/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 02:27:27,901 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 02:27:27,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 02:27:27,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 02:27:27,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 02:27:27,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 02:27:27,971 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 02:27:27,972 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 02:27:27,972 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 02:27:27,973 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 02:27:27,973 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 02:27:27,974 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 02:27:27,974 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 02:27:27,974 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 02:27:27,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 02:27:27,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 02:27:27,975 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 02:27:27,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 02:27:27,976 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 02:27:27,976 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 02:27:27,976 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 02:27:27,977 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 02:27:27,977 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 02:27:27,977 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 02:27:27,978 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 02:27:27,978 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 02:27:27,978 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 02:27:27,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:27:27,979 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 02:27:27,979 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 02:27:27,979 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 02:27:27,980 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 02:27:27,980 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 02:27:27,980 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 02:27:27,980 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 02:27:27,981 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 02:27:28,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 02:27:28,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 02:27:28,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 02:27:28,328 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 02:27:28,329 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 02:27:28,333 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-24 02:27:29,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 02:27:29,783 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 02:27:29,783 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-horseshoe.wvr.c [2023-08-24 02:27:29,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08c072090/ce35bd870d414fbc9afbbcfe621227b2/FLAGef35241d6 [2023-08-24 02:27:29,805 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08c072090/ce35bd870d414fbc9afbbcfe621227b2 [2023-08-24 02:27:29,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 02:27:29,808 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 02:27:29,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 02:27:29,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 02:27:29,811 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 02:27:29,812 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:27:29" (1/1) ... [2023-08-24 02:27:29,813 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b2a482a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:29, skipping insertion in model container [2023-08-24 02:27:29,813 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 02:27:29" (1/1) ... [2023-08-24 02:27:29,832 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 02:27:30,019 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-horseshoe.wvr.c[3424,3437] [2023-08-24 02:27:30,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:27:30,039 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 02:27:30,074 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-horseshoe.wvr.c[3424,3437] [2023-08-24 02:27:30,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 02:27:30,085 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:27:30,085 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 02:27:30,091 INFO L206 MainTranslator]: Completed translation [2023-08-24 02:27:30,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30 WrapperNode [2023-08-24 02:27:30,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 02:27:30,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 02:27:30,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 02:27:30,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 02:27:30,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,158 INFO L138 Inliner]: procedures = 25, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 255 [2023-08-24 02:27:30,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 02:27:30,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 02:27:30,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 02:27:30,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 02:27:30,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,181 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,181 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,207 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 02:27:30,208 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 02:27:30,208 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 02:27:30,208 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 02:27:30,209 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (1/1) ... [2023-08-24 02:27:30,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 02:27:30,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:30,235 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 02:27:30,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 02:27:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 02:27:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 02:27:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 02:27:30,264 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 02:27:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 02:27:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 02:27:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 02:27:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 02:27:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 02:27:30,265 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 02:27:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 02:27:30,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 02:27:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 02:27:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 02:27:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 02:27:30,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 02:27:30,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 02:27:30,267 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 02:27:30,387 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 02:27:30,389 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 02:27:30,780 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 02:27:30,887 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 02:27:30,887 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-24 02:27:30,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:27:30 BoogieIcfgContainer [2023-08-24 02:27:30,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 02:27:30,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 02:27:30,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 02:27:30,895 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 02:27:30,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 02:27:29" (1/3) ... [2023-08-24 02:27:30,896 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea73919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:27:30, skipping insertion in model container [2023-08-24 02:27:30,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 02:27:30" (2/3) ... [2023-08-24 02:27:30,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ea73919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 02:27:30, skipping insertion in model container [2023-08-24 02:27:30,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 02:27:30" (3/3) ... [2023-08-24 02:27:30,898 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-08-24 02:27:30,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 02:27:30,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 02:27:30,916 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 02:27:31,035 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 02:27:31,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 204 transitions, 432 flow [2023-08-24 02:27:31,148 INFO L124 PetriNetUnfolderBase]: 18/201 cut-off events. [2023-08-24 02:27:31,149 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 02:27:31,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 118 event pairs, 0 based on Foata normal form. 0/182 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2023-08-24 02:27:31,154 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 204 transitions, 432 flow [2023-08-24 02:27:31,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 191 transitions, 400 flow [2023-08-24 02:27:31,168 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 02:27:31,176 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 191 transitions, 400 flow [2023-08-24 02:27:31,178 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 191 transitions, 400 flow [2023-08-24 02:27:31,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 191 transitions, 400 flow [2023-08-24 02:27:31,229 INFO L124 PetriNetUnfolderBase]: 18/191 cut-off events. [2023-08-24 02:27:31,229 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 02:27:31,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 191 events. 18/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 117 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 165. Up to 3 conditions per place. [2023-08-24 02:27:31,232 INFO L119 LiptonReduction]: Number of co-enabled transitions 1528 [2023-08-24 02:27:37,500 INFO L134 LiptonReduction]: Checked pairs total: 2401 [2023-08-24 02:27:37,500 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-24 02:27:37,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 02:27:37,520 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2e03782f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 02:27:37,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 02:27:37,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 02:27:37,527 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 02:27:37,527 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 02:27:37,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:37,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:37,528 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:37,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1503097758, now seen corresponding path program 1 times [2023-08-24 02:27:37,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:37,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512788254] [2023-08-24 02:27:37,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:37,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:37,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:37,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512788254] [2023-08-24 02:27:37,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512788254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:27:37,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:27:37,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 02:27:37,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718069955] [2023-08-24 02:27:37,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:27:37,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-24 02:27:37,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:37,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-24 02:27:37,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-24 02:27:37,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 407 [2023-08-24 02:27:37,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:37,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:37,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 407 [2023-08-24 02:27:37,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:37,966 INFO L124 PetriNetUnfolderBase]: 324/461 cut-off events. [2023-08-24 02:27:37,966 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-24 02:27:37,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 966 conditions, 461 events. 324/461 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1461 event pairs, 167 based on Foata normal form. 0/305 useless extension candidates. Maximal degree in co-relation 739. Up to 453 conditions per place. [2023-08-24 02:27:37,975 INFO L140 encePairwiseOnDemand]: 406/407 looper letters, 24 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-24 02:27:37,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 120 flow [2023-08-24 02:27:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-24 02:27:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-24 02:27:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 383 transitions. [2023-08-24 02:27:37,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4705159705159705 [2023-08-24 02:27:37,997 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 383 transitions. [2023-08-24 02:27:37,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 383 transitions. [2023-08-24 02:27:38,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:38,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 383 transitions. [2023-08-24 02:27:38,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 191.5) internal successors, (383), 2 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,011 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 407.0) internal successors, (1221), 3 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,013 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 383 transitions. [2023-08-24 02:27:38,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 120 flow [2023-08-24 02:27:38,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-24 02:27:38,020 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-08-24 02:27:38,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 02:27:38,025 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-08-24 02:27:38,025 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-08-24 02:27:38,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 188.0) internal successors, (376), 2 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:38,026 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] [2023-08-24 02:27:38,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 02:27:38,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:38,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:38,035 INFO L85 PathProgramCache]: Analyzing trace with hash 650337903, now seen corresponding path program 1 times [2023-08-24 02:27:38,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:38,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315460426] [2023-08-24 02:27:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:38,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:38,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315460426] [2023-08-24 02:27:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315460426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:27:38,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:27:38,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 02:27:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512602358] [2023-08-24 02:27:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:27:38,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 02:27:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 02:27:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 02:27:38,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 407 [2023-08-24 02:27:38,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:38,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 407 [2023-08-24 02:27:38,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:38,487 INFO L124 PetriNetUnfolderBase]: 326/478 cut-off events. [2023-08-24 02:27:38,487 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 02:27:38,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 478 events. 326/478 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1526 event pairs, 167 based on Foata normal form. 14/335 useless extension candidates. Maximal degree in co-relation 962. Up to 449 conditions per place. [2023-08-24 02:27:38,490 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 23 selfloop transitions, 2 changer transitions 11/39 dead transitions. [2023-08-24 02:27:38,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 159 flow [2023-08-24 02:27:38,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:27:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:27:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 647 transitions. [2023-08-24 02:27:38,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974201474201474 [2023-08-24 02:27:38,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 647 transitions. [2023-08-24 02:27:38,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 647 transitions. [2023-08-24 02:27:38,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:38,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 647 transitions. [2023-08-24 02:27:38,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.75) internal successors, (647), 4 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,501 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,501 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 4 states and 647 transitions. [2023-08-24 02:27:38,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 159 flow [2023-08-24 02:27:38,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 39 transitions, 159 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 02:27:38,504 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 78 flow [2023-08-24 02:27:38,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2023-08-24 02:27:38,505 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-24 02:27:38,506 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 78 flow [2023-08-24 02:27:38,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.75) internal successors, (627), 4 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:38,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:38,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 02:27:38,515 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:38,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:38,517 INFO L85 PathProgramCache]: Analyzing trace with hash -882881433, now seen corresponding path program 1 times [2023-08-24 02:27:38,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65518738] [2023-08-24 02:27:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:27:38,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65518738] [2023-08-24 02:27:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65518738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:27:38,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:27:38,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 02:27:38,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32876855] [2023-08-24 02:27:38,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:27:38,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 02:27:38,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:38,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 02:27:38,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 02:27:38,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 407 [2023-08-24 02:27:38,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:38,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 407 [2023-08-24 02:27:38,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:38,872 INFO L124 PetriNetUnfolderBase]: 368/550 cut-off events. [2023-08-24 02:27:38,873 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-24 02:27:38,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346 conditions, 550 events. 368/550 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1969 event pairs, 194 based on Foata normal form. 30/405 useless extension candidates. Maximal degree in co-relation 1340. Up to 447 conditions per place. [2023-08-24 02:27:38,877 INFO L140 encePairwiseOnDemand]: 399/407 looper letters, 23 selfloop transitions, 3 changer transitions 12/41 dead transitions. [2023-08-24 02:27:38,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 41 transitions, 190 flow [2023-08-24 02:27:38,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:27:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:27:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 649 transitions. [2023-08-24 02:27:38,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39864864864864863 [2023-08-24 02:27:38,880 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 649 transitions. [2023-08-24 02:27:38,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 649 transitions. [2023-08-24 02:27:38,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:38,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 649 transitions. [2023-08-24 02:27:38,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.25) internal successors, (649), 4 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,886 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,886 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 78 flow. Second operand 4 states and 649 transitions. [2023-08-24 02:27:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 41 transitions, 190 flow [2023-08-24 02:27:38,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 41 transitions, 186 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 02:27:38,888 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 98 flow [2023-08-24 02:27:38,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-24 02:27:38,890 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-24 02:27:38,893 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 98 flow [2023-08-24 02:27:38,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:38,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:38,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:38,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 02:27:38,894 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:38,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:38,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1459056327, now seen corresponding path program 1 times [2023-08-24 02:27:38,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:38,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810005916] [2023-08-24 02:27:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:38,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:39,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:27:39,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:39,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810005916] [2023-08-24 02:27:39,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810005916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:27:39,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:27:39,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 02:27:39,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865614701] [2023-08-24 02:27:39,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:27:39,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 02:27:39,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:39,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 02:27:39,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 02:27:39,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 02:27:39,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:39,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:39,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 02:27:39,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:39,244 INFO L124 PetriNetUnfolderBase]: 340/485 cut-off events. [2023-08-24 02:27:39,245 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-24 02:27:39,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 485 events. 340/485 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1431 event pairs, 48 based on Foata normal form. 16/334 useless extension candidates. Maximal degree in co-relation 1360. Up to 390 conditions per place. [2023-08-24 02:27:39,248 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 33 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-24 02:27:39,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 202 flow [2023-08-24 02:27:39,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 02:27:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 02:27:39,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 561 transitions. [2023-08-24 02:27:39,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2023-08-24 02:27:39,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 561 transitions. [2023-08-24 02:27:39,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 561 transitions. [2023-08-24 02:27:39,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:39,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 561 transitions. [2023-08-24 02:27:39,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:39,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:39,255 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 407.0) internal successors, (1628), 4 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:39,255 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 98 flow. Second operand 3 states and 561 transitions. [2023-08-24 02:27:39,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 202 flow [2023-08-24 02:27:39,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 196 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 02:27:39,257 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 117 flow [2023-08-24 02:27:39,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-24 02:27:39,258 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-24 02:27:39,258 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 117 flow [2023-08-24 02:27:39,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:39,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:39,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:39,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 02:27:39,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:39,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1982199621, now seen corresponding path program 2 times [2023-08-24 02:27:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:39,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250995997] [2023-08-24 02:27:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:39,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250995997] [2023-08-24 02:27:40,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250995997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:27:40,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604125577] [2023-08-24 02:27:40,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:27:40,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:40,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:27:40,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 02:27:41,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 02:27:41,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:27:41,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 02:27:41,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:27:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:27:41,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:27:41,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-08-24 02:27:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:27:41,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 02:27:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604125577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:27:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 02:27:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-24 02:27:41,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429881475] [2023-08-24 02:27:41,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:27:41,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 02:27:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:41,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 02:27:41,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:27:41,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 407 [2023-08-24 02:27:41,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 117 flow. Second operand has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:41,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:41,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 407 [2023-08-24 02:27:41,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:41,913 INFO L124 PetriNetUnfolderBase]: 288/451 cut-off events. [2023-08-24 02:27:41,914 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2023-08-24 02:27:41,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 451 events. 288/451 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1372 event pairs, 35 based on Foata normal form. 5/328 useless extension candidates. Maximal degree in co-relation 1418. Up to 366 conditions per place. [2023-08-24 02:27:41,917 INFO L140 encePairwiseOnDemand]: 396/407 looper letters, 45 selfloop transitions, 9 changer transitions 13/69 dead transitions. [2023-08-24 02:27:41,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 360 flow [2023-08-24 02:27:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:27:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:27:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1178 transitions. [2023-08-24 02:27:41,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3617936117936118 [2023-08-24 02:27:41,922 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1178 transitions. [2023-08-24 02:27:41,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1178 transitions. [2023-08-24 02:27:41,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:41,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1178 transitions. [2023-08-24 02:27:41,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.25) internal successors, (1178), 8 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:41,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:41,932 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:41,932 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 117 flow. Second operand 8 states and 1178 transitions. [2023-08-24 02:27:41,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 360 flow [2023-08-24 02:27:41,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 69 transitions, 345 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-24 02:27:41,938 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 185 flow [2023-08-24 02:27:41,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-24 02:27:41,940 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 15 predicate places. [2023-08-24 02:27:41,940 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 185 flow [2023-08-24 02:27:41,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:41,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:41,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:41,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 02:27:42,147 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 [2023-08-24 02:27:42,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:42,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:42,148 INFO L85 PathProgramCache]: Analyzing trace with hash 747784597, now seen corresponding path program 3 times [2023-08-24 02:27:42,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:42,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975245456] [2023-08-24 02:27:42,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:42,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:43,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975245456] [2023-08-24 02:27:43,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975245456] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:27:43,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871895615] [2023-08-24 02:27:43,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:27:43,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:43,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:43,704 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:27:43,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 02:27:43,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 02:27:43,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:27:43,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 02:27:43,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:27:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:27:44,104 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:27:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:27:44,356 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 02:27:44,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871895615] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:27:44,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 02:27:44,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 17 [2023-08-24 02:27:44,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419719305] [2023-08-24 02:27:44,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:27:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 02:27:44,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:27:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 02:27:44,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2023-08-24 02:27:44,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 407 [2023-08-24 02:27:44,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 185 flow. Second operand has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:44,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:27:44,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 407 [2023-08-24 02:27:44,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:27:44,701 INFO L124 PetriNetUnfolderBase]: 303/509 cut-off events. [2023-08-24 02:27:44,702 INFO L125 PetriNetUnfolderBase]: For 613/613 co-relation queries the response was YES. [2023-08-24 02:27:44,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1810 conditions, 509 events. 303/509 cut-off events. For 613/613 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1820 event pairs, 59 based on Foata normal form. 7/404 useless extension candidates. Maximal degree in co-relation 1796. Up to 386 conditions per place. [2023-08-24 02:27:44,705 INFO L140 encePairwiseOnDemand]: 395/407 looper letters, 40 selfloop transitions, 9 changer transitions 24/75 dead transitions. [2023-08-24 02:27:44,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 462 flow [2023-08-24 02:27:44,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:27:44,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:27:44,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1177 transitions. [2023-08-24 02:27:44,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3614864864864865 [2023-08-24 02:27:44,709 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1177 transitions. [2023-08-24 02:27:44,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1177 transitions. [2023-08-24 02:27:44,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:27:44,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1177 transitions. [2023-08-24 02:27:44,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 147.125) internal successors, (1177), 8 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:44,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:44,719 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:44,719 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 185 flow. Second operand 8 states and 1177 transitions. [2023-08-24 02:27:44,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 462 flow [2023-08-24 02:27:44,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 75 transitions, 429 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-24 02:27:44,723 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 236 flow [2023-08-24 02:27:44,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=236, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-24 02:27:44,725 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-24 02:27:44,725 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 236 flow [2023-08-24 02:27:44,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 141.44444444444446) internal successors, (1273), 9 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:27:44,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:27:44,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:27:44,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 02:27:44,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-24 02:27:44,932 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:27:44,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:27:44,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1454631379, now seen corresponding path program 4 times [2023-08-24 02:27:44,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:27:44,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647274447] [2023-08-24 02:27:44,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:27:44,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:27:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:27:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:27:46,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:27:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647274447] [2023-08-24 02:27:46,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647274447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:27:46,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092139908] [2023-08-24 02:27:46,107 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:27:46,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:27:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:27:46,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:27:46,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 02:27:46,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:27:46,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:27:46,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-24 02:27:46,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:27:46,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:27:46,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:27:46,289 INFO L322 Elim1Store]: treesize reduction 47, result has 36.5 percent of original size [2023-08-24 02:27:46,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 02:27:46,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 02:27:46,436 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 02:27:46,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 02:27:46,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:27:46,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:27:46,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:27:46,926 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-24 02:27:46,927 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 49 [2023-08-24 02:27:46,952 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 02:27:46,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 10 [2023-08-24 02:27:47,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-08-24 02:27:47,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:27:47,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:27:48,074 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:27:48,075 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 144 [2023-08-24 02:27:48,106 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:27:48,107 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19726 treesize of output 19158 [2023-08-24 02:27:48,228 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:27:48,228 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1142 treesize of output 1120 [2023-08-24 02:27:48,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:27:48,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1040 treesize of output 988 [2023-08-24 02:27:48,353 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 226 treesize of output 202 [2023-08-24 02:27:48,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:27:48,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 942 treesize of output 758 [2023-08-24 02:28:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:28:02,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092139908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:28:02,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:28:02,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 30 [2023-08-24 02:28:02,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285661366] [2023-08-24 02:28:02,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:28:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 02:28:02,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:28:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 02:28:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=893, Unknown=10, NotChecked=0, Total=992 [2023-08-24 02:28:02,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 407 [2023-08-24 02:28:02,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 236 flow. Second operand has 32 states, 32 states have (on average 104.84375) internal successors, (3355), 32 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:02,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:28:02,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 407 [2023-08-24 02:28:02,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:28:06,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:28:10,711 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:28:13,380 INFO L124 PetriNetUnfolderBase]: 673/1205 cut-off events. [2023-08-24 02:28:13,380 INFO L125 PetriNetUnfolderBase]: For 2341/2343 co-relation queries the response was YES. [2023-08-24 02:28:13,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4554 conditions, 1205 events. 673/1205 cut-off events. For 2341/2343 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6049 event pairs, 80 based on Foata normal form. 22/990 useless extension candidates. Maximal degree in co-relation 4538. Up to 491 conditions per place. [2023-08-24 02:28:13,387 INFO L140 encePairwiseOnDemand]: 392/407 looper letters, 110 selfloop transitions, 54 changer transitions 85/251 dead transitions. [2023-08-24 02:28:13,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 251 transitions, 1712 flow [2023-08-24 02:28:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 02:28:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 02:28:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3216 transitions. [2023-08-24 02:28:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27247310005930697 [2023-08-24 02:28:13,398 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3216 transitions. [2023-08-24 02:28:13,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3216 transitions. [2023-08-24 02:28:13,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:28:13,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3216 transitions. [2023-08-24 02:28:13,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 407.0) internal successors, (12210), 30 states have internal predecessors, (12210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,424 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 407.0) internal successors, (12210), 30 states have internal predecessors, (12210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,424 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 236 flow. Second operand 29 states and 3216 transitions. [2023-08-24 02:28:13,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 251 transitions, 1712 flow [2023-08-24 02:28:13,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 251 transitions, 1598 flow, removed 45 selfloop flow, removed 5 redundant places. [2023-08-24 02:28:13,435 INFO L231 Difference]: Finished difference. Result has 92 places, 95 transitions, 803 flow [2023-08-24 02:28:13,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=803, PETRI_PLACES=92, PETRI_TRANSITIONS=95} [2023-08-24 02:28:13,436 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-08-24 02:28:13,436 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 95 transitions, 803 flow [2023-08-24 02:28:13,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 104.84375) internal successors, (3355), 32 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:28:13,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:28:13,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:28:13,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 02:28:13,647 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 [2023-08-24 02:28:13,647 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:28:13,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:28:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash -948320081, now seen corresponding path program 5 times [2023-08-24 02:28:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:28:13,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189058164] [2023-08-24 02:28:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:28:13,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:28:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:28:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:28:15,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:28:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189058164] [2023-08-24 02:28:15,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189058164] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:28:15,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148319138] [2023-08-24 02:28:15,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:28:15,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:28:15,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:28:15,009 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:28:15,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 02:28:15,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:28:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:28:15,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 02:28:15,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:28:15,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:28:15,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:28:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:28:15,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:28:16,022 INFO L322 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2023-08-24 02:28:16,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2023-08-24 02:28:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:28:16,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:28:16,367 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q2_back~0 0) (<= c_~n2~0 c_~q2_back~0) (let ((.cse1 (* c_~t~0 2)) (.cse3 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse6 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse7 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse2 (select .cse5 ~q2~0.base))) (let ((.cse4 (select .cse2 .cse7))) (let ((.cse0 (+ .cse4 1))) (or (< 0 .cse0) (< (+ .cse1 (* (select .cse2 .cse3) 2)) (+ c_~s~0 .cse4)) (< .cse0 (select (select .cse5 c_~q1~0.base) .cse6)))))))) (forall ((v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse10 (select .cse11 ~q2~0.base))) (let ((.cse9 (select .cse10 .cse7))) (let ((.cse8 (+ .cse9 1))) (or (< 0 .cse8) (<= (+ c_~s~0 .cse9) (+ .cse1 (* (select .cse10 .cse3) 2) 1)) (< .cse8 (select (select .cse11 c_~q1~0.base) .cse6))))))))))) is different from false [2023-08-24 02:28:16,847 INFO L322 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-08-24 02:28:16,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 3534 treesize of output 3238 [2023-08-24 02:28:16,978 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:28:16,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1105 treesize of output 1080 [2023-08-24 02:28:17,044 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:28:17,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1039 treesize of output 948 [2023-08-24 02:28:17,112 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:28:17,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 907 treesize of output 882 [2023-08-24 02:28:17,169 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:28:17,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 841 treesize of output 750 [2023-08-24 02:31:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:31:27,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148319138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:31:27,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:31:27,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 31 [2023-08-24 02:31:27,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789032622] [2023-08-24 02:31:27,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:31:27,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 02:31:27,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:31:27,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 02:31:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=4, NotChecked=60, Total=1056 [2023-08-24 02:31:27,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 407 [2023-08-24 02:31:27,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 95 transitions, 803 flow. Second operand has 33 states, 33 states have (on average 111.78787878787878) internal successors, (3689), 33 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:27,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:31:27,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 407 [2023-08-24 02:31:27,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:31:28,322 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~t~0 2))) (let ((.cse7 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse8 (+ (* c_~q2_back~0 4) c_~q2~0.offset)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse21 (<= c_~n1~0 c_~q1_back~0)) (.cse0 (< c_~q2_back~0 0)) (.cse22 (= c_~q2_front~0 c_~q2_back~0)) (.cse23 (= c_~q1_back~0 c_~q1_front~0)) (.cse24 (< .cse5 (+ c_~s~0 1))) (.cse25 (< c_~s~0 (+ .cse5 1))) (.cse13 (<= c_~n2~0 c_~q2_back~0)) (.cse26 (< c_~q1_back~0 0))) (and (or .cse0 (and (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse6 (select .cse2 ~q2~0.base))) (let ((.cse4 (select .cse6 .cse8))) (let ((.cse1 (+ .cse4 1))) (or (< 0 .cse1) (< .cse1 (select (select .cse2 c_~q1~0.base) .cse3)) (<= (+ c_~s~0 .cse4) (+ .cse5 (* (select .cse6 .cse7) 2) 1)))))))) (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse9 (select .cse12 ~q2~0.base))) (let ((.cse10 (select .cse9 .cse8))) (let ((.cse11 (+ .cse10 1))) (or (< (+ .cse5 (* (select .cse9 .cse7) 2)) (+ c_~s~0 .cse10)) (< 0 .cse11) (< .cse11 (select (select .cse12 c_~q1~0.base) .cse3))))))))) .cse13) (or .cse0 .cse13 (let ((.cse15 (select (select |c_#memory_int| c_~q1~0.base) .cse3))) (and (forall ((~q2~0.base Int)) (let ((.cse17 (select |c_#memory_int| ~q2~0.base))) (let ((.cse16 (select .cse17 .cse8))) (let ((.cse14 (+ .cse16 1))) (or (< 0 .cse14) (< .cse14 .cse15) (<= (+ c_~s~0 .cse16) (+ .cse5 (* 2 (select .cse17 .cse7)) 1))))))) (forall ((~q2~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~q2~0.base))) (let ((.cse19 (select .cse18 .cse8))) (let ((.cse20 (+ .cse19 1))) (or (< (+ .cse5 (* 2 (select .cse18 .cse7))) (+ c_~s~0 .cse19)) (< 0 .cse20) (< .cse20 .cse15))))))))) (or .cse21 .cse0 (and (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse22 (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t3~0#1.base|) .cse23 .cse24 .cse25) (< 0 c_~q2_back~0) (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse26) (or .cse21 .cse0 (and (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| c_~q1~0.base)) .cse22 .cse23 .cse24 (not (= |c_ULTIMATE.start_main_~#t3~0#1.base| c_~q1~0.base)) .cse25) .cse13 .cse26)))) is different from false [2023-08-24 02:31:28,514 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (< c_~q2_back~0 0)) (.cse13 (<= c_~n2~0 c_~q2_back~0)) (.cse5 (* c_~t~0 2)) (.cse7 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse8 (+ (* c_~q2_back~0 4) c_~q2~0.offset)) (.cse3 (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (and (or .cse0 (and (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse6 (select .cse2 ~q2~0.base))) (let ((.cse4 (select .cse6 .cse8))) (let ((.cse1 (+ .cse4 1))) (or (< 0 .cse1) (< .cse1 (select (select .cse2 c_~q1~0.base) .cse3)) (<= (+ c_~s~0 .cse4) (+ .cse5 (* (select .cse6 .cse7) 2) 1)))))))) (forall ((v_ArrVal_317 (Array Int Int)) (v_ArrVal_318 (Array Int Int)) (~q2~0.base Int)) (let ((.cse12 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_317) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_318))) (let ((.cse9 (select .cse12 ~q2~0.base))) (let ((.cse10 (select .cse9 .cse8))) (let ((.cse11 (+ .cse10 1))) (or (< (+ .cse5 (* (select .cse9 .cse7) 2)) (+ c_~s~0 .cse10)) (< 0 .cse11) (< .cse11 (select (select .cse12 c_~q1~0.base) .cse3))))))))) .cse13) (or .cse0 .cse13 (let ((.cse15 (select (select |c_#memory_int| c_~q1~0.base) .cse3))) (and (forall ((~q2~0.base Int)) (let ((.cse17 (select |c_#memory_int| ~q2~0.base))) (let ((.cse16 (select .cse17 .cse8))) (let ((.cse14 (+ .cse16 1))) (or (< 0 .cse14) (< .cse14 .cse15) (<= (+ c_~s~0 .cse16) (+ .cse5 (* 2 (select .cse17 .cse7)) 1))))))) (forall ((~q2~0.base Int)) (let ((.cse18 (select |c_#memory_int| ~q2~0.base))) (let ((.cse19 (select .cse18 .cse8))) (let ((.cse20 (+ .cse19 1))) (or (< (+ .cse5 (* 2 (select .cse18 .cse7))) (+ c_~s~0 .cse19)) (< 0 .cse20) (< .cse20 .cse15))))))))))) is different from false [2023-08-24 02:31:31,468 INFO L124 PetriNetUnfolderBase]: 1224/2065 cut-off events. [2023-08-24 02:31:31,468 INFO L125 PetriNetUnfolderBase]: For 7382/7386 co-relation queries the response was YES. [2023-08-24 02:31:31,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9457 conditions, 2065 events. 1224/2065 cut-off events. For 7382/7386 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10690 event pairs, 67 based on Foata normal form. 2/1861 useless extension candidates. Maximal degree in co-relation 9426. Up to 753 conditions per place. [2023-08-24 02:31:31,484 INFO L140 encePairwiseOnDemand]: 387/407 looper letters, 125 selfloop transitions, 127 changer transitions 41/295 dead transitions. [2023-08-24 02:31:31,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 295 transitions, 2684 flow [2023-08-24 02:31:31,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 02:31:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 02:31:31,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3170 transitions. [2023-08-24 02:31:31,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2884702884702885 [2023-08-24 02:31:31,495 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3170 transitions. [2023-08-24 02:31:31,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3170 transitions. [2023-08-24 02:31:31,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:31:31,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3170 transitions. [2023-08-24 02:31:31,503 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 117.4074074074074) internal successors, (3170), 27 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:31,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 407.0) internal successors, (11396), 28 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:31,517 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 407.0) internal successors, (11396), 28 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:31,517 INFO L175 Difference]: Start difference. First operand has 92 places, 95 transitions, 803 flow. Second operand 27 states and 3170 transitions. [2023-08-24 02:31:31,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 295 transitions, 2684 flow [2023-08-24 02:31:31,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 295 transitions, 2294 flow, removed 191 selfloop flow, removed 8 redundant places. [2023-08-24 02:31:31,555 INFO L231 Difference]: Finished difference. Result has 116 places, 191 transitions, 1921 flow [2023-08-24 02:31:31,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=622, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1921, PETRI_PLACES=116, PETRI_TRANSITIONS=191} [2023-08-24 02:31:31,556 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 84 predicate places. [2023-08-24 02:31:31,556 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 191 transitions, 1921 flow [2023-08-24 02:31:31,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 111.78787878787878) internal successors, (3689), 33 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:31,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:31:31,558 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] [2023-08-24 02:31:31,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 02:31:31,763 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 [2023-08-24 02:31:31,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:31:31,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:31:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash 433662685, now seen corresponding path program 6 times [2023-08-24 02:31:31,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:31:31,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773026934] [2023-08-24 02:31:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:31:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:31:31,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:31:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:31:33,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:31:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773026934] [2023-08-24 02:31:33,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773026934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:31:33,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122267901] [2023-08-24 02:31:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 02:31:33,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:31:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:31:33,825 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:31:33,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 02:31:33,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2023-08-24 02:31:33,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:31:33,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 02:31:33,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:31:34,024 INFO L322 Elim1Store]: treesize reduction 76, result has 30.3 percent of original size [2023-08-24 02:31:34,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 38 [2023-08-24 02:31:34,092 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:31:34,092 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 02:31:34,375 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 02:31:34,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 40 [2023-08-24 02:31:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:31:34,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 02:31:34,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122267901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:31:34,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 02:31:34,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 02:31:34,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716621964] [2023-08-24 02:31:34,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:31:34,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 02:31:34,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:31:34,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 02:31:34,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2023-08-24 02:31:34,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 407 [2023-08-24 02:31:34,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 191 transitions, 1921 flow. Second operand has 10 states, 10 states have (on average 132.2) internal successors, (1322), 10 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:34,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:31:34,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 407 [2023-08-24 02:31:34,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:31:35,077 INFO L124 PetriNetUnfolderBase]: 1165/1939 cut-off events. [2023-08-24 02:31:35,078 INFO L125 PetriNetUnfolderBase]: For 10466/10484 co-relation queries the response was YES. [2023-08-24 02:31:35,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11130 conditions, 1939 events. 1165/1939 cut-off events. For 10466/10484 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9676 event pairs, 164 based on Foata normal form. 1/1825 useless extension candidates. Maximal degree in co-relation 11092. Up to 1661 conditions per place. [2023-08-24 02:31:35,099 INFO L140 encePairwiseOnDemand]: 397/407 looper letters, 177 selfloop transitions, 18 changer transitions 34/231 dead transitions. [2023-08-24 02:31:35,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 231 transitions, 2597 flow [2023-08-24 02:31:35,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:31:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:31:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1110 transitions. [2023-08-24 02:31:35,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2023-08-24 02:31:35,103 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1110 transitions. [2023-08-24 02:31:35,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1110 transitions. [2023-08-24 02:31:35,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:31:35,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1110 transitions. [2023-08-24 02:31:35,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:35,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:35,110 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:35,110 INFO L175 Difference]: Start difference. First operand has 116 places, 191 transitions, 1921 flow. Second operand 8 states and 1110 transitions. [2023-08-24 02:31:35,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 231 transitions, 2597 flow [2023-08-24 02:31:35,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 231 transitions, 2324 flow, removed 119 selfloop flow, removed 11 redundant places. [2023-08-24 02:31:35,183 INFO L231 Difference]: Finished difference. Result has 111 places, 187 transitions, 1649 flow [2023-08-24 02:31:35,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1650, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1649, PETRI_PLACES=111, PETRI_TRANSITIONS=187} [2023-08-24 02:31:35,184 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 79 predicate places. [2023-08-24 02:31:35,184 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 187 transitions, 1649 flow [2023-08-24 02:31:35,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 132.2) internal successors, (1322), 10 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:35,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:31:35,185 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] [2023-08-24 02:31:35,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 02:31:35,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:31:35,390 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:31:35,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:31:35,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1935814014, now seen corresponding path program 1 times [2023-08-24 02:31:35,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:31:35,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106097904] [2023-08-24 02:31:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:31:35,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:31:35,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:31:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:31:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:31:35,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106097904] [2023-08-24 02:31:35,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106097904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:31:35,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127874702] [2023-08-24 02:31:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:31:35,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:31:35,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:31:35,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:31:35,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 02:31:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:31:35,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:31:35,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:31:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:31:35,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:31:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:31:35,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127874702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:31:35,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:31:35,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 02:31:35,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914170844] [2023-08-24 02:31:35,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:31:35,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 02:31:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:31:35,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 02:31:35,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 02:31:35,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 407 [2023-08-24 02:31:35,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 187 transitions, 1649 flow. Second operand has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:35,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:31:35,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 407 [2023-08-24 02:31:35,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:31:36,155 INFO L124 PetriNetUnfolderBase]: 991/1657 cut-off events. [2023-08-24 02:31:36,156 INFO L125 PetriNetUnfolderBase]: For 8868/8897 co-relation queries the response was YES. [2023-08-24 02:31:36,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8897 conditions, 1657 events. 991/1657 cut-off events. For 8868/8897 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7909 event pairs, 207 based on Foata normal form. 166/1620 useless extension candidates. Maximal degree in co-relation 8861. Up to 1021 conditions per place. [2023-08-24 02:31:36,172 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 140 selfloop transitions, 5 changer transitions 40/189 dead transitions. [2023-08-24 02:31:36,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 189 transitions, 1985 flow [2023-08-24 02:31:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 02:31:36,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 02:31:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 955 transitions. [2023-08-24 02:31:36,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39107289107289106 [2023-08-24 02:31:36,175 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 955 transitions. [2023-08-24 02:31:36,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 955 transitions. [2023-08-24 02:31:36,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:31:36,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 955 transitions. [2023-08-24 02:31:36,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 159.16666666666666) internal successors, (955), 6 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:36,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:36,181 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 407.0) internal successors, (2849), 7 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:36,181 INFO L175 Difference]: Start difference. First operand has 111 places, 187 transitions, 1649 flow. Second operand 6 states and 955 transitions. [2023-08-24 02:31:36,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 189 transitions, 1985 flow [2023-08-24 02:31:36,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 189 transitions, 1905 flow, removed 19 selfloop flow, removed 9 redundant places. [2023-08-24 02:31:36,222 INFO L231 Difference]: Finished difference. Result has 101 places, 121 transitions, 1065 flow [2023-08-24 02:31:36,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=1335, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=101, PETRI_TRANSITIONS=121} [2023-08-24 02:31:36,222 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 69 predicate places. [2023-08-24 02:31:36,222 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 121 transitions, 1065 flow [2023-08-24 02:31:36,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 152.66666666666666) internal successors, (1832), 12 states have internal predecessors, (1832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:36,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:31:36,223 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] [2023-08-24 02:31:36,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 02:31:36,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:31:36,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:31:36,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:31:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1096019765, now seen corresponding path program 7 times [2023-08-24 02:31:36,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:31:36,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491707290] [2023-08-24 02:31:36,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:31:36,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:31:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:31:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:31:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:31:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491707290] [2023-08-24 02:31:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491707290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:31:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29924913] [2023-08-24 02:31:38,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 02:31:38,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:31:38,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:31:38,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:31:38,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 02:31:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:31:38,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 70 conjunts are in the unsatisfiable core [2023-08-24 02:31:38,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:31:38,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:38,422 INFO L322 Elim1Store]: treesize reduction 52, result has 29.7 percent of original size [2023-08-24 02:31:38,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 02:31:38,574 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 02:31:38,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 25 [2023-08-24 02:31:38,670 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 02:31:38,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:31:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:38,994 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:31:39,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:39,332 INFO L322 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-08-24 02:31:39,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 76 [2023-08-24 02:31:39,518 INFO L322 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2023-08-24 02:31:39,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2023-08-24 02:31:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:31:39,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:31:39,685 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_~t~0 2)) (.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_497 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse1)) 1) c_~s~0)) (forall ((v_ArrVal_497 (Array Int Int))) (<= c_~s~0 (+ .cse0 2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse1))))))) is different from false [2023-08-24 02:31:39,703 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q2_back~0 0) (<= c_~n2~0 c_~q2_back~0) (not (= |c_thread2Thread1of1ForFork2_~j~0#1| (+ (select (select |c_#memory_int| c_~q2~0.base) (+ (* c_~q2_back~0 4) c_~q2~0.offset)) 1))) (< 0 |c_thread2Thread1of1ForFork2_~j~0#1|) (let ((.cse2 (+ c_~s~0 |c_thread2Thread1of1ForFork2_~j~0#1|)) (.cse0 (* c_~t~0 2)) (.cse1 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (forall ((v_ArrVal_497 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse1)) 1) .cse2)) (forall ((v_ArrVal_497 (Array Int Int))) (<= .cse2 (+ .cse0 2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse1)))))))) is different from false [2023-08-24 02:31:39,865 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~q2_back~0 0) (let ((.cse0 (* c_~t~0 2)) (.cse2 (+ c_~q2~0.offset (* c_~q2_front~0 4))) (.cse5 (+ (* c_~q1_front~0 4) c_~q1~0.offset)) (.cse6 (+ (* c_~q2_back~0 4) c_~q2~0.offset))) (and (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496))) (let ((.cse3 (select (select .cse1 c_~q2~0.base) .cse6))) (let ((.cse4 (+ .cse3 1))) (or (forall ((v_ArrVal_497 (Array Int Int))) (< (+ .cse0 (* 2 (select (select (store .cse1 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse2))) (+ c_~s~0 .cse3))) (< .cse4 (select (select .cse1 c_~q1~0.base) .cse5)) (< 0 .cse4)))))) (forall ((v_ArrVal_496 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_496))) (let ((.cse7 (select (select .cse8 c_~q2~0.base) .cse6))) (let ((.cse9 (+ .cse7 1))) (or (forall ((v_ArrVal_497 (Array Int Int))) (<= (+ c_~s~0 .cse7) (+ .cse0 (* 2 (select (select (store .cse8 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse2)) 1))) (< .cse9 (select (select .cse8 c_~q1~0.base) .cse5)) (< 0 .cse9)))))))) (<= c_~n2~0 c_~q2_back~0)) is different from false [2023-08-24 02:31:40,383 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:31:40,384 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 123 [2023-08-24 02:31:40,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:31:40,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 3206 treesize of output 2962 [2023-08-24 02:31:40,488 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:31:40,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 684 treesize of output 580 [2023-08-24 02:31:40,514 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 184 [2023-08-24 02:31:40,584 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:31:40,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 432 treesize of output 434 [2023-08-24 02:31:48,392 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:31:48,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-24 02:31:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:31:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:31:48,446 INFO L322 Elim1Store]: treesize reduction 69, result has 25.8 percent of original size [2023-08-24 02:31:48,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 858 treesize of output 753 [2023-08-24 02:31:48,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:48,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 342 treesize of output 274 [2023-08-24 02:31:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:31:48,508 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:31:48,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 196 [2023-08-24 02:31:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:31:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29924913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:31:49,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:31:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 32 [2023-08-24 02:31:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151768400] [2023-08-24 02:31:49,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:31:49,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 02:31:49,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:31:49,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 02:31:49,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=833, Unknown=15, NotChecked=180, Total=1122 [2023-08-24 02:31:49,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 407 [2023-08-24 02:31:49,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 121 transitions, 1065 flow. Second operand has 34 states, 34 states have (on average 104.79411764705883) internal successors, (3563), 34 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:31:49,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:31:49,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 407 [2023-08-24 02:31:49,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:01,723 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~t~0 2)) (.cse2 (+ c_~q2~0.offset (* c_~q2_front~0 4)))) (and (or (< c_~q2_back~0 0) (< 0 c_~q2_back~0) (let ((.cse0 (forall ((|v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_108| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_108|) 0)) (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base_108|))))) (and (or .cse0 (< c_~s~0 (+ .cse1 1))) (or (= c_~q2_front~0 c_~q2_back~0) .cse0) (or .cse0 (< .cse1 (+ c_~s~0 1))) (or (= c_~q1_back~0 c_~q1_front~0) .cse0) (or (< |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| |c_ULTIMATE.start_main_~#t2~0#1.base|) .cse0) (or (not (= (select |c_#valid| |c_ULTIMATE.start_main_~#t3~0#1.base|) 0)) (<= |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#t3~0#1.base|))))) (forall ((v_ArrVal_497 (Array Int Int))) (< (+ .cse1 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse2)) 1) c_~s~0)) (forall ((v_ArrVal_497 (Array Int Int))) (<= c_~s~0 (+ .cse1 2 (* 2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_497) c_~q2~0.base) .cse2))))))) is different from false [2023-08-24 02:32:03,094 INFO L124 PetriNetUnfolderBase]: 1480/2472 cut-off events. [2023-08-24 02:32:03,094 INFO L125 PetriNetUnfolderBase]: For 12656/12662 co-relation queries the response was YES. [2023-08-24 02:32:03,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13083 conditions, 2472 events. 1480/2472 cut-off events. For 12656/12662 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12875 event pairs, 95 based on Foata normal form. 26/2201 useless extension candidates. Maximal degree in co-relation 13051. Up to 927 conditions per place. [2023-08-24 02:32:03,118 INFO L140 encePairwiseOnDemand]: 387/407 looper letters, 173 selfloop transitions, 160 changer transitions 69/404 dead transitions. [2023-08-24 02:32:03,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 404 transitions, 4072 flow [2023-08-24 02:32:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 02:32:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 02:32:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3963 transitions. [2023-08-24 02:32:03,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2704750204750205 [2023-08-24 02:32:03,126 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3963 transitions. [2023-08-24 02:32:03,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3963 transitions. [2023-08-24 02:32:03,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:03,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3963 transitions. [2023-08-24 02:32:03,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 110.08333333333333) internal successors, (3963), 36 states have internal predecessors, (3963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:03,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 407.0) internal successors, (15059), 37 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:03,150 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 407.0) internal successors, (15059), 37 states have internal predecessors, (15059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:03,150 INFO L175 Difference]: Start difference. First operand has 101 places, 121 transitions, 1065 flow. Second operand 36 states and 3963 transitions. [2023-08-24 02:32:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 404 transitions, 4072 flow [2023-08-24 02:32:03,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 404 transitions, 3705 flow, removed 174 selfloop flow, removed 8 redundant places. [2023-08-24 02:32:03,208 INFO L231 Difference]: Finished difference. Result has 139 places, 243 transitions, 2691 flow [2023-08-24 02:32:03,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2691, PETRI_PLACES=139, PETRI_TRANSITIONS=243} [2023-08-24 02:32:03,209 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 107 predicate places. [2023-08-24 02:32:03,209 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 243 transitions, 2691 flow [2023-08-24 02:32:03,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 104.79411764705883) internal successors, (3563), 34 states have internal predecessors, (3563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:03,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:32:03,210 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] [2023-08-24 02:32:03,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 02:32:03,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:32:03,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:32:03,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:32:03,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1094840856, now seen corresponding path program 1 times [2023-08-24 02:32:03,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:32:03,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281908952] [2023-08-24 02:32:03,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:32:03,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:32:03,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:32:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:32:03,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:32:03,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281908952] [2023-08-24 02:32:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281908952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:32:03,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 02:32:03,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 02:32:03,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132609204] [2023-08-24 02:32:03,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:32:03,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 02:32:03,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:32:03,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 02:32:03,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-24 02:32:03,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 407 [2023-08-24 02:32:03,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 243 transitions, 2691 flow. Second operand has 5 states, 5 states have (on average 179.4) internal successors, (897), 5 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:03,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:32:03,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 407 [2023-08-24 02:32:03,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:04,099 INFO L124 PetriNetUnfolderBase]: 1903/3093 cut-off events. [2023-08-24 02:32:04,099 INFO L125 PetriNetUnfolderBase]: For 23026/23029 co-relation queries the response was YES. [2023-08-24 02:32:04,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19955 conditions, 3093 events. 1903/3093 cut-off events. For 23026/23029 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16066 event pairs, 180 based on Foata normal form. 122/2761 useless extension candidates. Maximal degree in co-relation 19911. Up to 1161 conditions per place. [2023-08-24 02:32:04,139 INFO L140 encePairwiseOnDemand]: 402/407 looper letters, 222 selfloop transitions, 54 changer transitions 19/299 dead transitions. [2023-08-24 02:32:04,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 299 transitions, 3860 flow [2023-08-24 02:32:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 02:32:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 02:32:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 756 transitions. [2023-08-24 02:32:04,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4643734643734644 [2023-08-24 02:32:04,141 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 756 transitions. [2023-08-24 02:32:04,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 756 transitions. [2023-08-24 02:32:04,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:04,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 756 transitions. [2023-08-24 02:32:04,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:04,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:04,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 407.0) internal successors, (2035), 5 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:04,147 INFO L175 Difference]: Start difference. First operand has 139 places, 243 transitions, 2691 flow. Second operand 4 states and 756 transitions. [2023-08-24 02:32:04,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 299 transitions, 3860 flow [2023-08-24 02:32:04,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 299 transitions, 3434 flow, removed 154 selfloop flow, removed 12 redundant places. [2023-08-24 02:32:04,248 INFO L231 Difference]: Finished difference. Result has 125 places, 241 transitions, 2557 flow [2023-08-24 02:32:04,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2557, PETRI_PLACES=125, PETRI_TRANSITIONS=241} [2023-08-24 02:32:04,250 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 93 predicate places. [2023-08-24 02:32:04,250 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 241 transitions, 2557 flow [2023-08-24 02:32:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 179.4) internal successors, (897), 5 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:04,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:32:04,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:32:04,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 02:32:04,250 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:32:04,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:32:04,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1153286125, now seen corresponding path program 8 times [2023-08-24 02:32:04,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:32:04,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493865597] [2023-08-24 02:32:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:32:04,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:32:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:32:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:32:05,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:32:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493865597] [2023-08-24 02:32:05,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493865597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:32:05,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506607080] [2023-08-24 02:32:05,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:32:05,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:32:05,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:32:05,813 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:32:05,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 02:32:05,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-24 02:32:05,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:32:05,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-24 02:32:05,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:32:06,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:06,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:06,304 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:06,556 INFO L322 Elim1Store]: treesize reduction 3, result has 85.0 percent of original size [2023-08-24 02:32:06,556 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2023-08-24 02:32:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-24 02:32:06,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 02:32:06,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506607080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:32:06,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 02:32:06,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 20 [2023-08-24 02:32:06,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350074963] [2023-08-24 02:32:06,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:32:06,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 02:32:06,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:32:06,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 02:32:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2023-08-24 02:32:06,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 407 [2023-08-24 02:32:06,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 241 transitions, 2557 flow. Second operand has 10 states, 10 states have (on average 138.2) internal successors, (1382), 10 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:06,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:32:06,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 407 [2023-08-24 02:32:06,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:07,226 INFO L124 PetriNetUnfolderBase]: 1892/3060 cut-off events. [2023-08-24 02:32:07,226 INFO L125 PetriNetUnfolderBase]: For 24601/24601 co-relation queries the response was YES. [2023-08-24 02:32:07,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20266 conditions, 3060 events. 1892/3060 cut-off events. For 24601/24601 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15584 event pairs, 228 based on Foata normal form. 1/2641 useless extension candidates. Maximal degree in co-relation 20226. Up to 2618 conditions per place. [2023-08-24 02:32:07,253 INFO L140 encePairwiseOnDemand]: 396/407 looper letters, 206 selfloop transitions, 56 changer transitions 17/281 dead transitions. [2023-08-24 02:32:07,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 281 transitions, 3556 flow [2023-08-24 02:32:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 02:32:07,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 02:32:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1153 transitions. [2023-08-24 02:32:07,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35411547911547914 [2023-08-24 02:32:07,256 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1153 transitions. [2023-08-24 02:32:07,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1153 transitions. [2023-08-24 02:32:07,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:07,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1153 transitions. [2023-08-24 02:32:07,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.125) internal successors, (1153), 8 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:07,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:07,261 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 407.0) internal successors, (3663), 9 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:07,261 INFO L175 Difference]: Start difference. First operand has 125 places, 241 transitions, 2557 flow. Second operand 8 states and 1153 transitions. [2023-08-24 02:32:07,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 281 transitions, 3556 flow [2023-08-24 02:32:07,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 281 transitions, 3526 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-24 02:32:07,344 INFO L231 Difference]: Finished difference. Result has 135 places, 247 transitions, 2819 flow [2023-08-24 02:32:07,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2819, PETRI_PLACES=135, PETRI_TRANSITIONS=247} [2023-08-24 02:32:07,345 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 103 predicate places. [2023-08-24 02:32:07,345 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 247 transitions, 2819 flow [2023-08-24 02:32:07,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 138.2) internal successors, (1382), 10 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:07,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:32:07,346 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] [2023-08-24 02:32:07,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 02:32:07,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 02:32:07,551 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:32:07,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:32:07,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1897007062, now seen corresponding path program 2 times [2023-08-24 02:32:07,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:32:07,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171549765] [2023-08-24 02:32:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:32:07,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:32:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:32:07,945 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:07,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:32:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171549765] [2023-08-24 02:32:07,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171549765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:32:07,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356798818] [2023-08-24 02:32:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:32:07,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:32:07,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:32:07,949 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:32:07,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 02:32:08,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:32:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:32:08,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 02:32:08,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:32:08,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:08,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:32:08,425 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 02:32:08,426 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-24 02:32:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:08,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356798818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:32:08,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:32:08,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 02:32:08,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009017728] [2023-08-24 02:32:08,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:32:08,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 02:32:08,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:32:08,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 02:32:08,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-08-24 02:32:08,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 407 [2023-08-24 02:32:08,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 247 transitions, 2819 flow. Second operand has 23 states, 23 states have (on average 132.52173913043478) internal successors, (3048), 23 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:08,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:32:08,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 407 [2023-08-24 02:32:08,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:10,184 INFO L124 PetriNetUnfolderBase]: 5093/7749 cut-off events. [2023-08-24 02:32:10,184 INFO L125 PetriNetUnfolderBase]: For 72671/72671 co-relation queries the response was YES. [2023-08-24 02:32:10,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53450 conditions, 7749 events. 5093/7749 cut-off events. For 72671/72671 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43217 event pairs, 313 based on Foata normal form. 203/6775 useless extension candidates. Maximal degree in co-relation 53405. Up to 2635 conditions per place. [2023-08-24 02:32:10,249 INFO L140 encePairwiseOnDemand]: 397/407 looper letters, 499 selfloop transitions, 204 changer transitions 15/720 dead transitions. [2023-08-24 02:32:10,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 720 transitions, 9852 flow [2023-08-24 02:32:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 02:32:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 02:32:10,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3084 transitions. [2023-08-24 02:32:10,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34442707169979897 [2023-08-24 02:32:10,253 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3084 transitions. [2023-08-24 02:32:10,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3084 transitions. [2023-08-24 02:32:10,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:10,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3084 transitions. [2023-08-24 02:32:10,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 140.1818181818182) internal successors, (3084), 22 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:10,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 407.0) internal successors, (9361), 23 states have internal predecessors, (9361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:10,266 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 407.0) internal successors, (9361), 23 states have internal predecessors, (9361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:10,266 INFO L175 Difference]: Start difference. First operand has 135 places, 247 transitions, 2819 flow. Second operand 22 states and 3084 transitions. [2023-08-24 02:32:10,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 720 transitions, 9852 flow [2023-08-24 02:32:10,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 720 transitions, 9614 flow, removed 77 selfloop flow, removed 7 redundant places. [2023-08-24 02:32:10,521 INFO L231 Difference]: Finished difference. Result has 162 places, 399 transitions, 5556 flow [2023-08-24 02:32:10,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=2705, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5556, PETRI_PLACES=162, PETRI_TRANSITIONS=399} [2023-08-24 02:32:10,522 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2023-08-24 02:32:10,522 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 399 transitions, 5556 flow [2023-08-24 02:32:10,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 132.52173913043478) internal successors, (3048), 23 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:10,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:32:10,523 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] [2023-08-24 02:32:10,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 02:32:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 02:32:10,728 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:32:10,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:32:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1541957790, now seen corresponding path program 3 times [2023-08-24 02:32:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:32:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290402271] [2023-08-24 02:32:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:32:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:32:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:32:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:11,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:32:11,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290402271] [2023-08-24 02:32:11,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290402271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:32:11,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137300222] [2023-08-24 02:32:11,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:32:11,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:32:11,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:32:11,357 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:32:11,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 02:32:11,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 02:32:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:32:11,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-24 02:32:11,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:32:11,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:11,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:32:11,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:32:12,266 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:32:12,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 240 [2023-08-24 02:32:12,295 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:32:12,295 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 115 [2023-08-24 02:32:12,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:32:12,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137300222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:32:12,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:32:12,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 25 [2023-08-24 02:32:12,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883732098] [2023-08-24 02:32:12,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:32:12,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 02:32:12,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:32:12,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 02:32:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=574, Unknown=2, NotChecked=0, Total=650 [2023-08-24 02:32:12,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 407 [2023-08-24 02:32:12,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 399 transitions, 5556 flow. Second operand has 26 states, 26 states have (on average 115.42307692307692) internal successors, (3001), 26 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:12,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:32:12,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 407 [2023-08-24 02:32:12,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:25,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 02:32:39,955 INFO L124 PetriNetUnfolderBase]: 12169/18470 cut-off events. [2023-08-24 02:32:39,955 INFO L125 PetriNetUnfolderBase]: For 289892/289898 co-relation queries the response was YES. [2023-08-24 02:32:40,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154285 conditions, 18470 events. 12169/18470 cut-off events. For 289892/289898 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 119187 event pairs, 436 based on Foata normal form. 90/15908 useless extension candidates. Maximal degree in co-relation 154230. Up to 6734 conditions per place. [2023-08-24 02:32:40,186 INFO L140 encePairwiseOnDemand]: 392/407 looper letters, 597 selfloop transitions, 745 changer transitions 41/1385 dead transitions. [2023-08-24 02:32:40,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1385 transitions, 22249 flow [2023-08-24 02:32:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-24 02:32:40,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-24 02:32:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 7701 transitions. [2023-08-24 02:32:40,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30033930033930034 [2023-08-24 02:32:40,200 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 7701 transitions. [2023-08-24 02:32:40,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 7701 transitions. [2023-08-24 02:32:40,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:40,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 7701 transitions. [2023-08-24 02:32:40,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 122.23809523809524) internal successors, (7701), 63 states have internal predecessors, (7701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:40,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 407.0) internal successors, (26048), 64 states have internal predecessors, (26048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:40,238 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 407.0) internal successors, (26048), 64 states have internal predecessors, (26048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:40,238 INFO L175 Difference]: Start difference. First operand has 162 places, 399 transitions, 5556 flow. Second operand 63 states and 7701 transitions. [2023-08-24 02:32:40,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1385 transitions, 22249 flow [2023-08-24 02:32:42,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 1385 transitions, 21186 flow, removed 526 selfloop flow, removed 4 redundant places. [2023-08-24 02:32:42,037 INFO L231 Difference]: Finished difference. Result has 231 places, 947 transitions, 15315 flow [2023-08-24 02:32:42,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=15315, PETRI_PLACES=231, PETRI_TRANSITIONS=947} [2023-08-24 02:32:42,038 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2023-08-24 02:32:42,038 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 947 transitions, 15315 flow [2023-08-24 02:32:42,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 115.42307692307692) internal successors, (3001), 26 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:42,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:32:42,039 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] [2023-08-24 02:32:42,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-24 02:32:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 02:32:42,239 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:32:42,239 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:32:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1965531846, now seen corresponding path program 4 times [2023-08-24 02:32:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:32:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352856504] [2023-08-24 02:32:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:32:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:32:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:32:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:42,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:32:42,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352856504] [2023-08-24 02:32:42,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352856504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:32:42,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245095632] [2023-08-24 02:32:42,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 02:32:42,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:32:42,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:32:42,835 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:32:42,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 02:32:42,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 02:32:42,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:32:42,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 02:32:42,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:32:43,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:43,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:43,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:43,222 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:43,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:32:43,321 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_759 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_759) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-24 02:32:43,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:32:43,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 158 treesize of output 142 [2023-08-24 02:32:43,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2023-08-24 02:32:43,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-24 02:32:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:43,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245095632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:32:43,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:32:43,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 02:32:43,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742054965] [2023-08-24 02:32:43,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:32:43,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 02:32:43,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:32:43,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 02:32:43,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=646, Unknown=3, NotChecked=52, Total=812 [2023-08-24 02:32:43,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 407 [2023-08-24 02:32:43,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 947 transitions, 15315 flow. Second operand has 29 states, 29 states have (on average 125.13793103448276) internal successors, (3629), 29 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:43,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:32:43,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 407 [2023-08-24 02:32:43,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:32:51,771 INFO L124 PetriNetUnfolderBase]: 17734/26814 cut-off events. [2023-08-24 02:32:51,771 INFO L125 PetriNetUnfolderBase]: For 459311/459311 co-relation queries the response was YES. [2023-08-24 02:32:51,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242809 conditions, 26814 events. 17734/26814 cut-off events. For 459311/459311 co-relation queries the response was YES. Maximal size of possible extension queue 1336. Compared 181391 event pairs, 1319 based on Foata normal form. 329/23745 useless extension candidates. Maximal degree in co-relation 242743. Up to 9389 conditions per place. [2023-08-24 02:32:52,079 INFO L140 encePairwiseOnDemand]: 391/407 looper letters, 1216 selfloop transitions, 783 changer transitions 4/2005 dead transitions. [2023-08-24 02:32:52,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 2005 transitions, 37061 flow [2023-08-24 02:32:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 02:32:52,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 02:32:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 4075 transitions. [2023-08-24 02:32:52,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229769358801617 [2023-08-24 02:32:52,085 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 4075 transitions. [2023-08-24 02:32:52,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 4075 transitions. [2023-08-24 02:32:52,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:32:52,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 4075 transitions. [2023-08-24 02:32:52,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 131.4516129032258) internal successors, (4075), 31 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:52,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 407.0) internal successors, (13024), 32 states have internal predecessors, (13024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:52,101 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 407.0) internal successors, (13024), 32 states have internal predecessors, (13024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:52,101 INFO L175 Difference]: Start difference. First operand has 231 places, 947 transitions, 15315 flow. Second operand 31 states and 4075 transitions. [2023-08-24 02:32:52,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 2005 transitions, 37061 flow [2023-08-24 02:32:56,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 2005 transitions, 32863 flow, removed 1649 selfloop flow, removed 15 redundant places. [2023-08-24 02:32:56,666 INFO L231 Difference]: Finished difference. Result has 260 places, 1315 transitions, 22514 flow [2023-08-24 02:32:56,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=13376, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=947, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=443, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=22514, PETRI_PLACES=260, PETRI_TRANSITIONS=1315} [2023-08-24 02:32:56,667 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 228 predicate places. [2023-08-24 02:32:56,667 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 1315 transitions, 22514 flow [2023-08-24 02:32:56,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 125.13793103448276) internal successors, (3629), 29 states have internal predecessors, (3629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:56,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:32:56,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:32:56,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 02:32:56,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 02:32:56,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:32:56,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:32:56,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2094045124, now seen corresponding path program 5 times [2023-08-24 02:32:56,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:32:56,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639270565] [2023-08-24 02:32:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:32:56,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:32:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:32:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 02:32:57,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:32:57,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639270565] [2023-08-24 02:32:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639270565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:32:57,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533114358] [2023-08-24 02:32:57,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 02:32:57,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:32:57,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:32:57,601 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:32:57,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 02:32:57,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 02:32:57,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:32:57,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 02:32:57,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:32:57,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:57,901 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:57,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:32:57,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:32:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 02:32:57,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:32:58,018 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_821 (Array Int Int))) (< 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_821) c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) is different from false [2023-08-24 02:32:58,069 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:32:58,069 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 72 [2023-08-24 02:32:58,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-08-24 02:32:58,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-24 02:32:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-24 02:32:58,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533114358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:32:58,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:32:58,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 24 [2023-08-24 02:32:58,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80808176] [2023-08-24 02:32:58,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:32:58,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 02:32:58,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:32:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 02:32:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=475, Unknown=3, NotChecked=44, Total=600 [2023-08-24 02:32:58,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 407 [2023-08-24 02:32:58,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1315 transitions, 22514 flow. Second operand has 25 states, 25 states have (on average 125.36) internal successors, (3134), 25 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:32:58,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:32:58,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 407 [2023-08-24 02:32:58,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:33:06,331 INFO L124 PetriNetUnfolderBase]: 18113/27558 cut-off events. [2023-08-24 02:33:06,331 INFO L125 PetriNetUnfolderBase]: For 668775/668785 co-relation queries the response was YES. [2023-08-24 02:33:06,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269020 conditions, 27558 events. 18113/27558 cut-off events. For 668775/668785 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 189750 event pairs, 1563 based on Foata normal form. 24/24414 useless extension candidates. Maximal degree in co-relation 268940. Up to 13011 conditions per place. [2023-08-24 02:33:06,917 INFO L140 encePairwiseOnDemand]: 399/407 looper letters, 874 selfloop transitions, 621 changer transitions 2/1499 dead transitions. [2023-08-24 02:33:06,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1499 transitions, 28589 flow [2023-08-24 02:33:06,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 02:33:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 02:33:06,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1826 transitions. [2023-08-24 02:33:06,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3204633204633205 [2023-08-24 02:33:06,920 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1826 transitions. [2023-08-24 02:33:06,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1826 transitions. [2023-08-24 02:33:06,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:33:06,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1826 transitions. [2023-08-24 02:33:06,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 130.42857142857142) internal successors, (1826), 14 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:06,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 407.0) internal successors, (6105), 15 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:06,927 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 407.0) internal successors, (6105), 15 states have internal predecessors, (6105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:06,927 INFO L175 Difference]: Start difference. First operand has 260 places, 1315 transitions, 22514 flow. Second operand 14 states and 1826 transitions. [2023-08-24 02:33:06,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1499 transitions, 28589 flow [2023-08-24 02:33:14,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 1499 transitions, 27146 flow, removed 435 selfloop flow, removed 10 redundant places. [2023-08-24 02:33:14,127 INFO L231 Difference]: Finished difference. Result has 263 places, 1362 transitions, 23361 flow [2023-08-24 02:33:14,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=21177, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=569, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23361, PETRI_PLACES=263, PETRI_TRANSITIONS=1362} [2023-08-24 02:33:14,128 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 231 predicate places. [2023-08-24 02:33:14,128 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 1362 transitions, 23361 flow [2023-08-24 02:33:14,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 125.36) internal successors, (3134), 25 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:14,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:33:14,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:33:14,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 02:33:14,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 02:33:14,330 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:33:14,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:33:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1267584656, now seen corresponding path program 1 times [2023-08-24 02:33:14,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:33:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933962657] [2023-08-24 02:33:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:33:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:33:14,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:33:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:33:14,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:33:14,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933962657] [2023-08-24 02:33:14,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933962657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:33:14,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68027766] [2023-08-24 02:33:14,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:33:14,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:33:14,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:33:14,437 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:33:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 02:33:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:33:14,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 02:33:14,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:33:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:33:14,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:33:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 02:33:14,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68027766] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:33:14,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:33:14,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-24 02:33:14,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455554114] [2023-08-24 02:33:14,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:33:14,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 02:33:14,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:33:14,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 02:33:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-08-24 02:33:14,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 407 [2023-08-24 02:33:14,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 1362 transitions, 23361 flow. Second operand has 15 states, 15 states have (on average 151.53333333333333) internal successors, (2273), 15 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:14,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:33:14,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 407 [2023-08-24 02:33:14,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:33:23,729 INFO L124 PetriNetUnfolderBase]: 21938/33320 cut-off events. [2023-08-24 02:33:23,729 INFO L125 PetriNetUnfolderBase]: For 827604/827613 co-relation queries the response was YES. [2023-08-24 02:33:24,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 329009 conditions, 33320 events. 21938/33320 cut-off events. For 827604/827613 co-relation queries the response was YES. Maximal size of possible extension queue 1587. Compared 235125 event pairs, 2722 based on Foata normal form. 348/29557 useless extension candidates. Maximal degree in co-relation 328932. Up to 25803 conditions per place. [2023-08-24 02:33:24,217 INFO L140 encePairwiseOnDemand]: 401/407 looper letters, 1465 selfloop transitions, 351 changer transitions 121/1941 dead transitions. [2023-08-24 02:33:24,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1941 transitions, 36925 flow [2023-08-24 02:33:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 02:33:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 02:33:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1418 transitions. [2023-08-24 02:33:24,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871143871143871 [2023-08-24 02:33:24,220 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1418 transitions. [2023-08-24 02:33:24,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1418 transitions. [2023-08-24 02:33:24,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:33:24,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1418 transitions. [2023-08-24 02:33:24,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.55555555555554) internal successors, (1418), 9 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:24,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:24,224 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:24,224 INFO L175 Difference]: Start difference. First operand has 263 places, 1362 transitions, 23361 flow. Second operand 9 states and 1418 transitions. [2023-08-24 02:33:24,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1941 transitions, 36925 flow [2023-08-24 02:33:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1941 transitions, 36693 flow, removed 89 selfloop flow, removed 8 redundant places. [2023-08-24 02:33:32,764 INFO L231 Difference]: Finished difference. Result has 262 places, 1499 transitions, 27603 flow [2023-08-24 02:33:32,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=22921, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1004, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=27603, PETRI_PLACES=262, PETRI_TRANSITIONS=1499} [2023-08-24 02:33:32,765 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 230 predicate places. [2023-08-24 02:33:32,765 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 1499 transitions, 27603 flow [2023-08-24 02:33:32,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 151.53333333333333) internal successors, (2273), 15 states have internal predecessors, (2273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:32,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:33:32,766 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:33:32,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 02:33:32,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 02:33:32,969 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:33:32,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:33:32,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1820641561, now seen corresponding path program 9 times [2023-08-24 02:33:32,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:33:32,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553948705] [2023-08-24 02:33:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:33:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:33:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:33:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:33:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:33:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553948705] [2023-08-24 02:33:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553948705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:33:36,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030219054] [2023-08-24 02:33:36,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 02:33:36,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:33:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:33:36,160 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:33:36,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 02:33:36,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-24 02:33:36,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:33:36,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-24 02:33:36,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:33:36,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:33:36,337 INFO L322 Elim1Store]: treesize reduction 63, result has 32.3 percent of original size [2023-08-24 02:33:36,338 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 35 [2023-08-24 02:33:36,424 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 02:33:36,425 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2023-08-24 02:33:36,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:33:36,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-24 02:33:36,899 INFO L322 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-08-24 02:33:36,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 40 [2023-08-24 02:33:36,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-24 02:33:36,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 02:33:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030219054] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 02:33:36,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 02:33:36,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15] total 24 [2023-08-24 02:33:36,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611074588] [2023-08-24 02:33:36,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 02:33:36,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 02:33:36,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:33:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 02:33:36,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2023-08-24 02:33:36,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 407 [2023-08-24 02:33:36,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1499 transitions, 27603 flow. Second operand has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:36,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:33:36,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 407 [2023-08-24 02:33:36,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:33:46,524 INFO L124 PetriNetUnfolderBase]: 21944/33132 cut-off events. [2023-08-24 02:33:46,524 INFO L125 PetriNetUnfolderBase]: For 825298/825298 co-relation queries the response was YES. [2023-08-24 02:33:46,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324769 conditions, 33132 events. 21944/33132 cut-off events. For 825298/825298 co-relation queries the response was YES. Maximal size of possible extension queue 1569. Compared 230459 event pairs, 3515 based on Foata normal form. 2/29267 useless extension candidates. Maximal degree in co-relation 324691. Up to 32388 conditions per place. [2023-08-24 02:33:47,056 INFO L140 encePairwiseOnDemand]: 396/407 looper letters, 1455 selfloop transitions, 32 changer transitions 33/1522 dead transitions. [2023-08-24 02:33:47,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1522 transitions, 30808 flow [2023-08-24 02:33:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 02:33:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 02:33:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1348 transitions. [2023-08-24 02:33:47,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312039312039312 [2023-08-24 02:33:47,059 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1348 transitions. [2023-08-24 02:33:47,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1348 transitions. [2023-08-24 02:33:47,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:33:47,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1348 transitions. [2023-08-24 02:33:47,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 134.8) internal successors, (1348), 10 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:47,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 407.0) internal successors, (4477), 11 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:47,063 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 407.0) internal successors, (4477), 11 states have internal predecessors, (4477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:47,063 INFO L175 Difference]: Start difference. First operand has 262 places, 1499 transitions, 27603 flow. Second operand 10 states and 1348 transitions. [2023-08-24 02:33:47,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1522 transitions, 30808 flow [2023-08-24 02:33:55,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 1522 transitions, 29723 flow, removed 276 selfloop flow, removed 19 redundant places. [2023-08-24 02:33:55,309 INFO L231 Difference]: Finished difference. Result has 234 places, 1485 transitions, 26300 flow [2023-08-24 02:33:55,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=26518, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=26300, PETRI_PLACES=234, PETRI_TRANSITIONS=1485} [2023-08-24 02:33:55,310 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 202 predicate places. [2023-08-24 02:33:55,310 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 1485 transitions, 26300 flow [2023-08-24 02:33:55,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 131.0) internal successors, (1441), 11 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:55,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:33:55,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2023-08-24 02:33:55,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 02:33:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:33:55,513 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:33:55,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:33:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1085109195, now seen corresponding path program 1 times [2023-08-24 02:33:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:33:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420943071] [2023-08-24 02:33:55,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:33:55,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:33:55,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:33:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:33:55,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:33:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420943071] [2023-08-24 02:33:55,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420943071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:33:55,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597692843] [2023-08-24 02:33:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:33:55,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:33:55,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:33:55,637 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:33:55,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 02:33:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:33:55,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 02:33:55,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:33:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:33:55,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:33:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 02:33:55,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597692843] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 02:33:55,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 02:33:55,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 02:33:55,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299492403] [2023-08-24 02:33:55,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 02:33:55,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 02:33:55,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 02:33:55,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 02:33:55,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-24 02:33:55,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 407 [2023-08-24 02:33:55,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 1485 transitions, 26300 flow. Second operand has 12 states, 12 states have (on average 153.5) internal successors, (1842), 12 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:33:55,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 02:33:55,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 407 [2023-08-24 02:33:55,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 02:34:03,501 INFO L124 PetriNetUnfolderBase]: 17102/26475 cut-off events. [2023-08-24 02:34:03,501 INFO L125 PetriNetUnfolderBase]: For 677534/677540 co-relation queries the response was YES. [2023-08-24 02:34:03,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262108 conditions, 26475 events. 17102/26475 cut-off events. For 677534/677540 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 189136 event pairs, 3185 based on Foata normal form. 1992/25026 useless extension candidates. Maximal degree in co-relation 262040. Up to 14820 conditions per place. [2023-08-24 02:34:03,878 INFO L140 encePairwiseOnDemand]: 400/407 looper letters, 607 selfloop transitions, 14 changer transitions 817/1441 dead transitions. [2023-08-24 02:34:03,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1441 transitions, 28863 flow [2023-08-24 02:34:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 02:34:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 02:34:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1403 transitions. [2023-08-24 02:34:03,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38301938301938304 [2023-08-24 02:34:03,880 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1403 transitions. [2023-08-24 02:34:03,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1403 transitions. [2023-08-24 02:34:03,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 02:34:03,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1403 transitions. [2023-08-24 02:34:03,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 155.88888888888889) internal successors, (1403), 9 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:03,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:03,885 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 407.0) internal successors, (4070), 10 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:03,885 INFO L175 Difference]: Start difference. First operand has 234 places, 1485 transitions, 26300 flow. Second operand 9 states and 1403 transitions. [2023-08-24 02:34:03,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1441 transitions, 28863 flow [2023-08-24 02:34:08,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 1441 transitions, 28355 flow, removed 235 selfloop flow, removed 11 redundant places. [2023-08-24 02:34:08,430 INFO L231 Difference]: Finished difference. Result has 213 places, 624 transitions, 11080 flow [2023-08-24 02:34:08,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=407, PETRI_DIFFERENCE_MINUEND_FLOW=19873, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11080, PETRI_PLACES=213, PETRI_TRANSITIONS=624} [2023-08-24 02:34:08,432 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 181 predicate places. [2023-08-24 02:34:08,432 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 624 transitions, 11080 flow [2023-08-24 02:34:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 153.5) internal successors, (1842), 12 states have internal predecessors, (1842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 02:34:08,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 02:34:08,432 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 02:34:08,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 02:34:08,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:34:08,638 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 02:34:08,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 02:34:08,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1178708335, now seen corresponding path program 2 times [2023-08-24 02:34:08,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 02:34:08,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40452211] [2023-08-24 02:34:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 02:34:08,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 02:34:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 02:34:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:34:10,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 02:34:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40452211] [2023-08-24 02:34:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40452211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 02:34:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423054401] [2023-08-24 02:34:10,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 02:34:10,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:34:10,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 02:34:10,147 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 02:34:10,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 02:34:10,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 02:34:10,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 02:34:10,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-24 02:34:10,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 02:34:10,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:34:10,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:34:10,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 02:34:10,382 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 02:34:10,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 02:34:10,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-24 02:34:10,575 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 02:34:10,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 02:34:10,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:34:10,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:34:10,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:34:10,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:34:10,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 02:34:11,447 INFO L322 Elim1Store]: treesize reduction 79, result has 1.3 percent of original size [2023-08-24 02:34:11,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 19 [2023-08-24 02:34:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 02:34:11,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 02:34:31,340 WARN L234 SmtUtils]: Spent 9.03s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 02:34:35,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:34:35,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 250 treesize of output 178 [2023-08-24 02:34:35,758 INFO L322 Elim1Store]: treesize reduction 12, result has 94.2 percent of original size [2023-08-24 02:34:35,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30720268 treesize of output 29637838 [2023-08-24 02:34:37,062 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:34:37,168 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:34:37,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 15176 treesize of output 14514 [2023-08-24 02:34:37,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:34:37,548 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:34:37,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 14340 treesize of output 14096 [2023-08-24 02:34:37,825 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:34:37,960 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:34:37,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 13945 treesize of output 12447 [2023-08-24 02:34:38,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 02:34:38,395 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 02:34:38,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 12396 treesize of output 9226 Received shutdown request... [2023-08-24 02:40:59,052 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 02:40:59,054 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 02:40:59,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 02:40:59,093 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:40:59,095 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 02:40:59,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 02:40:59,254 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 69ms.. [2023-08-24 02:40:59,256 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 02:40:59,256 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 02:40:59,256 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 02:40:59,257 INFO L445 BasicCegarLoop]: Path program histogram: [9, 5, 2, 1, 1, 1, 1, 1] [2023-08-24 02:40:59,260 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 02:40:59,260 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 02:40:59,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 02:40:59 BasicIcfg [2023-08-24 02:40:59,265 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 02:40:59,266 INFO L158 Benchmark]: Toolchain (without parser) took 809457.70ms. Allocated memory was 331.4MB in the beginning and 8.7GB in the end (delta: 8.4GB). Free memory was 308.6MB in the beginning and 2.6GB in the end (delta: -2.2GB). Peak memory consumption was 7.7GB. Max. memory is 16.0GB. [2023-08-24 02:40:59,266 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 331.4MB. Free memory is still 307.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 02:40:59,266 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.40ms. Allocated memory is still 331.4MB. Free memory was 308.1MB in the beginning and 296.0MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 02:40:59,267 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.82ms. Allocated memory is still 331.4MB. Free memory was 296.0MB in the beginning and 293.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:40:59,269 INFO L158 Benchmark]: Boogie Preprocessor took 48.89ms. Allocated memory is still 331.4MB. Free memory was 293.9MB in the beginning and 291.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 02:40:59,269 INFO L158 Benchmark]: RCFGBuilder took 681.79ms. Allocated memory is still 331.4MB. Free memory was 291.8MB in the beginning and 257.8MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-24 02:40:59,269 INFO L158 Benchmark]: TraceAbstraction took 808373.44ms. Allocated memory was 331.4MB in the beginning and 8.7GB in the end (delta: 8.4GB). Free memory was 256.8MB in the beginning and 2.6GB in the end (delta: -2.3GB). Peak memory consumption was 7.7GB. Max. memory is 16.0GB. [2023-08-24 02:40:59,274 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 331.4MB. Free memory is still 307.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 284.40ms. Allocated memory is still 331.4MB. Free memory was 308.1MB in the beginning and 296.0MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 63.82ms. Allocated memory is still 331.4MB. Free memory was 296.0MB in the beginning and 293.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 48.89ms. Allocated memory is still 331.4MB. Free memory was 293.9MB in the beginning and 291.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 681.79ms. Allocated memory is still 331.4MB. Free memory was 291.8MB in the beginning and 257.8MB in the end (delta: 34.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 808373.44ms. Allocated memory was 331.4MB in the beginning and 8.7GB in the end (delta: 8.4GB). Free memory was 256.8MB in the beginning and 2.6GB in the end (delta: -2.3GB). Peak memory consumption was 7.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.3s, 183 PlacesBefore, 32 PlacesAfterwards, 191 TransitionsBefore, 28 TransitionsAfterwards, 1528 CoEnabledTransitionPairs, 8 FixpointIterations, 126 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 24 TrivialYvCompositions, 10 ConcurrentYvCompositions, 12 ChoiceCompositions, 203 TotalNumberOfCompositions, 2401 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1761, independent: 1694, independent conditional: 0, independent unconditional: 1694, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 877, independent: 858, independent conditional: 0, independent unconditional: 858, dependent: 19, dependent conditional: 0, dependent unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1761, independent: 836, independent conditional: 0, independent unconditional: 836, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 877, unknown conditional: 0, unknown unconditional: 877] , Statistics on independence cache: Total cache size (in pairs): 61, Positive cache size: 55, Positive conditional cache size: 0, Positive unconditional cache size: 55, Negative cache size: 6, Negative conditional cache size: 0, Negative unconditional cache size: 6, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 69ms.. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 69ms.. - TimeoutResultAtElement [Line: 120]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 69ms.. - TimeoutResultAtElement [Line: 121]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 30 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 69ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 218 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 808.2s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 141.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.4s, HoareTripleCheckerStatistics: 279 mSolverCounterUnknown, 2190 SdHoareTripleChecker+Valid, 21.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2190 mSDsluCounter, 366 SdHoareTripleChecker+Invalid, 20.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2857 IncrementalHoareTripleChecker+Unchecked, 334 mSDsCounter, 577 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 11723 IncrementalHoareTripleChecker+Invalid, 15436 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 577 mSolverCounterUnsat, 32 mSDtfsCounter, 11723 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 960 GetRequests, 449 SyntacticMatches, 19 SemanticMatches, 492 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 3694 ImplicationChecksByTransitivity, 45.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27603occurred in iteration=18, InterpolantAutomatonStates: 305, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 242.5s InterpolantComputationTime, 886 NumberOfCodeBlocks, 869 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 1099 ConstructedInterpolants, 79 QuantifiedInterpolants, 22025 SizeOfPredicates, 214 NumberOfNonLiveVariables, 4588 ConjunctsInSsa, 554 ConjunctsInUnsatCore, 45 InterpolantComputations, 10 PerfectInterpolantSequences, 95/203 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown