/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 06:45:05,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 06:45:05,127 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 06:45:05,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 06:45:05,134 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 06:45:05,173 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 06:45:05,174 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 06:45:05,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 06:45:05,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 06:45:05,179 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 06:45:05,179 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 06:45:05,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 06:45:05,180 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 06:45:05,181 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 06:45:05,181 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 06:45:05,182 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 06:45:05,182 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 06:45:05,182 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 06:45:05,183 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 06:45:05,183 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 06:45:05,183 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 06:45:05,183 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 06:45:05,184 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 06:45:05,184 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 06:45:05,185 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 06:45:05,185 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 06:45:05,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 06:45:05,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:05,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 06:45:05,186 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 06:45:05,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 06:45:05,187 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 06:45:05,187 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 06:45:05,187 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 06:45:05,188 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 06:45:05,188 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 06:45:05,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 06:45:05,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 06:45:05,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 06:45:05,574 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 06:45:05,575 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 06:45:05,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-24 06:45:06,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 06:45:07,150 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 06:45:07,151 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-08-24 06:45:07,180 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42905e9fd/5580deded1e8421f854e17d55d2f4944/FLAG210a9d971 [2023-08-24 06:45:07,199 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42905e9fd/5580deded1e8421f854e17d55d2f4944 [2023-08-24 06:45:07,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 06:45:07,205 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 06:45:07,208 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:07,209 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 06:45:07,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 06:45:07,213 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:07,214 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd8de0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07, skipping insertion in model container [2023-08-24 06:45:07,214 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:07,273 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 06:45:07,717 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-08-24 06:45:07,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:07,779 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 06:45:07,805 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:07,807 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 06:45:07,813 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 06:45:07,828 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2023-08-24 06:45:07,856 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 06:45:07,924 INFO L206 MainTranslator]: Completed translation [2023-08-24 06:45:07,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07 WrapperNode [2023-08-24 06:45:07,924 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 06:45:07,926 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:07,926 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 06:45:07,926 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 06:45:07,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:07,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,006 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 193 [2023-08-24 06:45:08,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 06:45:08,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 06:45:08,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 06:45:08,008 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 06:45:08,016 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,036 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,044 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 06:45:08,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 06:45:08,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 06:45:08,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 06:45:08,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (1/1) ... [2023-08-24 06:45:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 06:45:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:08,096 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 06:45:08,106 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 06:45:08,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 06:45:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 06:45:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 06:45:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 06:45:08,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 06:45:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 06:45:08,135 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 06:45:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 06:45:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 06:45:08,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 06:45:08,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 06:45:08,138 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 06:45:08,255 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 06:45:08,257 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 06:45:08,526 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 06:45:08,533 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 06:45:08,533 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-24 06:45:08,535 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:08 BoogieIcfgContainer [2023-08-24 06:45:08,535 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 06:45:08,537 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 06:45:08,537 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 06:45:08,540 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 06:45:08,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 06:45:07" (1/3) ... [2023-08-24 06:45:08,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a364b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:08, skipping insertion in model container [2023-08-24 06:45:08,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 06:45:07" (2/3) ... [2023-08-24 06:45:08,541 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a364b9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 06:45:08, skipping insertion in model container [2023-08-24 06:45:08,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 06:45:08" (3/3) ... [2023-08-24 06:45:08,542 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-08-24 06:45:08,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 06:45:08,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-24 06:45:08,558 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 06:45:08,618 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 06:45:08,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 193 transitions, 394 flow [2023-08-24 06:45:08,718 INFO L124 PetriNetUnfolderBase]: 45/265 cut-off events. [2023-08-24 06:45:08,718 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-24 06:45:08,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 265 events. 