/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-6_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:31:34,282 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:31:34,329 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:31:34,332 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:31:34,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:31:34,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:31:34,336 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:31:34,356 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:31:34,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:31:34,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:31:34,357 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:31:34,357 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:31:34,358 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:31:34,358 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:31:34,359 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:31:34,359 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:31:34,359 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:31:34,359 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:31:34,360 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:31:34,360 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:31:34,360 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:31:34,361 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:31:34,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:31:34,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:31:34,362 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:31:34,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:31:34,362 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:31:34,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:31:34,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:31:34,363 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:31:34,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:31:34,364 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:31:34,364 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:31:34,364 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:31:34,364 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:31:34,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:31:34,365 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:31:34,365 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:31:34,365 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:31:34,366 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:31:34,366 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:31:34,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:31:34,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:31:34,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:31:34,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:31:34,580 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:31:34,580 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:31:34,581 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-6_bound2.i [2023-08-04 01:31:35,728 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:31:35,972 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:31:35,972 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-6_bound2.i [2023-08-04 01:31:35,994 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fcaabdc/61ff4f513c6b47b593a9e565ba519d5b/FLAG1e077915e [2023-08-04 01:31:36,009 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51fcaabdc/61ff4f513c6b47b593a9e565ba519d5b [2023-08-04 01:31:36,011 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:31:36,012 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:31:36,013 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:31:36,014 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:31:36,019 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:31:36,020 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,021 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b2cfa81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36, skipping insertion in model container [2023-08-04 01:31:36,021 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,053 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:31:36,298 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-6_bound2.i[30243,30256] [2023-08-04 01:31:36,319 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:31:36,330 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:31:36,357 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [229] [2023-08-04 01:31:36,358 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [230] [2023-08-04 01:31:36,381 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_fib_unsafe-6_bound2.i[30243,30256] [2023-08-04 01:31:36,388 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:31:36,414 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:31:36,414 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:31:36,420 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:31:36,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36 WrapperNode [2023-08-04 01:31:36,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:31:36,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:31:36,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:31:36,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:31:36,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,477 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 92 [2023-08-04 01:31:36,477 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:31:36,478 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:31:36,478 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:31:36,478 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:31:36,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,491 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,513 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:31:36,522 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:31:36,522 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:31:36,522 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:31:36,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (1/1) ... [2023-08-04 01:31:36,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:31:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:36,566 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 01:31:36,585 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 01:31:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-04 01:31:36,605 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-04 01:31:36,605 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-04 01:31:36,606 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-04 01:31:36,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:31:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:31:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:31:36,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:31:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:31:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:31:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:31:36,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:31:36,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:31:36,610 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 01:31:36,761 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:31:36,763 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:31:36,942 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:31:36,948 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:31:36,949 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 01:31:36,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:31:36 BoogieIcfgContainer [2023-08-04 01:31:36,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:31:36,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:31:36,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:31:36,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:31:36,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:31:36" (1/3) ... [2023-08-04 01:31:36,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb9879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:31:36, skipping insertion in model container [2023-08-04 01:31:36,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:31:36" (2/3) ... [2023-08-04 01:31:36,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb9879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:31:36, skipping insertion in model container [2023-08-04 01:31:36,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:31:36" (3/3) ... [2023-08-04 01:31:36,958 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_fib_unsafe-6_bound2.i [2023-08-04 01:31:36,968 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:31:36,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:31:36,976 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:31:36,976 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:31:37,025 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:31:37,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 01:31:37,159 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 01:31:37,160 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:31:37,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 01:31:37,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 01:31:37,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 107 transitions, 224 flow [2023-08-04 01:31:37,176 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:31:37,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 01:31:37,186 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 107 transitions, 224 flow [2023-08-04 01:31:37,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 107 transitions, 224 flow [2023-08-04 01:31:37,228 INFO L124 PetriNetUnfolderBase]: 24/249 cut-off events. [2023-08-04 01:31:37,229 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:31:37,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 249 events. 