:29,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-17 12:10:29,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:30,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-17 12:10:30,035 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 12:10:30,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:30,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:30,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2023-11-17 12:10:30,335 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 12:10:30,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639158860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:30,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:30,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2023-11-17 12:10:30,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614657279] [2023-11-17 12:10:30,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:30,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:10:30,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:10:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:10:30,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-17 12:10:30,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 228 flow. Second operand has 21 states, 21 states have (on average 22.476190476190474) internal successors, (472), 21 states have internal predecessors, (472), 0 states have call successors, (0), 0 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 12:10:30,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:30,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-17 12:10:30,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:34,117 INFO L124 PetriNetUnfolderBase]: 17479/23142 cut-off events. [2023-11-17 12:10:34,118 INFO L125 PetriNetUnfolderBase]: For 24388/24388 co-relation queries the response was YES. [2023-11-17 12:10:34,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68806 conditions, 23142 events. 17479/23142 cut-off events. For 24388/24388 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 110859 event pairs, 1333 based on Foata normal form. 52/19916 useless extension candidates. Maximal degree in co-relation 35313. Up to 6633 conditions per place. [2023-11-17 12:10:34,321 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 307 selfloop transitions, 55 changer transitions 3/366 dead transitions. [2023-11-17 12:10:34,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 366 transitions, 2108 flow [2023-11-17 12:10:34,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:10:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:10:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 692 transitions. [2023-11-17 12:10:34,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5874363327674024 [2023-11-17 12:10:34,325 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 692 transitions. [2023-11-17 12:10:34,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 692 transitions. [2023-11-17 12:10:34,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:34,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 692 transitions. [2023-11-17 12:10:34,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 36.421052631578945) internal successors, (692), 19 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 12:10:34,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 62.0) internal successors, (1240), 20 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 12:10:34,331 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 62.0) internal successors, (1240), 20 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 12:10:34,331 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 228 flow. Second operand 19 states and 692 transitions. [2023-11-17 12:10:34,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 366 transitions, 2108 flow [2023-11-17 12:10:34,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 366 transitions, 2083 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-11-17 12:10:34,425 INFO L231 Difference]: Finished difference. Result has 79 places, 103 transitions, 704 flow [2023-11-17 12:10:34,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=103} [2023-11-17 12:10:34,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2023-11-17 12:10:34,428 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 103 transitions, 704 flow [2023-11-17 12:10:34,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.476190476190474) internal successors, (472), 21 states have internal predecessors, (472), 0 states have call successors, (0), 0 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 12:10:34,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:34,429 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:34,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:10:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:34,636 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 2 more)] === [2023-11-17 12:10:34,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash 477638780, now seen corresponding path program 2 times [2023-11-17 12:10:34,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217589756] [2023-11-17 12:10:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:35,573 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 12:10:35,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217589756] [2023-11-17 12:10:35,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217589756] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:35,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337689222] [2023-11-17 12:10:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:10:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:35,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:35,574 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 12:10:35,603 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 12:10:35,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:10:35,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:10:35,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 12:10:35,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:35,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:10:35,912 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 12:10:35,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:10:35,958 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 12:10:35,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:36,013 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_177 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_177) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-11-17 12:10:36,034 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:36,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-11-17 12:10:36,053 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 11 treesize of output 5 [2023-11-17 12:10:36,160 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 12:10:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337689222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:36,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:36,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 19 [2023-11-17 12:10:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002344447] [2023-11-17 12:10:36,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:36,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:10:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:10:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=323, Unknown=1, NotChecked=36, Total=420 [2023-11-17 12:10:36,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-17 12:10:36,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 103 transitions, 704 flow. Second operand has 21 states, 21 states have (on average 22.38095238095238) internal successors, (470), 21 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 12:10:36,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:36,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-17 12:10:36,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:39,386 INFO L124 PetriNetUnfolderBase]: 22577/29953 cut-off events. [2023-11-17 12:10:39,386 INFO L125 PetriNetUnfolderBase]: For 43700/43700 co-relation queries the response was YES. [2023-11-17 12:10:39,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96704 conditions, 29953 events. 22577/29953 cut-off events. For 43700/43700 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 148925 event pairs, 2505 based on Foata normal form. 98/27868 useless extension candidates. Maximal degree in co-relation 86718. Up to 18183 conditions per place. [2023-11-17 12:10:39,561 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 163 selfloop transitions, 49 changer transitions 1/214 dead transitions. [2023-11-17 12:10:39,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 214 transitions, 1628 flow [2023-11-17 12:10:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:10:39,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:10:39,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 363 transitions. [2023-11-17 12:10:39,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879032258064516 [2023-11-17 12:10:39,563 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 363 transitions. [2023-11-17 12:10:39,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 363 transitions. [2023-11-17 12:10:39,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:39,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 363 transitions. [2023-11-17 12:10:39,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 30.25) internal successors, (363), 12 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 12:10:39,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 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 12:10:39,565 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 62.0) internal successors, (806), 13 states have internal predecessors, (806), 0 states have call successors, (0), 0 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 12:10:39,565 INFO L175 Difference]: Start difference. First operand has 79 places, 103 transitions, 704 flow. Second operand 12 states and 363 transitions. [2023-11-17 12:10:39,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 214 transitions, 1628 flow [2023-11-17 12:10:39,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 214 transitions, 1609 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 12:10:39,695 INFO L231 Difference]: Finished difference. Result has 91 places, 126 transitions, 1018 flow [2023-11-17 12:10:39,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=661, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1018, PETRI_PLACES=91, PETRI_TRANSITIONS=126} [2023-11-17 12:10:39,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2023-11-17 12:10:39,696 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 126 transitions, 1018 flow [2023-11-17 12:10:39,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.38095238095238) internal successors, (470), 21 states have internal predecessors, (470), 0 states have call successors, (0), 0 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 12:10:39,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:39,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:39,704 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 12:10:39,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 12:10:39,904 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 2 more)] === [2023-11-17 12:10:39,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash 131163532, now seen corresponding path program 3 times [2023-11-17 12:10:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:39,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942588480] [2023-11-17 12:10:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:41,137 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 12:10:41,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942588480] [2023-11-17 12:10:41,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942588480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:41,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61784626] [2023-11-17 12:10:41,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:10:41,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:41,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:41,155 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 12:10:41,195 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 12:10:41,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:10:41,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:10:41,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 12:10:41,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:10:41,492 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 12:10:41,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 12:10:41,519 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 12:10:41,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-17 12:10:41,558 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 12:10:41,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:43,647 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_227 (Array Int Int)) (v_ArrVal_226 (Array Int Int))) (< 0 (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_226) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_227) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)) c_~total~0))) is different from false [2023-11-17 12:10:43,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:43,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-11-17 12:10:43,689 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 31 treesize of output 25 [2023-11-17 12:10:43,710 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 32 treesize of output 20 [2023-11-17 12:10:43,964 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 12:10:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61784626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:43,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-17 12:10:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095846588] [2023-11-17 12:10:43,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:43,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 12:10:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 12:10:43,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=4, NotChecked=38, Total=462 [2023-11-17 12:10:43,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-17 12:10:43,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 126 transitions, 1018 flow. Second operand has 22 states, 22 states have (on average 22.727272727272727) internal successors, (500), 22 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 12:10:43,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:43,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-17 12:10:43,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:49,627 INFO L124 PetriNetUnfolderBase]: 28539/37831 cut-off events. [2023-11-17 12:10:49,627 INFO L125 PetriNetUnfolderBase]: For 73899/73899 co-relation queries the response was YES. [2023-11-17 12:10:49,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128934 conditions, 37831 events. 28539/37831 cut-off events. For 73899/73899 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 192792 event pairs, 4203 based on Foata normal form. 2/35076 useless extension candidates. Maximal degree in co-relation 110846. Up to 19143 conditions per place. [2023-11-17 12:10:50,031 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 184 selfloop transitions, 69 changer transitions 1/255 dead transitions. [2023-11-17 12:10:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 255 transitions, 2147 flow [2023-11-17 12:10:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:10:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:10:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 401 transitions. [2023-11-17 12:10:50,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975186104218362 [2023-11-17 12:10:50,034 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 401 transitions. [2023-11-17 12:10:50,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 401 transitions. [2023-11-17 12:10:50,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:50,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 401 transitions. [2023-11-17 12:10:50,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 30.846153846153847) internal successors, (401), 13 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 12:10:50,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 12:10:50,036 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 62.0) internal successors, (868), 14 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 12:10:50,036 INFO L175 Difference]: Start difference. First operand has 91 places, 126 transitions, 1018 flow. Second operand 13 states and 401 transitions. [2023-11-17 12:10:50,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 255 transitions, 2147 flow [2023-11-17 12:10:50,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 255 transitions, 2100 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 12:10:50,405 INFO L231 Difference]: Finished difference. Result has 101 places, 148 transitions, 1373 flow [2023-11-17 12:10:50,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1373, PETRI_PLACES=101, PETRI_TRANSITIONS=148} [2023-11-17 12:10:50,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2023-11-17 12:10:50,406 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 148 transitions, 1373 flow [2023-11-17 12:10:50,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 22.727272727272727) internal successors, (500), 22 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 12:10:50,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:10:50,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:10:50,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 12:10:50,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:50,613 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 2 more)] === [2023-11-17 12:10:50,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:10:50,613 INFO L85 PathProgramCache]: Analyzing trace with hash -727746380, now seen corresponding path program 4 times [2023-11-17 12:10:50,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:10:50,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171897595] [2023-11-17 12:10:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:10:50,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:10:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:10:51,593 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 12:10:51,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:10:51,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171897595] [2023-11-17 12:10:51,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171897595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:10:51,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100933285] [2023-11-17 12:10:51,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:10:51,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:10:51,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:10:51,594 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 12:10:51,616 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 12:10:51,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:10:51,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:10:51,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 12:10:51,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:10:51,799 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 104 treesize of output 96 [2023-11-17 12:10:52,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-17 12:10:52,116 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 21 treesize of output 16 [2023-11-17 12:10:52,204 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 21 treesize of output 16 [2023-11-17 12:10:52,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2023-11-17 12:10:52,288 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 12:10:52,288 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:10:52,590 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:10:52,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 341 treesize of output 325 [2023-11-17 12:10:52,598 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 78 treesize of output 72 [2023-11-17 12:10:52,603 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 146 treesize of output 134 [2023-11-17 12:10:52,607 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 134 treesize of output 110 [2023-11-17 12:10:52,872 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 12:10:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100933285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:10:52,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:10:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2023-11-17 12:10:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641299693] [2023-11-17 12:10:52,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:10:52,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:10:52,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:10:52,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:10:52,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=634, Unknown=3, NotChecked=0, Total=756 [2023-11-17 12:10:52,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-17 12:10:52,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 148 transitions, 1373 flow. Second operand has 28 states, 28 states have (on average 21.571428571428573) internal successors, (604), 28 states have internal predecessors, (604), 0 states have call successors, (0), 0 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 12:10:52,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:10:52,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-17 12:10:52,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:56,240 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 12:11:09,417 INFO L124 PetriNetUnfolderBase]: 91782/121582 cut-off events. [2023-11-17 12:11:09,418 INFO L125 PetriNetUnfolderBase]: For 308533/308533 co-relation queries the response was YES. [2023-11-17 12:11:10,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 430106 conditions, 121582 events. 91782/121582 cut-off events. For 308533/308533 co-relation queries the response was YES. Maximal size of possible extension queue 3401. Compared 725745 event pairs, 7836 based on Foata normal form. 11/112709 useless extension candidates. Maximal degree in co-relation 380530. Up to 37202 conditions per place. [2023-11-17 12:11:10,848 INFO L140 encePairwiseOnDemand]: 50/62 looper letters, 434 selfloop transitions, 264 changer transitions 5/704 dead transitions. [2023-11-17 12:11:10,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 704 transitions, 6559 flow [2023-11-17 12:11:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:11:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:11:10,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 904 transitions. [2023-11-17 12:11:10,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400238948626045 [2023-11-17 12:11:10,852 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 904 transitions. [2023-11-17 12:11:10,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 904 transitions. [2023-11-17 12:11:10,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:10,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 904 transitions. [2023-11-17 12:11:10,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 33.48148148148148) internal successors, (904), 27 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:11:10,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 62.0) internal successors, (1736), 28 states have internal predecessors, (1736), 0 states have call successors, (0), 0 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 12:11:10,858 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 62.0) internal successors, (1736), 28 states have internal predecessors, (1736), 0 states have call successors, (0), 0 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 12:11:10,858 INFO L175 Difference]: Start difference. First operand has 101 places, 148 transitions, 1373 flow. Second operand 27 states and 904 transitions. [2023-11-17 12:11:10,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 704 transitions, 6559 flow [2023-11-17 12:11:14,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 704 transitions, 6396 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 12:11:14,009 INFO L231 Difference]: Finished difference. Result has 132 places, 369 transitions, 4635 flow [2023-11-17 12:11:14,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4635, PETRI_PLACES=132, PETRI_TRANSITIONS=369} [2023-11-17 12:11:14,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2023-11-17 12:11:14,009 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 369 transitions, 4635 flow [2023-11-17 12:11:14,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 21.571428571428573) internal successors, (604), 28 states have internal predecessors, (604), 0 states have call successors, (0), 0 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 12:11:14,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:14,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:14,028 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 12:11:14,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:14,216 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 2 more)] === [2023-11-17 12:11:14,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 97059286, now seen corresponding path program 1 times [2023-11-17 12:11:14,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:14,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830568542] [2023-11-17 12:11:14,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:14,281 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 12:11:14,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:14,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830568542] [2023-11-17 12:11:14,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830568542] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:11:14,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:11:14,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:11:14,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68309690] [2023-11-17 12:11:14,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:11:14,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:11:14,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:14,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:11:14,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:11:14,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 62 [2023-11-17 12:11:14,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 369 transitions, 4635 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 12:11:14,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:14,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 62 [2023-11-17 12:11:14,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:11:35,705 INFO L124 PetriNetUnfolderBase]: 121399/165417 cut-off events. [2023-11-17 12:11:35,706 INFO L125 PetriNetUnfolderBase]: For 1137178/1143575 co-relation queries the response was YES. [2023-11-17 12:11:37,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687925 conditions, 165417 events. 121399/165417 cut-off events. For 1137178/1143575 co-relation queries the response was YES. Maximal size of possible extension queue 5486. Compared 1139644 event pairs, 46408 based on Foata normal form. 8631/157814 useless extension candidates. Maximal degree in co-relation 634075. Up to 82468 conditions per place. [2023-11-17 12:11:38,001 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 589 selfloop transitions, 5 changer transitions 0/599 dead transitions. [2023-11-17 12:11:38,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 599 transitions, 9114 flow [2023-11-17 12:11:38,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:11:38,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:11:38,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 115 transitions. [2023-11-17 12:11:38,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6182795698924731 [2023-11-17 12:11:38,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 115 transitions. [2023-11-17 12:11:38,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 115 transitions. [2023-11-17 12:11:38,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:11:38,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 115 transitions. [2023-11-17 12:11:38,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 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 12:11:38,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 12:11:38,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 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 12:11:38,003 INFO L175 Difference]: Start difference. First operand has 132 places, 369 transitions, 4635 flow. Second operand 3 states and 115 transitions. [2023-11-17 12:11:38,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 599 transitions, 9114 flow [2023-11-17 12:11:50,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 599 transitions, 8932 flow, removed 75 selfloop flow, removed 8 redundant places. [2023-11-17 12:11:50,601 INFO L231 Difference]: Finished difference. Result has 127 places, 370 transitions, 4714 flow [2023-11-17 12:11:50,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4714, PETRI_PLACES=127, PETRI_TRANSITIONS=370} [2023-11-17 12:11:50,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2023-11-17 12:11:50,602 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 370 transitions, 4714 flow [2023-11-17 12:11:50,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 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 12:11:50,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:11:50,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:11:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 12:11:50,603 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 2 more)] === [2023-11-17 12:11:50,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:11:50,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2084254572, now seen corresponding path program 5 times [2023-11-17 12:11:50,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:11:50,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908166283] [2023-11-17 12:11:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:11:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:11:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:11:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:50,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:11:50,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908166283] [2023-11-17 12:11:50,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908166283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:11:50,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799088003] [2023-11-17 12:11:50,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:11:50,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:11:50,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:11:50,766 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 12:11:50,774 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 12:11:50,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:11:50,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:11:50,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:11:50,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:11:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:51,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:11:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:11:51,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799088003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:11:51,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:11:51,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-11-17 12:11:51,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453289654] [2023-11-17 12:11:51,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:11:51,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:11:51,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:11:51,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:11:51,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:11:51,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2023-11-17 12:11:51,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 370 transitions, 4714 flow. Second operand has 18 states, 18 states have (on average 20.11111111111111) internal successors, (362), 18 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 12:11:51,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:11:51,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2023-11-17 12:11:51,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand