/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-subst.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:31:26,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:31:26,347 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:31:26,352 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:31:26,352 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:31:26,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:31:26,353 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:31:26,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:31:26,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:31:26,380 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:31:26,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:31:26,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:31:26,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:31:26,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:31:26,382 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:31:26,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:31:26,383 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:31:26,383 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:31:26,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:31:26,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:31:26,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:31:26,384 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:31:26,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:31:26,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:31:26,384 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:31:26,384 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:31:26,384 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:31:26,385 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:31:26,385 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:31:26,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:31:26,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:31:26,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:31:26,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:31:26,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:31:26,387 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:31:26,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:31:26,387 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:31:26,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:31:26,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:31:26,388 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:31:26,388 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:31:26,388 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:31:26,587 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:31:26,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:31:26,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:31:26,609 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:31:26,609 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:31:26,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-subst.wvr_bound2.c [2023-08-04 08:31:27,762 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:31:27,963 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:31:27,964 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-subst.wvr_bound2.c [2023-08-04 08:31:27,972 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9bc6ded3/ba37e92e47204288a9011dd13bd7bd08/FLAG6c48a1e90 [2023-08-04 08:31:27,982 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9bc6ded3/ba37e92e47204288a9011dd13bd7bd08 [2023-08-04 08:31:27,986 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:31:27,987 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:31:27,987 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:31:27,988 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:31:27,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:31:27,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:31:27" (1/1) ... [2023-08-04 08:31:27,993 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c9af03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:27, skipping insertion in model container [2023-08-04 08:31:27,993 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:31:27" (1/1) ... [2023-08-04 08:31:28,014 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:31:28,130 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-subst.wvr_bound2.c[2576,2589] [2023-08-04 08:31:28,131 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:31:28,138 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:31:28,154 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-sre-subst.wvr_bound2.c[2576,2589] [2023-08-04 08:31:28,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:31:28,164 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:31:28,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28 WrapperNode [2023-08-04 08:31:28,165 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:31:28,165 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:31:28,165 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:31:28,166 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:31:28,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,190 INFO L138 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 125 [2023-08-04 08:31:28,190 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:31:28,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:31:28,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:31:28,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:31:28,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,199 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,209 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:31:28,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:31:28,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:31:28,210 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:31:28,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (1/1) ... [2023-08-04 08:31:28,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:31:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:28,255 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) [2023-08-04 08:31:28,264 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 [2023-08-04 08:31:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:31:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:31:28,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:31:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:31:28,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:31:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:31:28,287 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:31:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:31:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:31:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:31:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:31:28,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:31:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:31:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:31:28,289 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:31:28,366 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:31:28,368 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:31:28,571 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:31:28,576 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:31:28,577 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 08:31:28,578 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:31:28 BoogieIcfgContainer [2023-08-04 08:31:28,578 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:31:28,580 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:31:28,580 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:31:28,582 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:31:28,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:31:27" (1/3) ... [2023-08-04 08:31:28,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79635749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:31:28, skipping insertion in model container [2023-08-04 08:31:28,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:31:28" (2/3) ... [2023-08-04 08:31:28,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79635749 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:31:28, skipping insertion in model container [2023-08-04 08:31:28,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:31:28" (3/3) ... [2023-08-04 08:31:28,584 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-sre-subst.wvr_bound2.c [2023-08-04 08:31:28,593 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:31:28,600 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:31:28,601 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:31:28,601 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:31:28,685 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 08:31:28,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 138 transitions, 318 flow [2023-08-04 08:31:28,919 INFO L124 PetriNetUnfolderBase]: 90/620 cut-off events. [2023-08-04 08:31:28,919 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:28,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 620 events. 90/620 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3184 event pairs, 0 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 349. Up to 16 conditions per place. [2023-08-04 08:31:28,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 138 transitions, 318 flow [2023-08-04 08:31:28,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 125 transitions, 286 flow [2023-08-04 08:31:28,942 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:28,956 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 125 transitions, 286 flow [2023-08-04 08:31:28,959 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 125 transitions, 286 flow [2023-08-04 08:31:28,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 125 transitions, 286 flow [2023-08-04 08:31:29,009 INFO L124 PetriNetUnfolderBase]: 90/533 cut-off events. [2023-08-04 08:31:29,010 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:29,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 533 events. 90/533 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2528 event pairs, 0 based on Foata normal form. 0/441 useless extension candidates. Maximal degree in co-relation 303. Up to 16 conditions per place. [2023-08-04 08:31:29,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 1332 [2023-08-04 08:31:31,160 INFO L134 LiptonReduction]: Checked pairs total: 4066 [2023-08-04 08:31:31,161 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 08:31:31,171 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:31:31,179 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=true, 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;@25676246, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:31,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:31:31,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:31,183 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:31:31,183 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:31,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:31,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:31,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:31,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -255992511, now seen corresponding path program 1 times [2023-08-04 08:31:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:31,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673957854] [2023-08-04 08:31:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:31,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:31,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:31,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673957854] [2023-08-04 08:31:31,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673957854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:31,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:31,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761097354] [2023-08-04 08:31:31,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:31,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:31,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:31,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 239 [2023-08-04 08:31:31,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:31,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 239 [2023-08-04 08:31:31,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:31,598 INFO L124 PetriNetUnfolderBase]: 399/801 cut-off events. [2023-08-04 08:31:31,599 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-04 08:31:31,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 801 events. 399/801 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3906 event pairs, 206 based on Foata normal form. 0/694 useless extension candidates. Maximal degree in co-relation 1162. Up to 741 conditions per place. [2023-08-04 08:31:31,605 INFO L140 encePairwiseOnDemand]: 235/239 looper letters, 34 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 08:31:31,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 190 flow [2023-08-04 08:31:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:31,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:31,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-04 08:31:31,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271966527196653 [2023-08-04 08:31:31,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-04 08:31:31,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-04 08:31:31,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:31,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-04 08:31:31,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,636 INFO L175 Difference]: Start difference. First operand has 36 places, 39 transitions, 114 flow. Second operand 3 states and 378 transitions. [2023-08-04 08:31:31,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 190 flow [2023-08-04 08:31:31,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 40 transitions, 178 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:31,642 INFO L231 Difference]: Finished difference. Result has 36 places, 38 transitions, 108 flow [2023-08-04 08:31:31,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=36, PETRI_TRANSITIONS=38} [2023-08-04 08:31:31,647 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2023-08-04 08:31:31,647 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 38 transitions, 108 flow [2023-08-04 08:31:31,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:31,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:31,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:31:31,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:31,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:31,649 INFO L85 PathProgramCache]: Analyzing trace with hash -148828760, now seen corresponding path program 1 times [2023-08-04 08:31:31,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:31,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898969285] [2023-08-04 08:31:31,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:31,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:31,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:31,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898969285] [2023-08-04 08:31:31,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898969285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:31,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548865668] [2023-08-04 08:31:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:31,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:31,755 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) [2023-08-04 08:31:31,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:31:31,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:31,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:31,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:31,840 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:31,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548865668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:31,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:31,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750528992] [2023-08-04 08:31:31,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:31,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:31,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:31,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 239 [2023-08-04 08:31:31,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 38 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:31,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 239 [2023-08-04 08:31:31,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:31,928 INFO L124 PetriNetUnfolderBase]: 381/767 cut-off events. [2023-08-04 08:31:31,928 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 08:31:31,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1579 conditions, 767 events. 381/767 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3565 event pairs, 207 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 901. Up to 699 conditions per place. [2023-08-04 08:31:31,931 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 35 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 08:31:31,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 190 flow [2023-08-04 08:31:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-04 08:31:31,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271966527196653 [2023-08-04 08:31:31,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-04 08:31:31,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-04 08:31:31,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:31,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-04 08:31:31,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,935 INFO L175 Difference]: Start difference. First operand has 36 places, 38 transitions, 108 flow. Second operand 3 states and 378 transitions. [2023-08-04 08:31:31,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 190 flow [2023-08-04 08:31:31,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:31,937 INFO L231 Difference]: Finished difference. Result has 37 places, 38 transitions, 112 flow [2023-08-04 08:31:31,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=38} [2023-08-04 08:31:31,937 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2023-08-04 08:31:31,938 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 38 transitions, 112 flow [2023-08-04 08:31:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:31,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:31,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:31,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:32,143 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 [2023-08-04 08:31:32,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:32,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash -922156863, now seen corresponding path program 1 times [2023-08-04 08:31:32,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:32,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116452023] [2023-08-04 08:31:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:32,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:32,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:32,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116452023] [2023-08-04 08:31:32,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116452023] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:32,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826838591] [2023-08-04 08:31:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:32,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:32,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:32,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:31:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:32,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:32,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:32,315 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826838591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:32,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:32,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:32,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069449645] [2023-08-04 08:31:32,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:32,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:32,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:32,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 239 [2023-08-04 08:31:32,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:32,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 239 [2023-08-04 08:31:32,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:32,415 INFO L124 PetriNetUnfolderBase]: 377/763 cut-off events. [2023-08-04 08:31:32,415 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 08:31:32,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1583 conditions, 763 events. 377/763 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3344 event pairs, 212 based on Foata normal form. 0/674 useless extension candidates. Maximal degree in co-relation 898. Up to 675 conditions per place. [2023-08-04 08:31:32,418 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 36 selfloop transitions, 2 changer transitions 1/42 dead transitions. [2023-08-04 08:31:32,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 198 flow [2023-08-04 08:31:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:32,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:32,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 08:31:32,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285913528591353 [2023-08-04 08:31:32,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 08:31:32,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 08:31:32,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:32,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 08:31:32,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,422 INFO L175 Difference]: Start difference. First operand has 37 places, 38 transitions, 112 flow. Second operand 3 states and 379 transitions. [2023-08-04 08:31:32,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 198 flow [2023-08-04 08:31:32,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 42 transitions, 194 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:32,423 INFO L231 Difference]: Finished difference. Result has 38 places, 38 transitions, 116 flow [2023-08-04 08:31:32,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=38} [2023-08-04 08:31:32,424 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2023-08-04 08:31:32,424 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 38 transitions, 116 flow [2023-08-04 08:31:32,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:32,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:32,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 08:31:32,629 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 [2023-08-04 08:31:32,629 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:32,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1325913694, now seen corresponding path program 1 times [2023-08-04 08:31:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026743018] [2023-08-04 08:31:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:32,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:32,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026743018] [2023-08-04 08:31:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026743018] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909648422] [2023-08-04 08:31:32,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:32,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:32,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:32,725 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) [2023-08-04 08:31:32,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:31:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:32,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:32,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:32,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:32,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909648422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:32,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:32,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:32,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878314171] [2023-08-04 08:31:32,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:32,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:32,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:32,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 239 [2023-08-04 08:31:32,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 38 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:32,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 239 [2023-08-04 08:31:32,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:32,887 INFO L124 PetriNetUnfolderBase]: 257/547 cut-off events. [2023-08-04 08:31:32,888 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 08:31:32,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1174 conditions, 547 events. 257/547 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2182 event pairs, 184 based on Foata normal form. 0/490 useless extension candidates. Maximal degree in co-relation 694. Up to 451 conditions per place. [2023-08-04 08:31:32,891 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 41 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-04 08:31:32,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 224 flow [2023-08-04 08:31:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:32,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-04 08:31:32,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341701534170153 [2023-08-04 08:31:32,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-04 08:31:32,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-04 08:31:32,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:32,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-04 08:31:32,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,903 INFO L175 Difference]: Start difference. First operand has 38 places, 38 transitions, 116 flow. Second operand 3 states and 383 transitions. [2023-08-04 08:31:32,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 224 flow [2023-08-04 08:31:32,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 46 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:31:32,907 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 124 flow [2023-08-04 08:31:32,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-04 08:31:32,909 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-08-04 08:31:32,909 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 124 flow [2023-08-04 08:31:32,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:32,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:32,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:32,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:33,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:33,116 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:33,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:33,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1596288563, now seen corresponding path program 1 times [2023-08-04 08:31:33,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287001238] [2023-08-04 08:31:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:33,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287001238] [2023-08-04 08:31:33,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287001238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:33,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083047986] [2023-08-04 08:31:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:33,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:33,204 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) [2023-08-04 08:31:33,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:31:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:33,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:33,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:31:33,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:33,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083047986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:33,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:33,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:33,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798561888] [2023-08-04 08:31:33,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:33,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:33,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:33,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:33,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:33,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 239 [2023-08-04 08:31:33,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:33,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 239 [2023-08-04 08:31:33,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:33,378 INFO L124 PetriNetUnfolderBase]: 196/442 cut-off events. [2023-08-04 08:31:33,379 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-08-04 08:31:33,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 442 events. 196/442 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1615 event pairs, 149 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 599. Up to 329 conditions per place. [2023-08-04 08:31:33,381 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 42 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 08:31:33,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 234 flow [2023-08-04 08:31:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:33,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-04 08:31:33,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341701534170153 [2023-08-04 08:31:33,383 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-04 08:31:33,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-04 08:31:33,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:33,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-04 08:31:33,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,386 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 124 flow. Second operand 3 states and 383 transitions. [2023-08-04 08:31:33,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 234 flow [2023-08-04 08:31:33,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:33,388 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 134 flow [2023-08-04 08:31:33,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2023-08-04 08:31:33,389 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-08-04 08:31:33,389 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 134 flow [2023-08-04 08:31:33,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:33,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:33,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:33,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:33,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:33,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:33,596 INFO L85 PathProgramCache]: Analyzing trace with hash -251613795, now seen corresponding path program 1 times [2023-08-04 08:31:33,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:33,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114974699] [2023-08-04 08:31:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:31:33,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:33,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114974699] [2023-08-04 08:31:33,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114974699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:33,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684902510] [2023-08-04 08:31:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:33,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:33,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:33,682 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) [2023-08-04 08:31:33,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:31:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:33,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:33,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:33,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:33,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684902510] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:33,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:33,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:33,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428559398] [2023-08-04 08:31:33,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:33,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:33,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:33,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 239 [2023-08-04 08:31:33,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:33,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 239 [2023-08-04 08:31:33,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:33,844 INFO L124 PetriNetUnfolderBase]: 189/425 cut-off events. [2023-08-04 08:31:33,844 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-04 08:31:33,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1003 conditions, 425 events. 189/425 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1522 event pairs, 171 based on Foata normal form. 0/424 useless extension candidates. Maximal degree in co-relation 628. Up to 375 conditions per place. [2023-08-04 08:31:33,846 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 36 selfloop transitions, 2 changer transitions 3/44 dead transitions. [2023-08-04 08:31:33,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 224 flow [2023-08-04 08:31:33,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 08:31:33,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285913528591353 [2023-08-04 08:31:33,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 08:31:33,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 08:31:33,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:33,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 08:31:33,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,852 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 134 flow. Second operand 3 states and 379 transitions. [2023-08-04 08:31:33,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 224 flow [2023-08-04 08:31:33,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:33,856 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 132 flow [2023-08-04 08:31:33,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-04 08:31:33,858 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-08-04 08:31:33,858 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 132 flow [2023-08-04 08:31:33,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:33,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:33,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:33,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 08:31:34,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:34,063 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:34,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:34,063 INFO L85 PathProgramCache]: Analyzing trace with hash 471464514, now seen corresponding path program 1 times [2023-08-04 08:31:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:34,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096672503] [2023-08-04 08:31:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:34,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:34,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:34,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096672503] [2023-08-04 08:31:34,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096672503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:34,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22758414] [2023-08-04 08:31:34,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:34,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:34,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:34,149 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) [2023-08-04 08:31:34,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:31:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:34,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:34,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:34,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:34,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22758414] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:34,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:34,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:31:34,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115780997] [2023-08-04 08:31:34,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:34,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:34,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 239 [2023-08-04 08:31:34,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:34,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:34,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 239 [2023-08-04 08:31:34,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:34,348 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-04 08:31:34,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:34,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 10 events. 2/10 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 23. Up to 6 conditions per place. [2023-08-04 08:31:34,348 INFO L140 encePairwiseOnDemand]: 236/239 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-04 08:31:34,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 32 flow [2023-08-04 08:31:34,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 456 transitions. [2023-08-04 08:31:34,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769874476987448 [2023-08-04 08:31:34,350 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 456 transitions. [2023-08-04 08:31:34,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 456 transitions. [2023-08-04 08:31:34,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:34,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 456 transitions. [2023-08-04 08:31:34,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:34,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:34,354 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 239.0) internal successors, (1195), 5 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:34,354 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 132 flow. Second operand 4 states and 456 transitions. [2023-08-04 08:31:34,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 32 flow [2023-08-04 08:31:34,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 7 transitions, 30 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:34,354 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 08:31:34,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=12, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 08:31:34,355 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -18 predicate places. [2023-08-04 08:31:34,355 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 08:31:34,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:34,357 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:31:34,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:34,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:34,564 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:34,566 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:31:34,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 138 transitions, 318 flow [2023-08-04 08:31:34,610 INFO L124 PetriNetUnfolderBase]: 90/620 cut-off events. [2023-08-04 08:31:34,611 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:31:34,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 681 conditions, 620 events. 90/620 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3184 event pairs, 0 based on Foata normal form. 0/520 useless extension candidates. Maximal degree in co-relation 349. Up to 16 conditions per place. [2023-08-04 08:31:34,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 138 transitions, 318 flow [2023-08-04 08:31:34,612 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 76 transitions, 167 flow [2023-08-04 08:31:34,612 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:34,613 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 08:31:34,613 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 08:31:34,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 76 transitions, 167 flow [2023-08-04 08:31:34,624 INFO L124 PetriNetUnfolderBase]: 6/172 cut-off events. [2023-08-04 08:31:34,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 172 events. 6/172 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 441 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-04 08:31:34,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 486 [2023-08-04 08:31:36,247 INFO L134 LiptonReduction]: Checked pairs total: 351 [2023-08-04 08:31:36,248 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-08-04 08:31:36,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:31:36,251 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=true, 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;@25676246, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:36,251 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:31:36,253 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:36,253 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 08:31:36,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:31:36,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:36,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 08:31:36,254 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:31:36,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:36,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1264284337, now seen corresponding path program 1 times [2023-08-04 08:31:36,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:36,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883758387] [2023-08-04 08:31:36,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:36,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:36,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:36,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883758387] [2023-08-04 08:31:36,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883758387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:36,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:36,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10959257] [2023-08-04 08:31:36,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:36,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:36,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:36,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:36,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:36,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 201 [2023-08-04 08:31:36,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 49 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:36,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:36,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 201 [2023-08-04 08:31:36,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:36,331 INFO L124 PetriNetUnfolderBase]: 45/109 cut-off events. [2023-08-04 08:31:36,332 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:31:36,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 109 events. 45/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 315 event pairs, 20 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 224. Up to 96 conditions per place. [2023-08-04 08:31:36,332 INFO L140 encePairwiseOnDemand]: 198/201 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-04 08:31:36,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 19 transitions, 85 flow [2023-08-04 08:31:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-08-04 08:31:36,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5903814262023217 [2023-08-04 08:31:36,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-08-04 08:31:36,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-08-04 08:31:36,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:36,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-08-04 08:31:36,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:36,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:36,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:36,336 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 49 flow. Second operand 3 states and 356 transitions. [2023-08-04 08:31:36,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 19 transitions, 85 flow [2023-08-04 08:31:36,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 19 transitions, 85 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:31:36,337 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 57 flow [2023-08-04 08:31:36,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-08-04 08:31:36,340 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2023-08-04 08:31:36,340 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 57 flow [2023-08-04 08:31:36,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:36,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:36,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:31:36,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:31:36,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:31:36,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1247985006, now seen corresponding path program 1 times [2023-08-04 08:31:36,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:36,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386560739] [2023-08-04 08:31:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:36,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:36,358 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:31:36,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:31:36,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:31:36,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:31:36,380 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:31:36,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:31:36,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:31:36,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 08:31:36,381 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:31:36,381 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:31:36,381 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:31:36,381 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:31:36,405 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 08:31:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 159 transitions, 408 flow [2023-08-04 08:31:36,700 INFO L124 PetriNetUnfolderBase]: 898/4312 cut-off events. [2023-08-04 08:31:36,700 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:31:36,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 4312 events. 898/4312 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 35263 event pairs, 11 based on Foata normal form. 0/3658 useless extension candidates. Maximal degree in co-relation 2509. Up to 192 conditions per place. [2023-08-04 08:31:36,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 159 transitions, 408 flow [2023-08-04 08:31:36,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 146 transitions, 370 flow [2023-08-04 08:31:36,720 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:31:36,720 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 146 transitions, 370 flow [2023-08-04 08:31:36,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 146 transitions, 370 flow [2023-08-04 08:31:36,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 146 transitions, 370 flow [2023-08-04 08:31:36,943 INFO L124 PetriNetUnfolderBase]: 898/3659 cut-off events. [2023-08-04 08:31:36,943 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2023-08-04 08:31:36,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4307 conditions, 3659 events. 898/3659 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 27493 event pairs, 11 based on Foata normal form. 0/3069 useless extension candidates. Maximal degree in co-relation 2177. Up to 192 conditions per place. [2023-08-04 08:31:36,970 INFO L119 LiptonReduction]: Number of co-enabled transitions 3204 [2023-08-04 08:31:38,527 INFO L134 LiptonReduction]: Checked pairs total: 11972 [2023-08-04 08:31:38,527 INFO L136 LiptonReduction]: Total number of compositions: 104 [2023-08-04 08:31:38,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:31:38,528 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=true, 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;@25676246, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:31:38,528 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:31:38,530 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:31:38,530 INFO L124 PetriNetUnfolderBase]: 0/26 cut-off events. [2023-08-04 08:31:38,530 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:31:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:38,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:38,530 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:38,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2048566372, now seen corresponding path program 1 times [2023-08-04 08:31:38,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:38,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509948239] [2023-08-04 08:31:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:38,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:38,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509948239] [2023-08-04 08:31:38,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509948239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:38,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:31:38,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:31:38,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646497452] [2023-08-04 08:31:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:38,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:38,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:38,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:31:38,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 263 [2023-08-04 08:31:38,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 57 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:38,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:38,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 263 [2023-08-04 08:31:38,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:40,708 INFO L124 PetriNetUnfolderBase]: 21389/32144 cut-off events. [2023-08-04 08:31:40,708 INFO L125 PetriNetUnfolderBase]: For 6602/6602 co-relation queries the response was YES. [2023-08-04 08:31:40,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67114 conditions, 32144 events. 21389/32144 cut-off events. For 6602/6602 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 203884 event pairs, 14517 based on Foata normal form. 0/29591 useless extension candidates. Maximal degree in co-relation 27104. Up to 30193 conditions per place. [2023-08-04 08:31:40,865 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 08:31:40,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 302 flow [2023-08-04 08:31:40,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 08:31:40,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335868187579215 [2023-08-04 08:31:40,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 08:31:40,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 08:31:40,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:40,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 08:31:40,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:40,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:40,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:40,868 INFO L175 Difference]: Start difference. First operand has 51 places, 57 transitions, 192 flow. Second operand 3 states and 421 transitions. [2023-08-04 08:31:40,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 302 flow [2023-08-04 08:31:40,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 290 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:31:40,895 INFO L231 Difference]: Finished difference. Result has 51 places, 57 transitions, 190 flow [2023-08-04 08:31:40,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=51, PETRI_TRANSITIONS=57} [2023-08-04 08:31:40,895 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-04 08:31:40,895 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 57 transitions, 190 flow [2023-08-04 08:31:40,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:40,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:40,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:40,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:31:40,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:40,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1907866249, now seen corresponding path program 1 times [2023-08-04 08:31:40,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:40,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868158622] [2023-08-04 08:31:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:40,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:40,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:31:40,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:40,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868158622] [2023-08-04 08:31:40,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868158622] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:40,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429782159] [2023-08-04 08:31:40,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:40,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:40,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:40,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:40,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:31:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:40,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:40,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:41,000 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:41,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429782159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:41,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:41,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:41,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658562190] [2023-08-04 08:31:41,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:41,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:41,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:41,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:41,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:41,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 263 [2023-08-04 08:31:41,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 57 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:41,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:41,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 263 [2023-08-04 08:31:41,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:42,994 INFO L124 PetriNetUnfolderBase]: 21175/31716 cut-off events. [2023-08-04 08:31:42,994 INFO L125 PetriNetUnfolderBase]: For 3922/3922 co-relation queries the response was YES. [2023-08-04 08:31:43,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66235 conditions, 31716 events. 21175/31716 cut-off events. For 3922/3922 co-relation queries the response was YES. Maximal size of possible extension queue 777. Compared 199791 event pairs, 14444 based on Foata normal form. 0/29235 useless extension candidates. Maximal degree in co-relation 66205. Up to 29819 conditions per place. [2023-08-04 08:31:43,140 INFO L140 encePairwiseOnDemand]: 260/263 looper letters, 54 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-04 08:31:43,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 62 transitions, 312 flow [2023-08-04 08:31:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:43,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:43,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-04 08:31:43,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5348542458808618 [2023-08-04 08:31:43,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-04 08:31:43,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-04 08:31:43,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:43,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-04 08:31:43,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,145 INFO L175 Difference]: Start difference. First operand has 51 places, 57 transitions, 190 flow. Second operand 3 states and 422 transitions. [2023-08-04 08:31:43,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 62 transitions, 312 flow [2023-08-04 08:31:43,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:43,150 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 200 flow [2023-08-04 08:31:43,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2023-08-04 08:31:43,151 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 08:31:43,151 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 200 flow [2023-08-04 08:31:43,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:43,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:43,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:43,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:43,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:43,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:43,358 INFO L85 PathProgramCache]: Analyzing trace with hash -309262522, now seen corresponding path program 1 times [2023-08-04 08:31:43,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:43,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22369913] [2023-08-04 08:31:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:43,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:43,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:31:43,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22369913] [2023-08-04 08:31:43,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22369913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:43,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252238601] [2023-08-04 08:31:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:43,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:43,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:43,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:43,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:31:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:43,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:43,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:43,469 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:43,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252238601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:43,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:43,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726956278] [2023-08-04 08:31:43,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:43,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:43,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:43,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:43,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:43,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 263 [2023-08-04 08:31:43,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:43,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:43,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 263 [2023-08-04 08:31:43,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:45,557 INFO L124 PetriNetUnfolderBase]: 21139/31950 cut-off events. [2023-08-04 08:31:45,558 INFO L125 PetriNetUnfolderBase]: For 2634/2634 co-relation queries the response was YES. [2023-08-04 08:31:45,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66522 conditions, 31950 events. 21139/31950 cut-off events. For 2634/2634 co-relation queries the response was YES. Maximal size of possible extension queue 864. Compared 205166 event pairs, 14389 based on Foata normal form. 0/29541 useless extension candidates. Maximal degree in co-relation 29110. Up to 29443 conditions per place. [2023-08-04 08:31:45,676 INFO L140 encePairwiseOnDemand]: 260/263 looper letters, 57 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 08:31:45,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 332 flow [2023-08-04 08:31:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-08-04 08:31:45,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373891001267427 [2023-08-04 08:31:45,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-08-04 08:31:45,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-08-04 08:31:45,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:45,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-08-04 08:31:45,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:45,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:45,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:45,686 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 200 flow. Second operand 3 states and 424 transitions. [2023-08-04 08:31:45,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 332 flow [2023-08-04 08:31:45,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:45,689 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 210 flow [2023-08-04 08:31:45,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-04 08:31:45,690 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-04 08:31:45,690 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 210 flow [2023-08-04 08:31:45,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:45,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:45,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:45,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:45,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 08:31:45,916 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:45,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1957669185, now seen corresponding path program 1 times [2023-08-04 08:31:45,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:45,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956287974] [2023-08-04 08:31:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:45,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:31:45,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:45,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956287974] [2023-08-04 08:31:45,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956287974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:45,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128268719] [2023-08-04 08:31:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:45,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:45,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:45,954 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:45,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:31:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:46,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:46,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:46,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:46,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128268719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:46,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:46,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:46,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583148286] [2023-08-04 08:31:46,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:46,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:46,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:46,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:46,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 263 [2023-08-04 08:31:46,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:46,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:46,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 263 [2023-08-04 08:31:46,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:48,205 INFO L124 PetriNetUnfolderBase]: 20051/30582 cut-off events. [2023-08-04 08:31:48,205 INFO L125 PetriNetUnfolderBase]: For 2910/2910 co-relation queries the response was YES. [2023-08-04 08:31:48,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64379 conditions, 30582 events. 20051/30582 cut-off events. For 2910/2910 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 198186 event pairs, 14329 based on Foata normal form. 0/28581 useless extension candidates. Maximal degree in co-relation 30626. Up to 25511 conditions per place. [2023-08-04 08:31:48,361 INFO L140 encePairwiseOnDemand]: 260/263 looper letters, 65 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 08:31:48,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 387 flow [2023-08-04 08:31:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:48,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:48,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-04 08:31:48,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462610899873257 [2023-08-04 08:31:48,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-04 08:31:48,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-04 08:31:48,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:48,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-04 08:31:48,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:48,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:48,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:48,369 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 210 flow. Second operand 3 states and 431 transitions. [2023-08-04 08:31:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 387 flow [2023-08-04 08:31:48,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:48,375 INFO L231 Difference]: Finished difference. Result has 57 places, 60 transitions, 220 flow [2023-08-04 08:31:48,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=57, PETRI_TRANSITIONS=60} [2023-08-04 08:31:48,376 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 08:31:48,376 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 60 transitions, 220 flow [2023-08-04 08:31:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:48,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:48,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:48,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:48,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 08:31:48,581 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:48,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:48,582 INFO L85 PathProgramCache]: Analyzing trace with hash -894081877, now seen corresponding path program 1 times [2023-08-04 08:31:48,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:48,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432673333] [2023-08-04 08:31:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:48,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:31:48,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:48,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432673333] [2023-08-04 08:31:48,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432673333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:48,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949731456] [2023-08-04 08:31:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:48,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:48,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:48,633 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:48,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:31:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:48,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:48,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:31:48,729 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:48,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949731456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:48,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:48,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:48,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116608747] [2023-08-04 08:31:48,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:48,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:48,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:48,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 263 [2023-08-04 08:31:48,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 60 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:48,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:48,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 263 [2023-08-04 08:31:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:50,568 INFO L124 PetriNetUnfolderBase]: 19362/30057 cut-off events. [2023-08-04 08:31:50,568 INFO L125 PetriNetUnfolderBase]: For 4852/4852 co-relation queries the response was YES. [2023-08-04 08:31:50,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65877 conditions, 30057 events. 19362/30057 cut-off events. For 4852/4852 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 196637 event pairs, 13038 based on Foata normal form. 0/29105 useless extension candidates. Maximal degree in co-relation 33872. Up to 22127 conditions per place. [2023-08-04 08:31:50,715 INFO L140 encePairwiseOnDemand]: 260/263 looper letters, 66 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2023-08-04 08:31:50,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 399 flow [2023-08-04 08:31:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:50,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:50,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-04 08:31:50,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462610899873257 [2023-08-04 08:31:50,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-04 08:31:50,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-04 08:31:50,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:50,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-04 08:31:50,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:50,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:50,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:50,720 INFO L175 Difference]: Start difference. First operand has 57 places, 60 transitions, 220 flow. Second operand 3 states and 431 transitions. [2023-08-04 08:31:50,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 399 flow [2023-08-04 08:31:50,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 397 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:50,734 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 230 flow [2023-08-04 08:31:50,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-04 08:31:50,735 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 8 predicate places. [2023-08-04 08:31:50,735 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 230 flow [2023-08-04 08:31:50,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:50,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:50,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:50,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 08:31:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:31:50,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:50,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash -953785016, now seen corresponding path program 1 times [2023-08-04 08:31:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:50,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415027957] [2023-08-04 08:31:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:50,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:31:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415027957] [2023-08-04 08:31:50,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415027957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:50,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685785796] [2023-08-04 08:31:50,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:50,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:50,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:50,997 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:51,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:31:51,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:51,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:31:51,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:51,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:31:51,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685785796] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:31:51,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:31:51,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:31:51,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697187747] [2023-08-04 08:31:51,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:31:51,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:31:51,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:51,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:31:51,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:51,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 263 [2023-08-04 08:31:51,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:51,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 263 [2023-08-04 08:31:51,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:54,137 INFO L124 PetriNetUnfolderBase]: 19153/29980 cut-off events. [2023-08-04 08:31:54,137 INFO L125 PetriNetUnfolderBase]: For 5944/5944 co-relation queries the response was YES. [2023-08-04 08:31:54,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67798 conditions, 29980 events. 19153/29980 cut-off events. For 5944/5944 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 195240 event pairs, 14429 based on Foata normal form. 0/29741 useless extension candidates. Maximal degree in co-relation 35842. Up to 24281 conditions per place. [2023-08-04 08:31:54,283 INFO L140 encePairwiseOnDemand]: 260/263 looper letters, 67 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 08:31:54,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 75 transitions, 411 flow [2023-08-04 08:31:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:31:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:31:54,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-04 08:31:54,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462610899873257 [2023-08-04 08:31:54,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-04 08:31:54,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-04 08:31:54,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:54,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-04 08:31:54,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:54,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:54,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 263.0) internal successors, (1052), 4 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:54,287 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 230 flow. Second operand 3 states and 431 transitions. [2023-08-04 08:31:54,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 75 transitions, 411 flow [2023-08-04 08:31:54,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:54,443 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 240 flow [2023-08-04 08:31:54,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2023-08-04 08:31:54,443 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 08:31:54,443 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 240 flow [2023-08-04 08:31:54,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:54,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:54,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:54,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:31:54,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 08:31:54,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:54,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:54,648 INFO L85 PathProgramCache]: Analyzing trace with hash -14380428, now seen corresponding path program 1 times [2023-08-04 08:31:54,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:54,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922871752] [2023-08-04 08:31:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:54,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:54,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922871752] [2023-08-04 08:31:54,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922871752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:54,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226856400] [2023-08-04 08:31:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:54,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:54,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:54,718 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:54,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:31:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:54,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:54,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:54,800 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:54,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:31:54,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226856400] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:54,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:54,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:31:54,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636641276] [2023-08-04 08:31:54,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:54,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:54,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:54,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:54,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:54,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-04 08:31:54,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 240 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:54,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:54,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-04 08:31:54,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:57,008 INFO L124 PetriNetUnfolderBase]: 17997/28142 cut-off events. [2023-08-04 08:31:57,009 INFO L125 PetriNetUnfolderBase]: For 5479/5479 co-relation queries the response was YES. [2023-08-04 08:31:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64441 conditions, 28142 events. 17997/28142 cut-off events. For 5479/5479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 184273 event pairs, 10395 based on Foata normal form. 2/28140 useless extension candidates. Maximal degree in co-relation 48888. Up to 26179 conditions per place. [2023-08-04 08:31:57,130 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 57 selfloop transitions, 3 changer transitions 1/67 dead transitions. [2023-08-04 08:31:57,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 372 flow [2023-08-04 08:31:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:57,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2023-08-04 08:31:57,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142585551330798 [2023-08-04 08:31:57,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2023-08-04 08:31:57,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2023-08-04 08:31:57,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:57,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2023-08-04 08:31:57,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:57,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:57,137 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:57,138 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 240 flow. Second operand 4 states and 541 transitions. [2023-08-04 08:31:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 372 flow [2023-08-04 08:31:57,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 370 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:31:57,326 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 252 flow [2023-08-04 08:31:57,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-04 08:31:57,327 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 14 predicate places. [2023-08-04 08:31:57,327 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 252 flow [2023-08-04 08:31:57,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:57,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:31:57,327 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:31:57,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:31:57,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 08:31:57,532 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:31:57,532 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:31:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1607295498, now seen corresponding path program 1 times [2023-08-04 08:31:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:31:57,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977962347] [2023-08-04 08:31:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:31:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:31:57,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:31:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977962347] [2023-08-04 08:31:57,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977962347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:31:57,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155209587] [2023-08-04 08:31:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:31:57,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:31:57,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:31:57,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:31:57,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:31:57,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:31:57,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:31:57,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:31:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:31:57,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:31:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 08:31:57,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155209587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:31:57,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:31:57,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:31:57,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462288298] [2023-08-04 08:31:57,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:31:57,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:31:57,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:31:57,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:31:57,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:31:57,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-04 08:31:57,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 252 flow. Second operand has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:57,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:31:57,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-04 08:31:57,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:31:59,743 INFO L124 PetriNetUnfolderBase]: 17145/26814 cut-off events. [2023-08-04 08:31:59,743 INFO L125 PetriNetUnfolderBase]: For 4623/4623 co-relation queries the response was YES. [2023-08-04 08:31:59,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61276 conditions, 26814 events. 17145/26814 cut-off events. For 4623/4623 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 175656 event pairs, 10068 based on Foata normal form. 8/26818 useless extension candidates. Maximal degree in co-relation 45955. Up to 24835 conditions per place. [2023-08-04 08:31:59,840 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 61 selfloop transitions, 3 changer transitions 1/71 dead transitions. [2023-08-04 08:31:59,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 400 flow [2023-08-04 08:31:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:31:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:31:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2023-08-04 08:31:59,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5180608365019012 [2023-08-04 08:31:59,842 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2023-08-04 08:31:59,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2023-08-04 08:31:59,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:31:59,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2023-08-04 08:31:59,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:59,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:59,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:31:59,860 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 252 flow. Second operand 4 states and 545 transitions. [2023-08-04 08:31:59,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 400 flow [2023-08-04 08:32:00,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 390 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:00,070 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 256 flow [2023-08-04 08:32:00,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-04 08:32:00,071 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 16 predicate places. [2023-08-04 08:32:00,071 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 256 flow [2023-08-04 08:32:00,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.8) internal successors, (639), 5 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:00,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:00,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:00,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:00,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 08:32:00,272 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:00,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:00,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1952673394, now seen corresponding path program 1 times [2023-08-04 08:32:00,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:00,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117389252] [2023-08-04 08:32:00,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:00,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:32:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117389252] [2023-08-04 08:32:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117389252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809223378] [2023-08-04 08:32:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:00,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:00,379 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:00,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:32:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:00,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:00,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:32:00,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 08:32:00,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809223378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:00,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:00,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701080443] [2023-08-04 08:32:00,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:00,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:00,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:00,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:00,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:00,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-04 08:32:00,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:00,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:00,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-04 08:32:00,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:02,207 INFO L124 PetriNetUnfolderBase]: 16713/26142 cut-off events. [2023-08-04 08:32:02,207 INFO L125 PetriNetUnfolderBase]: For 4364/4364 co-relation queries the response was YES. [2023-08-04 08:32:02,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59088 conditions, 26142 events. 16713/26142 cut-off events. For 4364/4364 co-relation queries the response was YES. Maximal size of possible extension queue 702. Compared 169699 event pairs, 9727 based on Foata normal form. 32/26170 useless extension candidates. Maximal degree in co-relation 43949. Up to 23507 conditions per place. [2023-08-04 08:32:02,477 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 65 selfloop transitions, 3 changer transitions 1/75 dead transitions. [2023-08-04 08:32:02,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 75 transitions, 420 flow [2023-08-04 08:32:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-04 08:32:02,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218631178707225 [2023-08-04 08:32:02,479 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-04 08:32:02,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-04 08:32:02,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:02,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-04 08:32:02,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:02,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:02,482 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:02,482 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 256 flow. Second operand 4 states and 549 transitions. [2023-08-04 08:32:02,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 75 transitions, 420 flow [2023-08-04 08:32:02,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 410 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:02,659 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 260 flow [2023-08-04 08:32:02,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=260, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-08-04 08:32:02,660 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 18 predicate places. [2023-08-04 08:32:02,660 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 260 flow [2023-08-04 08:32:02,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:02,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:02,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:02,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 08:32:02,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:02,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:02,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1513128930, now seen corresponding path program 1 times [2023-08-04 08:32:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:02,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59345179] [2023-08-04 08:32:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:02,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59345179] [2023-08-04 08:32:02,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59345179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594748579] [2023-08-04 08:32:02,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:02,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:02,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:02,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 08:32:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:03,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:03,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:03,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 08:32:03,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594748579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:03,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:03,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:03,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363530884] [2023-08-04 08:32:03,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:03,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-04 08:32:03,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:03,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:03,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-04 08:32:03,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:04,599 INFO L124 PetriNetUnfolderBase]: 10381/16522 cut-off events. [2023-08-04 08:32:04,600 INFO L125 PetriNetUnfolderBase]: For 3584/3584 co-relation queries the response was YES. [2023-08-04 08:32:04,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37205 conditions, 16522 events. 10381/16522 cut-off events. For 3584/3584 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 100004 event pairs, 5440 based on Foata normal form. 192/16710 useless extension candidates. Maximal degree in co-relation 32048. Up to 9564 conditions per place. [2023-08-04 08:32:04,665 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 72 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-04 08:32:04,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 82 transitions, 465 flow [2023-08-04 08:32:04,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 556 transitions. [2023-08-04 08:32:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285171102661597 [2023-08-04 08:32:04,667 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 556 transitions. [2023-08-04 08:32:04,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 556 transitions. [2023-08-04 08:32:04,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:04,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 556 transitions. [2023-08-04 08:32:04,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:04,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:04,670 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:04,670 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 260 flow. Second operand 4 states and 556 transitions. [2023-08-04 08:32:04,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 82 transitions, 465 flow [2023-08-04 08:32:04,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 82 transitions, 454 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:04,769 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 270 flow [2023-08-04 08:32:04,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-08-04 08:32:04,769 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 20 predicate places. [2023-08-04 08:32:04,769 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 270 flow [2023-08-04 08:32:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.2) internal successors, (641), 5 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:04,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:04,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:04,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 08:32:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:04,975 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:04,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash 179709434, now seen corresponding path program 1 times [2023-08-04 08:32:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407814651] [2023-08-04 08:32:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:05,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407814651] [2023-08-04 08:32:05,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407814651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:05,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322539057] [2023-08-04 08:32:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:05,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:05,028 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:05,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 08:32:05,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:05,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:05,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:05,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 08:32:05,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322539057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:05,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:05,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:05,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595456507] [2023-08-04 08:32:05,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:05,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-04 08:32:05,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:05,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:05,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-04 08:32:05,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:06,027 INFO L124 PetriNetUnfolderBase]: 9421/14931 cut-off events. [2023-08-04 08:32:06,027 INFO L125 PetriNetUnfolderBase]: For 6527/6527 co-relation queries the response was YES. [2023-08-04 08:32:06,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35803 conditions, 14931 events. 9421/14931 cut-off events. For 6527/6527 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 88115 event pairs, 5948 based on Foata normal form. 233/15160 useless extension candidates. Maximal degree in co-relation 34698. Up to 8751 conditions per place. [2023-08-04 08:32:06,102 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 73 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 08:32:06,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 476 flow [2023-08-04 08:32:06,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 556 transitions. [2023-08-04 08:32:06,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285171102661597 [2023-08-04 08:32:06,104 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 556 transitions. [2023-08-04 08:32:06,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 556 transitions. [2023-08-04 08:32:06,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:06,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 556 transitions. [2023-08-04 08:32:06,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:06,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:06,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:06,106 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 270 flow. Second operand 4 states and 556 transitions. [2023-08-04 08:32:06,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 476 flow [2023-08-04 08:32:06,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:06,172 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 286 flow [2023-08-04 08:32:06,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-08-04 08:32:06,172 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 24 predicate places. [2023-08-04 08:32:06,172 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 286 flow [2023-08-04 08:32:06,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:06,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:06,173 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:06,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-08-04 08:32:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:06,377 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:06,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1287885067, now seen corresponding path program 1 times [2023-08-04 08:32:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:06,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364355066] [2023-08-04 08:32:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:06,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:06,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:06,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364355066] [2023-08-04 08:32:06,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364355066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:06,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905071039] [2023-08-04 08:32:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:06,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:06,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:06,441 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:06,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 08:32:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:06,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:32:06,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:06,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:06,551 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:32:06,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905071039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:06,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:06,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:32:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499492712] [2023-08-04 08:32:06,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:06,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:06,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:06,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 263 [2023-08-04 08:32:06,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:06,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:06,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 263 [2023-08-04 08:32:06,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:07,767 INFO L124 PetriNetUnfolderBase]: 9409/14896 cut-off events. [2023-08-04 08:32:07,767 INFO L125 PetriNetUnfolderBase]: For 7481/7481 co-relation queries the response was YES. [2023-08-04 08:32:07,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37436 conditions, 14896 events. 9409/14896 cut-off events. For 7481/7481 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 87852 event pairs, 8414 based on Foata normal form. 13/14905 useless extension candidates. Maximal degree in co-relation 36338. Up to 13454 conditions per place. [2023-08-04 08:32:07,831 INFO L140 encePairwiseOnDemand]: 259/263 looper letters, 72 selfloop transitions, 3 changer transitions 3/84 dead transitions. [2023-08-04 08:32:07,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 84 transitions, 494 flow [2023-08-04 08:32:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:32:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:32:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 556 transitions. [2023-08-04 08:32:07,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285171102661597 [2023-08-04 08:32:07,833 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 556 transitions. [2023-08-04 08:32:07,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 556 transitions. [2023-08-04 08:32:07,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:07,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 556 transitions. [2023-08-04 08:32:07,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:07,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:07,835 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 263.0) internal successors, (1315), 5 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:07,835 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 286 flow. Second operand 4 states and 556 transitions. [2023-08-04 08:32:07,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 84 transitions, 494 flow [2023-08-04 08:32:07,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 490 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:32:07,962 INFO L231 Difference]: Finished difference. Result has 79 places, 62 transitions, 284 flow [2023-08-04 08:32:07,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=284, PETRI_PLACES=79, PETRI_TRANSITIONS=62} [2023-08-04 08:32:07,962 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 28 predicate places. [2023-08-04 08:32:07,963 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 62 transitions, 284 flow [2023-08-04 08:32:07,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:07,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:07,963 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:07,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:08,168 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:08,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:08,168 INFO L85 PathProgramCache]: Analyzing trace with hash -531527593, now seen corresponding path program 1 times [2023-08-04 08:32:08,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:08,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515354715] [2023-08-04 08:32:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:09,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:09,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515354715] [2023-08-04 08:32:09,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515354715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:09,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700141330] [2023-08-04 08:32:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:09,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:09,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:09,598 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:09,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 08:32:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:09,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:32:09,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:12,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:13,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700141330] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:13,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:13,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-04 08:32:13,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022318024] [2023-08-04 08:32:13,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:32:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:32:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:32:13,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 263 [2023-08-04 08:32:13,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 62 transitions, 284 flow. Second operand has 11 states, 11 states have (on average 118.0909090909091) internal successors, (1299), 11 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:13,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:13,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 263 [2023-08-04 08:32:13,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:15,295 INFO L124 PetriNetUnfolderBase]: 13808/21714 cut-off events. [2023-08-04 08:32:15,295 INFO L125 PetriNetUnfolderBase]: For 14348/14348 co-relation queries the response was YES. [2023-08-04 08:32:15,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53890 conditions, 21714 events. 13808/21714 cut-off events. For 14348/14348 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 141600 event pairs, 1357 based on Foata normal form. 1/21572 useless extension candidates. Maximal degree in co-relation 53777. Up to 6570 conditions per place. [2023-08-04 08:32:15,365 INFO L140 encePairwiseOnDemand]: 254/263 looper letters, 160 selfloop transitions, 13 changer transitions 54/233 dead transitions. [2023-08-04 08:32:15,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 233 transitions, 1551 flow [2023-08-04 08:32:15,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:32:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:32:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1091 transitions. [2023-08-04 08:32:15,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185361216730038 [2023-08-04 08:32:15,368 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1091 transitions. [2023-08-04 08:32:15,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1091 transitions. [2023-08-04 08:32:15,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:15,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1091 transitions. [2023-08-04 08:32:15,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.375) internal successors, (1091), 8 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:15,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:15,371 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:15,372 INFO L175 Difference]: Start difference. First operand has 79 places, 62 transitions, 284 flow. Second operand 8 states and 1091 transitions. [2023-08-04 08:32:15,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 233 transitions, 1551 flow [2023-08-04 08:32:15,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 233 transitions, 1511 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-04 08:32:15,581 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 386 flow [2023-08-04 08:32:15,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=386, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-04 08:32:15,581 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 38 predicate places. [2023-08-04 08:32:15,581 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 386 flow [2023-08-04 08:32:15,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 118.0909090909091) internal successors, (1299), 11 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:15,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:15,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:15,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:15,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:15,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:15,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:15,785 INFO L85 PathProgramCache]: Analyzing trace with hash -156650771, now seen corresponding path program 2 times [2023-08-04 08:32:15,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:15,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530886610] [2023-08-04 08:32:15,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:17,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530886610] [2023-08-04 08:32:17,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530886610] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:17,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942867050] [2023-08-04 08:32:17,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:32:17,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:17,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:17,372 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:17,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 08:32:17,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:32:17,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:32:17,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:32:17,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:18,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:19,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942867050] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:19,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:19,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-04 08:32:19,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223759696] [2023-08-04 08:32:19,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:19,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 08:32:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 08:32:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-08-04 08:32:19,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 263 [2023-08-04 08:32:19,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 118.0) internal successors, (1652), 14 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:19,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:19,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 263 [2023-08-04 08:32:19,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:22,174 INFO L124 PetriNetUnfolderBase]: 15274/25583 cut-off events. [2023-08-04 08:32:22,174 INFO L125 PetriNetUnfolderBase]: For 60052/60052 co-relation queries the response was YES. [2023-08-04 08:32:22,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93037 conditions, 25583 events. 15274/25583 cut-off events. For 60052/60052 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 189388 event pairs, 2395 based on Foata normal form. 1/25477 useless extension candidates. Maximal degree in co-relation 93004. Up to 10924 conditions per place. [2023-08-04 08:32:22,356 INFO L140 encePairwiseOnDemand]: 254/263 looper letters, 136 selfloop transitions, 9 changer transitions 74/225 dead transitions. [2023-08-04 08:32:22,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 225 transitions, 1631 flow [2023-08-04 08:32:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:32:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:32:22,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1082 transitions. [2023-08-04 08:32:22,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142585551330798 [2023-08-04 08:32:22,359 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1082 transitions. [2023-08-04 08:32:22,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1082 transitions. [2023-08-04 08:32:22,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:22,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1082 transitions. [2023-08-04 08:32:22,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 135.25) internal successors, (1082), 8 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:22,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:22,363 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 263.0) internal successors, (2367), 9 states have internal predecessors, (2367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:22,363 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 386 flow. Second operand 8 states and 1082 transitions. [2023-08-04 08:32:22,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 225 transitions, 1631 flow [2023-08-04 08:32:22,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 225 transitions, 1621 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-04 08:32:22,688 INFO L231 Difference]: Finished difference. Result has 96 places, 72 transitions, 410 flow [2023-08-04 08:32:22,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=410, PETRI_PLACES=96, PETRI_TRANSITIONS=72} [2023-08-04 08:32:22,689 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 45 predicate places. [2023-08-04 08:32:22,689 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 72 transitions, 410 flow [2023-08-04 08:32:22,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 118.0) internal successors, (1652), 14 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:22,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:22,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:22,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-04 08:32:22,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:22,891 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:22,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:22,892 INFO L85 PathProgramCache]: Analyzing trace with hash -979337983, now seen corresponding path program 1 times [2023-08-04 08:32:22,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:22,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867390454] [2023-08-04 08:32:22,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:22,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:24,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:24,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867390454] [2023-08-04 08:32:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867390454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:24,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816394543] [2023-08-04 08:32:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:24,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:24,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:24,047 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:24,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 08:32:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:24,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:32:24,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:26,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:27,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816394543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:27,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:27,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-08-04 08:32:27,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44887323] [2023-08-04 08:32:27,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:27,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 08:32:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 08:32:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-04 08:32:27,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 263 [2023-08-04 08:32:27,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 72 transitions, 410 flow. Second operand has 11 states, 11 states have (on average 117.0) internal successors, (1287), 11 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:27,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:27,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 263 [2023-08-04 08:32:27,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:30,569 INFO L124 PetriNetUnfolderBase]: 17470/30584 cut-off events. [2023-08-04 08:32:30,569 INFO L125 PetriNetUnfolderBase]: For 104328/104328 co-relation queries the response was YES. [2023-08-04 08:32:30,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119292 conditions, 30584 events. 17470/30584 cut-off events. For 104328/104328 co-relation queries the response was YES. Maximal size of possible extension queue 1001. Compared 249918 event pairs, 3473 based on Foata normal form. 3/30473 useless extension candidates. Maximal degree in co-relation 119256. Up to 11093 conditions per place. [2023-08-04 08:32:30,736 INFO L140 encePairwiseOnDemand]: 254/263 looper letters, 135 selfloop transitions, 11 changer transitions 53/205 dead transitions. [2023-08-04 08:32:30,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 205 transitions, 1580 flow [2023-08-04 08:32:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:32:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:32:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 942 transitions. [2023-08-04 08:32:30,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5116784356328082 [2023-08-04 08:32:30,739 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 942 transitions. [2023-08-04 08:32:30,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 942 transitions. [2023-08-04 08:32:30,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:30,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 942 transitions. [2023-08-04 08:32:30,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.57142857142858) internal successors, (942), 7 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:30,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:30,743 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:30,743 INFO L175 Difference]: Start difference. First operand has 96 places, 72 transitions, 410 flow. Second operand 7 states and 942 transitions. [2023-08-04 08:32:30,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 205 transitions, 1580 flow [2023-08-04 08:32:31,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 205 transitions, 1498 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-04 08:32:31,365 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 469 flow [2023-08-04 08:32:31,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2023-08-04 08:32:31,366 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 47 predicate places. [2023-08-04 08:32:31,366 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 469 flow [2023-08-04 08:32:31,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 117.0) internal successors, (1287), 11 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:31,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:31,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:31,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:31,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 08:32:31,572 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:31,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:31,572 INFO L85 PathProgramCache]: Analyzing trace with hash -746689373, now seen corresponding path program 2 times [2023-08-04 08:32:31,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:31,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596818239] [2023-08-04 08:32:31,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:31,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-04 08:32:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596818239] [2023-08-04 08:32:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596818239] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392536133] [2023-08-04 08:32:32,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:32:32,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:32,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:32,507 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:32,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 08:32:32,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:32:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:32:32,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:32:32,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:32:34,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-08-04 08:32:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392536133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:35,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 19 [2023-08-04 08:32:35,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799473132] [2023-08-04 08:32:35,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:35,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 08:32:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 08:32:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2023-08-04 08:32:36,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 263 [2023-08-04 08:32:36,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 469 flow. Second operand has 19 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:36,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:36,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 263 [2023-08-04 08:32:36,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:40,622 INFO L124 PetriNetUnfolderBase]: 12096/21618 cut-off events. [2023-08-04 08:32:40,623 INFO L125 PetriNetUnfolderBase]: For 97018/97018 co-relation queries the response was YES. [2023-08-04 08:32:40,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91496 conditions, 21618 events. 12096/21618 cut-off events. For 97018/97018 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 168137 event pairs, 2025 based on Foata normal form. 84/21691 useless extension candidates. Maximal degree in co-relation 91459. Up to 9054 conditions per place. [2023-08-04 08:32:40,804 INFO L140 encePairwiseOnDemand]: 243/263 looper letters, 157 selfloop transitions, 52 changer transitions 88/300 dead transitions. [2023-08-04 08:32:40,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 300 transitions, 2437 flow [2023-08-04 08:32:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-04 08:32:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-04 08:32:40,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2638 transitions. [2023-08-04 08:32:40,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3714969722574285 [2023-08-04 08:32:40,810 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2638 transitions. [2023-08-04 08:32:40,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2638 transitions. [2023-08-04 08:32:40,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:40,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2638 transitions. [2023-08-04 08:32:40,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 97.70370370370371) internal successors, (2638), 27 states have internal predecessors, (2638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:40,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:40,823 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 263.0) internal successors, (7364), 28 states have internal predecessors, (7364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:40,823 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 469 flow. Second operand 27 states and 2638 transitions. [2023-08-04 08:32:40,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 300 transitions, 2437 flow [2023-08-04 08:32:41,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 300 transitions, 2373 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-08-04 08:32:41,164 INFO L231 Difference]: Finished difference. Result has 132 places, 114 transitions, 915 flow [2023-08-04 08:32:41,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=915, PETRI_PLACES=132, PETRI_TRANSITIONS=114} [2023-08-04 08:32:41,165 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 81 predicate places. [2023-08-04 08:32:41,165 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 114 transitions, 915 flow [2023-08-04 08:32:41,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 93.89473684210526) internal successors, (1784), 19 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:41,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:41,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:41,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-04 08:32:41,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 08:32:41,370 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:41,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:41,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1759471553, now seen corresponding path program 3 times [2023-08-04 08:32:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975933943] [2023-08-04 08:32:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:41,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:41,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:42,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:42,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975933943] [2023-08-04 08:32:42,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975933943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:42,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739286602] [2023-08-04 08:32:42,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 08:32:42,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:42,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:42,733 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:42,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 08:32:42,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 08:32:42,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:32:42,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:32:42,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:44,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-08-04 08:32:45,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739286602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:45,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:45,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-04 08:32:45,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41049756] [2023-08-04 08:32:45,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:45,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 08:32:45,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:45,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 08:32:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-04 08:32:45,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 263 [2023-08-04 08:32:45,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 114 transitions, 915 flow. Second operand has 13 states, 13 states have (on average 117.61538461538461) internal successors, (1529), 13 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:45,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:45,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 263 [2023-08-04 08:32:45,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:48,121 INFO L124 PetriNetUnfolderBase]: 7695/14307 cut-off events. [2023-08-04 08:32:48,121 INFO L125 PetriNetUnfolderBase]: For 83810/84336 co-relation queries the response was YES. [2023-08-04 08:32:48,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67278 conditions, 14307 events. 7695/14307 cut-off events. For 83810/84336 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 110183 event pairs, 1727 based on Foata normal form. 156/14400 useless extension candidates. Maximal degree in co-relation 67235. Up to 8353 conditions per place. [2023-08-04 08:32:48,190 INFO L140 encePairwiseOnDemand]: 254/263 looper letters, 86 selfloop transitions, 13 changer transitions 64/173 dead transitions. [2023-08-04 08:32:48,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 173 transitions, 1556 flow [2023-08-04 08:32:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:32:48,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:32:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 893 transitions. [2023-08-04 08:32:48,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4850624660510592 [2023-08-04 08:32:48,192 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 893 transitions. [2023-08-04 08:32:48,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 893 transitions. [2023-08-04 08:32:48,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:48,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 893 transitions. [2023-08-04 08:32:48,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.57142857142857) internal successors, (893), 7 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:48,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:48,195 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 263.0) internal successors, (2104), 8 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:48,196 INFO L175 Difference]: Start difference. First operand has 132 places, 114 transitions, 915 flow. Second operand 7 states and 893 transitions. [2023-08-04 08:32:48,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 173 transitions, 1556 flow [2023-08-04 08:32:48,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 173 transitions, 1447 flow, removed 28 selfloop flow, removed 15 redundant places. [2023-08-04 08:32:48,863 INFO L231 Difference]: Finished difference. Result has 117 places, 89 transitions, 602 flow [2023-08-04 08:32:48,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=602, PETRI_PLACES=117, PETRI_TRANSITIONS=89} [2023-08-04 08:32:48,864 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 66 predicate places. [2023-08-04 08:32:48,864 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 89 transitions, 602 flow [2023-08-04 08:32:48,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.61538461538461) internal successors, (1529), 13 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:48,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:48,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:48,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:49,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 08:32:49,070 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:32:49,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:49,070 INFO L85 PathProgramCache]: Analyzing trace with hash -51581767, now seen corresponding path program 1 times [2023-08-04 08:32:49,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:49,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498002206] [2023-08-04 08:32:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:49,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:49,745 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:32:49,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:49,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498002206] [2023-08-04 08:32:49,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498002206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:49,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502411869] [2023-08-04 08:32:49,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:49,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:49,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:49,747 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:49,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-04 08:32:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:49,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 08:32:49,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:51,287 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:51,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:32:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-08-04 08:32:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502411869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:32:52,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:32:52,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 23 [2023-08-04 08:32:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095390826] [2023-08-04 08:32:52,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:32:52,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-04 08:32:52,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-04 08:32:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2023-08-04 08:32:53,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 263 [2023-08-04 08:32:53,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 89 transitions, 602 flow. Second operand has 23 states, 23 states have (on average 95.04347826086956) internal successors, (2186), 23 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:53,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:53,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 263 [2023-08-04 08:32:53,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:56,754 INFO L124 PetriNetUnfolderBase]: 2292/4863 cut-off events. [2023-08-04 08:32:56,755 INFO L125 PetriNetUnfolderBase]: For 18290/18359 co-relation queries the response was YES. [2023-08-04 08:32:56,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20775 conditions, 4863 events. 2292/4863 cut-off events. For 18290/18359 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 34493 event pairs, 357 based on Foata normal form. 30/4867 useless extension candidates. Maximal degree in co-relation 20743. Up to 3520 conditions per place. [2023-08-04 08:32:56,772 INFO L140 encePairwiseOnDemand]: 240/263 looper letters, 0 selfloop transitions, 0 changer transitions 177/177 dead transitions. [2023-08-04 08:32:56,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 177 transitions, 1592 flow [2023-08-04 08:32:56,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-04 08:32:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-04 08:32:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3037 transitions. [2023-08-04 08:32:56,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608602661596958 [2023-08-04 08:32:56,778 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3037 transitions. [2023-08-04 08:32:56,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3037 transitions. [2023-08-04 08:32:56,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:56,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3037 transitions. [2023-08-04 08:32:56,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 94.90625) internal successors, (3037), 32 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:56,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 263.0) internal successors, (8679), 33 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:56,805 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 263.0) internal successors, (8679), 33 states have internal predecessors, (8679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:56,805 INFO L175 Difference]: Start difference. First operand has 117 places, 89 transitions, 602 flow. Second operand 32 states and 3037 transitions. [2023-08-04 08:32:56,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 177 transitions, 1592 flow [2023-08-04 08:32:56,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 177 transitions, 1444 flow, removed 35 selfloop flow, removed 7 redundant places. [2023-08-04 08:32:56,868 INFO L231 Difference]: Finished difference. Result has 135 places, 0 transitions, 0 flow [2023-08-04 08:32:56,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=263, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=0, PETRI_PLACES=135, PETRI_TRANSITIONS=0} [2023-08-04 08:32:56,869 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 84 predicate places. [2023-08-04 08:32:56,869 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 0 transitions, 0 flow [2023-08-04 08:32:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 95.04347826086956) internal successors, (2186), 23 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:56,869 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:32:56,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:57,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:57,073 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:57,074 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:32:57,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 159 transitions, 408 flow [2023-08-04 08:32:57,301 INFO L124 PetriNetUnfolderBase]: 898/4312 cut-off events. [2023-08-04 08:32:57,301 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 08:32:57,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4986 conditions, 4312 events. 898/4312 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 35263 event pairs, 11 based on Foata normal form. 0/3658 useless extension candidates. Maximal degree in co-relation 2509. Up to 192 conditions per place. [2023-08-04 08:32:57,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 159 transitions, 408 flow [2023-08-04 08:32:57,306 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 88 transitions, 212 flow [2023-08-04 08:32:57,306 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:32:57,306 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 88 transitions, 212 flow [2023-08-04 08:32:57,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 88 transitions, 212 flow [2023-08-04 08:32:57,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 88 transitions, 212 flow [2023-08-04 08:32:57,326 INFO L124 PetriNetUnfolderBase]: 12/467 cut-off events. [2023-08-04 08:32:57,326 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 08:32:57,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 467 events. 12/467 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2097 event pairs, 0 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 387. Up to 27 conditions per place. [2023-08-04 08:32:57,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 1188 [2023-08-04 08:32:58,702 INFO L134 LiptonReduction]: Checked pairs total: 1351 [2023-08-04 08:32:58,702 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-04 08:32:58,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:32:58,704 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=true, 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;@25676246, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:32:58,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 08:32:58,706 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:32:58,706 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2023-08-04 08:32:58,706 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 08:32:58,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:58,706 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:58,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:32:58,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:58,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1017408182, now seen corresponding path program 1 times [2023-08-04 08:32:58,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:58,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443439585] [2023-08-04 08:32:58,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:58,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:58,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:32:58,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:58,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443439585] [2023-08-04 08:32:58,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443439585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:32:58,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:32:58,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:32:58,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252702873] [2023-08-04 08:32:58,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:32:58,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:32:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:32:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:32:58,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 225 [2023-08-04 08:32:58,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:58,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:58,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 225 [2023-08-04 08:32:58,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:58,852 INFO L124 PetriNetUnfolderBase]: 1323/2188 cut-off events. [2023-08-04 08:32:58,853 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2023-08-04 08:32:58,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4745 conditions, 2188 events. 1323/2188 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10915 event pairs, 982 based on Foata normal form. 0/2134 useless extension candidates. Maximal degree in co-relation 2029. Up to 2006 conditions per place. [2023-08-04 08:32:58,857 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-08-04 08:32:58,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 140 flow [2023-08-04 08:32:58,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:32:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:32:58,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-04 08:32:58,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-04 08:32:58,858 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-04 08:32:58,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-04 08:32:58,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:58,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-04 08:32:58,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:58,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:58,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:58,860 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 88 flow. Second operand 3 states and 390 transitions. [2023-08-04 08:32:58,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 140 flow [2023-08-04 08:32:58,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 29 transitions, 134 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 08:32:58,861 INFO L231 Difference]: Finished difference. Result has 42 places, 27 transitions, 94 flow [2023-08-04 08:32:58,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=42, PETRI_TRANSITIONS=27} [2023-08-04 08:32:58,861 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 08:32:58,861 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 27 transitions, 94 flow [2023-08-04 08:32:58,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:58,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:58,861 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 08:32:58,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 08:32:58,861 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:32:58,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:58,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1693412870, now seen corresponding path program 1 times [2023-08-04 08:32:58,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:58,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124440715] [2023-08-04 08:32:58,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:58,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:32:58,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124440715] [2023-08-04 08:32:58,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124440715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:58,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236580838] [2023-08-04 08:32:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:58,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:58,883 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:58,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-04 08:32:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:58,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:32:58,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:32:58,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:32:58,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236580838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:32:58,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:32:58,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 08:32:58,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174389423] [2023-08-04 08:32:58,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:32:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:32:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:32:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:32:58,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 225 [2023-08-04 08:32:58,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 27 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:58,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:58,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 225 [2023-08-04 08:32:58,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:59,173 INFO L124 PetriNetUnfolderBase]: 1319/2178 cut-off events. [2023-08-04 08:32:59,173 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:32:59,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 2178 events. 1319/2178 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10867 event pairs, 756 based on Foata normal form. 4/2134 useless extension candidates. Maximal degree in co-relation 2658. Up to 1985 conditions per place. [2023-08-04 08:32:59,181 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 22 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-08-04 08:32:59,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 154 flow [2023-08-04 08:32:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:32:59,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:32:59,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 632 transitions. [2023-08-04 08:32:59,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617777777777778 [2023-08-04 08:32:59,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 632 transitions. [2023-08-04 08:32:59,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 632 transitions. [2023-08-04 08:32:59,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:59,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 632 transitions. [2023-08-04 08:32:59,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,185 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,185 INFO L175 Difference]: Start difference. First operand has 42 places, 27 transitions, 94 flow. Second operand 5 states and 632 transitions. [2023-08-04 08:32:59,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 154 flow [2023-08-04 08:32:59,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 151 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:32:59,186 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 108 flow [2023-08-04 08:32:59,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-04 08:32:59,187 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 08:32:59,187 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 108 flow [2023-08-04 08:32:59,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:59,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:59,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:59,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-04 08:32:59,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:32:59,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1513296349, now seen corresponding path program 1 times [2023-08-04 08:32:59,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:59,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536542510] [2023-08-04 08:32:59,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:59,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:32:59,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:59,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536542510] [2023-08-04 08:32:59,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536542510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:59,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817782212] [2023-08-04 08:32:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:59,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:59,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:59,436 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:59,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-04 08:32:59,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:59,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:32:59,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:32:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:32:59,532 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:32:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817782212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:32:59,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:32:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:32:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493712955] [2023-08-04 08:32:59,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:32:59,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:32:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:32:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:32:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:32:59,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 225 [2023-08-04 08:32:59,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:32:59,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 225 [2023-08-04 08:32:59,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:32:59,713 INFO L124 PetriNetUnfolderBase]: 1212/2017 cut-off events. [2023-08-04 08:32:59,714 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-04 08:32:59,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4307 conditions, 2017 events. 1212/2017 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9808 event pairs, 910 based on Foata normal form. 0/1975 useless extension candidates. Maximal degree in co-relation 1896. Up to 1773 conditions per place. [2023-08-04 08:32:59,721 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-08-04 08:32:59,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 32 transitions, 172 flow [2023-08-04 08:32:59,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:32:59,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:32:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2023-08-04 08:32:59,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807407407407408 [2023-08-04 08:32:59,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 392 transitions. [2023-08-04 08:32:59,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 392 transitions. [2023-08-04 08:32:59,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:32:59,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 392 transitions. [2023-08-04 08:32:59,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,724 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,724 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 108 flow. Second operand 3 states and 392 transitions. [2023-08-04 08:32:59,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 32 transitions, 172 flow [2023-08-04 08:32:59,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 32 transitions, 165 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 08:32:59,725 INFO L231 Difference]: Finished difference. Result has 46 places, 28 transitions, 116 flow [2023-08-04 08:32:59,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=28} [2023-08-04 08:32:59,726 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-04 08:32:59,726 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 28 transitions, 116 flow [2023-08-04 08:32:59,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:32:59,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:32:59,726 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:32:59,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-04 08:32:59,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:59,927 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:32:59,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:32:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1414090981, now seen corresponding path program 1 times [2023-08-04 08:32:59,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:32:59,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083930813] [2023-08-04 08:32:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:59,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:32:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:32:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:32:59,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:32:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083930813] [2023-08-04 08:32:59,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083930813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:32:59,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380404667] [2023-08-04 08:32:59,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:32:59,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:32:59,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:32:59,948 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:32:59,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-04 08:33:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:00,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:00,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:33:00,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 08:33:00,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380404667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:00,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:00,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:33:00,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120308247] [2023-08-04 08:33:00,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:00,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:00,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:00,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:00,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:00,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 225 [2023-08-04 08:33:00,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 28 transitions, 116 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:00,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 225 [2023-08-04 08:33:00,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:00,220 INFO L124 PetriNetUnfolderBase]: 876/1419 cut-off events. [2023-08-04 08:33:00,220 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-04 08:33:00,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3087 conditions, 1419 events. 876/1419 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6142 event pairs, 476 based on Foata normal form. 2/1409 useless extension candidates. Maximal degree in co-relation 1717. Up to 1269 conditions per place. [2023-08-04 08:33:00,226 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 23 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-04 08:33:00,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 31 transitions, 169 flow [2023-08-04 08:33:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:00,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 510 transitions. [2023-08-04 08:33:00,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2023-08-04 08:33:00,227 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 510 transitions. [2023-08-04 08:33:00,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 510 transitions. [2023-08-04 08:33:00,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:00,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 510 transitions. [2023-08-04 08:33:00,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,229 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,230 INFO L175 Difference]: Start difference. First operand has 46 places, 28 transitions, 116 flow. Second operand 4 states and 510 transitions. [2023-08-04 08:33:00,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 31 transitions, 169 flow [2023-08-04 08:33:00,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 31 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:33:00,231 INFO L231 Difference]: Finished difference. Result has 48 places, 27 transitions, 111 flow [2023-08-04 08:33:00,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=4, PETRI_FLOW=111, PETRI_PLACES=48, PETRI_TRANSITIONS=27} [2023-08-04 08:33:00,232 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-04 08:33:00,232 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 27 transitions, 111 flow [2023-08-04 08:33:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:00,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:00,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:00,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-04 08:33:00,438 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:00,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:00,438 INFO L85 PathProgramCache]: Analyzing trace with hash 315362003, now seen corresponding path program 1 times [2023-08-04 08:33:00,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:00,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791170551] [2023-08-04 08:33:00,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:00,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:33:00,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791170551] [2023-08-04 08:33:00,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791170551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:00,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684106522] [2023-08-04 08:33:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:00,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:00,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:00,473 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:00,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-04 08:33:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:00,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:33:00,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:00,581 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 08:33:00,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:33:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684106522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:00,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:33:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 08:33:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530940455] [2023-08-04 08:33:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 08:33:00,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 225 [2023-08-04 08:33:00,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 27 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:00,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 225 [2023-08-04 08:33:00,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:00,715 INFO L124 PetriNetUnfolderBase]: 844/1371 cut-off events. [2023-08-04 08:33:00,715 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-04 08:33:00,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2982 conditions, 1371 events. 844/1371 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5892 event pairs, 176 based on Foata normal form. 16/1383 useless extension candidates. Maximal degree in co-relation 1655. Up to 1100 conditions per place. [2023-08-04 08:33:00,719 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 29 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2023-08-04 08:33:00,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 37 transitions, 197 flow [2023-08-04 08:33:00,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 08:33:00,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 08:33:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 638 transitions. [2023-08-04 08:33:00,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5671111111111111 [2023-08-04 08:33:00,721 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 638 transitions. [2023-08-04 08:33:00,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 638 transitions. [2023-08-04 08:33:00,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:00,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 638 transitions. [2023-08-04 08:33:00,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 225.0) internal successors, (1350), 6 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,723 INFO L175 Difference]: Start difference. First operand has 48 places, 27 transitions, 111 flow. Second operand 5 states and 638 transitions. [2023-08-04 08:33:00,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 37 transitions, 197 flow [2023-08-04 08:33:00,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 37 transitions, 190 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:33:00,724 INFO L231 Difference]: Finished difference. Result has 49 places, 27 transitions, 121 flow [2023-08-04 08:33:00,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=27} [2023-08-04 08:33:00,724 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 10 predicate places. [2023-08-04 08:33:00,725 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 27 transitions, 121 flow [2023-08-04 08:33:00,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:00,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:00,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:00,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-04 08:33:00,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:00,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:00,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:00,930 INFO L85 PathProgramCache]: Analyzing trace with hash 972291509, now seen corresponding path program 1 times [2023-08-04 08:33:00,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:00,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591984056] [2023-08-04 08:33:00,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:00,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:33:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591984056] [2023-08-04 08:33:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591984056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:33:00,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109271446] [2023-08-04 08:33:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:00,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:33:00,957 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 08:33:00,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-04 08:33:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:01,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:33:01,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:33:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:33:01,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:33:01,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 08:33:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109271446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:33:01,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:33:01,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:33:01,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767654014] [2023-08-04 08:33:01,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:33:01,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:33:01,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:33:01,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:33:01,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 225 [2023-08-04 08:33:01,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 27 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 225 [2023-08-04 08:33:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:01,190 INFO L124 PetriNetUnfolderBase]: 632/1015 cut-off events. [2023-08-04 08:33:01,190 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:33:01,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 1015 events. 632/1015 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3882 event pairs, 344 based on Foata normal form. 8/1019 useless extension candidates. Maximal degree in co-relation 1257. Up to 809 conditions per place. [2023-08-04 08:33:01,193 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 27 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-08-04 08:33:01,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 34 transitions, 191 flow [2023-08-04 08:33:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2023-08-04 08:33:01,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5711111111111111 [2023-08-04 08:33:01,195 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2023-08-04 08:33:01,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2023-08-04 08:33:01,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:01,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2023-08-04 08:33:01,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,197 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,197 INFO L175 Difference]: Start difference. First operand has 49 places, 27 transitions, 121 flow. Second operand 4 states and 514 transitions. [2023-08-04 08:33:01,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 34 transitions, 191 flow [2023-08-04 08:33:01,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 34 transitions, 186 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 08:33:01,198 INFO L231 Difference]: Finished difference. Result has 50 places, 26 transitions, 114 flow [2023-08-04 08:33:01,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=50, PETRI_TRANSITIONS=26} [2023-08-04 08:33:01,198 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 11 predicate places. [2023-08-04 08:33:01,198 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 26 transitions, 114 flow [2023-08-04 08:33:01,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:33:01,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:01,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-04 08:33:01,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:33:01,404 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 08:33:01,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:33:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -608413360, now seen corresponding path program 1 times [2023-08-04 08:33:01,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:33:01,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211987006] [2023-08-04 08:33:01,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:33:01,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:33:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:33:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:33:01,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:33:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211987006] [2023-08-04 08:33:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211987006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:33:01,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:33:01,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:33:01,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649818378] [2023-08-04 08:33:01,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:33:01,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:33:01,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:33:01,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:33:01,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:33:01,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 225 [2023-08-04 08:33:01,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 26 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:33:01,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 225 [2023-08-04 08:33:01,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:33:01,555 INFO L124 PetriNetUnfolderBase]: 440/727 cut-off events. [2023-08-04 08:33:01,555 INFO L125 PetriNetUnfolderBase]: For 254/254 co-relation queries the response was YES. [2023-08-04 08:33:01,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1720 conditions, 727 events. 440/727 cut-off events. For 254/254 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2565 event pairs, 104 based on Foata normal form. 64/787 useless extension candidates. Maximal degree in co-relation 1131. Up to 336 conditions per place. [2023-08-04 08:33:01,556 INFO L140 encePairwiseOnDemand]: 223/225 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2023-08-04 08:33:01,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 34 transitions, 190 flow [2023-08-04 08:33:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:33:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:33:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 08:33:01,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2023-08-04 08:33:01,557 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 08:33:01,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 08:33:01,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:33:01,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 08:33:01,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,560 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,560 INFO L175 Difference]: Start difference. First operand has 50 places, 26 transitions, 114 flow. Second operand 4 states and 518 transitions. [2023-08-04 08:33:01,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 34 transitions, 190 flow [2023-08-04 08:33:01,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 34 transitions, 183 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:33:01,561 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-08-04 08:33:01,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-08-04 08:33:01,562 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 9 predicate places. [2023-08-04 08:33:01,562 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-08-04 08:33:01,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.75) internal successors, (503), 4 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:33:01,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 08:33:01,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 08:33:01,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 08:33:01,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-04 08:33:01,563 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:33:01,563 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (2/2) [2023-08-04 08:33:01,563 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:33:01,563 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:33:01,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:33:01 BasicIcfg [2023-08-04 08:33:01,569 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:33:01,570 INFO L158 Benchmark]: Toolchain (without parser) took 93583.05ms. Allocated memory was 620.8MB in the beginning and 10.8GB in the end (delta: 10.2GB). Free memory was 571.2MB in the beginning and 8.0GB in the end (delta: -7.4GB). Peak memory consumption was 2.8GB. Max. memory is 16.0GB. [2023-08-04 08:33:01,570 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 367.0MB. Free memory is still 317.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:33:01,570 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.39ms. Allocated memory is still 620.8MB. Free memory was 571.2MB in the beginning and 559.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-04 08:33:01,571 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.64ms. Allocated memory is still 620.8MB. Free memory was 559.7MB in the beginning and 557.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:33:01,571 INFO L158 Benchmark]: Boogie Preprocessor took 18.91ms. Allocated memory is still 620.8MB. Free memory was 557.8MB in the beginning and 556.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:33:01,571 INFO L158 Benchmark]: RCFGBuilder took 368.38ms. Allocated memory is still 620.8MB. Free memory was 556.5MB in the beginning and 541.2MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 08:33:01,572 INFO L158 Benchmark]: TraceAbstraction took 92989.50ms. Allocated memory was 620.8MB in the beginning and 10.8GB in the end (delta: 10.2GB). Free memory was 540.7MB in the beginning and 8.0GB in the end (delta: -7.4GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-08-04 08:33:01,573 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 367.0MB. Free memory is still 317.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 177.39ms. Allocated memory is still 620.8MB. Free memory was 571.2MB in the beginning and 559.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.64ms. Allocated memory is still 620.8MB. Free memory was 559.7MB in the beginning and 557.8MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.91ms. Allocated memory is still 620.8MB. Free memory was 557.8MB in the beginning and 556.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 368.38ms. Allocated memory is still 620.8MB. Free memory was 556.5MB in the beginning and 541.2MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 92989.50ms. Allocated memory was 620.8MB in the beginning and 10.8GB in the end (delta: 10.2GB). Free memory was 540.7MB in the beginning and 8.0GB in the end (delta: -7.4GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 115 PlacesBefore, 36 PlacesAfterwards, 125 TransitionsBefore, 39 TransitionsAfterwards, 1332 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 7 ChoiceCompositions, 101 TotalNumberOfCompositions, 4066 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2988, independent: 2925, independent conditional: 0, independent unconditional: 2925, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 771, independent: 759, independent conditional: 0, independent unconditional: 759, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2988, independent: 2166, independent conditional: 0, independent unconditional: 2166, dependent: 51, dependent conditional: 0, dependent unconditional: 51, unknown: 771, unknown conditional: 0, unknown unconditional: 771] , Statistics on independence cache: Total cache size (in pairs): 75, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 81 PlacesBefore, 24 PlacesAfterwards, 76 TransitionsBefore, 17 TransitionsAfterwards, 486 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 63 TotalNumberOfCompositions, 351 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 351, independent: 351, independent conditional: 0, independent unconditional: 351, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 235, independent: 235, independent conditional: 0, independent unconditional: 235, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 351, independent: 116, independent conditional: 0, independent unconditional: 116, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 235, unknown conditional: 0, unknown unconditional: 235] , Statistics on independence cache: Total cache size (in pairs): 3, Positive cache size: 3, Positive conditional cache size: 0, Positive unconditional cache size: 3, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 133 PlacesBefore, 51 PlacesAfterwards, 146 TransitionsBefore, 57 TransitionsAfterwards, 3204 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 50 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 20 ConcurrentYvCompositions, 7 ChoiceCompositions, 104 TotalNumberOfCompositions, 11972 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8840, independent: 8727, independent conditional: 0, independent unconditional: 8727, dependent: 113, dependent conditional: 0, dependent unconditional: 113, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1835, independent: 1812, independent conditional: 0, independent unconditional: 1812, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8840, independent: 6915, independent conditional: 0, independent unconditional: 6915, dependent: 90, dependent conditional: 0, dependent unconditional: 90, unknown: 1835, unknown conditional: 0, unknown unconditional: 1835] , Statistics on independence cache: Total cache size (in pairs): 198, Positive cache size: 191, Positive conditional cache size: 0, Positive unconditional cache size: 191, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 99 PlacesBefore, 39 PlacesAfterwards, 88 TransitionsBefore, 26 TransitionsAfterwards, 1188 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 66 TotalNumberOfCompositions, 1351 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1187, independent: 1178, independent conditional: 0, independent unconditional: 1178, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 623, independent: 618, independent conditional: 0, independent unconditional: 618, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1187, independent: 560, independent conditional: 0, independent unconditional: 560, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 623, unknown conditional: 0, unknown unconditional: 623] , Statistics on independence cache: Total cache size (in pairs): 30, Positive cache size: 30, Positive conditional cache size: 0, Positive unconditional cache size: 30, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 77]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 134 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.9s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 143 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 23 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 501 IncrementalHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 23 mSDtfsCounter, 501 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=5, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 254 NumberOfCodeBlocks, 254 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 358 SizeOfPredicates, 0 NumberOfNonLiveVariables, 819 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 40/48 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 146 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 80.7s, OverallIterations: 18, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 49.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3665 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3412 mSDsluCounter, 4961 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4907 mSDsCounter, 217 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9723 IncrementalHoareTripleChecker+Invalid, 9940 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 217 mSolverCounterUnsat, 54 mSDtfsCounter, 9723 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1569 GetRequests, 1365 SyntacticMatches, 20 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=915occurred in iteration=16, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 23.4s InterpolantComputationTime, 1504 NumberOfCodeBlocks, 1504 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2102 ConstructedInterpolants, 0 QuantifiedInterpolants, 41270 SizeOfPredicates, 54 NumberOfNonLiveVariables, 3462 ConjunctsInSsa, 124 ConjunctsInUnsatCore, 47 InterpolantComputations, 6 PerfectInterpolantSequences, 846/948 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 134 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.8s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 37 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 146 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.5s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 219 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 155 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 455 IncrementalHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 8 mSDtfsCounter, 455 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 624 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 124/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 08:33:01,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...