24/249 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 816 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 138. Up to 8 conditions per place. [2023-08-04 01:31:37,234 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-08-04 01:31:40,367 INFO L134 LiptonReduction]: Checked pairs total: 2006 [2023-08-04 01:31:40,368 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 01:31:40,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:31:40,384 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;@3320190d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:31:40,384 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:31:40,390 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:31:40,390 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-04 01:31:40,390 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:31:40,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:40,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:31:40,391 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:31:40,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:40,396 INFO L85 PathProgramCache]: Analyzing trace with hash -465714586, now seen corresponding path program 1 times [2023-08-04 01:31:40,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:40,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318463796] [2023-08-04 01:31:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:31:40,499 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:31:40,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:31:40,535 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:31:40,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:31:40,538 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:31:40,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:31:40,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:31:40,540 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:31:40,543 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-04 01:31:40,543 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:31:40,543 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:31:40,563 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:31:40,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:40,634 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:31:40,634 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:31:40,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:31:40,639 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:40,642 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:40,642 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:31:40,643 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:40,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:40,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:40,715 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:31:40,715 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:31:40,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:31:40,727 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 01:31:43,388 INFO L134 LiptonReduction]: Checked pairs total: 12612 [2023-08-04 01:31:43,388 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-04 01:31:43,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:31:43,391 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;@3320190d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:31:43,391 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 01:31:43,399 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:31:43,399 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2023-08-04 01:31:43,399 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 01:31:43,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:43,400 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:31:43,400 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:31:43,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:43,401 INFO L85 PathProgramCache]: Analyzing trace with hash 479947437, now seen corresponding path program 1 times [2023-08-04 01:31:43,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:43,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375612485] [2023-08-04 01:31:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:43,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:31:43,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375612485] [2023-08-04 01:31:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375612485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638125522] [2023-08-04 01:31:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:43,597 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 01:31:43,628 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 01:31:43,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:43,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:31:43,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:31:43,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:31:43,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638125522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:31:43,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:31:43,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:31:43,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610657475] [2023-08-04 01:31:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:31:43,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:31:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:31:43,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:31:43,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:43,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 01:31:43,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:43,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:43,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:44,364 INFO L124 PetriNetUnfolderBase]: 3357/5430 cut-off events. [2023-08-04 01:31:44,364 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2023-08-04 01:31:44,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 5430 events. 3357/5430 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 31273 event pairs, 988 based on Foata normal form. 0/4875 useless extension candidates. Maximal degree in co-relation 2971. Up to 4348 conditions per place. [2023-08-04 01:31:44,389 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 30 selfloop transitions, 5 changer transitions 4/54 dead transitions. [2023-08-04 01:31:44,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 54 transitions, 206 flow [2023-08-04 01:31:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:31:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:31:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-08-04 01:31:44,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510548523206751 [2023-08-04 01:31:44,412 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-08-04 01:31:44,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-08-04 01:31:44,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:44,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-08-04 01:31:44,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states 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 01:31:44,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 01:31:44,436 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 01:31:44,441 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 5 states and 605 transitions. [2023-08-04 01:31:44,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 54 transitions, 206 flow [2023-08-04 01:31:44,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 54 transitions, 203 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 01:31:44,449 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 114 flow [2023-08-04 01:31:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 01:31:44,455 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 01:31:44,456 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 114 flow [2023-08-04 01:31:44,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states 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 01:31:44,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:44,456 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 01:31:44,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 01:31:44,662 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 01:31:44,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:31:44,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:44,663 INFO L85 PathProgramCache]: Analyzing trace with hash -870270021, now seen corresponding path program 1 times [2023-08-04 01:31:44,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:44,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176194920] [2023-08-04 01:31:44,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:31:44,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:44,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176194920] [2023-08-04 01:31:44,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176194920] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:31:44,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:31:44,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:31:44,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536825821] [2023-08-04 01:31:44,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:31:44,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:31:44,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:31:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:31:44,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:31:44,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 01:31:44,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:44,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:31:44,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:44,920 INFO L124 PetriNetUnfolderBase]: 1495/2521 cut-off events. [2023-08-04 01:31:44,921 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-08-04 01:31:44,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 2521 events. 1495/2521 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13330 event pairs, 642 based on Foata normal form. 1/2474 useless extension candidates. Maximal degree in co-relation 1471. Up to 1975 conditions per place. [2023-08-04 01:31:44,938 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 26 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2023-08-04 01:31:44,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 43 transitions, 175 flow [2023-08-04 01:31:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:31:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:31:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-04 01:31:44,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203938115330521 [2023-08-04 01:31:44,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-04 01:31:44,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-04 01:31:44,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:44,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-04 01:31:44,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states 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 01:31:44,943 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 01:31:44,943 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 01:31:44,944 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 114 flow. Second operand 3 states and 370 transitions. [2023-08-04 01:31:44,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 43 transitions, 175 flow [2023-08-04 01:31:44,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:31:44,947 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 112 flow [2023-08-04 01:31:44,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=45, 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=112, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-08-04 01:31:44,948 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 01:31:44,948 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 112 flow [2023-08-04 01:31:44,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states 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 01:31:44,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:44,949 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:44,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 01:31:44,951 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:31:44,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash 340037557, now seen corresponding path program 1 times [2023-08-04 01:31:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800230385] [2023-08-04 01:31:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:44,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:45,053 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 01:31:45,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:45,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800230385] [2023-08-04 01:31:45,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800230385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:45,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688138381] [2023-08-04 01:31:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:45,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:45,058 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 01:31:45,084 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 01:31:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:45,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:31:45,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:45,163 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 01:31:45,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:45,188 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 01:31:45,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688138381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:45,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:45,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:31:45,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080046426] [2023-08-04 01:31:45,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:45,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:31:45,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:31:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:31:45,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:45,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:31:45,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:45,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:45,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:45,378 INFO L124 PetriNetUnfolderBase]: 1216/1990 cut-off events. [2023-08-04 01:31:45,379 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-04 01:31:45,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3751 conditions, 1990 events. 1216/1990 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9633 event pairs, 306 based on Foata normal form. 3/1961 useless extension candidates. Maximal degree in co-relation 1484. Up to 1549 conditions per place. [2023-08-04 01:31:45,394 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 30 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-04 01:31:45,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 48 transitions, 195 flow [2023-08-04 01:31:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:31:45,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:31:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-04 01:31:45,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126582278481012 [2023-08-04 01:31:45,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-04 01:31:45,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-04 01:31:45,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:45,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-04 01:31:45,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 01:31:45,399 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 01:31:45,400 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 01:31:45,400 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 112 flow. Second operand 4 states and 486 transitions. [2023-08-04 01:31:45,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 48 transitions, 195 flow [2023-08-04 01:31:45,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:31:45,402 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 109 flow [2023-08-04 01:31:45,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-04 01:31:45,403 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 01:31:45,403 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 109 flow [2023-08-04 01:31:45,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:31:45,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:45,404 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:45,409 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 01:31:45,609 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,SelfDestructingSolverStorable3 [2023-08-04 01:31:45,609 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 01:31:45,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash 535273550, now seen corresponding path program 1 times [2023-08-04 01:31:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160217257] [2023-08-04 01:31:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:31:45,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160217257] [2023-08-04 01:31:45,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160217257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:45,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95866833] [2023-08-04 01:31:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:45,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:45,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:45,678 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 01:31:45,706 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 01:31:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:45,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:31:45,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:31:45,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:31:45,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95866833] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:31:45,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:31:45,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:31:45,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131082990] [2023-08-04 01:31:45,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:31:45,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:31:45,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:45,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:31:45,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:31:45,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:45,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 109 flow. Second operand has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:31:45,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:45,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:45,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:45,952 INFO L124 PetriNetUnfolderBase]: 892/1357 cut-off events. [2023-08-04 01:31:45,952 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2023-08-04 01:31:45,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2695 conditions, 1357 events. 892/1357 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5175 event pairs, 22 based on Foata normal form. 81/1422 useless extension candidates. Maximal degree in co-relation 1060. Up to 567 conditions per place. [2023-08-04 01:31:45,956 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2023-08-04 01:31:45,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 267 flow [2023-08-04 01:31:45,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:31:45,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:31:45,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 617 transitions. [2023-08-04 01:31:45,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5206751054852321 [2023-08-04 01:31:45,959 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 617 transitions. [2023-08-04 01:31:45,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 617 transitions. [2023-08-04 01:31:45,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:45,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 617 transitions. [2023-08-04 01:31:45,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.4) internal successors, (617), 5 states have internal predecessors, (617), 0 states have call successors, (0), 0 states 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 01:31:45,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 01:31:45,963 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 237.0) internal successors, (1422), 6 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states 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 01:31:45,964 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 109 flow. Second operand 5 states and 617 transitions. [2023-08-04 01:31:45,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 267 flow [2023-08-04 01:31:45,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:31:45,967 INFO L231 Difference]: Finished difference. Result has 47 places, 0 transitions, 0 flow [2023-08-04 01:31:45,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=47, PETRI_TRANSITIONS=0} [2023-08-04 01:31:45,969 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 1 predicate places. [2023-08-04 01:31:45,969 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 0 transitions, 0 flow [2023-08-04 01:31:45,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.6) internal successors, (578), 5 states have internal predecessors, (578), 0 states have call successors, (0), 0 states 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 01:31:45,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 01:31:45,970 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 01:31:45,980 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 01:31:46,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:46,177 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 01:31:46,177 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-04 01:31:46,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:46,216 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:31:46,216 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:31:46,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:31:46,219 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:46,221 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:46,221 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:31:46,221 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:46,221 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:46,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 131 transitions, 286 flow [2023-08-04 01:31:46,254 INFO L124 PetriNetUnfolderBase]: 55/537 cut-off events. [2023-08-04 01:31:46,255 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 01:31:46,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 570 conditions, 537 events. 55/537 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2480 event pairs, 0 based on Foata normal form. 0/461 useless extension candidates. Maximal degree in co-relation 379. Up to 18 conditions per place. [2023-08-04 01:31:46,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 01:31:48,728 INFO L134 LiptonReduction]: Checked pairs total: 12612 [2023-08-04 01:31:48,728 INFO L136 LiptonReduction]: Total number of compositions: 106 [2023-08-04 01:31:48,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:31:48,731 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;@3320190d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:31:48,731 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:31:48,732 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:31:48,732 INFO L124 PetriNetUnfolderBase]: 1/7 cut-off events. [2023-08-04 01:31:48,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:31:48,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:48,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 01:31:48,733 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:48,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:48,733 INFO L85 PathProgramCache]: Analyzing trace with hash 24206885, now seen corresponding path program 1 times [2023-08-04 01:31:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:48,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297208441] [2023-08-04 01:31:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:48,769 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 01:31:48,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:48,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297208441] [2023-08-04 01:31:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297208441] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:31:48,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:31:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:31:48,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117875083] [2023-08-04 01:31:48,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:31:48,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:31:48,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:48,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:31:48,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:31:48,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:31:48,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 01:31:48,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:48,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:31:48,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:49,089 INFO L124 PetriNetUnfolderBase]: 3244/5230 cut-off events. [2023-08-04 01:31:49,089 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-04 01:31:49,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9663 conditions, 5230 events. 3244/5230 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 29355 event pairs, 1386 based on Foata normal form. 0/4639 useless extension candidates. Maximal degree in co-relation 3014. Up to 4201 conditions per place. [2023-08-04 01:31:49,122 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 28 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2023-08-04 01:31:49,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 47 transitions, 180 flow [2023-08-04 01:31:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:31:49,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:31:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 01:31:49,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5260196905766527 [2023-08-04 01:31:49,127 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 01:31:49,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 01:31:49,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:49,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 01:31:49,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:31:49,130 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 01:31:49,130 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 01:31:49,130 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 108 flow. Second operand 3 states and 374 transitions. [2023-08-04 01:31:49,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 47 transitions, 180 flow [2023-08-04 01:31:49,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 176 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-04 01:31:49,134 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 106 flow [2023-08-04 01:31:49,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-04 01:31:49,136 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-04 01:31:49,136 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 106 flow [2023-08-04 01:31:49,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states 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 01:31:49,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:49,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:49,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 01:31:49,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:49,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash -442104601, now seen corresponding path program 1 times [2023-08-04 01:31:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:49,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367930712] [2023-08-04 01:31:49,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:49,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:49,177 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 01:31:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367930712] [2023-08-04 01:31:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367930712] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109896213] [2023-08-04 01:31:49,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:49,179 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 01:31:49,204 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 01:31:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:49,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:31:49,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:49,260 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 01:31:49,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:31:49,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109896213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:31:49,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:31:49,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:31:49,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872592693] [2023-08-04 01:31:49,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:31:49,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:31:49,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:49,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:31:49,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:31:49,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:31:49,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 106 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 01:31:49,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:49,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:31:49,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:49,546 INFO L124 PetriNetUnfolderBase]: 2665/4138 cut-off events. [2023-08-04 01:31:49,547 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 01:31:49,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7764 conditions, 4138 events. 2665/4138 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 20626 event pairs, 1120 based on Foata normal form. 0/3788 useless extension candidates. Maximal degree in co-relation 7725. Up to 3271 conditions per place. [2023-08-04 01:31:49,573 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 35 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-04 01:31:49,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 51 transitions, 202 flow [2023-08-04 01:31:49,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:31:49,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:31:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 01:31:49,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 01:31:49,575 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 01:31:49,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 01:31:49,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:49,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 01:31:49,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:31:49,578 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 01:31:49,578 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 01:31:49,578 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 106 flow. Second operand 3 states and 379 transitions. [2023-08-04 01:31:49,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 51 transitions, 202 flow [2023-08-04 01:31:49,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 51 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:31:49,580 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 116 flow [2023-08-04 01:31:49,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2023-08-04 01:31:49,581 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-04 01:31:49,581 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 116 flow [2023-08-04 01:31:49,582 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 01:31:49,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:49,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:49,592 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 01:31:49,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:49,787 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:49,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash -240849557, now seen corresponding path program 1 times [2023-08-04 01:31:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:49,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733688852] [2023-08-04 01:31:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:49,844 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 01:31:49,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733688852] [2023-08-04 01:31:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733688852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:49,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011288171] [2023-08-04 01:31:49,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:49,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:49,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:49,847 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 01:31:49,849 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 01:31:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:49,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:31:49,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:49,927 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 01:31:49,928 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:31:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011288171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:31:49,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:31:49,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 01:31:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757552627] [2023-08-04 01:31:49,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:31:49,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:31:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:49,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:31:49,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:31:49,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 237 [2023-08-04 01:31:49,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 01:31:49,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:49,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 237 [2023-08-04 01:31:49,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:50,219 INFO L124 PetriNetUnfolderBase]: 3169/4738 cut-off events. [2023-08-04 01:31:50,220 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2023-08-04 01:31:50,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9346 conditions, 4738 events. 3169/4738 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 22999 event pairs, 1310 based on Foata normal form. 0/4489 useless extension candidates. Maximal degree in co-relation 2910. Up to 2655 conditions per place. [2023-08-04 01:31:50,251 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 38 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 01:31:50,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 54 transitions, 222 flow [2023-08-04 01:31:50,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:31:50,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:31:50,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-04 01:31:50,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358649789029536 [2023-08-04 01:31:50,253 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-04 01:31:50,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-04 01:31:50,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:50,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-04 01:31:50,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states 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 01:31:50,255 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 01:31:50,255 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 01:31:50,255 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 116 flow. Second operand 3 states and 381 transitions. [2023-08-04 01:31:50,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 54 transitions, 222 flow [2023-08-04 01:31:50,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:31:50,257 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 126 flow [2023-08-04 01:31:50,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2023-08-04 01:31:50,258 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2023-08-04 01:31:50,259 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 126 flow [2023-08-04 01:31:50,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states 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 01:31:50,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:50,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:50,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 01:31:50,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:50,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:50,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1123599108, now seen corresponding path program 1 times [2023-08-04 01:31:50,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:50,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617479583] [2023-08-04 01:31:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:50,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:50,509 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 01:31:50,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617479583] [2023-08-04 01:31:50,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617479583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:50,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162609668] [2023-08-04 01:31:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:50,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:50,514 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 01:31:50,538 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 01:31:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:50,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:31:50,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:50,605 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 01:31:50,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:50,618 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 01:31:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162609668] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:50,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:31:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066246060] [2023-08-04 01:31:50,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:50,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:31:50,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:31:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:31:50,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:50,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 01:31:50,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:50,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:50,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:50,913 INFO L124 PetriNetUnfolderBase]: 2557/3808 cut-off events. [2023-08-04 01:31:50,914 INFO L125 PetriNetUnfolderBase]: For 366/366 co-relation queries the response was YES. [2023-08-04 01:31:50,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7869 conditions, 3808 events. 2557/3808 cut-off events. For 366/366 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17633 event pairs, 690 based on Foata normal form. 3/3626 useless extension candidates. Maximal degree in co-relation 5074. Up to 3196 conditions per place. [2023-08-04 01:31:50,931 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 35 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 01:31:50,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 53 transitions, 226 flow [2023-08-04 01:31:50,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:31:50,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:31:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-04 01:31:50,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168776371308017 [2023-08-04 01:31:50,933 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-04 01:31:50,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-04 01:31:50,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:50,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-04 01:31:50,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states 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 01:31:50,936 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 01:31:50,936 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 01:31:50,936 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 126 flow. Second operand 4 states and 490 transitions. [2023-08-04 01:31:50,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 53 transitions, 226 flow [2023-08-04 01:31:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 53 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:31:50,938 INFO L231 Difference]: Finished difference. Result has 54 places, 42 transitions, 138 flow [2023-08-04 01:31:50,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2023-08-04 01:31:50,939 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2023-08-04 01:31:50,939 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 138 flow [2023-08-04 01:31:50,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states 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 01:31:50,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:50,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:50,949 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 01:31:51,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:51,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:51,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash 757811523, now seen corresponding path program 1 times [2023-08-04 01:31:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:51,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570392658] [2023-08-04 01:31:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:51,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:31:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570392658] [2023-08-04 01:31:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570392658] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011981949] [2023-08-04 01:31:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:51,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:51,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:51,203 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 01:31:51,225 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 01:31:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:51,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:31:51,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:31:51,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:31:51,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011981949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:51,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:51,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:31:51,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920309192] [2023-08-04 01:31:51,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:51,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:31:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:31:51,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:31:51,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:51,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 01:31:51,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:51,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:51,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:51,538 INFO L124 PetriNetUnfolderBase]: 2269/3139 cut-off events. [2023-08-04 01:31:51,538 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-04 01:31:51,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6643 conditions, 3139 events. 2269/3139 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11836 event pairs, 508 based on Foata normal form. 27/3042 useless extension candidates. Maximal degree in co-relation 4601. Up to 1768 conditions per place. [2023-08-04 01:31:51,556 INFO L140 encePairwiseOnDemand]: 233/237 looper letters, 47 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 01:31:51,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 65 transitions, 286 flow [2023-08-04 01:31:51,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:31:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:31:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 01:31:51,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295358649789029 [2023-08-04 01:31:51,558 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 01:31:51,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 01:31:51,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:51,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 01:31:51,559 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 01:31:51,561 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 01:31:51,561 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 01:31:51,561 INFO L175 Difference]: Start difference. First operand has 54 places, 42 transitions, 138 flow. Second operand 4 states and 502 transitions. [2023-08-04 01:31:51,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 65 transitions, 286 flow [2023-08-04 01:31:51,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 279 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:31:51,563 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 145 flow [2023-08-04 01:31:51,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=145, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-04 01:31:51,564 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2023-08-04 01:31:51,564 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 145 flow [2023-08-04 01:31:51,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 01:31:51,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:51,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:51,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 01:31:51,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:51,771 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:51,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:51,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1309232034, now seen corresponding path program 1 times [2023-08-04 01:31:51,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:51,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921542112] [2023-08-04 01:31:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:51,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921542112] [2023-08-04 01:31:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921542112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024044932] [2023-08-04 01:31:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:51,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:51,827 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 01:31:51,829 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 01:31:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:51,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:31:51,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:51,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:51,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024044932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:51,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:51,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-04 01:31:51,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488820588] [2023-08-04 01:31:51,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:51,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 01:31:51,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:51,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 01:31:51,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 01:31:51,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:51,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 145 flow. Second operand has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 01:31:51,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:51,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:51,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:52,241 INFO L124 PetriNetUnfolderBase]: 2917/4003 cut-off events. [2023-08-04 01:31:52,242 INFO L125 PetriNetUnfolderBase]: For 1000/1000 co-relation queries the response was YES. [2023-08-04 01:31:52,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8865 conditions, 4003 events. 2917/4003 cut-off events. For 1000/1000 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15093 event pairs, 784 based on Foata normal form. 0/3858 useless extension candidates. Maximal degree in co-relation 4151. Up to 1587 conditions per place. [2023-08-04 01:31:52,268 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 74 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2023-08-04 01:31:52,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 93 transitions, 411 flow [2023-08-04 01:31:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 01:31:52,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 01:31:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-04 01:31:52,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5330520393811533 [2023-08-04 01:31:52,271 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-04 01:31:52,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-04 01:31:52,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:52,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-04 01:31:52,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 0 states 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 01:31:52,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states 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 01:31:52,275 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 237.0) internal successors, (1659), 7 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states 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 01:31:52,275 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 145 flow. Second operand 6 states and 758 transitions. [2023-08-04 01:31:52,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 93 transitions, 411 flow [2023-08-04 01:31:52,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 404 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:31:52,278 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 174 flow [2023-08-04 01:31:52,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 01:31:52,279 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2023-08-04 01:31:52,279 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 174 flow [2023-08-04 01:31:52,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.57142857142857) internal successors, (809), 7 states have internal predecessors, (809), 0 states have call successors, (0), 0 states 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 01:31:52,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:52,280 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:52,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 01:31:52,485 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,SelfDestructingSolverStorable10 [2023-08-04 01:31:52,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:52,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash -732732399, now seen corresponding path program 2 times [2023-08-04 01:31:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:52,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36565030] [2023-08-04 01:31:52,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:52,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:52,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:52,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36565030] [2023-08-04 01:31:52,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36565030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:52,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732656796] [2023-08-04 01:31:52,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:31:52,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:52,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:52,560 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 01:31:52,563 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 01:31:52,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 01:31:52,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:31:52,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-04 01:31:52,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:52,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:52,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732656796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:52,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:52,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-04 01:31:52,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048403196] [2023-08-04 01:31:52,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:52,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 01:31:52,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 01:31:52,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-04 01:31:52,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 174 flow. Second operand has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states 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 01:31:52,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:52,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:52,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:53,243 INFO L124 PetriNetUnfolderBase]: 4861/6433 cut-off events. [2023-08-04 01:31:53,243 INFO L125 PetriNetUnfolderBase]: For 2383/2383 co-relation queries the response was YES. [2023-08-04 01:31:53,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15420 conditions, 6433 events. 4861/6433 cut-off events. For 2383/2383 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22797 event pairs, 784 based on Foata normal form. 486/6855 useless extension candidates. Maximal degree in co-relation 6011. Up to 1587 conditions per place. [2023-08-04 01:31:53,291 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 146 selfloop transitions, 11 changer transitions 0/171 dead transitions. [2023-08-04 01:31:53,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 171 transitions, 764 flow [2023-08-04 01:31:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 01:31:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 01:31:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1517 transitions. [2023-08-04 01:31:53,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5334036568213784 [2023-08-04 01:31:53,295 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1517 transitions. [2023-08-04 01:31:53,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1517 transitions. [2023-08-04 01:31:53,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:53,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1517 transitions. [2023-08-04 01:31:53,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.41666666666667) internal successors, (1517), 12 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states 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 01:31:53,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states 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 01:31:53,303 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 237.0) internal successors, (3081), 13 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states 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 01:31:53,303 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 174 flow. Second operand 12 states and 1517 transitions. [2023-08-04 01:31:53,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 171 transitions, 764 flow [2023-08-04 01:31:53,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 171 transitions, 750 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 01:31:53,314 INFO L231 Difference]: Finished difference. Result has 77 places, 51 transitions, 244 flow [2023-08-04 01:31:53,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=244, PETRI_PLACES=77, PETRI_TRANSITIONS=51} [2023-08-04 01:31:53,314 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 31 predicate places. [2023-08-04 01:31:53,314 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 51 transitions, 244 flow [2023-08-04 01:31:53,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.84615384615384) internal successors, (1493), 13 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states 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 01:31:53,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:53,315 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:53,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 01:31:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:53,520 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:53,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -517041935, now seen corresponding path program 3 times [2023-08-04 01:31:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518915950] [2023-08-04 01:31:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:53,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:53,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:53,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:53,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518915950] [2023-08-04 01:31:53,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518915950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:53,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21903765] [2023-08-04 01:31:53,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 01:31:53,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:53,695 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 01:31:53,718 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 01:31:53,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-04 01:31:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:31:53,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-04 01:31:53,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:53,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:53,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21903765] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:53,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:53,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2023-08-04 01:31:53,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35911277] [2023-08-04 01:31:53,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:53,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 01:31:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:53,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 01:31:53,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-08-04 01:31:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 237 [2023-08-04 01:31:53,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 51 transitions, 244 flow. Second operand has 17 states, 17 states have (on average 114.70588235294117) internal successors, (1950), 17 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 01:31:53,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:53,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 237 [2023-08-04 01:31:53,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:31:54,761 INFO L124 PetriNetUnfolderBase]: 6157/8053 cut-off events. [2023-08-04 01:31:54,761 INFO L125 PetriNetUnfolderBase]: For 15019/15019 co-relation queries the response was YES. [2023-08-04 01:31:54,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21016 conditions, 8053 events. 6157/8053 cut-off events. For 15019/15019 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 27934 event pairs, 784 based on Foata normal form. 324/8313 useless extension candidates. Maximal degree in co-relation 12491. Up to 1587 conditions per place. [2023-08-04 01:31:54,816 INFO L140 encePairwiseOnDemand]: 234/237 looper letters, 194 selfloop transitions, 15 changer transitions 0/223 dead transitions. [2023-08-04 01:31:54,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 223 transitions, 1030 flow [2023-08-04 01:31:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 01:31:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 01:31:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2019 transitions. [2023-08-04 01:31:54,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324367088607594 [2023-08-04 01:31:54,821 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2019 transitions. [2023-08-04 01:31:54,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2019 transitions. [2023-08-04 01:31:54,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:31:54,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2019 transitions. [2023-08-04 01:31:54,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 126.1875) internal successors, (2019), 16 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:31:54,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 237.0) internal successors, (4029), 17 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states 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 01:31:54,832 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 237.0) internal successors, (4029), 17 states have internal predecessors, (4029), 0 states have call successors, (0), 0 states 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 01:31:54,832 INFO L175 Difference]: Start difference. First operand has 77 places, 51 transitions, 244 flow. Second operand 16 states and 2019 transitions. [2023-08-04 01:31:54,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 223 transitions, 1030 flow [2023-08-04 01:31:54,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 223 transitions, 974 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-08-04 01:31:54,854 INFO L231 Difference]: Finished difference. Result has 91 places, 55 transitions, 268 flow [2023-08-04 01:31:54,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=237, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=268, PETRI_PLACES=91, PETRI_TRANSITIONS=55} [2023-08-04 01:31:54,855 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 45 predicate places. [2023-08-04 01:31:54,855 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 55 transitions, 268 flow [2023-08-04 01:31:54,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 114.70588235294117) internal successors, (1950), 17 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states 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 01:31:54,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:31:54,856 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:31:54,867 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 01:31:55,061 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,SelfDestructingSolverStorable12 [2023-08-04 01:31:55,061 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:31:55,062 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:31:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1776649167, now seen corresponding path program 4 times [2023-08-04 01:31:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:31:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53971391] [2023-08-04 01:31:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:31:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:31:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:31:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:55,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:31:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53971391] [2023-08-04 01:31:55,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53971391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:31:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058300287] [2023-08-04 01:31:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 01:31:55,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:31:55,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:31:55,795 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 01:31:55,820 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 01:31:55,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 01:31:55,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:31:55,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-04 01:31:55,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:31:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:56,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:31:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:31:57,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058300287] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:31:57,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:31:57,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-08-04 01:31:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468215828] [2023-08-04 01:31:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:31:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-08-04 01:31:57,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:31:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-08-04 01:31:57,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2023-08-04 01:31:58,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 237 [2023-08-04 01:31:58,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 55 transitions, 268 flow. Second operand has 47 states, 47 states have (on average 107.65957446808511) internal successors, (5060), 47 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states 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 01:31:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:31:58,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 237 [2023-08-04 01:31:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand