/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_parallel-bakery-2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:41:22,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:41:22,574 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:41:22,578 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:41:22,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:41:22,578 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:41:22,579 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:41:22,596 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:41:22,596 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:41:22,597 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:41:22,597 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:41:22,597 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:41:22,598 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:41:22,598 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:41:22,599 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:41:22,599 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:41:22,599 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:41:22,600 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:41:22,600 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:41:22,600 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:41:22,600 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:41:22,601 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:41:22,601 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:41:22,602 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:41:22,602 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:41:22,602 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:41:22,603 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:41:22,603 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:41:22,603 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:41:22,603 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:41:22,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:41:22,604 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:41:22,604 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:41:22,605 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:41:22,605 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:41:22,605 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:41:22,606 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:41:22,606 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:41:22,606 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:41:22,606 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:41:22,607 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:41:22,607 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:41:22,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:41:22,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:41:22,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:41:22,854 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:41:22,856 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:41:22,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-bakery-2.wvr_bound2.c [2023-08-04 08:41:24,058 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:41:24,228 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:41:24,228 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-bakery-2.wvr_bound2.c [2023-08-04 08:41:24,235 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/001ee6f66/40a164aa267c4e179b934a4611e53be9/FLAG735f44ac1 [2023-08-04 08:41:24,248 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/001ee6f66/40a164aa267c4e179b934a4611e53be9 [2023-08-04 08:41:24,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:41:24,251 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:41:24,252 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:41:24,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:41:24,255 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:41:24,256 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad348e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24, skipping insertion in model container [2023-08-04 08:41:24,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,279 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:41:24,446 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_parallel-bakery-2.wvr_bound2.c[3674,3687] [2023-08-04 08:41:24,448 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:41:24,454 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:41:24,475 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_parallel-bakery-2.wvr_bound2.c[3674,3687] [2023-08-04 08:41:24,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:41:24,482 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:41:24,482 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:41:24,488 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:41:24,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24 WrapperNode [2023-08-04 08:41:24,489 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:41:24,490 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:41:24,490 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:41:24,490 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:41:24,495 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,501 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,520 INFO L138 Inliner]: procedures = 21, calls = 60, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 187 [2023-08-04 08:41:24,521 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:41:24,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:41:24,522 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:41:24,522 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:41:24,529 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,529 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,542 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,543 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,544 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,546 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:41:24,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:41:24,547 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:41:24,547 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:41:24,548 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (1/1) ... [2023-08-04 08:41:24,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:41:24,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:24,586 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 08:41:24,592 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 08:41:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:41:24,616 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:41:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:41:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:41:24,617 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:41:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:41:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:41:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:41:24,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:41:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:41:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:41:24,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:41:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:41:24,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:41:24,619 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 08:41:24,710 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:41:24,718 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:41:24,950 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:41:25,013 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:41:25,013 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 08:41:25,015 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:41:25 BoogieIcfgContainer [2023-08-04 08:41:25,016 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:41:25,018 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:41:25,018 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:41:25,020 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:41:25,021 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:41:24" (1/3) ... [2023-08-04 08:41:25,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e7799e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:41:25, skipping insertion in model container [2023-08-04 08:41:25,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:41:24" (2/3) ... [2023-08-04 08:41:25,022 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63e7799e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:41:25, skipping insertion in model container [2023-08-04 08:41:25,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:41:25" (3/3) ... [2023-08-04 08:41:25,023 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-bakery-2.wvr_bound2.c [2023-08-04 08:41:25,029 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:41:25,035 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:41:25,035 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:41:25,036 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:41:25,088 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:41:25,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 138 transitions, 298 flow [2023-08-04 08:41:25,245 INFO L124 PetriNetUnfolderBase]: 27/279 cut-off events. [2023-08-04 08:41:25,245 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 08:41:25,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 279 events. 27/279 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 954 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-08-04 08:41:25,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 138 transitions, 298 flow [2023-08-04 08:41:25,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 128 transitions, 274 flow [2023-08-04 08:41:25,268 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:41:25,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 128 transitions, 274 flow [2023-08-04 08:41:25,276 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 128 transitions, 274 flow [2023-08-04 08:41:25,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 128 transitions, 274 flow [2023-08-04 08:41:25,323 INFO L124 PetriNetUnfolderBase]: 27/244 cut-off events. [2023-08-04 08:41:25,324 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:41:25,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 244 events. 27/244 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 713 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 144. Up to 8 conditions per place. [2023-08-04 08:41:25,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 2244 [2023-08-04 08:41:27,837 INFO L134 LiptonReduction]: Checked pairs total: 11024 [2023-08-04 08:41:27,838 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 08:41:27,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:41:27,857 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;@4798219c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:41:27,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:41:27,864 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:41:27,864 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 08:41:27,864 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:41:27,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:27,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:41:27,866 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:27,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 517601712, now seen corresponding path program 1 times [2023-08-04 08:41:27,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:27,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191978838] [2023-08-04 08:41:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:27,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:28,088 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 08:41:28,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:28,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191978838] [2023-08-04 08:41:28,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191978838] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:28,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:41:28,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:41:28,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475010358] [2023-08-04 08:41:28,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:28,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:28,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:28,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:28,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:41:28,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 08:41:28,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 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 08:41:28,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:28,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 08:41:28,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:28,320 INFO L124 PetriNetUnfolderBase]: 390/877 cut-off events. [2023-08-04 08:41:28,320 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-04 08:41:28,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1611 conditions, 877 events. 390/877 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5387 event pairs, 368 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 1417. Up to 688 conditions per place. [2023-08-04 08:41:28,328 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 29 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 08:41:28,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 170 flow [2023-08-04 08:41:28,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:28,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-04 08:41:28,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5316455696202531 [2023-08-04 08:41:28,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-04 08:41:28,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-04 08:41:28,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:28,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-04 08:41:28,350 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 08:41:28,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:28,355 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:28,357 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 3 states and 378 transitions. [2023-08-04 08:41:28,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 170 flow [2023-08-04 08:41:28,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 44 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:41:28,364 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 98 flow [2023-08-04 08:41:28,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-04 08:41:28,368 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-08-04 08:41:28,369 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 98 flow [2023-08-04 08:41:28,369 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 08:41:28,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:28,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:28,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:41:28,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:28,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:28,370 INFO L85 PathProgramCache]: Analyzing trace with hash 427953149, now seen corresponding path program 1 times [2023-08-04 08:41:28,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:28,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014518490] [2023-08-04 08:41:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:28,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:28,442 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 08:41:28,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:28,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014518490] [2023-08-04 08:41:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014518490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800416455] [2023-08-04 08:41:28,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:28,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:28,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:28,449 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 08:41:28,459 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 08:41:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:28,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:28,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:28,563 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 08:41:28,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:28,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800416455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:28,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:28,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:28,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613054642] [2023-08-04 08:41:28,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:28,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:28,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 08:41:28,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 98 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 08:41:28,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:28,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 08:41:28,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:28,714 INFO L124 PetriNetUnfolderBase]: 385/824 cut-off events. [2023-08-04 08:41:28,714 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 08:41:28,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 824 events. 385/824 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4812 event pairs, 325 based on Foata normal form. 0/692 useless extension candidates. Maximal degree in co-relation 946. Up to 627 conditions per place. [2023-08-04 08:41:28,719 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 33 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-04 08:41:28,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 48 transitions, 188 flow [2023-08-04 08:41:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-04 08:41:28,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372714486638537 [2023-08-04 08:41:28,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-04 08:41:28,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-04 08:41:28,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:28,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-04 08:41:28,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 08:41:28,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:28,727 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:28,727 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 98 flow. Second operand 3 states and 382 transitions. [2023-08-04 08:41:28,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 48 transitions, 188 flow [2023-08-04 08:41:28,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:41:28,729 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 102 flow [2023-08-04 08:41:28,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-04 08:41:28,730 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2023-08-04 08:41:28,730 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 102 flow [2023-08-04 08:41:28,730 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 08:41:28,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:28,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:28,739 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 08:41:28,935 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 08:41:28,936 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:28,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:28,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2021723487, now seen corresponding path program 1 times [2023-08-04 08:41:28,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:28,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517065126] [2023-08-04 08:41:28,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:28,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:29,050 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 08:41:29,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517065126] [2023-08-04 08:41:29,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517065126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:29,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767455917] [2023-08-04 08:41:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:29,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:29,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:29,053 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 08:41:29,085 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 08:41:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:29,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:29,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:29,130 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 08:41:29,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:29,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767455917] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:29,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:29,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:29,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095115680] [2023-08-04 08:41:29,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:29,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:29,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:29,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 08:41:29,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 102 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 08:41:29,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:29,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 08:41:29,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:29,235 INFO L124 PetriNetUnfolderBase]: 247/580 cut-off events. [2023-08-04 08:41:29,235 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-04 08:41:29,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1163 conditions, 580 events. 247/580 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3090 event pairs, 172 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 681. Up to 319 conditions per place. [2023-08-04 08:41:29,239 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 37 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 08:41:29,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 51 transitions, 208 flow [2023-08-04 08:41:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:29,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-04 08:41:29,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414908579465542 [2023-08-04 08:41:29,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-04 08:41:29,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-04 08:41:29,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:29,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-04 08:41:29,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states 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 08:41:29,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:29,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:29,246 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 102 flow. Second operand 3 states and 385 transitions. [2023-08-04 08:41:29,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 51 transitions, 208 flow [2023-08-04 08:41:29,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:41:29,249 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 110 flow [2023-08-04 08:41:29,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=110, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-08-04 08:41:29,250 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 3 predicate places. [2023-08-04 08:41:29,251 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 110 flow [2023-08-04 08:41:29,251 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 08:41:29,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:29,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:29,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:29,456 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 08:41:29,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:29,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:29,457 INFO L85 PathProgramCache]: Analyzing trace with hash -322491045, now seen corresponding path program 1 times [2023-08-04 08:41:29,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:29,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213790671] [2023-08-04 08:41:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:29,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:29,584 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 08:41:29,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:29,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213790671] [2023-08-04 08:41:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213790671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:29,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691366989] [2023-08-04 08:41:29,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:29,589 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 08:41:29,616 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 08:41:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:29,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:29,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:29,668 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 08:41:29,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:29,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691366989] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:29,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:29,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:41:29,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966910955] [2023-08-04 08:41:29,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:29,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:29,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:29,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:29,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:29,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 237 [2023-08-04 08:41:29,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:29,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:29,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 237 [2023-08-04 08:41:29,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:29,784 INFO L124 PetriNetUnfolderBase]: 238/551 cut-off events. [2023-08-04 08:41:29,784 INFO L125 PetriNetUnfolderBase]: For 126/126 co-relation queries the response was YES. [2023-08-04 08:41:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1145 conditions, 551 events. 238/551 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2922 event pairs, 221 based on Foata normal form. 0/521 useless extension candidates. Maximal degree in co-relation 673. Up to 410 conditions per place. [2023-08-04 08:41:29,788 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 33 selfloop transitions, 2 changer transitions 2/49 dead transitions. [2023-08-04 08:41:29,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 49 transitions, 202 flow [2023-08-04 08:41:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-04 08:41:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372714486638537 [2023-08-04 08:41:29,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-04 08:41:29,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-04 08:41:29,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:29,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-04 08:41:29,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states 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 08:41:29,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:29,799 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 states have internal predecessors, (948), 0 states have call successors, (0), 0 states 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 08:41:29,799 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 110 flow. Second operand 3 states and 382 transitions. [2023-08-04 08:41:29,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 49 transitions, 202 flow [2023-08-04 08:41:29,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 49 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:29,803 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 112 flow [2023-08-04 08:41:29,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=42, 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=112, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-04 08:41:29,804 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2023-08-04 08:41:29,804 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 112 flow [2023-08-04 08:41:29,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:29,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:29,805 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, 1, 1] [2023-08-04 08:41:29,815 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 08:41:30,010 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 08:41:30,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:30,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:30,011 INFO L85 PathProgramCache]: Analyzing trace with hash 889089058, now seen corresponding path program 1 times [2023-08-04 08:41:30,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:30,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816789549] [2023-08-04 08:41:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:30,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:30,072 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 08:41:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816789549] [2023-08-04 08:41:30,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816789549] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:30,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367523039] [2023-08-04 08:41:30,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:30,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:30,081 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 08:41:30,084 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 08:41:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:30,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:41:30,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:30,197 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 08:41:30,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:30,229 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 08:41:30,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367523039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:30,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:30,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:41:30,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941872828] [2023-08-04 08:41:30,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:30,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:30,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:30,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:30,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:30,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 08:41:30,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 08:41:30,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:30,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 08:41:30,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:30,259 INFO L124 PetriNetUnfolderBase]: 8/30 cut-off events. [2023-08-04 08:41:30,259 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:41:30,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 30 events. 8/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 5/34 useless extension candidates. Maximal degree in co-relation 61. Up to 18 conditions per place. [2023-08-04 08:41:30,260 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 0 selfloop transitions, 0 changer transitions 18/18 dead transitions. [2023-08-04 08:41:30,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 66 flow [2023-08-04 08:41:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:41:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:41:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 470 transitions. [2023-08-04 08:41:30,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957805907172996 [2023-08-04 08:41:30,263 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 470 transitions. [2023-08-04 08:41:30,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 470 transitions. [2023-08-04 08:41:30,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:30,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 470 transitions. [2023-08-04 08:41:30,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:30,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 08:41:30,267 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states 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 08:41:30,267 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 112 flow. Second operand 4 states and 470 transitions. [2023-08-04 08:41:30,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 66 flow [2023-08-04 08:41:30,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:30,268 INFO L231 Difference]: Finished difference. Result has 23 places, 0 transitions, 0 flow [2023-08-04 08:41:30,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=23, PETRI_TRANSITIONS=0} [2023-08-04 08:41:30,270 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -17 predicate places. [2023-08-04 08:41:30,270 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 0 transitions, 0 flow [2023-08-04 08:41:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 08:41:30,273 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:41:30,283 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 08:41:30,479 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 08:41:30,479 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 08:41:30,481 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:41:30,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 138 transitions, 298 flow [2023-08-04 08:41:30,507 INFO L124 PetriNetUnfolderBase]: 27/279 cut-off events. [2023-08-04 08:41:30,507 INFO L125 PetriNetUnfolderBase]: For 8/12 co-relation queries the response was YES. [2023-08-04 08:41:30,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 279 events. 27/279 cut-off events. For 8/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 954 event pairs, 0 based on Foata normal form. 0/242 useless extension candidates. Maximal degree in co-relation 162. Up to 8 conditions per place. [2023-08-04 08:41:30,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 138 transitions, 298 flow [2023-08-04 08:41:30,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 98 transitions, 206 flow [2023-08-04 08:41:30,508 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:41:30,509 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 98 transitions, 206 flow [2023-08-04 08:41:30,509 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 98 transitions, 206 flow [2023-08-04 08:41:30,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 98 transitions, 206 flow [2023-08-04 08:41:30,518 INFO L124 PetriNetUnfolderBase]: 3/135 cut-off events. [2023-08-04 08:41:30,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:41:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 135 events. 3/135 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 196 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 94. Up to 4 conditions per place. [2023-08-04 08:41:30,519 INFO L119 LiptonReduction]: Number of co-enabled transitions 990 [2023-08-04 08:41:32,617 INFO L134 LiptonReduction]: Checked pairs total: 4969 [2023-08-04 08:41:32,617 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-04 08:41:32,618 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:41:32,619 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;@4798219c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:41:32,619 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:41:32,621 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:41:32,621 INFO L124 PetriNetUnfolderBase]: 0/13 cut-off events. [2023-08-04 08:41:32,621 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:41:32,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:32,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:41:32,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:41:32,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash 592211700, now seen corresponding path program 1 times [2023-08-04 08:41:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:32,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391202833] [2023-08-04 08:41:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:32,646 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 08:41:32,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:32,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391202833] [2023-08-04 08:41:32,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391202833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:32,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:41:32,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:41:32,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500559774] [2023-08-04 08:41:32,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:32,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:32,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:41:32,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 215 [2023-08-04 08:41:32,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 08:41:32,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:32,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 215 [2023-08-04 08:41:32,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:32,719 INFO L124 PetriNetUnfolderBase]: 72/209 cut-off events. [2023-08-04 08:41:32,719 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 08:41:32,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 209 events. 72/209 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 929 event pairs, 68 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 363. Up to 138 conditions per place. [2023-08-04 08:41:32,723 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 18 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 08:41:32,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 114 flow [2023-08-04 08:41:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-04 08:41:32,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674418604651162 [2023-08-04 08:41:32,725 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-04 08:41:32,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-04 08:41:32,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:32,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-04 08:41:32,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 08:41:32,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states 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 08:41:32,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states 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 08:41:32,728 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 64 flow. Second operand 3 states and 366 transitions. [2023-08-04 08:41:32,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 114 flow [2023-08-04 08:41:32,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:41:32,729 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 72 flow [2023-08-04 08:41:32,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-04 08:41:32,730 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-04 08:41:32,730 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 72 flow [2023-08-04 08:41:32,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states 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 08:41:32,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:32,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:41:32,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 08:41:32,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:41:32,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:32,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1173092627, now seen corresponding path program 1 times [2023-08-04 08:41:32,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:32,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44928930] [2023-08-04 08:41:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:41:32,747 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:41:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:41:32,768 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:41:32,768 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:41:32,768 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:41:32,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:41:32,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:41:32,769 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 08:41:32,769 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:41:32,770 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:41:32,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:41:32,788 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:41:32,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 166 transitions, 380 flow [2023-08-04 08:41:32,864 INFO L124 PetriNetUnfolderBase]: 118/859 cut-off events. [2023-08-04 08:41:32,864 INFO L125 PetriNetUnfolderBase]: For 72/85 co-relation queries the response was YES. [2023-08-04 08:41:32,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 859 events. 118/859 cut-off events. For 72/85 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4613 event pairs, 1 based on Foata normal form. 0/738 useless extension candidates. Maximal degree in co-relation 509. Up to 32 conditions per place. [2023-08-04 08:41:32,868 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 166 transitions, 380 flow [2023-08-04 08:41:32,870 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 156 transitions, 352 flow [2023-08-04 08:41:32,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:41:32,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 156 transitions, 352 flow [2023-08-04 08:41:32,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 156 transitions, 352 flow [2023-08-04 08:41:32,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 156 transitions, 352 flow [2023-08-04 08:41:32,929 INFO L124 PetriNetUnfolderBase]: 118/727 cut-off events. [2023-08-04 08:41:32,929 INFO L125 PetriNetUnfolderBase]: For 68/75 co-relation queries the response was YES. [2023-08-04 08:41:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 727 events. 118/727 cut-off events. For 68/75 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3599 event pairs, 1 based on Foata normal form. 0/622 useless extension candidates. Maximal degree in co-relation 442. Up to 32 conditions per place. [2023-08-04 08:41:32,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 5896 [2023-08-04 08:41:35,517 INFO L134 LiptonReduction]: Checked pairs total: 44620 [2023-08-04 08:41:35,517 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 08:41:35,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:41:35,519 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;@4798219c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:41:35,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:41:35,521 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:41:35,521 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 08:41:35,521 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:41:35,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:35,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 08:41:35,521 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:35,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash 870663810, now seen corresponding path program 1 times [2023-08-04 08:41:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444360691] [2023-08-04 08:41:35,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:35,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:35,547 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 08:41:35,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:35,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444360691] [2023-08-04 08:41:35,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444360691] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:35,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:41:35,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:41:35,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494764716] [2023-08-04 08:41:35,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:35,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:35,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:35,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:41:35,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 267 [2023-08-04 08:41:35,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 08:41:35,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:35,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 267 [2023-08-04 08:41:35,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:39,659 INFO L124 PetriNetUnfolderBase]: 28950/47225 cut-off events. [2023-08-04 08:41:39,659 INFO L125 PetriNetUnfolderBase]: For 3361/3361 co-relation queries the response was YES. [2023-08-04 08:41:39,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89110 conditions, 47225 events. 28950/47225 cut-off events. For 3361/3361 co-relation queries the response was YES. Maximal size of possible extension queue 1681. Compared 410879 event pairs, 27614 based on Foata normal form. 0/42570 useless extension candidates. Maximal degree in co-relation 47093. Up to 39618 conditions per place. [2023-08-04 08:41:39,981 INFO L140 encePairwiseOnDemand]: 264/267 looper letters, 45 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 08:41:39,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 71 transitions, 276 flow [2023-08-04 08:41:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-04 08:41:39,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2023-08-04 08:41:39,983 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-04 08:41:39,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-04 08:41:39,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:39,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-04 08:41:39,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 0 states have call successors, (0), 0 states 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 08:41:39,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:39,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:39,986 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 170 flow. Second operand 3 states and 441 transitions. [2023-08-04 08:41:39,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 71 transitions, 276 flow [2023-08-04 08:41:40,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:41:40,158 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 176 flow [2023-08-04 08:41:40,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-08-04 08:41:40,159 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-04 08:41:40,159 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 176 flow [2023-08-04 08:41:40,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states 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 08:41:40,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:40,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:40,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 08:41:40,160 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:40,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:40,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1313901535, now seen corresponding path program 1 times [2023-08-04 08:41:40,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:40,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644513773] [2023-08-04 08:41:40,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:40,201 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 08:41:40,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644513773] [2023-08-04 08:41:40,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644513773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:40,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184441984] [2023-08-04 08:41:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:40,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:40,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:40,203 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 08:41:40,219 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 08:41:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:40,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:40,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:40,274 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 08:41:40,274 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:40,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184441984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:40,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:40,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:40,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710930262] [2023-08-04 08:41:40,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:40,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:40,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:40,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:40,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 267 [2023-08-04 08:41:40,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:40,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:40,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 267 [2023-08-04 08:41:40,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:43,081 INFO L124 PetriNetUnfolderBase]: 28920/46144 cut-off events. [2023-08-04 08:41:43,081 INFO L125 PetriNetUnfolderBase]: For 2207/2207 co-relation queries the response was YES. [2023-08-04 08:41:43,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87912 conditions, 46144 events. 28920/46144 cut-off events. For 2207/2207 co-relation queries the response was YES. Maximal size of possible extension queue 1662. Compared 391616 event pairs, 27196 based on Foata normal form. 0/41729 useless extension candidates. Maximal degree in co-relation 55667. Up to 39077 conditions per place. [2023-08-04 08:41:43,344 INFO L140 encePairwiseOnDemand]: 264/267 looper letters, 54 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 08:41:43,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 316 flow [2023-08-04 08:41:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:43,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-04 08:41:43,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5605493133583022 [2023-08-04 08:41:43,347 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-04 08:41:43,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-04 08:41:43,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:43,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-04 08:41:43,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states 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 08:41:43,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:43,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:43,350 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 176 flow. Second operand 3 states and 449 transitions. [2023-08-04 08:41:43,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 316 flow [2023-08-04 08:41:43,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:43,354 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 186 flow [2023-08-04 08:41:43,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2023-08-04 08:41:43,356 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-04 08:41:43,356 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 186 flow [2023-08-04 08:41:43,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:41:43,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:43,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:43,361 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 08:41:43,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:43,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:43,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash -596999623, now seen corresponding path program 1 times [2023-08-04 08:41:43,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:43,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896337334] [2023-08-04 08:41:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:43,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:43,598 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 08:41:43,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896337334] [2023-08-04 08:41:43,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896337334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:43,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550804752] [2023-08-04 08:41:43,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:43,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:43,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:43,601 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 08:41:43,625 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 08:41:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:43,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:43,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:43,676 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 08:41:43,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:43,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550804752] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:43,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:43,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:41:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744857460] [2023-08-04 08:41:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:43,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 267 [2023-08-04 08:41:43,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 08:41:43,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:43,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 267 [2023-08-04 08:41:43,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:45,828 INFO L124 PetriNetUnfolderBase]: 22593/35118 cut-off events. [2023-08-04 08:41:45,828 INFO L125 PetriNetUnfolderBase]: For 2755/2755 co-relation queries the response was YES. [2023-08-04 08:41:45,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70505 conditions, 35118 events. 22593/35118 cut-off events. For 2755/2755 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 278471 event pairs, 15188 based on Foata normal form. 0/32788 useless extension candidates. Maximal degree in co-relation 31126. Up to 22430 conditions per place. [2023-08-04 08:41:46,011 INFO L140 encePairwiseOnDemand]: 264/267 looper letters, 63 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2023-08-04 08:41:46,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 370 flow [2023-08-04 08:41:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 08:41:46,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705368289637952 [2023-08-04 08:41:46,015 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 08:41:46,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 08:41:46,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:46,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 08:41:46,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 08:41:46,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:46,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:46,021 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 186 flow. Second operand 3 states and 457 transitions. [2023-08-04 08:41:46,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 370 flow [2023-08-04 08:41:46,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:46,026 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 196 flow [2023-08-04 08:41:46,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-08-04 08:41:46,027 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-08-04 08:41:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 196 flow [2023-08-04 08:41:46,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states 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 08:41:46,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:46,028 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] [2023-08-04 08:41:46,035 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 08:41:46,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:46,233 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:46,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash -730231109, now seen corresponding path program 1 times [2023-08-04 08:41:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253766124] [2023-08-04 08:41:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:46,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:46,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:46,298 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 08:41:46,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:46,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253766124] [2023-08-04 08:41:46,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253766124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:46,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114868982] [2023-08-04 08:41:46,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:46,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:46,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:46,300 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 08:41:46,327 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 08:41:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:46,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:41:46,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:46,385 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 08:41:46,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:41:46,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114868982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:41:46,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:41:46,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:41:46,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218852651] [2023-08-04 08:41:46,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:41:46,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:41:46,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:46,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:41:46,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:46,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 267 [2023-08-04 08:41:46,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 08:41:46,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:46,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 267 [2023-08-04 08:41:46,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:48,469 INFO L124 PetriNetUnfolderBase]: 21814/35153 cut-off events. [2023-08-04 08:41:48,470 INFO L125 PetriNetUnfolderBase]: For 7309/7309 co-relation queries the response was YES. [2023-08-04 08:41:48,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72551 conditions, 35153 events. 21814/35153 cut-off events. For 7309/7309 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 288326 event pairs, 18207 based on Foata normal form. 0/34398 useless extension candidates. Maximal degree in co-relation 31864. Up to 25788 conditions per place. [2023-08-04 08:41:48,650 INFO L140 encePairwiseOnDemand]: 264/267 looper letters, 64 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2023-08-04 08:41:48,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 382 flow [2023-08-04 08:41:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:41:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:41:48,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-04 08:41:48,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5705368289637952 [2023-08-04 08:41:48,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-04 08:41:48,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-04 08:41:48,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:48,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-04 08:41:48,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states 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 08:41:48,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:48,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states 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 08:41:48,655 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 196 flow. Second operand 3 states and 457 transitions. [2023-08-04 08:41:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 382 flow [2023-08-04 08:41:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:48,777 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 206 flow [2023-08-04 08:41:48,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2023-08-04 08:41:48,777 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 7 predicate places. [2023-08-04 08:41:48,777 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 206 flow [2023-08-04 08:41:48,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 08:41:48,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:48,778 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, 1, 1, 1, 1] [2023-08-04 08:41:48,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 08:41:48,982 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 08:41:48,983 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:48,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1151993866, now seen corresponding path program 1 times [2023-08-04 08:41:48,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:48,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399056060] [2023-08-04 08:41:48,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:48,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:49,184 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 08:41:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:49,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399056060] [2023-08-04 08:41:49,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399056060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:49,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521204317] [2023-08-04 08:41:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:49,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:49,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:49,186 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 08:41:49,189 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 08:41:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:49,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:41:49,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:49,279 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 08:41:49,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:49,303 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 08:41:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521204317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:49,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:49,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:41:49,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386158190] [2023-08-04 08:41:49,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:49,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:49,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:49,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:49,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 267 [2023-08-04 08:41:49,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:41:49,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:49,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 267 [2023-08-04 08:41:49,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:51,426 INFO L124 PetriNetUnfolderBase]: 20053/31724 cut-off events. [2023-08-04 08:41:51,426 INFO L125 PetriNetUnfolderBase]: For 5055/5055 co-relation queries the response was YES. [2023-08-04 08:41:51,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66447 conditions, 31724 events. 20053/31724 cut-off events. For 5055/5055 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 251989 event pairs, 9362 based on Foata normal form. 5/31334 useless extension candidates. Maximal degree in co-relation 51428. Up to 27946 conditions per place. [2023-08-04 08:41:51,587 INFO L140 encePairwiseOnDemand]: 263/267 looper letters, 55 selfloop transitions, 3 changer transitions 1/83 dead transitions. [2023-08-04 08:41:51,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 352 flow [2023-08-04 08:41:51,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:41:51,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:41:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-08-04 08:41:51,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402621722846442 [2023-08-04 08:41:51,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-08-04 08:41:51,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-08-04 08:41:51,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:51,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-08-04 08:41:51,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states 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 08:41:51,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:51,595 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:51,595 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 206 flow. Second operand 4 states and 577 transitions. [2023-08-04 08:41:51,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 352 flow [2023-08-04 08:41:51,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 83 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:51,900 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 218 flow [2023-08-04 08:41:51,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2023-08-04 08:41:51,901 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2023-08-04 08:41:51,901 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 218 flow [2023-08-04 08:41:51,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:41:51,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:51,902 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, 1, 1, 1, 1] [2023-08-04 08:41:51,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 08:41:52,105 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 08:41:52,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:52,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash 886349709, now seen corresponding path program 1 times [2023-08-04 08:41:52,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:52,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102236262] [2023-08-04 08:41:52,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:52,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:52,158 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 08:41:52,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:52,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102236262] [2023-08-04 08:41:52,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102236262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:52,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490571308] [2023-08-04 08:41:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:52,160 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 08:41:52,163 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 08:41:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:52,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:41:52,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:52,250 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 08:41:52,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:52,405 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 08:41:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490571308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:52,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:52,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:41:52,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524057164] [2023-08-04 08:41:52,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:52,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:52,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:52,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 267 [2023-08-04 08:41:52,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 08:41:52,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:52,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 267 [2023-08-04 08:41:52,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:54,527 INFO L124 PetriNetUnfolderBase]: 19218/30012 cut-off events. [2023-08-04 08:41:54,527 INFO L125 PetriNetUnfolderBase]: For 4571/4571 co-relation queries the response was YES. [2023-08-04 08:41:54,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63068 conditions, 30012 events. 19218/30012 cut-off events. For 4571/4571 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 231517 event pairs, 10522 based on Foata normal form. 125/29895 useless extension candidates. Maximal degree in co-relation 48219. Up to 20841 conditions per place. [2023-08-04 08:41:54,691 INFO L140 encePairwiseOnDemand]: 263/267 looper letters, 71 selfloop transitions, 3 changer transitions 1/99 dead transitions. [2023-08-04 08:41:54,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 99 transitions, 428 flow [2023-08-04 08:41:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:41:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:41:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 593 transitions. [2023-08-04 08:41:54,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5552434456928839 [2023-08-04 08:41:54,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 593 transitions. [2023-08-04 08:41:54,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 593 transitions. [2023-08-04 08:41:54,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:54,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 593 transitions. [2023-08-04 08:41:54,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states 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 08:41:54,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:54,698 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:54,698 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 218 flow. Second operand 4 states and 593 transitions. [2023-08-04 08:41:54,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 99 transitions, 428 flow [2023-08-04 08:41:54,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 99 transitions, 419 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:41:54,804 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 223 flow [2023-08-04 08:41:54,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=223, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-08-04 08:41:54,805 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2023-08-04 08:41:54,806 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 223 flow [2023-08-04 08:41:54,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 08:41:54,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:54,806 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, 1, 1, 1, 1] [2023-08-04 08:41:54,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 08:41:55,012 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 08:41:55,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:55,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1951614378, now seen corresponding path program 1 times [2023-08-04 08:41:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:55,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199316106] [2023-08-04 08:41:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:55,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:55,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:55,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199316106] [2023-08-04 08:41:55,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199316106] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:55,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546401469] [2023-08-04 08:41:55,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:55,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:55,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:55,075 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 08:41:55,088 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 08:41:55,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:55,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:41:55,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:55,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 08:41:55,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546401469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:55,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:55,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:41:55,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653288863] [2023-08-04 08:41:55,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:55,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:55,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:55,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:55,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:55,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 267 [2023-08-04 08:41:55,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:41:55,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:55,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 267 [2023-08-04 08:41:55,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:56,656 INFO L124 PetriNetUnfolderBase]: 13632/21221 cut-off events. [2023-08-04 08:41:56,656 INFO L125 PetriNetUnfolderBase]: For 8755/8755 co-relation queries the response was YES. [2023-08-04 08:41:56,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46682 conditions, 21221 events. 13632/21221 cut-off events. For 8755/8755 co-relation queries the response was YES. Maximal size of possible extension queue 679. Compared 155502 event pairs, 5303 based on Foata normal form. 500/21246 useless extension candidates. Maximal degree in co-relation 44112. Up to 7668 conditions per place. [2023-08-04 08:41:56,745 INFO L140 encePairwiseOnDemand]: 263/267 looper letters, 79 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-08-04 08:41:56,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 107 transitions, 474 flow [2023-08-04 08:41:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:41:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:41:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-08-04 08:41:56,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627340823970037 [2023-08-04 08:41:56,747 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-08-04 08:41:56,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-08-04 08:41:56,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:56,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-08-04 08:41:56,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 08:41:56,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:56,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:56,751 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 223 flow. Second operand 4 states and 601 transitions. [2023-08-04 08:41:56,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 107 transitions, 474 flow [2023-08-04 08:41:56,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 464 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 08:41:56,814 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 234 flow [2023-08-04 08:41:56,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=234, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2023-08-04 08:41:56,815 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2023-08-04 08:41:56,815 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 234 flow [2023-08-04 08:41:56,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.2) internal successors, (681), 5 states have internal predecessors, (681), 0 states have call successors, (0), 0 states 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 08:41:56,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:56,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:56,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:57,021 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 08:41:57,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:57,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:57,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1287129808, now seen corresponding path program 1 times [2023-08-04 08:41:57,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:57,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884154436] [2023-08-04 08:41:57,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:57,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:41:57,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:41:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884154436] [2023-08-04 08:41:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884154436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:41:57,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978969410] [2023-08-04 08:41:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:57,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:41:57,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:41:57,116 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 08:41:57,119 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 08:41:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:41:57,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:41:57,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:41:57,218 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:41:57,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:41:57,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 08:41:57,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978969410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:41:57,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:41:57,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:41:57,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183410768] [2023-08-04 08:41:57,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:41:57,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:41:57,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:41:57,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:41:57,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:41:57,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 267 [2023-08-04 08:41:57,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 234 flow. Second operand has 5 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 08:41:57,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:41:57,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 267 [2023-08-04 08:41:57,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:41:58,967 INFO L124 PetriNetUnfolderBase]: 13616/21656 cut-off events. [2023-08-04 08:41:58,967 INFO L125 PetriNetUnfolderBase]: For 12278/12278 co-relation queries the response was YES. [2023-08-04 08:41:59,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49284 conditions, 21656 events. 13616/21656 cut-off events. For 12278/12278 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 162994 event pairs, 13009 based on Foata normal form. 21/21192 useless extension candidates. Maximal degree in co-relation 46650. Up to 18017 conditions per place. [2023-08-04 08:41:59,054 INFO L140 encePairwiseOnDemand]: 263/267 looper letters, 79 selfloop transitions, 3 changer transitions 2/108 dead transitions. [2023-08-04 08:41:59,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 486 flow [2023-08-04 08:41:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:41:59,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:41:59,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-08-04 08:41:59,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5627340823970037 [2023-08-04 08:41:59,058 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-08-04 08:41:59,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-08-04 08:41:59,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:41:59,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-08-04 08:41:59,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 08:41:59,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:59,062 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states 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 08:41:59,062 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 234 flow. Second operand 4 states and 601 transitions. [2023-08-04 08:41:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 486 flow [2023-08-04 08:41:59,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 108 transitions, 482 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:41:59,181 INFO L231 Difference]: Finished difference. Result has 85 places, 69 transitions, 238 flow [2023-08-04 08:41:59,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=238, PETRI_PLACES=85, PETRI_TRANSITIONS=69} [2023-08-04 08:41:59,182 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 19 predicate places. [2023-08-04 08:41:59,182 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 69 transitions, 238 flow [2023-08-04 08:41:59,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states 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 08:41:59,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:41:59,182 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:59,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 08:41:59,387 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 08:41:59,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:41:59,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:41:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 136079246, now seen corresponding path program 1 times [2023-08-04 08:41:59,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:41:59,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40425920] [2023-08-04 08:41:59,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:41:59,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:41:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:41:59,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:41:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:41:59,562 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:41:59,562 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:41:59,563 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:41:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 08:41:59,563 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:41:59,563 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 08:41:59,565 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 08:41:59,566 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 08:41:59,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 08:41:59 BasicIcfg [2023-08-04 08:41:59,652 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 08:41:59,652 INFO L158 Benchmark]: Toolchain (without parser) took 35400.82ms. Allocated memory was 532.7MB in the beginning and 12.5GB in the end (delta: 12.0GB). Free memory was 486.0MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. [2023-08-04 08:41:59,652 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 385.9MB. Free memory was 338.2MB in the beginning and 338.1MB in the end (delta: 153.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:41:59,653 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.65ms. Allocated memory is still 532.7MB. Free memory was 486.0MB in the beginning and 474.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 08:41:59,653 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.26ms. Allocated memory is still 532.7MB. Free memory was 474.2MB in the beginning and 472.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 08:41:59,653 INFO L158 Benchmark]: Boogie Preprocessor took 24.96ms. Allocated memory is still 532.7MB. Free memory was 472.1MB in the beginning and 470.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 08:41:59,653 INFO L158 Benchmark]: RCFGBuilder took 468.68ms. Allocated memory is still 532.7MB. Free memory was 470.8MB in the beginning and 450.8MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 08:41:59,653 INFO L158 Benchmark]: TraceAbstraction took 34634.00ms. Allocated memory was 532.7MB in the beginning and 12.5GB in the end (delta: 12.0GB). Free memory was 450.0MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-08-04 08:41:59,654 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 385.9MB. Free memory was 338.2MB in the beginning and 338.1MB in the end (delta: 153.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 236.65ms. Allocated memory is still 532.7MB. Free memory was 486.0MB in the beginning and 474.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.26ms. Allocated memory is still 532.7MB. Free memory was 474.2MB in the beginning and 472.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.96ms. Allocated memory is still 532.7MB. Free memory was 472.1MB in the beginning and 470.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 468.68ms. Allocated memory is still 532.7MB. Free memory was 470.8MB in the beginning and 450.8MB in the end (delta: 20.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 34634.00ms. Allocated memory was 532.7MB in the beginning and 12.5GB in the end (delta: 12.0GB). Free memory was 450.0MB in the beginning and 10.6GB in the end (delta: -10.1GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 123 PlacesBefore, 40 PlacesAfterwards, 128 TransitionsBefore, 39 TransitionsAfterwards, 2244 CoEnabledTransitionPairs, 7 FixpointIterations, 50 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 99 TotalNumberOfCompositions, 11024 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3783, independent: 3499, independent conditional: 0, independent unconditional: 3499, dependent: 284, dependent conditional: 0, dependent unconditional: 284, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1029, independent: 1011, independent conditional: 0, independent unconditional: 1011, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3783, independent: 2488, independent conditional: 0, independent unconditional: 2488, dependent: 266, dependent conditional: 0, dependent unconditional: 266, unknown: 1029, unknown conditional: 0, unknown unconditional: 1029] , Statistics on independence cache: Total cache size (in pairs): 166, Positive cache size: 153, Positive conditional cache size: 0, Positive unconditional cache size: 153, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 101 PlacesBefore, 32 PlacesAfterwards, 98 TransitionsBefore, 27 TransitionsAfterwards, 990 CoEnabledTransitionPairs, 7 FixpointIterations, 50 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 7 ConcurrentYvCompositions, 2 ChoiceCompositions, 77 TotalNumberOfCompositions, 4969 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2119, independent: 1862, independent conditional: 0, independent unconditional: 1862, dependent: 257, dependent conditional: 0, dependent unconditional: 257, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 484, independent: 468, independent conditional: 0, independent unconditional: 468, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2119, independent: 1394, independent conditional: 0, independent unconditional: 1394, dependent: 241, dependent conditional: 0, dependent unconditional: 241, unknown: 484, unknown conditional: 0, unknown unconditional: 484] , Statistics on independence cache: Total cache size (in pairs): 100, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 151 PlacesBefore, 66 PlacesAfterwards, 156 TransitionsBefore, 65 TransitionsAfterwards, 5896 CoEnabledTransitionPairs, 8 FixpointIterations, 50 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 101 TotalNumberOfCompositions, 44620 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 26035, independent: 25398, independent conditional: 0, independent unconditional: 25398, dependent: 637, dependent conditional: 0, dependent unconditional: 637, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2917, independent: 2849, independent conditional: 0, independent unconditional: 2849, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 26035, independent: 22549, independent conditional: 0, independent unconditional: 22549, dependent: 569, dependent conditional: 0, dependent unconditional: 569, unknown: 2917, unknown conditional: 0, unknown unconditional: 2917] , Statistics on independence cache: Total cache size (in pairs): 917, Positive cache size: 876, Positive conditional cache size: 0, Positive unconditional cache size: 876, Negative cache size: 41, Negative conditional cache size: 0, Negative unconditional cache size: 41, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 130]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] 0 _Bool e1, e2; [L39] 0 int n1, n2, i, i1, i2; [L110] 0 pthread_t t1[2], t2[2]; [L113] 0 e1 = __VERIFIER_nondet_bool() [L114] 0 e2 = __VERIFIER_nondet_bool() [L115] 0 n1 = __VERIFIER_nondet_int() [L116] 0 n2 = __VERIFIER_nondet_int() [L117] 0 i = __VERIFIER_nondet_int() [L118] 0 i1 = __VERIFIER_nondet_int() [L119] 0 i2 = __VERIFIER_nondet_int() [L122] CALL 0 assume_abort_if_not( ( i == 0 ) && ( e1 == 0 ) && ( e2 == 0 ) && ( n1 == 0 ) && ( n2 == 0 ) ) [L35] COND FALSE 0 !(!cond) [L122] RET 0 assume_abort_if_not( ( i == 0 ) && ( e1 == 0 ) && ( e2 == 0 ) && ( n1 == 0 ) && ( n2 == 0 ) ) [L124] 0 int asdf=0; VAL [asdf=0, e1=0, e2=0, i=0, i=0, i=0, n1=0, n2=0, t1={5:0}, t2={3:0}] [L124] COND TRUE 0 asdf<2 [L124] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [asdf=0, e1=0, e2=0, i=0, i=0, i=0, n1=0, n2=0, pthread_create(&t1[asdf], 0, thread1, 0)=-4, t1={5:0}, t2={3:0}] [L43] 1 e1 = 1 VAL [e1=1, e2=0, i=0, i=0, i=0, n1=0, n2=0] [L46] 1 n1 = (n1 < n2) ? n2 : n1 VAL [e1=1, e2=0, i=0, i=0, i=0, n1=0, n2=0] [L49] 1 n1++ VAL [e1=1, e2=0, i=0, i=0, i=0, n1=1, n2=0] [L52] 1 e1 = 0 VAL [e1=0, e2=0, i=0, i=0, i=0, n1=1, n2=0] [L56] CALL 1 assume_abort_if_not(!e2) [L35] COND FALSE 1 !(!cond) [L56] RET 1 assume_abort_if_not(!e2) [L124] 0 asdf++ VAL [asdf=1, e1=0, e2=0, i=0, i=0, i=0, n1=1, n2=0, t1={5:0}, t2={3:0}] [L124] COND TRUE 0 asdf<2 [L124] FCALL, FORK 0 pthread_create(&t1[asdf], 0, thread1, 0) VAL [asdf=1, e1=0, e2=0, i=0, i=0, i=0, n1=1, n2=0, pthread_create(&t1[asdf], 0, thread1, 0)=-3, t1={5:0}, t2={3:0}] [L43] 2 e1 = 1 VAL [e1=1, e2=0, i=0, i=0, i=0, n1=1, n2=0] [L46] 2 n1 = (n1 < n2) ? n2 : n1 VAL [e1=1, e2=0, i=0, i=0, i=0, n1=1, n2=0] [L49] 2 n1++ VAL [e1=1, e2=0, i=0, i=0, i=0, n1=2, n2=0] [L52] 2 e1 = 0 VAL [e1=0, e2=0, i=0, i=0, i=0, n1=2, n2=0] [L56] CALL 2 assume_abort_if_not(!e2) [L35] COND FALSE 2 !(!cond) [L56] RET 2 assume_abort_if_not(!e2) [L124] 0 asdf++ VAL [asdf=2, e1=0, e2=0, i=0, i=0, i=0, n1=2, n2=0, t1={5:0}, t2={3:0}] [L59] CALL 1 assume_abort_if_not( !( ( n2 != 0 ) && ( ( n2 < n1 ) || ( ( n2 == n1 ) && ( 2 < 1 ) ) ) ) ) [L35] COND FALSE 1 !(!cond) [L59] RET 1 assume_abort_if_not( !( ( n2 != 0 ) && ( ( n2 < n1 ) || ( ( n2 == n1 ) && ( 2 < 1 ) ) ) ) ) [L63] 1 i1 = i VAL [e1=0, e2=0, i=0, i=0, i=0, n1=2, n2=0] [L66] 1 i = i1 + 1 VAL [e1=0, e2=0, i=0, i=0, i=1, n1=2, n2=0] [L69] 1 n1 = 0 [L72] 1 return 0; [L124] COND FALSE 0 !(asdf<2) [L125] 0 int asdf=0; VAL [asdf=0, asdf=2, e1=0, e2=0, i=0, i=0, i=1, n1=0, n2=0, t1={5:0}, t2={3:0}] [L125] COND TRUE 0 asdf<2 [L125] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [asdf=0, asdf=2, e1=0, e2=0, i=0, i=0, i=1, n1=0, n2=0, pthread_create(&t2[asdf], 0, thread2, 0)=-2, t1={5:0}, t2={3:0}] [L77] 3 e2 = 1 VAL [e1=0, e2=1, i=0, i=0, i=1, n1=0, n2=0] [L80] 3 n2 = (n2 < n1) ? n1 : n2 VAL [e1=0, e2=1, i=0, i=0, i=1, n1=0, n2=0] [L83] 3 n2++ VAL [e1=0, e2=1, i=0, i=0, i=1, n1=0, n2=1] [L86] 3 e2 = 0 VAL [e1=0, e2=0, i=0, i=0, i=1, n1=0, n2=1] [L90] CALL 3 assume_abort_if_not(!e1) [L35] COND FALSE 3 !(!cond) [L90] RET 3 assume_abort_if_not(!e1) [L59] CALL 2 assume_abort_if_not( !( ( n2 != 0 ) && ( ( n2 < n1 ) || ( ( n2 == n1 ) && ( 2 < 1 ) ) ) ) ) [L35] COND FALSE 2 !(!cond) [L59] RET 2 assume_abort_if_not( !( ( n2 != 0 ) && ( ( n2 < n1 ) || ( ( n2 == n1 ) && ( 2 < 1 ) ) ) ) ) [L63] 2 i1 = i VAL [\result={0:0}, e1=0, e2=0, i=0, i=1, i=1, n1=0, n2=1] [L66] 2 i = i1 + 1 VAL [\result={0:0}, e1=0, e2=0, i=0, i=1, i=2, n1=0, n2=1] [L69] 2 n1 = 0 [L72] 2 return 0; [L125] 0 asdf++ VAL [asdf=1, asdf=2, e1=0, e2=0, i=0, i=1, i=2, n1=0, n2=1, t1={5:0}, t2={3:0}] [L125] COND TRUE 0 asdf<2 [L125] FCALL, FORK 0 pthread_create(&t2[asdf], 0, thread2, 0) VAL [asdf=1, asdf=2, e1=0, e2=0, i=0, i=1, i=2, n1=0, n2=1, pthread_create(&t2[asdf], 0, thread2, 0)=-1, t1={5:0}, t2={3:0}] [L77] 4 e2 = 1 VAL [e1=0, e2=1, i=0, i=1, i=2, n1=0, n2=1] [L80] 4 n2 = (n2 < n1) ? n1 : n2 VAL [e1=0, e2=1, i=0, i=1, i=2, n1=0, n2=1] [L83] 4 n2++ VAL [e1=0, e2=1, i=0, i=1, i=2, n1=0, n2=2] [L86] 4 e2 = 0 VAL [e1=0, e2=0, i=0, i=1, i=2, n1=0, n2=2] [L90] CALL 4 assume_abort_if_not(!e1) [L35] COND FALSE 4 !(!cond) [L90] RET 4 assume_abort_if_not(!e1) [L125] 0 asdf++ VAL [asdf=2, asdf=2, e1=0, e2=0, i=0, i=1, i=2, n1=0, n2=2, t1={5:0}, t2={3:0}] [L93] CALL 3 assume_abort_if_not( !( ( n1 != 0 ) && ( ( n1 < n2 ) || ( ( n1 == n2 ) && ( 1 < 2 ) ) ) ) ) [L35] COND FALSE 3 !(!cond) [L93] RET 3 assume_abort_if_not( !( ( n1 != 0 ) && ( ( n1 < n2 ) || ( ( n1 == n2 ) && ( 1 < 2 ) ) ) ) ) [L97] 3 i2 = i VAL [e1=0, e2=0, i=1, i=2, i=2, n1=0, n2=2] [L100] 3 i = i2 + 1 VAL [e1=0, e2=0, i=1, i=2, i=3, n1=0, n2=2] [L103] 3 n2 = 0 [L106] 3 return 0; [L125] COND FALSE 0 !(asdf<2) [L126] 0 int asdf=0; VAL [asdf=0, asdf=2, asdf=2, e1=0, e2=0, i=1, i=2, i=3, n1=0, n2=0, t1={5:0}, t2={3:0}] [L126] COND TRUE 0 asdf<2 [L126] 0 t1[asdf] VAL [asdf=0, asdf=2, asdf=2, e1=0, e2=0, i=1, i=2, i=3, n1=0, n2=0, t1={5:0}, t1[asdf]=-4, t2={3:0}] [L93] CALL 4 assume_abort_if_not( !( ( n1 != 0 ) && ( ( n1 < n2 ) || ( ( n1 == n2 ) && ( 1 < 2 ) ) ) ) ) [L35] COND FALSE 4 !(!cond) [L93] RET 4 assume_abort_if_not( !( ( n1 != 0 ) && ( ( n1 < n2 ) || ( ( n1 == n2 ) && ( 1 < 2 ) ) ) ) ) [L97] 4 i2 = i VAL [\result={0:0}, e1=0, e2=0, i=1, i=3, i=3, n1=0, n2=0] [L100] 4 i = i2 + 1 VAL [\result={0:0}, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0] [L103] 4 n2 = 0 [L106] 4 return 0; [L126] FCALL, JOIN 1 pthread_join(t1[asdf], 0) VAL [asdf=0, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t1[asdf]=-4, t2={3:0}] [L126] 0 asdf++ VAL [asdf=1, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}] [L126] COND TRUE 0 asdf<2 [L126] 0 t1[asdf] VAL [asdf=1, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t1[asdf]=-3, t2={3:0}] [L126] FCALL, JOIN 2 pthread_join(t1[asdf], 0) VAL [asdf=1, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t1[asdf]=-3, t2={3:0}] [L126] 0 asdf++ VAL [asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}] [L126] COND FALSE 0 !(asdf<2) [L127] 0 int asdf=0; VAL [asdf=0, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}] [L127] COND TRUE 0 asdf<2 [L127] 0 t2[asdf] VAL [asdf=0, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}, t2[asdf]=-2] [L127] FCALL, JOIN 3 pthread_join(t2[asdf], 0) VAL [asdf=0, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}, t2[asdf]=-2] [L127] 0 asdf++ VAL [asdf=1, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}] [L127] COND TRUE 0 asdf<2 [L127] 0 t2[asdf] VAL [asdf=1, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}, t2[asdf]=-1] [L127] FCALL, JOIN 4 pthread_join(t2[asdf], 0) VAL [asdf=1, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}, t2[asdf]=-1] [L127] 0 asdf++ VAL [asdf=2, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}] [L127] COND FALSE 0 !(asdf<2) [L129] CALL 0 assume_abort_if_not( i != 2 ) [L35] COND FALSE 0 !(!cond) [L129] RET 0 assume_abort_if_not( i != 2 ) [L130] 0 reach_error() VAL [asdf=2, asdf=2, asdf=2, asdf=2, e1=0, e2=0, i=1, i=3, i=4, n1=0, n2=0, t1={5:0}, t2={3:0}] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 153 locations, 3 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: 5.4s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 120 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 71 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 301 IncrementalHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 9 mSDtfsCounter, 301 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=4, InterpolantAutomatonStates: 16, 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 475 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 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 7 procedures, 177 locations, 3 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: 26.8s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 21.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 362 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 287 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1004 IncrementalHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 25 mSDtfsCounter, 1004 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 440 GetRequests, 410 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=8, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 552 NumberOfCodeBlocks, 552 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 649 ConstructedInterpolants, 0 QuantifiedInterpolants, 847 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1095 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 132/147 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 5 procedures, 153 locations, 3 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: 2.3s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 40 IncrementalHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 40 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=72occurred 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, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-04 08:41:59,676 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...