45/265 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 847 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 06:45:08,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 193 transitions, 394 flow [2023-08-24 06:45:08,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 188 transitions, 381 flow [2023-08-24 06:45:08,733 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:08,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-24 06:45:08,744 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 188 transitions, 381 flow [2023-08-24 06:45:08,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 188 transitions, 381 flow [2023-08-24 06:45:08,821 INFO L124 PetriNetUnfolderBase]: 44/260 cut-off events. [2023-08-24 06:45:08,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:08,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 260 events. 44/260 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 811 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-08-24 06:45:08,834 INFO L119 LiptonReduction]: Number of co-enabled transitions 10608 [2023-08-24 06:45:11,732 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-08-24 06:45:11,733 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-08-24 06:45:11,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:11,751 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;@5203145e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:11,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:11,757 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:11,757 INFO L124 PetriNetUnfolderBase]: 12/42 cut-off events. [2023-08-24 06:45:11,757 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:11,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:11,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-24 06:45:11,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:11,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 505591852, now seen corresponding path program 1 times [2023-08-24 06:45:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:11,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835738431] [2023-08-24 06:45:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:11,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:12,003 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 06:45:12,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:12,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835738431] [2023-08-24 06:45:12,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835738431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:12,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:12,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835817331] [2023-08-24 06:45:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:12,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:12,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:12,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:12,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 06:45:12,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 66 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 06:45:12,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:12,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 06:45:12,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:12,226 INFO L124 PetriNetUnfolderBase]: 300/656 cut-off events. [2023-08-24 06:45:12,226 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1250 conditions, 656 events. 300/656 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3225 event pairs, 266 based on Foata normal form. 108/654 useless extension candidates. Maximal degree in co-relation 1194. Up to 588 conditions per place. [2023-08-24 06:45:12,230 INFO L140 encePairwiseOnDemand]: 325/349 looper letters, 20 selfloop transitions, 2 changer transitions 19/46 dead transitions. [2023-08-24 06:45:12,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 173 flow [2023-08-24 06:45:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-24 06:45:12,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.498567335243553 [2023-08-24 06:45:12,249 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-24 06:45:12,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-24 06:45:12,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:12,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-24 06:45:12,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 06:45:12,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 06:45:12,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 06:45:12,269 INFO L175 Difference]: Start difference. First operand has 45 places, 66 transitions, 137 flow. Second operand 3 states and 522 transitions. [2023-08-24 06:45:12,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 173 flow [2023-08-24 06:45:12,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 173 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:45:12,275 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 69 flow [2023-08-24 06:45:12,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-08-24 06:45:12,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2023-08-24 06:45:12,281 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 69 flow [2023-08-24 06:45:12,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 06:45:12,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:12,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:12,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 06:45:12,283 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:12,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:12,291 INFO L85 PathProgramCache]: Analyzing trace with hash -139929513, now seen corresponding path program 1 times [2023-08-24 06:45:12,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:12,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177789680] [2023-08-24 06:45:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:12,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:12,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:12,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177789680] [2023-08-24 06:45:12,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177789680] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146894994] [2023-08-24 06:45:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:12,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:12,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:12,396 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 06:45:12,405 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 06:45:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:12,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:12,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:12,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:12,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146894994] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:12,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:12,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:45:12,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030177403] [2023-08-24 06:45:12,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:12,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:45:12,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:12,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:45:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:45:12,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 06:45:12,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 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 06:45:12,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:12,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 06:45:12,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:12,646 INFO L124 PetriNetUnfolderBase]: 47/128 cut-off events. [2023-08-24 06:45:12,647 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 06:45:12,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 128 events. 47/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 42 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 243. Up to 108 conditions per place. [2023-08-24 06:45:12,648 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 20 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2023-08-24 06:45:12,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 131 flow [2023-08-24 06:45:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 952 transitions. [2023-08-24 06:45:12,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45463228271251194 [2023-08-24 06:45:12,651 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 952 transitions. [2023-08-24 06:45:12,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 952 transitions. [2023-08-24 06:45:12,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:12,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 952 transitions. [2023-08-24 06:45:12,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.66666666666666) internal successors, (952), 6 states have internal predecessors, (952), 0 states have call successors, (0), 0 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 06:45:12,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 06:45:12,658 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 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 06:45:12,658 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 69 flow. Second operand 6 states and 952 transitions. [2023-08-24 06:45:12,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 131 flow [2023-08-24 06:45:12,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:12,660 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 101 flow [2023-08-24 06:45:12,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=101, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-24 06:45:12,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -8 predicate places. [2023-08-24 06:45:12,661 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 101 flow [2023-08-24 06:45:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 155.57142857142858) internal successors, (1089), 7 states have internal predecessors, (1089), 0 states have call successors, (0), 0 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 06:45:12,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:12,662 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:12,671 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 06:45:12,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:12,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:12,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1589570284, now seen corresponding path program 2 times [2023-08-24 06:45:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:12,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950283401] [2023-08-24 06:45:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:12,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:13,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950283401] [2023-08-24 06:45:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950283401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:13,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352643183] [2023-08-24 06:45:13,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:13,045 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 06:45:13,061 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 06:45:13,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:13,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:13,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:13,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:13,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:13,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 06:45:13,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352643183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:13,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:13,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:45:13,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499815814] [2023-08-24 06:45:13,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:13,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:45:13,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:13,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:45:13,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:45:13,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 349 [2023-08-24 06:45:13,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 101 flow. Second operand has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 06:45:13,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:13,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 349 [2023-08-24 06:45:13,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:13,295 INFO L124 PetriNetUnfolderBase]: 47/134 cut-off events. [2023-08-24 06:45:13,296 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 06:45:13,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 134 events. 47/134 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 358 event pairs, 42 based on Foata normal form. 6/116 useless extension candidates. Maximal degree in co-relation 234. Up to 108 conditions per place. [2023-08-24 06:45:13,297 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 20 selfloop transitions, 11 changer transitions 0/36 dead transitions. [2023-08-24 06:45:13,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 36 transitions, 199 flow [2023-08-24 06:45:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:13,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1885 transitions. [2023-08-24 06:45:13,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45009551098376316 [2023-08-24 06:45:13,302 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1885 transitions. [2023-08-24 06:45:13,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1885 transitions. [2023-08-24 06:45:13,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:13,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1885 transitions. [2023-08-24 06:45:13,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 157.08333333333334) internal successors, (1885), 12 states have internal predecessors, (1885), 0 states have call successors, (0), 0 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 06:45:13,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 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 06:45:13,318 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 349.0) internal successors, (4537), 13 states have internal predecessors, (4537), 0 states have call successors, (0), 0 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 06:45:13,318 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 101 flow. Second operand 12 states and 1885 transitions. [2023-08-24 06:45:13,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 36 transitions, 199 flow [2023-08-24 06:45:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 36 transitions, 185 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:13,322 INFO L231 Difference]: Finished difference. Result has 53 places, 36 transitions, 171 flow [2023-08-24 06:45:13,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=171, PETRI_PLACES=53, PETRI_TRANSITIONS=36} [2023-08-24 06:45:13,324 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2023-08-24 06:45:13,324 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 36 transitions, 171 flow [2023-08-24 06:45:13,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 155.30769230769232) internal successors, (2019), 13 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 06:45:13,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:13,325 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:13,334 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 06:45:13,531 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,SelfDestructingSolverStorable2 [2023-08-24 06:45:13,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:13,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash -652451060, now seen corresponding path program 3 times [2023-08-24 06:45:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:13,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201969168] [2023-08-24 06:45:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:13,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:13,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:13,630 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:13,630 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:13,631 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:13,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 06:45:13,633 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:13,634 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:13,635 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:13,635 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 06:45:13,673 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 06:45:13,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 263 transitions, 544 flow [2023-08-24 06:45:13,722 INFO L124 PetriNetUnfolderBase]: 75/432 cut-off events. [2023-08-24 06:45:13,722 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 06:45:13,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 432 events. 75/432 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1744 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 267. Up to 12 conditions per place. [2023-08-24 06:45:13,726 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 263 transitions, 544 flow [2023-08-24 06:45:13,730 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 223 places, 263 transitions, 544 flow [2023-08-24 06:45:13,730 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:13,730 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 223 places, 263 transitions, 544 flow [2023-08-24 06:45:13,731 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 223 places, 263 transitions, 544 flow [2023-08-24 06:45:13,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 223 places, 263 transitions, 544 flow [2023-08-24 06:45:13,775 INFO L124 PetriNetUnfolderBase]: 75/432 cut-off events. [2023-08-24 06:45:13,775 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-24 06:45:13,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446 conditions, 432 events. 75/432 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1744 event pairs, 0 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 267. Up to 12 conditions per place. [2023-08-24 06:45:13,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 31960 [2023-08-24 06:45:16,900 INFO L134 LiptonReduction]: Checked pairs total: 54538 [2023-08-24 06:45:16,900 INFO L136 LiptonReduction]: Total number of compositions: 216 [2023-08-24 06:45:16,902 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:16,903 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;@5203145e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:16,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:16,911 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:16,911 INFO L124 PetriNetUnfolderBase]: 35/109 cut-off events. [2023-08-24 06:45:16,912 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 06:45:16,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:16,912 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:16,912 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:16,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash -769066612, now seen corresponding path program 1 times [2023-08-24 06:45:16,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:16,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136991150] [2023-08-24 06:45:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:16,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:16,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:16,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136991150] [2023-08-24 06:45:16,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136991150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:16,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:16,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:16,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611468431] [2023-08-24 06:45:16,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:16,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:16,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:16,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:16,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:16,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 06:45:16,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 100 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 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 06:45:16,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:16,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 06:45:16,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:18,356 INFO L124 PetriNetUnfolderBase]: 9849/15756 cut-off events. [2023-08-24 06:45:18,356 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-08-24 06:45:18,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30204 conditions, 15756 events. 9849/15756 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 104857 event pairs, 9112 based on Foata normal form. 2729/16053 useless extension candidates. Maximal degree in co-relation 12153. Up to 14349 conditions per place. [2023-08-24 06:45:18,407 INFO L140 encePairwiseOnDemand]: 445/479 looper letters, 36 selfloop transitions, 2 changer transitions 23/70 dead transitions. [2023-08-24 06:45:18,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 70 transitions, 272 flow [2023-08-24 06:45:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-24 06:45:18,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49826026443980515 [2023-08-24 06:45:18,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-24 06:45:18,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-24 06:45:18,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:18,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-24 06:45:18,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 06:45:18,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 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 06:45:18,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 479.0) internal successors, (1916), 4 states have internal predecessors, (1916), 0 states have call successors, (0), 0 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 06:45:18,414 INFO L175 Difference]: Start difference. First operand has 68 places, 100 transitions, 218 flow. Second operand 3 states and 716 transitions. [2023-08-24 06:45:18,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 70 transitions, 272 flow [2023-08-24 06:45:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 272 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:45:18,416 INFO L231 Difference]: Finished difference. Result has 71 places, 47 transitions, 116 flow [2023-08-24 06:45:18,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=71, PETRI_TRANSITIONS=47} [2023-08-24 06:45:18,417 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-24 06:45:18,418 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 47 transitions, 116 flow [2023-08-24 06:45:18,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 0 states have call successors, (0), 0 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 06:45:18,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:18,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 06:45:18,418 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:18,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1677934398, now seen corresponding path program 1 times [2023-08-24 06:45:18,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:18,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222755612] [2023-08-24 06:45:18,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:18,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222755612] [2023-08-24 06:45:18,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222755612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:18,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918843634] [2023-08-24 06:45:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:18,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:18,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:18,463 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 06:45:18,464 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 06:45:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:18,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:18,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:18,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:18,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918843634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:18,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:18,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:45:18,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669038301] [2023-08-24 06:45:18,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:18,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:45:18,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:18,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:45:18,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:45:18,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 06:45:18,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 47 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 210.71428571428572) internal successors, (1475), 7 states have internal predecessors, (1475), 0 states have call successors, (0), 0 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 06:45:18,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:18,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 06:45:18,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:18,905 INFO L124 PetriNetUnfolderBase]: 1738/2923 cut-off events. [2023-08-24 06:45:18,905 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-24 06:45:18,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5649 conditions, 2923 events. 1738/2923 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16064 event pairs, 1617 based on Foata normal form. 0/2391 useless extension candidates. Maximal degree in co-relation 5636. Up to 2647 conditions per place. [2023-08-24 06:45:18,918 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 36 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-24 06:45:18,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 210 flow [2023-08-24 06:45:18,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:18,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1298 transitions. [2023-08-24 06:45:18,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4516353514265832 [2023-08-24 06:45:18,922 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1298 transitions. [2023-08-24 06:45:18,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1298 transitions. [2023-08-24 06:45:18,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:18,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1298 transitions. [2023-08-24 06:45:18,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 216.33333333333334) internal successors, (1298), 6 states have internal predecessors, (1298), 0 states have call successors, (0), 0 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 06:45:18,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 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 06:45:18,930 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 479.0) internal successors, (3353), 7 states have internal predecessors, (3353), 0 states have call successors, (0), 0 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 06:45:18,930 INFO L175 Difference]: Start difference. First operand has 71 places, 47 transitions, 116 flow. Second operand 6 states and 1298 transitions. [2023-08-24 06:45:18,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 210 flow [2023-08-24 06:45:18,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 204 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:18,931 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 146 flow [2023-08-24 06:45:18,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2023-08-24 06:45:18,932 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2023-08-24 06:45:18,933 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 146 flow [2023-08-24 06:45:18,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 210.71428571428572) internal successors, (1475), 7 states have internal predecessors, (1475), 0 states have call successors, (0), 0 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 06:45:18,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:18,933 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:18,941 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 06:45:19,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:19,139 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:19,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1938024692, now seen corresponding path program 2 times [2023-08-24 06:45:19,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:19,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296770042] [2023-08-24 06:45:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:19,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296770042] [2023-08-24 06:45:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296770042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98411595] [2023-08-24 06:45:19,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:19,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:19,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:19,232 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 06:45:19,238 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 06:45:19,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:19,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:19,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:19,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:19,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-24 06:45:19,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98411595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:19,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:19,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:45:19,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336339310] [2023-08-24 06:45:19,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:19,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:45:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:45:19,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:45:19,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 479 [2023-08-24 06:45:19,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 146 flow. Second operand has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 0 states have call successors, (0), 0 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 06:45:19,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:19,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 479 [2023-08-24 06:45:19,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:19,686 INFO L124 PetriNetUnfolderBase]: 1738/2929 cut-off events. [2023-08-24 06:45:19,686 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-24 06:45:19,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5680 conditions, 2929 events. 1738/2929 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16080 event pairs, 1617 based on Foata normal form. 6/2404 useless extension candidates. Maximal degree in co-relation 5621. Up to 2647 conditions per place. [2023-08-24 06:45:19,703 INFO L140 encePairwiseOnDemand]: 476/479 looper letters, 36 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2023-08-24 06:45:19,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 276 flow [2023-08-24 06:45:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2561 transitions. [2023-08-24 06:45:19,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44554627696590116 [2023-08-24 06:45:19,713 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2561 transitions. [2023-08-24 06:45:19,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2561 transitions. [2023-08-24 06:45:19,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:19,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2561 transitions. [2023-08-24 06:45:19,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.41666666666666) internal successors, (2561), 12 states have internal predecessors, (2561), 0 states have call successors, (0), 0 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 06:45:19,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 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 06:45:19,730 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 479.0) internal successors, (6227), 13 states have internal predecessors, (6227), 0 states have call successors, (0), 0 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 06:45:19,730 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 146 flow. Second operand 12 states and 2561 transitions. [2023-08-24 06:45:19,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 276 flow [2023-08-24 06:45:19,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 56 transitions, 262 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:19,732 INFO L231 Difference]: Finished difference. Result has 74 places, 56 transitions, 216 flow [2023-08-24 06:45:19,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=479, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=74, PETRI_TRANSITIONS=56} [2023-08-24 06:45:19,733 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-24 06:45:19,733 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 56 transitions, 216 flow [2023-08-24 06:45:19,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 210.3846153846154) internal successors, (2735), 13 states have internal predecessors, (2735), 0 states have call successors, (0), 0 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 06:45:19,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:19,735 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-24 06:45:19,744 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 06:45:19,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:19,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:19,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1988795212, now seen corresponding path program 3 times [2023-08-24 06:45:19,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:19,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196024103] [2023-08-24 06:45:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:19,974 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:19,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:20,014 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:20,015 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:20,015 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:20,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 06:45:20,015 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:20,016 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:20,016 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:20,016 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 06:45:20,057 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 06:45:20,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 333 transitions, 696 flow [2023-08-24 06:45:20,156 INFO L124 PetriNetUnfolderBase]: 110/632 cut-off events. [2023-08-24 06:45:20,156 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 06:45:20,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 632 events. 110/632 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2794 event pairs, 1 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 440. Up to 16 conditions per place. [2023-08-24 06:45:20,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 281 places, 333 transitions, 696 flow [2023-08-24 06:45:20,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 281 places, 333 transitions, 696 flow [2023-08-24 06:45:20,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:20,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 281 places, 333 transitions, 696 flow [2023-08-24 06:45:20,175 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 281 places, 333 transitions, 696 flow [2023-08-24 06:45:20,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 281 places, 333 transitions, 696 flow [2023-08-24 06:45:20,265 INFO L124 PetriNetUnfolderBase]: 110/632 cut-off events. [2023-08-24 06:45:20,266 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-24 06:45:20,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 660 conditions, 632 events. 110/632 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2794 event pairs, 1 based on Foata normal form. 0/511 useless extension candidates. Maximal degree in co-relation 440. Up to 16 conditions per place. [2023-08-24 06:45:20,307 INFO L119 LiptonReduction]: Number of co-enabled transitions 62424 [2023-08-24 06:45:23,745 INFO L134 LiptonReduction]: Checked pairs total: 101187 [2023-08-24 06:45:23,745 INFO L136 LiptonReduction]: Total number of compositions: 267 [2023-08-24 06:45:23,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:45:23,747 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;@5203145e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:45:23,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:45:23,755 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:45:23,755 INFO L124 PetriNetUnfolderBase]: 58/176 cut-off events. [2023-08-24 06:45:23,755 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 06:45:23,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:23,756 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:23,756 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:23,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:23,756 INFO L85 PathProgramCache]: Analyzing trace with hash -337586761, now seen corresponding path program 1 times [2023-08-24 06:45:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:23,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672397358] [2023-08-24 06:45:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:23,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:23,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:23,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672397358] [2023-08-24 06:45:23,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672397358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:45:23,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:45:23,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:45:23,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688883750] [2023-08-24 06:45:23,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:45:23,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:45:23,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:23,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:45:23,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:45:23,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 06:45:23,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 129 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 06:45:23,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:23,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 06:45:23,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:45,663 INFO L124 PetriNetUnfolderBase]: 252661/348965 cut-off events. [2023-08-24 06:45:45,663 INFO L125 PetriNetUnfolderBase]: For 3589/3589 co-relation queries the response was YES. [2023-08-24 06:45:46,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681977 conditions, 348965 events. 252661/348965 cut-off events. For 3589/3589 co-relation queries the response was YES. Maximal size of possible extension queue 8439. Compared 2626064 event pairs, 240676 based on Foata normal form. 57687/354412 useless extension candidates. Maximal degree in co-relation 94389. Up to 330814 conditions per place. [2023-08-24 06:45:46,714 INFO L140 encePairwiseOnDemand]: 557/600 looper letters, 53 selfloop transitions, 2 changer transitions 24/90 dead transitions. [2023-08-24 06:45:46,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 360 flow [2023-08-24 06:45:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 06:45:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 06:45:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2023-08-24 06:45:46,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5044444444444445 [2023-08-24 06:45:46,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2023-08-24 06:45:46,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2023-08-24 06:45:46,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:46,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2023-08-24 06:45:46,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 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 06:45:46,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 06:45:46,730 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 600.0) internal successors, (2400), 4 states have internal predecessors, (2400), 0 states have call successors, (0), 0 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 06:45:46,730 INFO L175 Difference]: Start difference. First operand has 88 places, 129 transitions, 288 flow. Second operand 3 states and 908 transitions. [2023-08-24 06:45:46,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 360 flow [2023-08-24 06:45:46,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 06:45:46,738 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 163 flow [2023-08-24 06:45:46,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=163, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2023-08-24 06:45:46,740 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 3 predicate places. [2023-08-24 06:45:46,740 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 163 flow [2023-08-24 06:45:46,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 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 06:45:46,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:46,741 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:46,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 06:45:46,743 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:46,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:46,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2043340593, now seen corresponding path program 1 times [2023-08-24 06:45:46,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:46,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229881956] [2023-08-24 06:45:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:46,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:46,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:46,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:46,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229881956] [2023-08-24 06:45:46,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229881956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:46,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571543864] [2023-08-24 06:45:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:46,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:46,787 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 06:45:46,790 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 06:45:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:46,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 06:45:46,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:46,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571543864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:46,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 06:45:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710026402] [2023-08-24 06:45:46,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:46,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 06:45:46,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 06:45:46,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 06:45:46,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 06:45:46,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 163 flow. Second operand has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 0 states have call successors, (0), 0 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 06:45:46,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:46,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 06:45:46,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:50,718 INFO L124 PetriNetUnfolderBase]: 46210/64953 cut-off events. [2023-08-24 06:45:50,718 INFO L125 PetriNetUnfolderBase]: For 1816/1816 co-relation queries the response was YES. [2023-08-24 06:45:50,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127740 conditions, 64953 events. 46210/64953 cut-off events. For 1816/1816 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 432369 event pairs, 43965 based on Foata normal form. 0/53862 useless extension candidates. Maximal degree in co-relation 127726. Up to 61443 conditions per place. [2023-08-24 06:45:51,016 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 53 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-24 06:45:51,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 291 flow [2023-08-24 06:45:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 06:45:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 06:45:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1645 transitions. [2023-08-24 06:45:51,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45694444444444443 [2023-08-24 06:45:51,022 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1645 transitions. [2023-08-24 06:45:51,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1645 transitions. [2023-08-24 06:45:51,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:51,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1645 transitions. [2023-08-24 06:45:51,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.1666666666667) internal successors, (1645), 6 states have internal predecessors, (1645), 0 states have call successors, (0), 0 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 06:45:51,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:51,032 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 600.0) internal successors, (4200), 7 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 06:45:51,033 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 163 flow. Second operand 6 states and 1645 transitions. [2023-08-24 06:45:51,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 291 flow [2023-08-24 06:45:51,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 281 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:51,037 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 189 flow [2023-08-24 06:45:51,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=189, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-08-24 06:45:51,040 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -10 predicate places. [2023-08-24 06:45:51,040 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 189 flow [2023-08-24 06:45:51,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 265.85714285714283) internal successors, (1861), 7 states have internal predecessors, (1861), 0 states have call successors, (0), 0 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 06:45:51,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:51,053 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:51,059 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 06:45:51,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 06:45:51,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:51,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:51,258 INFO L85 PathProgramCache]: Analyzing trace with hash 6609847, now seen corresponding path program 2 times [2023-08-24 06:45:51,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:51,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81291911] [2023-08-24 06:45:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:51,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:51,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:45:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:51,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:45:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81291911] [2023-08-24 06:45:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81291911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 06:45:51,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932032418] [2023-08-24 06:45:51,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 06:45:51,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:51,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 06:45:51,326 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 06:45:51,329 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 06:45:51,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 06:45:51,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 06:45:51,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 06:45:51,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 06:45:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:51,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 06:45:51,477 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-24 06:45:51,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932032418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 06:45:51,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 06:45:51,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 06:45:51,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333718300] [2023-08-24 06:45:51,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 06:45:51,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 06:45:51,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:45:51,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 06:45:51,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 06:45:51,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 264 out of 600 [2023-08-24 06:45:51,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 189 flow. Second operand has 13 states, 13 states have (on average 265.46153846153845) internal successors, (3451), 13 states have internal predecessors, (3451), 0 states have call successors, (0), 0 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 06:45:51,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:45:51,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 264 of 600 [2023-08-24 06:45:51,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 06:45:55,725 INFO L124 PetriNetUnfolderBase]: 46210/64959 cut-off events. [2023-08-24 06:45:55,725 INFO L125 PetriNetUnfolderBase]: For 822/822 co-relation queries the response was YES. [2023-08-24 06:45:55,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127353 conditions, 64959 events. 46210/64959 cut-off events. For 822/822 co-relation queries the response was YES. Maximal size of possible extension queue 1958. Compared 432325 event pairs, 43965 based on Foata normal form. 6/53875 useless extension candidates. Maximal degree in co-relation 127293. Up to 61443 conditions per place. [2023-08-24 06:45:56,046 INFO L140 encePairwiseOnDemand]: 597/600 looper letters, 53 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2023-08-24 06:45:56,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 75 transitions, 353 flow [2023-08-24 06:45:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 06:45:56,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 06:45:56,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3238 transitions. [2023-08-24 06:45:56,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44972222222222225 [2023-08-24 06:45:56,054 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3238 transitions. [2023-08-24 06:45:56,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3238 transitions. [2023-08-24 06:45:56,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 06:45:56,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3238 transitions. [2023-08-24 06:45:56,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 269.8333333333333) internal successors, (3238), 12 states have internal predecessors, (3238), 0 states have call successors, (0), 0 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 06:45:56,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 600.0) internal successors, (7800), 13 states have internal predecessors, (7800), 0 states have call successors, (0), 0 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 06:45:56,072 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 600.0) internal successors, (7800), 13 states have internal predecessors, (7800), 0 states have call successors, (0), 0 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 06:45:56,073 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 189 flow. Second operand 12 states and 3238 transitions. [2023-08-24 06:45:56,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 75 transitions, 353 flow [2023-08-24 06:45:56,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 75 transitions, 339 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 06:45:56,075 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 259 flow [2023-08-24 06:45:56,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=600, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=259, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-24 06:45:56,075 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 6 predicate places. [2023-08-24 06:45:56,076 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 259 flow [2023-08-24 06:45:56,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 265.46153846153845) internal successors, (3451), 13 states have internal predecessors, (3451), 0 states have call successors, (0), 0 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 06:45:56,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:45:56,077 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-08-24 06:45:56,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 06:45:56,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 06:45:56,286 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:45:56,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:45:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1089160375, now seen corresponding path program 3 times [2023-08-24 06:45:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:45:56,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066439445] [2023-08-24 06:45:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:45:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:45:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:56,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 06:45:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 06:45:56,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 06:45:56,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 06:45:56,346 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 06:45:56,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 06:45:56,346 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-24 06:45:56,347 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-24 06:45:56,347 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 06:45:56,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 06:45:56,384 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 06:45:56,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 403 transitions, 850 flow [2023-08-24 06:45:56,515 INFO L124 PetriNetUnfolderBase]: 157/900 cut-off events. [2023-08-24 06:45:56,516 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 06:45:56,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 900 events. 157/900 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4280 event pairs, 6 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 652. Up to 32 conditions per place. [2023-08-24 06:45:56,536 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 403 transitions, 850 flow [2023-08-24 06:45:56,544 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 339 places, 403 transitions, 850 flow [2023-08-24 06:45:56,545 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 06:45:56,545 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 339 places, 403 transitions, 850 flow [2023-08-24 06:45:56,545 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 339 places, 403 transitions, 850 flow [2023-08-24 06:45:56,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 403 transitions, 850 flow [2023-08-24 06:45:56,671 INFO L124 PetriNetUnfolderBase]: 157/900 cut-off events. [2023-08-24 06:45:56,671 INFO L125 PetriNetUnfolderBase]: For 48/52 co-relation queries the response was YES. [2023-08-24 06:45:56,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 955 conditions, 900 events. 157/900 cut-off events. For 48/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 4280 event pairs, 6 based on Foata normal form. 0/734 useless extension candidates. Maximal degree in co-relation 652. Up to 32 conditions per place. [2023-08-24 06:45:56,741 INFO L119 LiptonReduction]: Number of co-enabled transitions 102544 [2023-08-24 06:46:00,704 INFO L134 LiptonReduction]: Checked pairs total: 183968 [2023-08-24 06:46:00,705 INFO L136 LiptonReduction]: Total number of compositions: 328 [2023-08-24 06:46:00,706 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 06:46:00,707 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;@5203145e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 06:46:00,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 06:46:00,721 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 06:46:00,721 INFO L124 PetriNetUnfolderBase]: 81/243 cut-off events. [2023-08-24 06:46:00,721 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 06:46:00,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 06:46:00,721 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 06:46:00,722 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 06:46:00,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 06:46:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2119415548, now seen corresponding path program 1 times [2023-08-24 06:46:00,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 06:46:00,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027784380] [2023-08-24 06:46:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 06:46:00,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 06:46:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 06:46:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-08-24 06:46:00,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 06:46:00,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027784380] [2023-08-24 06:46:00,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027784380] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 06:46:00,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 06:46:00,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 06:46:00,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796458116] [2023-08-24 06:46:00,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 06:46:00,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 06:46:00,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 06:46:00,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 06:46:00,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 06:46:00,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 731 [2023-08-24 06:46:00,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 160 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 321.6666666666667) internal successors, (965), 3 states have internal predecessors, (965), 0 states have call successors, (0), 0 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 06:46:00,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 06:46:00,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 731 [2023-08-24 06:46:00,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand